POLYCHAETOUS ANNELIDS AND BENTHIC ENVIRONMENTS
IN TAMPA BAY, FLORIDA

By
JOHN LIPPINCOTT TAYLOR

A DISSERTATION PRESENTED TO THE GRADUATE COUNCIL OF

THE UNIVERSITY OF FLORIDA
IN PARTIAL FULFILLMENT OF THE REQUIREMENTS FOR THE
DEGREE OF DOCTOR OF PHILOSOPHY

UNIVERSITY OF FLORIDA
1971

ACKNOWLEDGMENTS

It is with pleasure and gratitude that I give my sin-
cere thanks to the faculty, colleagues, and friends who
assisted me in this study. I am especially indebted to
Dr. Robert M. DeWltt, Zoology Department chairman, and
chairman of my supervisory committee. While I was occupied
in the Tampa Bay area, he attended to many administrative
details associated with my program and conscientiously
guided my progress by letter and phone. Other committee
members. Dr. Frank J. S. Maturo, Jr. and Frank G. Nordlie,
Zoology Department, and Dr. Ernest S. Ford from Botany,
graciously gave help and encouragement during my research
and critically reviewed this dissertation as it arrived in
Gainesville in many installments. Without assistance from
my committee in other innumerable ways it would have been
far more difficult to pursue a doctoral program at the Uni-
versity of Florida while living and working at St. Peters-
burg Beach .

I am also grateful to the National Marine Fisheries
Service for employment during this study. Mr. Carl. H.

ii

Saloman, Fishery Biologist (Research) assisted me in all
phases of field work, and furnished hydrological data from
permanent water sampling stations located throughout Tampa
Bay. Other members of the Laboratory staff were also help-
ful and provided me with pertinent data from related re-
search projects. The tedious and time consuming task of
sorting animals from sediment collections was largely done
by part-time students from the University of South Florida
and St. Petersburg Junior College. These patient people
were: Eric Roth, Orlando Villot, John Jensen, Steve Henry,
Cathy Adams, Bob Ernest, Mike Mullens, Alan Burdett, Tom
Balrd, and Mike Marshall.

Drs. Marian H. Pettibone and Meredith L. Jones, Divi-
sion of Marine Worms, U. S. National Museum, Washington, D.C.,
kindly allowed me to use space and reference collections at
the Museum on two occasions, and otherwise helped by deter-
mining the taxonomic position of some of the polychaetes I
was unable to identify. I look forward to working further
at the Museum on Tampa Bay worms that have not yet been ade-
quately described.

My friends and neighbors, Dr. and Mrs. Walter F. Jeffers,
deserve special thanks for editorial help and typing the
dissertation in its final form.

ill

Finally, and with great affection, I wish to thank my
wife, Patricia, for her constancy and untiring help in
typing and data transcription.

iv

TABLE OF CONTENTS

PAGE

ACKNOWLEDGMENTS 11

LIST OP TABLES . viii

LIST OF FIGURES , . . . . xxvii.

ft c>S i RAG " »•»••«»♦»*»•«•«••»••■•••»■••••••*••*••»•*••••• 2QC*Lx

CHAPTER 1

INTRODUCTION 1

CHAPTER 2

DERIVATION OF THE FAUtfA 5

Currents and cirailititc . 9

Sediments ................ ........ 11

Clirnata, Hydrology , and Fvctr tents ........... 1<S

Emergent and Subinerrrcnt Vegetation 22

Animal As semta laces 24

Human Ir.f lusvici? , 27

CHAPTER 3

TAMPA BAY ESTUARY . , . . . 30

location and Confl.cyrat.icn ................... 30

Cl.iiT-.te r.r.d Tribuciry Wivccr^. ..,.,,.,,.„. 34

Coast a j _i?'2vejl££aent; • • • « ?'-"

Hy3.ro leery- . . . , 39

Submerged Vegetation 58

Sediments 53

CHAPTER 4

PROCEDURE - . . 62

CHAPTER 5

SYSTEMATICA AKD ECOLOGICAL OBSERVATIONS CC

PAGE

Family POLYNOIDAE 67

Family POLYODONTIDAE 96

Family SIGALIONIDAE 102

Family PISIONIDAE 116

Family CHRYSOPETALIDAE 119

Family AMPHINOMIDAE 124

Family PHYLLODOCIDAE 130

Family HESIONIDAE 152

Family PILARGIDAE 173

Family SYLLIDAE 189

Family NEREIDAE 240

Family NEPHTYIDAE 277

Family GLYCERIDAE .'. 292

Family GONIADIDAE 301

Family ONUPHIDAE 312

Family EUNICIDAE 336

Family LUMBRINERIDAE 346

Family ARABELLIDAE 366

Family DORVILLEIDAE 381

Family LYSARETIDAE 393

Family ORBINIIDAE 394

Family PARAONIDAE 417

Family SPIONIDAE 434

Family MAGBLONIDAE 487

Family POECILOCHAETIDAE 491

Family TROCHOCHAETIDAE 495

Family CHAETOPTERIDAE 499

Family CIRRATULIDAE 523

Family FLABELLIGERIDAE 565

Family OPHELIIDAE 568

Family CAPITELLIDAE 581

Family ARENICOLIDAE 613

Family MALDANIDAE 617

Family OWEHIIDAE 637

Family SABELLARIIDAE 650

Family PECTINARIIDAE 657

Family AMPHARETIDAE 663

Family TEREBELLIDAE 674

Family SABELLIDAE 703

Family SERPULIDAE 723

vi

PAGE

CHAPTER 6

BIOCEOGRAPHY, REPRODUCTION, ABUNDANCE AND

DISTRIBUTION 729

Biogeogr aphy 72?

Reproduction 730

Abundance and Distribution 7 30

APPENDIX A 749

APPENDIX B 867

LITERATURE. CITED 1295

BIOGRAPHICAL SKETCH 1332

vii

LIST OF TABLES

PAGE

Table 1. — Mean annual values for nitrite-nitrate
nitrogen, total phosphorus, copper,
carbohydrate, and protein from water
inshore (IS) and offshore (OS) at
three points along the west coast of
Florida. Data from Finucane and
Dragovich (1959) — Tampa Bay stations
17 and 20; Charlotte Harbor stations
3 and 34; Everglades stations 37 and
56

21

Table 2. — Yearly mean and range for hydrological
factors recorded at the surface in six
areas of Tampa Bay Estuary, Florida, in
1963 and 1967 (Finucane and Dragovich,
1966; Taylor and Saloman, 1968; Saloman
and Taylor, 1971)

51

Table 3. — Mean and range of sediment grain size,

sorting, and content of calcium carbonate

and organic carbon in six areas of Tampa

Bay Estuary — 1963 61

Table 4. — Harmothoe lunulata ~ Locality records 71

Table 5. — Harmothoe lunulata — Environmental

factors 72

Table 6. — Lepidasthenia commensalis — Locality

records „ . . ..» ... 74

Table 7 . — Lepidasthenia commensalis — Environmental

factors ..„.,... 75

Table 8. — Lepidonotus sublevis — Locality records ... 77

Table 9. — Lepidonotus sublevis — Environmental

factors 78

Table 10. — Lepidonotus variabilis — Locality

records „ 80

PAGE

Table 11. — Lepldonotus variabilis — Environmental

factors 81

Table 12. — Phyllohartmania taylorl — Locality

records 83

Table 13. — Phyllohartmania taylori — Environmental

factors 84

Table 14. — Polynold A — Locality records 87

Table 15. — Polvnoid A — Environmental factors 88

Table 16. — Polynold B — Locality records 91

Table 17. — Polvnoid B — Environmental factors 93

Table 18. — Polyodontes lupina — Locality records 98

Table 19.-- Polyodontes lupina — Environmental

factors 99

Table 20. — Sigallon arenicola — Locality records 104

Table 21. — Sigallon arenicola — Environmental

factors 105

Table 22. — Sthenelais boa — Locality records 107

Table 23. — Sthenelais boa — Environmental factors ....110

Table 24. — Pholoe sp. — Locality records 112

Table 25, — Pholoe sp, — Environmental factors ...,.,.,113

Table 26, — Pisione remota — Locality records .........117

Table 27. — ■ Pisione remota — Environmental factors ....118

Table 28. — Paleanotus heteroseta ■ — Locality records. . .121

Table 29. — Paleanotus heteroseta — Environmental

factors „ 123

Ix

PAGE

Table 30. — Ev.phrosyne triloba — Locality records .... 125

Table 31. — Pseudeurythoe ambigua — Locality

records 127

Table 32.— Pseudeurythoe ambigua — Environmental

factors 129

Table 33. — Eteone heteropoda — Locality records 133

Table 34. — Eteone heteropoda — Environmental

factors 135

Table 35. — Eumida sanguines — Locality records 137

Table 36, — Eumida sanguinea — Environmental

factors 138

Table 37. — Paranaites speciosa — Locality records ... 140

Table 38.-- Paranaites speciosa - — Environmental

factors 141

Table 39. — Phyllodoce arena e — Locality records 144

Table 40. — Phyllodoce arenas — Environmental

factors 148

Table 41. — Phyllodoce fragilis — Locality records ... 150

Table 42. — Phyllodoce fragilis — Environmental

factors 151

Table 43. — Hesione picta — Locality records 154

Table 44. — Gyptis vittata — Locality records 156

Table 45. — Gyotis vittata — Environmental factors 159

Table 46.— Parahesione luteola — Locality records.... 16.1

Table 47.™ Parahesione luteola — Environmental

factors 163

x

PAGE

Table 48. — godarke obscura — Locality records 165

Table 49. — godarke obscura — Environmental

factors 166

Table 50. — Gyptis sp. — Locality records 169

Teible 51. — Gyptis sp. — Environmental factors 170

Table 52. — Ancistrosyllis jonesi — Locality records.. 175

Table 53. — Ancistrosyllis jonesi — Environmental

factors 176

Table 54. — Cabira incerta — Locality records 178

Table 55.-- Cabira incerta — Environmental factors.... 179

Table 56. — Pilarqis pacifica — Locality records 181

Table 57. — Pilarqis pacifica — Environmental factors.. 18?

Table 58. — Sigambra bassi — Locality records 184

Table 59. — Sigambra bassi — Environmental factors ... 185

Table 60. — Sigambra tentaculata — Locality records .. 187

Table 61. — Sigambra tentaculata — Environmental

factors 188

Table 62. — Autolytus cornutus — Locality records .... 193

Table 63. — Autolytus cornutus — Environmental

factors , 194

Table 64. — Branchiosyllis oculata — Locality records. 196

Table 65. — Branchiosyllis oculata — Environmental

factors ,. 197

Table. 66. — Brania clayata — Locality records 199

xi

PAGE

Table 67. — Brania clavata — Environmental

factors 200

Table 68. — Exogone dispar — Locality records 202

Table 69. — Exogone dispar — Environmental factors.,.. 204

Table 70. — Syllis aciculata — Locality records . 207

Table 71. — Syllis aciculata — Environmental factors.. 208

Table 72. — Syllis annularis — Locality records 210

Table 73. — Syllis annularis — Environmental factors.. 211

Table 74. — Syllis gracilis — Locality records 213

Table 75. — Syllis gracilis — Environmental factors... 214

Table 76. — Syllis spongicola '■ — Locality records 216

Table 77. — Syllis varieqata — Locality records ...... 218

Table 78. — Syllis variegata — Environmental factors.. 219

Table 79. — Syllis vittata — Locality records 221

Table 80. — Syllis vittata — Environmental factors ... 222

Table 81. — Brania sp. — Locality records 224

Table 82. — Brania sp. — Environmental factors ....... 225

Table 83. — Pionosyllis sp. — Locality records 227

Table 84. — Pionosyllis sp. — Environmental factors... 228

Table 85. — Sphaerosyllis sp. — Locality records 230

Table 86. — Sphaerosyllis sp. — Environmental

factors 231

Table 37. — Syllis sp.A — Locality records 233

xii

PAGE

Table 88. — Syllls sp. A — Environmental factors 234

Table 89, — Syllls sp. B — Locality records 236

Table 90. — Syllls sp. B — Environmental factors 237

Table 91. — Ceratonereis irritabilis — Locality

records 243

Table 92. — Ceratonereis irritabilis — Environmental

factors 244

Table 93. — Laeonerels culveri — Locality records 246

Table 94. — Laeonerels culveri — Environmental

factors 247

Table 95. — Nereis arenaceodentata — Locality

records 251

Table 96.— Nereis arenaceodentata — Environmental

factors 25 3

Table 97. — Nereis pelagica occidentalis — Locality

records 255

Table 98. — Nereis pelagica occidentalis -- Environ-
mental factors 257

Table 99. — Nereis succinea — Locality records 259

Table 100. — Nereis succinea — Environmental factors ... 264

Table 101.- — Nicon lackeyi — Locality records .......... 266

Table 102, — Nicon lackeyi — Environmental factors . . 267

Table 103. — Perinereis floridana -- Locality records ... 269

Table 104. — Perinereis floridana — Environmental

factors 270

Table 105. — Platynerels dumerilii — Locality

records 272

xiil

PAGE

Table 106. — Platynereis dumerilii — Environmental

factors 274

Table 107. — Rullierinereis mexicana - Locality

records 276

Table 108. — Aqlaonbaiiuis verrilli — Locality records .. 279

Table 10S. — Aglaophamus verrilli — Environmental

factors 281

Table 110. — Nephtys bucera — Locality records ........ 283

Table 111. — Nephtys bucera — Environmental factors ... 234

Table 112. — Nephtys magellanica — Locality records ... 286

Table 113. — Nephtvs maqellanica — Environmental

factors 287

Table 114. — Nephtys picta — Locality records 239

Table 115. — Hephtys picba — EnvironiT.ental factors .... 291

Table 116. — Glycera amerlcana — Locality records ..... 294

Table 117.— Glycera amerlcana — Environmental

factors 297

Table 118. — Glycera dibranchiata — Locality records .. 299

Table 119. — Glycera dibranchiata — Environmental

factors 300

Table 120. — Glycinde pacifica — Locality records 303

Table 121. — Glycinde pacifica — Environmental

factors , 307

Table 122. — Gonladella sp. — Locality records 310

Table 123. — Goniadella sp. — Environmental factors ... 311

Table 124. — Diopatra cuprea — Locality records 314

xiv

PAGE

Table 125. — Dlopatra cuprea — Environmental factors ...317

Table 126. — Onuphls eremlta oculata — Locality records. 319

Table 127. — Onuphis eremita oculata — Environmental

factors 320

Table 128. — Onuphis magna — Locality records 322

Table 129. — Onuphis magna — Environmental factors 323

Table 130. — Onuphis nebulosa — Locality records 325

Table 131. — Onuphis nebulosa — Environmental factors ..327

Table 132. — Onuphis sp. — Locality records ....330

Table 133. — onuphis sp. — Environmental factors 333

Table 134. — Eunice rubra — Locality records 338

Table 135. — Marphysa sanguinea — Locality records 340

Table 136. — Marphysa sanguinea — Environmental

factors 342

Table 137. — Nematonereis hebes — Locality records 344

Table 138. — Nematonereis hebes — Environmental

factors 345

Table 139. — Lumbrineris bassl — Locality records 349

Table 140. — Lumbrineris bassi — Environmental factors .350

Table 141. — Lumbrineris cocclnea — Locality records ...352

Table 142. — Lumbrineris cocclnea — Environmental

factors ...353

Table 143. — Lumbrineris erecta — Locality records 355

Table 144. — Lumbrineris erecta — Environmental

factors 356

xv

PAGE

Table 145. — Lumbrineris impatians — Locality

records 358

Table 146. — Lumbrineris iir.patiens — Environmental

factors 359

Table 147. — Lumbrineris latreilli — Locality records.. 361

Table 148. — Lunibrineris latreilli — Environmental

factors 362

Table 149. — Lumbrineris sp. — Locality records 364

Table 150. — Lumbrineris sp. — Environmental

factors 365

Table 151. — Arabella iricolor — Locality records 368

Table 152. — Arabella iricolor — Environmental

factors i 369

Table 153. — Drilonereis cylindrica — Locality records. 371

Table 154. — Drilonereis cylindrica — Environmental

factors 372

Table 155. — Drilonereis longa — Locality records 374

Table 156. — Drilonereis longa — Environmental

factors 375

Table 157 .--Drilonereis magna — Locality records 377

Table 158. — Drilonereis magna — Environmental

factors , 37S

Table 159. — Arabella sp. — Locality records 380

Table 16Q.--Dorvillea rudolphi — Locality records 383

Table 161. — Dorvillea rudolphi — Environmental

factors .'........... 384

Table 162. — Oohrvotrocha puerilis — Locality records.. 386

xvi

PAGE

Table 163. — Ophryotrocha puerills. — Environmental

factors 387

Table 164. — Dorvillea sp. — Locality records 389

Table 165. — Dorvillea sp. — Environmental factors .... 390

Table 166. — Naineris setosa -- Locality records 396

Table 167. — Naineris setosa — Environmental factors .. 397

Table 168. — orblnia ornata — Locality records 399

Table 169. — Orbinia ornata — Environmental factors ... 400

Table 170. — Scoloplos fragilis — Locality records .... 402

Table 171. — Scoloplos fragilis — Environment?.!

factors 403

Table. 172. — Scoloplos robustus — Locality records .... 405

Table 17 3. — Scoloplos robustus — Environmental

factors 407

Table 174. — Scoloplos rubra — Locality records 409

Table 175. — Scoloplos rubra — Environmental factors .. 412

Table 176. — Naineris sp. — Locality records 415

Table 177. — Naineris sp. — Environmental factors 416

Table 178. — Aricidea fragilis — Locality records 419

Table 179. — Aricidea fragilis — Environmental

factors 422

Table 180. — Aricidea taylori — Locality records 424

Table 181. — Aricidea taylori — Environmental factors.. 425

Table 182. — Cirxophorus furcatus — Locality records ...427

xvii

PAGE
Table 183. — Clrrophorus furcatus — Environmental

factors 428

Table 184. — Arlcldea sp. — Locality records 430

Table 185. — Arlcldea sp. — Environmental factors 431

Table 186. — Aonldes mayaguezensis — Locality records . 437

Table 187. — Aonldes mayaguezensis — Environmental

factors 438

Table 188. — Apoprionosplo pygmaea — Locality records . 440

Table 189. — Apoprionosplo pygmaea — Environmental

factors 442

Table 190. — Dispio uncinata — Locality records 444

Table 191. — Dis^pio uncinata — Environmental factors .. 445

Table 192. — Paraprlonosplo pinnata — Locality records. 447

Table 193 . —Paraprlonosplo pinnata — Environmental

factors >>#< 45i

Table 194.— Polydora socialis — Locality records 453

Table 195.— Polydora socialis — Environmental

factors m 456

Table 196. — Polydora websteri — Locality records 458

Table 197.— Polydora websteri — Environmental factors. 460

Table 198.— Prlonospio cirrobranchiata — Locality

records , , oc#j 462

Table 199.— Prionospio cirrobranchiata — Environmental

factors a _ 464

Table 200.— Prionospio heterobranchia texana — Locality

records 466

Table 201.— Prionospio heterobranchia texana — Environ-
mental factors 46g

xviii

PAGE

Table 202. — Scolelepis squamata -- Locality records ... 470

Table 203. — Scolelepis squama ta — Environmental

factors 47 2

Table 204. — Spio setosa — Locality records 474

Table 205. — Spio setosa — Environmental factors 475

Table 206. — Spiophanes bornbyx — Locality records 477

Table 207. — Spiophanes bornbyx — Environmental factors. 478

Table 208. — Streblospio benedicti — Locality records . 480

Table 209. — Streblospio benedicti — Environmental

factors 482

Table 210. — Pseudopolydora sp. — Locality records 434

Table 211. — Pseudopolydora sp. — Environmental factors. 486

Table 212. — Maqelona pettiboneae — Locality records .. 488

Table 213. — Maqe.lona pettiboneae — Environmental

factors 490

Table 214 . - -Poecilochaetus johnsoni — Locality

records , 493

Table 215. — Poecilochaetus johnsoni — Environmental

factors 494

Table 216. — Trochochaeta sp. — Locality records 497

Table 217. — Trochochaeta sp. — Environmental

factors 498

Table 218 . — Chaetopterus variopcdatus — Locality

records 501

Table 219. — Chaatopterus variopedatus — Environmental

factors 503

xix

PAGE

Table 220. — Spiochaetopterus costarum oculatus —

Locality records 505

Table 221. — Spiochaetopterus costarum oculatus —

Environmental factors 510

Table 222. — Mesochaetopterus sp. A — Locality

records 512

Table 223. — Mesochaetopterus sp. A — Environmental

factors 513

Table 224. — Mesochaetopterus sp. B — Locality records. 517

Table 225. — Mesochaetopterus sp. B — Environmental

factors 518

Table 226. — Mesochaetopterus sp. C — Locality records. 520

Table 227.— Clrratulus grandis — Locality records .... 527

Table 228. — Clrratulus grandis — Environmental

factors 529

Table 229. — Clrrlformia flllgera — Locality records .. 531

Table 230. — Cirriformia fillgera — Environmental

factors 532

Table 231. — Dodecacerla concharum — Locality records . 534

Table 232. — Clrratulus sp. A — Locality records 536

Table 233. — Clrratulus sp. A — Environmental factors . 537

Table 234. — Clrratulus sp. B — Locality records 539

Table 235. — Clrratulus sp. B — Environmental factors . 540

Table 236. — Clrratulus sp. C — Locality records 542

Table 237. — Clrratulus sp. C — Environmental

factors 543

PAGE

Table 238. — Cirratulus sp. D — Locality records 545

Table 239. — Cirratulus sp. D — Environmental factors.. 546

Table 240. — Cirriformia sp. A — Locality records 548

Table 241. — Cirriformia sp. A — Environmental

factors -. 549

Table 242. — Cirriformia sp. B — Locality records 551

Table 243. — Cirriformia sp. B — Environmental factors.. 552

Table 244. — Tharyx sp. A — Locality records 554

Table 245. — Tharyx sp. A — Environmental factors 555

Table 246. — Tharyx sp. B — Locality records 557

Table 247. — Tharyx sp. B — Environmental factors ...... 553

Table 248. — Tharyx sp. C — Locality records ........... 560

Table 249. — Tharyx sp. C — Environmental factors 562

Table 250. — Pherusa arenosa — Locality records 566

Table 251. — Pherusa arenosa — Environmental factors... 567

Table 252. — Ammotrypane aulogaster - Locality records.. 570

Table 253. — Ammotrypane aulogaster — Environmsn tal

factors 571

Table 254. — Armandia agilis — Locality records 573

Table 255. — Armandia agilis — Environmental factors.,.. 574

Table 256. — Travisia sp. — Locality records 577

Table 257. — Travisia sp. — Environmental factors 530

Table 258. — Capitella capitata -- Locality records .... 584

PAGE

Table 259. — Capitslla capitata — Environmental

factors 586

Table 260- — Capitel Hides jor.csi — Locality records ... 588

Table 261. — Caoitelliaas jonesi — Environmental

factors 589

Table 262. — Capitomastus aciculatus — Locality records. 591

Table 263. — Cagitomastus aciculatus — Environmental

factors 592

Table 264. — Dasybranchus lumbricoides — Locality

records 594

Table 265. — Dasybranchus lumbricoides — Environmental

factors 595

Table 266 . --Dasybranchus lunulatus — Locality records. 597

Table 267. — Dasybranghus lunulatus — Environmental

factors 598

Table 268. — Keteromastus fillf onnis — Locality

records 600

Table 269. — Heteromastus f iliformis — Environmental

factors 603

Table 270.--Notomastus heroipodus — Locality records... 605

Table 27 1 . --Kotomastus heroipodus — Environmental

factors 606

Table 272. — Notomastus latericeus — Locality records.. 608

Table 27 3.--Kotomastus latericeus — Environmental

factors 609

Table 274. — Scyphoproctiis platyproctus — Locality

records 611

Table 275. — Scyphoproctus platyproctus — Environ-
mental factors 612

XIvll

PAGE

Table 276. — Arenlcola crlstata — Locality records .... 615

Table 277. — Arenlcola crlstata — Environmental

factors 616

Table 278. — Branchioasychis amerlcana — Locality

records 620

Table 279. — Branchioasychis amerlcana — Environmental

factors 622

Table 280. — Clymenella mucosa — Locality records 624

Table 281. — Clymenella mucosa — Environmental

factors 627

Table 282. — Clymenella torquata callda — Locality

records m 629

Table 283. — Clymenella torquata callda — Environ-
mental factors 630

Table 284.— Clymenella zonalis — Locality records .... 632

Table 285. — Clymenella zonalis — Environmental

factors 633

Table 286. — Maldane sarsi — Locality records 635

Table 287. —Maldane sarsi — Environmental factors .... 636

Table 288.— Boguea eniqmatica — Locality records 639

Table 289.— Boguea eniqmatica — Environmental factors. 640

Table 290.— Owenia fusiformls — Locality records ..... 642

Table 291.— Owenia fusiformis — Environmental factors. 644

Table 292.— Myrlochele sp. — Locality records ........ 646

Table 293.— Myrlochele sp. — Environmental factors ... 647

Table 294.— Sabellarla floridensis — Locality

records

652

xxlii

PAGE

Table 295. — Sabellaria floridensis — Environmental

factors 653

Table 296. — Sabellaria gracilis — Locality records ... 655

Table 297. — Sabellaria gracilis — Environmental

factors 656

Table 298. — Cistenides gouldil — Locality records .... 659

Table 299. — Cistenides gouldii — Environmental

factors 662

Table 300. — Isolda pulchella — Locality records 665

Table 301. — Isolda pulchella — Environmental factors... 667

Table 302. — Melinna maculata — Locality records 669

Table 303. — Melinna maculata — Environmental factors.. 670

Table 304. — Sabellides oculata — Locality records .... 672

Table 305. — Sabellides oculata — Environmental

factors 673

Table 306. — Enoplobranchus sanguineus — Locality

records 677

Table 307. — Enoplobranchus sanguineus — Environmental

factors 678

Table 308. — Loimia medusa — Locality records 680

Table 309. — Loimia medusa — Environmental factors .... 681

Table 310. — Loimia viridis — Locality records .. 68j

Table 311. — Loimia viridis — Environmental factors ... 6c-

Table 312. — Pista cristata — Locality records 6<36

Table 313. — Pista cristata — Environmental factors .. 687

xxiv

PAGE

Table 314. — Pista palmata — Locality records 689

Table 315. — Plsta palmata — Environmental factors .... 690

Table 316. — Polycirrus eximius — Locality records .... 692

Table 317. — Polycirrus eximius — Environmental

factors 693

Table 318. — Terebella rubra — Locality records 695

Table 319. — Terebella rubra — Environmental factors... 696

Table 320.— Thelepus setosus — Locality records 698

Table 321. — Thelepus setosus — Environmental factors.. 699

Table 322. — Trichobranchus glacialis — Locality

records 701

Table 32 3. — Trichobranchus glacialis — Environmental

factors 702

Table 324. — Branchiomma nigromaeulata — Locality

records 706

Table 325. — Branchiomma nigromaculata — Environmental

factors 707

Table 326, — Chone duneri — Locality records 7C9

Table 327. — Chone dunari — Environmental factors 710

Table 328. — Fabricia sabella — Locality records 712

Table 329. — Fabricia sabella -- Environmental

factors , 713

Table 330. — MegalOTiraa bioculatum — Locality records... 715

Table 331. — Megalomina bioculatiun — Environmental

factors ". 716

Table 332. — Kegalomma lobi f ervun — Locality records ... 718

PAGE

Table 333. — Mega 1 omnia loblferum — Environmental

factors . . _ # 7 jg

Table 334. — Sabella microphthalma — Locality records.. 721

Table 335. — Sabella microphthalma — Environmental

factors 722

Table 336.— Eupomatus dianthus — Locality records .... 725

Table 337.— Eupomatus dianthus — Environmental factors 726

Table 338. — Abundance and distribution of polychaetes
collected in Tampa Bay Estuary, Florida,
at survey stations and other localities
between 1963 and 1969 — Old Tampa Bay
(OTB), Hillsborough Bay (HB), upper Tampa
Bay (UTB), Boca Ciega Bay (BCB), Terra Ceia
Bay (TCB), lower Tampa Bay (LTB) — asterisk
indicates new geographic record for Gulf
of Mexico — very rare (1-10) rare (11-30)
common (31-60) very common (over 60) 739

xxvl

LIST OF FIGURES

PAGE

Figure 1. — Tampa Bay Estuary showing transect and

lettered stations (solid circles) in the
benthic survey of 196 3, and biomass sta-
tions (solid triangles) sampled between
1963 and 1969. Solid lines show county
boundaries, dotted line indicates main
ship channels, and dashed lines delineate
major areas of the Estuary. Small is-
lands and spoil banks are shown in
black , .... . . . 32

Figure 2. — Diagnostic features of Polynoid A and

Polvnold B 95

Figure 3. — Diagnostic features of Polyodontes sp.

and Pholoe sp 115

Figure 4. — Diagnostic features of Gyptis sp 172

Figure 5. — Diagnostic features of Brania sp., Piono-
syllls sp., Sphaerosyllis sp., Syllis sp.
A and Syllis sp. B 239

Figure 6. — Diagnostic features of Goniadella sp. and

Onuphis sp 335

Figure 7. — Diagnostic features of Lumbrineris sp.,

Arabella sp., and Dorvlllea sp 392

Figure 8. — Diagnostic features of Nalneris sp., and

Aricidea sp, „ 433

Figure 9. — Diagnostic features of Pseudopolydora sp.,
Trochochaeta sp . , and Mesochaetopterus
sp. A 515

xxvli

PAGE

Figure 10. — Diagnostic features of .Mesochaetopterus

sp. B, and Mesochaetopterus sp. C 522

Figure 11. — Diagnostic features of Cirratulus sp. A,

Cirratulus sp. E, Cirratulus sp. C, Cirra-
tulus sp. D, Cirriformia sp. A, Cirrif ormia
sp. B, Tharyy. sp. A, and Tharyx sp. c 564

Figure 12. — Diagnostic features of Travisia sp.,
Clymenella torquata calida, and
Myriochele sp 649

Abstract of Dissertation Presented to the Graduate Coun-
cil of the University of Florida in Partial Fulfillment of
the Requirements for the Degree of Doctor of Philosophy

POLYCHAETOUS ANNELIDS AND BENTHIC ENVIRONMENTS
IN TAMPA BAY, FLORIDA

By

JOHN LIPPINCOTT TAYLOR

August, 1971

Chairman: Dr. Robert M. DeWitt
Major Department: Zoology

This dissertation is a systematic and ecological
account of the polychaete worms found in Tampa Bay,
Florida, between 1963 and 1969. The study was part of
a benthic investigation, sponsored by the National
Marine Fisheries Service, to determine the qualitative
and quantitative distribution of benthic animals that
are important to sport and commercial fisheries.

Bottom samples were collected by dredge at 363 sur-
vey stations and numerous incidental localities. The
polychaetes were separated from sediments on a screen of
0.701 mm. mesh.

A total of 178 species of polychaetes were collected.
They were divided among 130 genera and 40 families. Two
families (PISIONIDAE and TROCHOCHAETIDAE ) and 35 species

xx ix

are newly reported for the Gulf of Mexico. The more
saline areas of Tampa Bay were found to support the
greatest species diversity as well as the greatest
number of Individual worms per dredge sample. Areas
of low diversity and few polychaetes were limited to
Hillsborough Bay where there is high sewage pollution
and Boca Ciega Bay where dredge-fill development is
widespread.

Data on polychaete distribution and abundance show
that Tampa Bay supports a rich and varied polychaete
fauna, and much of the Estuary still remains in a nearly
natural condition.

CHAPTER 1
INTRODUCTION

This report is a systematic and ecological account of
the polychaete worms collected in Tampa Bay, Florida, be-
tween June 1963 and June, 1969. The study was supported
by the National Marine Fisheries Service as part of an
estuarine survey that extended from the upper reaches of
the Bay to 9.8 km. offshore in the adjacent Gulf of Mexico.
The main purpose of the survey was to determine the qualita-
tive and quantitative distribution of benthic invertebrates
that directly and indirectly support commercial and sport
fisheries in the Gulf of Mexico. Other objectives were (1)
to evaluate the effects of pollution and coastal develop-
ments on estuarine environments, and (2) to compare the
benthos in Tampa Bay to that of other estuaries in the south-
east and elsewhere. Most of the biological and environmental
data were collected at 363 stations sampled in 1963 and 1964.
Additional information came from areas of the Bay that were
sampled for other laboratory projects that included research
on hydrology, sediments, coastal alterations, and polychaete
marlculture.

2

The direct relationship between benthlc biomass and
abundance of ground fishes was first documented by Petersen
and Jensen (1911). Later, observations by Petersen and
others established the idea that similar bottom environ-
ments support similar benthlc communities that can be dis-
tinguished by certain characteristic species (Thorson, 1969).
The practical aspects of Petersen's work, and his concept
of bottom communities, stimulated complementary lines of
academic and fishery investigations which now comprise a
large and diversified field of benthic, ecological research
(Mare, 1944; Jones, 1950? Drach, 1960; Wlgley, 1961; Day,
1964; Sanders, Hessler, and Hampson, 1965; Carriker, 1967;
Muus, 1967; Peres, 1967; Mclntyre and Eleftheriou, 1968;
Sanders, 1968, 1969; Fenchel, 1969; Gibbs, 1969; Hargrave,
1969; Lie, 1969; Makarov and Averin, 1969; Mclntyre, 1969;
Rowe, 1969; Sanders and Hessler, 1969; Tietjen, 1969;
Barnard, 1970; Johnson, 1970; Lie and Kisker, 1970; Luksenas,
1970; Mclntyre, 1970; Neyman, 1970; Pearson, 1970).

A comparatively recent area of benthic study deals with
the effects of pollution and coastal development on bottom
communities. The benthos is sensitive to environmental change,
and community composition can be drastically altered or elim-
inated depending on the type and degree of modification
(Reish, 1959; McNulty, 1966; Saville, 1966; Bartsch,

3
Callaway, Wagner, and Woelke, 1967; Olson and Burgess,
1967; Taylor and Saloman, 1968; Bagge, 1969; Copeland,
1970; Golublc, 1970; Sykes and Hall, 1970; Taylor, Hall,
and Saloman, 1970; Taylor, 1970). Polychaetes are domi-
nant forms in most benthic communities, and in disturbed
areas they are often the last metazoans to survive before
bottom conditions become abiotic (Theede, Ponat, Hiroki,
and Schlieper, 1969; Turner and Strachan, 1969).

On the basis of comparative benthic studies, Sanders
(1968) concluded that polychaetes, together with mollusks,
account for about 80 percent of the infauna retained in a
sieve of 0.4-mm. mesh. In Florida, studies of Biscayne Bay
and Alligator Harbor, and my own work along the west coast
also showed that polychaetes were a major component of the
littoral infauna (McNulty, 1966; O'Gower and Wacasey, 1967;
Moore, Davies, Fraser, Gore, and Lopes, 1968; Nagyi, 1968).
Hartman (1951) remarked upon the vast, shallow-water poly-
chaete fauna throughout the Gulf of Mexico, and Rowe (1966)
reported on the abundance of polychaetes in the vicinity of
the Sigsbee Deep from bottom samples collected at 100 fathoms
down to the abyss at 2,000 fathoms.

Study of polychaetes, and other forage organisms, is

1
Data on file at the National Marine Fisheries Service
Biological Laboratory, St. Petersburg Beach, Florida. 33706

4
particularly important in the Gulf of Mexico because Gulf
fisheries are more valuable than those in any other geo-
graphic region of the United States. The annual wholesale
value of the Gulf catch is over 180,000,000 dollars, and
represents more than one-third of the total value of U. S.
marine landings that were worth 504,500,000 dollars in 1969
(Riley, 1970). It is important to note that most of the
sport and commercial species of the Gulf (65 to 90 percent
depending on geographic area) spend all or part of their
lives in estuaries (Rounsefell, 1954; Gunter, 1967; McHugh,
1967; Sykes,1967, 1968; Turner, 1969). In Tampa Bay, for
example, Sykes and Finucane (1966) found juveniles and adults
of 23 species of sport and commercial fishes. The high fish-
ery production that is characteristic of estuaries surround-
ing the Gulf of Mexico ultimately depends on high organic
production at lower trophic levels. There, as planktonic
larvae, and as adults that swim, crawl, or burrow, the ubiq-
uitous polychaetes enter the food webs of fishery species
(Hedgpeth, 1954; Reid, 1954; Smith, 1954; Williams, 1955;
Darnell, 1958; Eldred, Ingle, Woodburn, Hutton, and Jones,
1961; Hall, 1962; Tagatz, 1968; Sastrakusumah, 1970).

CHAPTER 2
DERIVATION OF THE FAUNA

Hartman (1951) recognized that the polychaete fauna
of the Gulf of Mexico consists of (1) a distinct group
associated with the Mississippi drainage system, (2) a
group with West Indian affinities, (3) an assemblage com-
monly collected along the eastern seaboard north to New
England, (4) species known also from the warmer waters of
the eastern Pacific, and (5) a group with world-wide dis-
tribution in low latitudes. Representatives of all these
groups were found in Tampa Bay. Their occurrence may be
explained in terms of historical events in the Gulf Basin
and local environmental conditions that now prevail.

The Gulf Basin
According to Murray (1961) the Gulf Basin developed
as a shallow trough during the Paleozoic era, and was first
flooded by the sea in the Mesozoic about Jurassic time.
This invasion coincides with the time when Yarborough (1967)
and Bullard (1969) believe that a rift, caused by continental

6
drift, separated the Americas from western Europe and Africa.
Progressive deepening of the Basin was apparently due to
the weight of sediments that have accumulated over a shear-
line around the rim since the Triassic period (Eardley, 1951;
Murray, 1961; Rainwater, 1967). Since Tertiary time, the
Gulf of Mexico has probably been a deep sea (Galtsoff, 1954)
and its water level and area have fluctuated periodically
in response to sea level changes and peripheral, tectonic
activity (Rainwater, 1967).

Until the Miocene (25,000,000 years before present)
the Gulf and the Atlantic Ocean were confluent across what
is now peninsular Florida and the south Atlantic coastal
plain (Cooke, 1945; Cheetham, 1963). Subsequent separation
of the two seas by continental uplifting blocked the ingress
of mid -Atlantic water and probably marked the last period of
cold water in the Gulf (Alt and Brooks, 1965). The expansive
Gulf-Atlantic connection through mid-Tertiary time allowed
interchange of polychaetes and other neritic forms between
the two seas. Hedgpeth (1953) and other authors mention
this connection as a means of explaining the many patterns
of disjunctive distribution between species that now in-
habit the northern Gulf and the western Atlantic north of
Cape Canaveral (Hartman, 1951; Galtsoff, 1954; Humm, 1969).

7
The Caribbean has existed since at least mid-Mesozoic
time (Ewing, 1968) and through that sea there have been
several periods of Atlantic-Pacific connection across
Central America, in chronological order, portals existed
in Jurrasslc, Cretaceous, mid-Teriary, and Pliocene time
(Eardley, 1951; Lloyd, 1963; Rublnoff, 1968). As a conse-
quence, many amphi-American species now occur on eastern
and western sides of Central America, and there is still
limited transmigration through the Panama Canal (Gilbert
and Starks, 1904; Hildebrand, 1939; Rubinoff, 1968).
From the Caribbean Sea, polychaetes have probably always
had access to the Gulf through the Yucatan Strait. There
is also geological evidence that indicates a past Gulf con-
nection to the western Arctic through the Mississippi em-
bayment during upper Cretaceous time (Rainwater, 1967).

Upland terraces and submerged sills around the periph-
ery of the Gulf of Mexico are evidence of sea level oscil-
lations during the glacial and interglacial periods of the
Pleistocene. During that epoch, former sea stands, with
respect to the present sea level, have been estimated at
plus as much as 81 m. (Cooke, 1945) and minus as much as
158 m. (Uchupi, 1967). An upper limit of plus 9 m. has been
proposed by the recent work of Alt and Brooks (1965). within

8
the past 6,000 years or so, Gulf sea level was as much as
5 m. lower than now and rose to the present level about
2,000 years ago (Gorsline, 1967). According to Rusnak
(1967) the present rate of sea level rise in the Gulf is
about 1.3 cm. per year.

The Gulf of Mexico now covers about 1,700,000 sq. km.,
and maximum depth is about 3,700 m. (Uchupi, 1967). The
coastline is about 8,000 km., and in the U. S. alone, the
tidal shoreline is at least 27,200 km. (Hedgpeth, 1953).
Gunter (1967) estimated that polyhaline bays between Corpus
Christ! , Texas, and Plorida Bay cover about 52,000 sq. km.
Most of that area can be included in 33 estuarine systems
that have an average area of about 1,430 sq. km. Along most
of the Gulf coast, the continental shelf slopes gradually
seaward and covers an additional shallow water area of
about 343,200 sq. km. (Carsey, 1950). Shelf width varies
from about 30 to 260 km., and breaks occur at the Yucatan
Strait where sill depth is about 2,100 m. and at the Florida
Strait where the sill is about 1,000 m. deep (Uchupi, 1967;
Armstrong, 1969; Jacobs and Ewing, 1969; Nowlin, 1971).

According to the coastal classification of Price (1954)
the southwestern Gulf has a segment of orogenic coast in
Mexico, and either alluvial or limestone coasts elsewhere.

9
Coasts of the alluvial type occur from northwestern Florida
to the Rio Grande and along the Mexican coast to Campeche.
The Florida and Yucatan peninsulas are limestone plateaus.

Currents and Circulation

Sea water enters the Gulf of Mexico from the Carib-
bean through the Yucatan Strait at a rate of about 25,000,000
m. /sec. as the Yucatan Current (Leipper, 1968). The cur-
rent extends from the surface down to the top of the sill,
and consists of several tropical components near the surface
and colder water masses below about 600 m. (McLellan and
Nowlin, 1963; Wust, 1964; Gordon, 1967; Nowlin, 1971).
These water masses flow from several areas of the Atlantic
and serve as the principal route for the introduction of
polychaetes to the Gulf from adjacent seas (Sverdrup, John-
son, Fleming, 1942; Thorson, 1961).

Much of the Yucatan Current leaves the Gulf directly
through the Florida Strait as the Florida Current (Parr,
1937). The remainder moves north and penetrates to a dis-
tance of 480 km. or more into the central and northern
Gulf (Drummond and Austin, 1958; Armstrong, 1967). The
northern movements of the Yucatan Current generate a well-
defined loop current in the eastern Gulf, which moves clock-
wise to the east and south before entering the Atlantic as

10
part of the Florida Current. Within the perimeter of this
system, there is a persistent eddy current about 160 km.
northeast of the Yucatan Channel and about the same dis-
tance south of Pensacola, Florida (Drummond and Austin,
1958; Drennan, 1963; Nowlin, Hubertz, and Reid, 1968;
Nowlin, 1971). The inshore currents in the eastern Gulf
consist of one or more eddies that flow between the loop
current and the Florida coast, and variable longshore
currents that are strongly Influenced by wind and tide
(Leipper, 1954; Lynch, 1954; Hela, 1956; Drummond and
Austin, 1958).

The offshore currents in the western Gulf also follow
a predominately clockwise direction, but the patterns are
poorly defined, especially in summer (Nowlin and McLellan,
1967; Jacobs and Ewing, 1969; Nowlin, 1971). Drift bottle
data, and other hydrological observations, indicate the
coastal currents in the western Gulf flow from the vicinity
of the Mississippi Delta toward the Mexican coast, es-
pecially between December and July (Leipper, 1954; Green-
man and LeBlanc, 1956; Drennan, 1963; Gaul and Boykin,
1965). At other times, the currents shift toward the east
and become part of the loop current (Drennan, 1963; Arm-
strong, Grady, and Stevenson, 1967).

11

Currents in Gulf estuaries are mostly tidal, and rarely
exceed 0.3 m./sec. except in narrows and offshore passes
where velocity may reach 3 m./sec. (Gorsline, 1967). The
relative strength of ebb and flow can often be deduced
from the observed direction of island or sand spit develop-
ment (Price, 1954).

Sediments

Widespread sedimentation in the Gulf of Mexico started
at the beginning of Laramide orogeny and continued through
the Tertiary and Quaternary to the present time (Rainwater,
1967 ) . The rate of sedimentation is now between two and
300 m. per 1,000 years, which produces an average subsidence
in the Gulf basin of about 0.5 m. per 1,000 years (Shepard,
1953; Ludwick, 1964; Rusnak, 1967)., High sedimentation
rates occur near the mouth of large rivers such as the Mis-
sissippi where over 700,000,000 metric tons of sediment are
deposited each year (Gunter, 1967). Lower rates of about
1 m. per 1,000 years are characteristic of semiarid lagoons,
and sediments in the deep water of the Gulf may accumulate
as slowly as 1 mm. or less per 1,000 years (Rusnak, 1967;
Pyle, 1968). In general, however, Rusnak (1967) stated
that the average rate of sedimentation is about equal to
the rate of sea level rise. In addition to recent alluvial

12
deposits, the Gulf also contains a large amount of modern,
bioclastic sediments that have been distributed by marine
transgressions in the past 17,000 years following the Wis-
consin glaciation (Greeman and LeBlanc, 1956; Curray, 1960;
Taft and Harbaugh, 1964).

From the vicinity of Carmen, on the Mexican coast,
around the northern Gulf and south to Cape Romano and the
northern part of the Ten Thousand Islands in Florida, near-
shore sediments are mostly quartz sand with an admixture
of silt and clay. Within this area, the greatest amount of
silt and clay occurs in sediments of the northern and west-
ern Gulf. Typically, these fine-grained materials are de-
posited nearshore. Farther from shore there is a transi-
tion to more sandy sediments and mixtures of sand and shell.
In the northern Gulf, the zone of fine-grained particles and
quartz sand extends offshore about 80 km. In the eastern
Gulf, however, the same zone has an average width of only
32 km. and is gradually replaced almost entirely by carbon-
ate sediments in the vicinity of Cape Romano, Florida (Gould
and Stewart, 1955; Jordan and Stewart, 1959; Storr, 1964;
Force, 1969). Somewhat south of Cape Romano and on the
Caropeche Bank of Mexico, sediments are mainly carbonaceous
and consist of marl or fragments of shell, coral, and coral-
line algae (Taft, 1961; Scholl, 1963; Scholl and Craighead,

13
1967). The zone of Inshore, terrigenous deposits corres-
ponds with the region of the Gulf that receives the great-
est volume of river discharge (Gould and Stewart, 1955;
McNulty, 1968).

Regardless of provenance, however, sediments in Gulf
estuaries are similar in a number of respects. These fea-
tures include stratification, sorting, particle size dis-
tribution, organic content, and carbon-nitrogen ratio.
Generally, there is little or no sediment stratification
because of the burrowing and mixing accomplished by poly-
chaetes and other benthic invertebrates. Sediment sorting
improves from bay heads to the Gulf and is directly related
to wave and current energy. Particle size increases toward
the Gulf but local anomalies occur in channels where parti-
cles are usually larger than average, or in deep depressions
where most particles are in the silt and clay range. Organic
content (weight percentage of carbon) may exceed 10 percent
in fine-grained deposits. The average value, however, is
usually between one and two percent, and regional trends
show higher values near bay heads and lower values near the
Gulf. The organic carbon content of estuarine sediments
comes almost entirely from vegetation so that the carbon-
nitrogen ratio is generally high (Lowman, 1951? Lynch, 1954;

14
Price, 1954; Gould and Stewart, 1955; Jordon and Stewart,
1959; Purl and Vernon, 1959; Curry, 1960; Shepard and
Moore, 1960; Goodell and Gorsline, 1961; Stewart and
Gorsline, 1962; Holmes and Evans, 1963; Kofoed and Gors-
line, 1963; Scholl, 1963; Ludwick, 1964; Goldsmith, 1966;
Huang, 1966; Gorsline, 1967; Palacas, 1967; Uchupl, 1967;
Bryant, Ewing, and Jones, 1968).

Climate. Hydrology, and Nutrients
The Gulf coast climate has been described by Hedgpeth
(1953) and meteorological conditions offshore were reviewed
by Leipper (1954). In the western and northwestern Gulf,
Hedgpeth (1953) recognized a temperate semiarid climate
which changes in order to temperate dry, and moist subhumid
climates to the east, and subtropical and tropical, moist,
subhumid climates on the southern half of peninsular Florida.
In comparison with the open Gulf, coastal waters are strong-
ly influenced by ambient weather in terms of a number of
factors that include temperature, salinity, turbidity, and
the concentrations of organic and inorganic nutrients. Tem-
perature more than any other factor is responsible for the
biotlc provinces in the Gulf (Hutchins, 1947; Pulley, 1952;
Hedgpeth, 1953; Humm, 1969). On the basis of temperature
and mollusk distribution. Pulley (1952) distinguished six

15
fauna! provinces for Gulf coastal waterB. Three of these,
south Florida, southwest Florida, and Mexican may also be
considered Caribbean — while the northeast Gulf, north-
west Gulf, and Texas Transitional may be regarded as
Carolinean (Hedgpeth, 1953). In deeper waters of the Gulf,
Parker (1960) and Rowe (1966) have shown that water tempera-
ture decreases with depth. This phenomenon creates vertical
provinces as well, which range from Caribbean or Carolinean
at the surface to Boreal at 2,000 fathoms and below.

Average winter water temperature in the southern Gulf
is about 23.9° C, and in the north it is about 18.3° C.
(Drummond and Austin, 1958). As a yearly average, tempera-
ture data from coastal recording stations around the Gulf
show a gradual decrease from south to north: Key West,
Florida, and Progresso, Mexico — 26.5° C; St. Petersburg,
Florida — 24.0° C> Pensacola, Florida, and Galveston,
Texas — 22.0° C. (0. S. Coast and Geodetic Survey, 1965).
It is important to note, however, that these average figures
are computed from temperatures that have a normal, yearly
range of about 15° C. and an extreme range that may exceed
30 C. In a three-year study of estuaries in the Florida
Everglades, Tabb, Dubrow, and Manning (1959) recorded a low,
winter water temperature of 14.4° c. and a summer high of

16

33.6° C. Seasonal, temperature ranges in the northern Gulf

o °
have been reported by Dawson (1955a) as 9.5 to 35.0 C,

o °
and by Curl (1959) as 14.0 to 30.1 C. "Northers," and

high summer air temperatures, cause even greater differences
in winter-summer water temperatures (0 to 44 C.) on the
Texas coast (Leipper, 1954; Breuer, 1957; Simmons, 1957;
Gunter, 1967). Little or no thermal stratification has been
reported for coastal waters of the Gulf, but tributary springs
and heated industrial waters create local temperature anom-
alies.

Isohalines for surface water in the Yucatan Current
range from about 35.7 to 36 parts per thousand, but lower
and higher values have been recorded from water masses at
greater depths (Drummond and Austin, 1958; Jacobs and Ewing,
1969). In the open Gulf, Williams (1954) reported 30 to 37
parts per thousand as a normal range for surface salinity,
and Curl (1959) arbitrarily selected 35 parts per thousand
as a means of identifying the dividing point between off-
shore water and coastal water. The width of the estuarine
zone varies with season and place, and depends mainly on
the flow of rivers and springs. Average discharge of fresh
water into the Gulf has been estimated at 25,000,000 liters
per second. About three-fourths of this volume comes from

17
the Mississippi River, and the rest comes mostly from
Florida and the Gulf states east of Corpus Christi, Texas
(Collier and Hedgpeth, 1950; Wilson, 1967). Cruise data
from the M/V Alaska show that the flow of fresh water from
the Mississippi River may reduce surface salinity to 26
parts per thousand at more than 96 km. from land (Drummond
and Austin, 1958). Curl (1959) found a similar, but less
pronounced, dilution in waters of the northeastern Gulf,
and reported a band of coastal water that extended eight to
48 km. from shore depending on the seasonal volume of fresh-
water runoff. In other areas of the Gulf, inshore waters
are often hypersaline rather than brackish. The most ex-
tensive belt of high salinity water lies along the Mexican
and Texas coasts in the Laguna Madre where Simmons (1957)
reported a datum of 113.9 parts per thousand. Abnormally
high salinity has also been reported for south Florida es-
tuaries during periods of drought and high evaporation
(Tabb, Dubrow, and Manning, 1959).

Turbidity in the Gulf is caused by land drainage and
other factors such as wind, water currents, and bottom type
(Breuer, 1962). On the west coast of Florida, clear water
occurs along the Keys but turbid conditions prevail over
the marl bottom in Florida Bay, and in the Ten Thousand

18
Islands where the water is stained by mangrove vegetation
(Tabb, Dubrow, and Manning, 1962). To the north, between
Cape Romano and Cedar Keys, estuarlne waters are moderately
clear. Farther north, and west to the Laguna Madre, the
only area of clear, coastal water occurs between Cape San
Bias and Pensacola, Florida (Gunter, 1967). According to
Breuer (1962) turbidity in the Laguna Madre is variable,
but the water is generally clearer than that of the north-
ern Gulf coast. From Tampico, Mexico, to the Campeche Bank,
the coastal water is very clear. Kornicker, Bonet, Cann,
and Hoskin (1959) reported that water in the vicinity of
Alacran Reef was sufficiently clear to see the bottom at
27 m.

Nutrient concentrations In the Gulf are almost entirely
related to coastal runoff as the mineral-rich layers of the
Yucatan Current are mostly directed toward the Florida Strait
(Rounsefell, 1954; Drummond and Austin, 1958; Corcoran
and Alexander, 1963). Therefore, most of the euphotic zone
in the open Gulf has low concentrations of phosphorus, nitro-
gen, and other growth-promoting elements. A few, exceptional
areas of high productivity in the Gulf of Mexico have been
reported by Bogdanov, Sokolov, and Khromov (1968). Surface
waters of many warm seas lack the nutrients necessary for

19

high, plankton production, and primary productivity in such

2
areas usually varies between 0.05 and 0.38 g.c/m. /day

(Ryther, 1963; Beers, Steven, and Lewis, 1968). Primary
production in the Gulf probably lies within that range. Near-
shore, however, nutrient concentrations and primary produc-
tion are higher. High, estuarlne production results from
mineral and organic enrichment through land drainage, intra-
estuarine nutrient cycling, tidal action, high solar insola-
tion, and the presence of a broad, shallow littoral zone that
supports a variety of photosynthetic taxa (Schelske and odum,
1962; Duke and Rice, 1967). Work in Gulf estuaries by Odum
(1957), Odum and Hoskin (1958) ,Pomeroy (1960), and others has
shown that gross primary production is on the order of 5 to
34 g.02/m. /day or roughly 2.5 to 17 g.C/m.2/day. Values
at the lower end of this range are probably the result of
low light transmission in areas of high turbidity (Odum and
Hoskin, 1958; Ragotzkie, 1959; Gunter, 1967). Added to
endogenous estuarine production, there is also an enormous
area of mangrove and marsh vegetation which contributes de-
tritus and soluble organic compounds to estuarine food webs
(Darnell, 1967; odum and de la Cruz, 1967; Stephens, 1966;

2
Net primary production is between 40 and 75 percent of
gross primary production (Nielsen, 1963; Ryther, 1963).

20

Zieman, 1968; Heald, 1969; Taylor, 1969). Gulf enrich-
ment by fresh-water drainage was first demonstrated by
Riley (1937) in a study of phosphate-phosphorus near the
mouth of the Mississippi River. His data for the delta
area and coast between central Louisiana and Mobile Bay
showed a maximum phosphate concentration of 16 mg./m. .
Offshore, the highest measurement was eight and the average
value was 3.8 mg./m. . In the western Gulf, Simmons (1957)
observed the same pattern of estuarlne enrichment in brack-
ish bays of the Texas coast. The most thorough study of
estuarine nutrification has been done in the eastern Gulf
in connection with work on red tides. A selection of sta-
tion data presented by Finucane and Dragovich (1959) illus-
trates the gradual decline of organic and inorganic nutrients
in an inshore-offshore direction (table 1). The concentra-
tion of phosphorus nearshore in Tampa Bay and Charlotte
Harbor is abnormally high due to the distribution of commer-
cial phosphate deposits in nearby areas (McNeil, 1950;
Dragovich, Kelly and Goodell, 1968).

21

Table 1. — Mean annual values for nitrite-nitrate nitrogen,
total phosphorus, copper, carbohydrate, and
protein from water inshore (IS) and offshore
(OS) at three points along the west coast of
Florida. Data from Finucane and Dragovich
(1959) — Tampa Bay stations 17 and 20; Char-
lotte Harbor stations 3 and 34; Everglades
stations 37 and 56

Factor

N02-N03
ug.at./l.

Cu

ug.at./l.

Carbohydrate,

Arabinose

equivalents

mg . /I .

Protein,
Tyrosine
equivalents

mg./l.

Stations

Tampa Bay Charlotte Everglades
Harbor

IS OS IS OS IS OS

1.1 0.8 2.5 0.5 1.8 0.5

Total Phosphorus 9.6 0.4 19.4 0.3 2.9 0.7
ug.at./l.

0.15 0.08 0.14 0.11 0.15 0.12

3.0 0.9 3.2 1.4 2.6 1.6

1.2 0.2 4.2 0.4 4.2 0.3

22

Emergent and Submergent Vegetation

Emergent vegetation along the Gulf coast between south-
ern Florida and Yucatan consists of four main associations
in biotopes that are variously influenced by exposure, drain-
age, coastal formation, and climate. The sand-strand asso-
ciation and those plants that occur on saline flats are found
recurrently along the entire coastline of the Gulf of Mexico.
Mangroves are confined by temperature to the southern Gulf
where they dominate the coast from Tampa Bay south and along
the Yucatan Peninsula. The black mangrove, Avicennia nitlda
Jacq. , has a more extensive range than either the red,
Rhizophora mangle L., or white mangrove, Laguncularla
racemosa (L.). It occurs in small stands as far north as
the Chandeleur Islands in Louisiana and along the Mexican
coast to the vicinity of the Rio Grande. North of the well-
developed mangrove forests, the predominant coastal vegeta-
tion consists of one or more species of Spartlna or the black
rush, Juncus roemerlanus Scheele (Price, 1954; Thome, 1954;
Moul and Brown, 1957).

Submerged vegetation includes seven species of sea
grasses and many kinds of algae. Among the sea grasses,
two are commonly found in water of low salinity — horned
pondweed, Zanichellia palustris L., and widgeon grass, Ruppla

23

marltima L. The other five occur mostly In normal or hyper-
saline habitats: turtle grass, Thalassia testudinum Konlg;
manatee grass, Syringodlum filiforme Kutzing; shoal weed,
Diplanthera wrightll (Ascherson) ; Halophlla balllonis Ascher-
son; and Halophlla engelmanli Ascherson (Thome, 1954; Humm,
1956). Turtle grass is the most widespread sea grass in the
Gulf, but on the basis of scattered collection records it
seems likely that all or most of the other species are also
distributed throughout the Gulf wherever light and bottom con-
ditions are favorable (Humm, 1956; Kornicker, Bonet, Cann,
and Hoskin, 1959; Phillips, 1960; Breuer, 1962; Tabb,
Dubrow, and Manning, 1962; Gunter, 1967). Near Tortugas,
Florida, Thome (1954) commented on a collection of H.
engelmanli from an estimated depth of 91 m., and stated
that he knew of no sea grass collections from deeper than
100 m.

A rich algal flora is associated with sea grasses (Humm,
1964) and a large number of species attach to limestone out-
crops, beach rock, serpuloid reefs, old coral heads, coastal
vegetation, and a variety of man-made structures. Further-
more, a few species are adapted by a prodigious system of
stems to growth on unconsolidated sediments. Recent work
on the taxonomy, ecology, and biogeography of the Gulf algae

24
includes reports by Taylor (1960), Humm and Taylor (1961),
Taylor (1965), Dawes (1967), and Humm (1969).

Animal Assemblages

Hedgpeth (1954) and others summarized available informa-
tion on animal communities in the Gulf, and presented species
lists, ecological data, and biogeographic annotations for
many invertebrate and vertebrate groups. The major bottom
communities that he recognized were: oyster bottom, shrimp
ground, coral bottom, sponge bar, serpuloid reef, jetty, and
sand beach. Drawing from an earlier paper by Ladd (1951)
Hedgpeth also listed nine marine environments based on
salinity and mollusk distribution. These were: bay head,
inter-reef (oyster), reef (oyster), polyhaline bay, passes,
open Gulf nearshore and offshore, beach, and hypersaline
lagoon. Information on the deep water fauna of the Gulf
was limited at that time to reports from cruises of the
Blake and Albatross between 1877 and 1883.

Later reports on invertebrate assemblages in the
northern Gulf described as many as 11 environmental facies
for estuarine waters and eight for the continental shelf
and slope (Parker, I960; Phleger, 1960). The dominant
fishes and macroinvertebrate assemblages in estuarine sys-
tems from Texas to western Florida were studied by a number

25
of authors including Reid (1955a, 1955b); Wurtz and Roback
(1955); Breuer (1957, 1962); Siirations (1957); Darnell
(1958); Arnold, wheeler, and Baxter (1960); Gunter (1962,
1967); Hoese and Jones (1963); and Perret (1966). For
the eastern Gulf, principal studies include papers by Reid
(1954); Springer and Woodburn (1960); Springer and McErlean
(1962); Scholl (1963); Sykes and Finucane (1966); Gunter
and Hall (1965); and Tabb, Dubrow, and Manning (1962). By
including Biscayne Bay, Florida, as an area adjacent to the
Gulf, mention may also be made of the series of benthic in-
vestigations by McNulty and colleagues that date back to
the 1950s (McNulty, 1966) and the studies on intertidal
communities by O'Gower and Wacasey (1967) and Moore, Davles,
Fraser, Gore, and Lopez (1968).

Recent information on the offshore fauna is available
in several additional references. The most extensive col-
lections came from exploratory fishing cruises conducted by
the National Marine Fisheries Service (Bullis and Thompson,
1965). Intensive regional studies have been made by Hilde-
brand (1954, 1955) and Rowe (1966) in the western Gulf, and
by Storr (1964) and Joyce (1968) in the eastern sector.

The first written reports on Tampa Bay and its marine
life came from observations by the early Spanish explorers.

26
Navaez and DeSoto, in the early 1500s (Galtsoff, 1954).
Their comments were of a general nature and described the
more common fish and shellfish eaten by Indians (Shlpp, 1881).

In addition to the littoral, polychaete aggregations
reported by Hartman (1951) other papers include (1) species
from the Mexican coast, Rio ja (1946, 1961), — (2) species
annotated by Behre (1950) from Louisiana, (3) those in the
museum report compiled by Dawson (1955b) for coastal Missis-
sippi, (4) species in Menzel's (1956) checklist for north
Florida, (5) worms found by Carpenter (1956) in Alligator
Harbor, Florida, from nine habitats, (6) annelids collected
by Taylor (1961) in 10 habitats, (7) those commonly found in
Biscayne Bay, Florida, on level bottom and intertidal bottoms
that are either vegetated or unvegetated (McNulty, 1966;
O'Gower and Wacasey, 1967; Moore, Davies, Fraser, Gore,
and Lopez, 1968), — (8) worms that are found in and on
coral in the south Florida reef patches (Ebbs, 1966) and
(9) polychaetes found in sponges (Pearse, 1934).

Elsewhere on the Florida coasts, polychaetes have been
studied by Ehlers (1887); Ashworth (1910); Treadwell (1911,
1914, 1917, 1921, 1929); Hoagland (1919); Monro (1933) Hart-
man (1938, 1939, 1940, 1941, 1942a, 1942b, 1944a, 1944b,
1947a, 1947b, 1949, 1950, 1952, 1954, 1956, 1957, 1958,

27
1959a, 1959b, 1965, 1968, 1969); Stephenson and Stephenson
(1950, 1952); Voss and Voss (1955); Pettibone (1956, 1961,
1963a, 1963b, 1965, 1966); Renaud (1956); Jones (1961,
1963); McNulty (1961); Paine (1961, 1963); Tabb and
Manning (1961); McNulty, Work, and Moore (1962); Mangum
(1962, 1964); Tabb, Dubrow, and Manning (1962); Wells (1962) j
Robertson (1963); Ebbs (1964); Ebbs and Staiger (1965);
Fitzsimons (1965); Wells (1965); Bush (1966); Multer and
Millinian (1967); Joyce (1968); Kirtley (1968); Mangum,
Santos, and Rhodes (1968); Naqvi (1968); Heald (1969); and
McNulty and Lopez (1969).

One of the earliest, if not the first, collection of
polychaetes in Tampa Bay was made by Eisenberg in 1856
(Wells, 1962). His collection contained a large number of
Arenicola crlstata that are now housed at the Museum of
Comparative Zoology. Later records are limited to work by
Pettibone (1957); Dragovich and Kelly (1964); Simon (1965);
Taylor (1966, 1968); Kelly and Dragovich (1967); and Taylor
and Saloman (1968). Only six species and some ecological
observations were noted in these papers.

Human Influence
Plant and animal communities in the Gulf are probably
as productive as those in any other area of the world. Be-
fore the recent impact of civilization, mortality from

28
environmental change was limited to natural phenomena such
as hurricanes, severe cold fronts, red tide, and "Jubilees"
(oxygen depletion — Gunter, 1967).

Along much of the Gulf coast, the estuarine environment
has been modified by man. These changes are caused by do-
mestic and industrial wastes, biocides, siltation, radio-
active wastes, crude oil and chemical spills, exotic species,
and human predation; as well as many types of coastal con-
struction for water diversion, storm protection, navigation,
beach reclamation, and land fills (U. S. Public Health Serv-
ice, 1954; Biglane and LaFleur, 1967; Cronin, 1967; Butler,
1969; Holt, 1969; Hopkins, 1969; Copeland, 1970). Most
of these modifications occurred after 1940 when many coastal
areas began to develop at an unprecedented rate. The magni-
tude and significance of human influence on Gulf estuaries
is presently undergoing review by the National Marine Fisher-
ies Service and cooperating Gulf states. The project is en-
titled, "Gulf of Mexico Estuarine Inventory." This monumen-
tal study shows the extent of coastal development around the
Gulf and describes the present condition of nearshore waters,
sediments, and biota.

On the basis of data from this inventory, Sykes (1967)
estimated that four percent, or about 218,000 ha., of Gulf

29
estuaries, are already seriously polluted or entirely
eliminated as area for useful biological production. His
figures show that most of the damage has occurred in Florida
where some 158,000 ha. were polluted, or filled for residen-
tial and industrial sites. As a specific example of estuarine
destruction he cited Boca Ciega Bay (Tampa Bay Estuary) where
land fills have covered nearly 20 percent of the original
water area. Within the same Estuary, there are also areas
that receive a large volume of domestic and industrial waste,
and other areas that are relatively undisturbed.

The presence of natural and modified environments in
Tampa Bay provided an opportunity to report additional in-
formation on the diversity, abundance, and distribution of
Gulf polychaetes; and to compare the polychaete fauna of
natural, undisturbed areas with those that have been altered
in various ways by man. The use of polychaetes as indica-
tors of environmental change has great relevance in the
Tampa Bay area where the economy is based on retirement
living, tourism,, recreation and water resources.

CHAPTER 3
TAMPA BAY ESTUARY

In Miocene and Pliocene time Tampa Bay and southern
Florida were under the sea. The headlands that now mark
the Estuary were no more than submerged features of the
Florida Plateau (Cooke, 1945; Alt and Brooks, 1965). The
modern relief of Tampa Bay did not take shape until Pleisto-
cene time when great fluctuations of sea level caused re-
current periods of erosion and sedimentation. According
to Gorsllne (1967) the last major period of erosion on the
Florida Plateau occurred about 17,000 years ago when the
Gulf was 100 m. lower than now. Thereafter, rising water
brought the Gulf to its present height about 2,000 years
ago, and the level has changed little since that time.

Location and Configuration
Tampa Bay is located midway along the west coast of

Florida between north latitude 27°31'4" and 28 02 '3", and

o o

west longitude 81 23 '2" and 82 50' 0" (figure 1). The shore-
line is approximately 320 km. and surface area is about 905

30

31
sq. km. The main axis of the Estuary lies northeast-south-
west and extends nearly 63 km. Maximum width is 40 km.
near the mouth of the Estuary between the narrows in upper
Boca Ciega Bay and Sarasota Pass (Olson and Morrill, 1955).

On the basis of hydrology and geography, the Estuary
can be divided into six areas. Tampa Bay extends from the
Gulf, between Mullet and Anna Maria Keys, landward to Inter-
bay Peninsula. It is divided by a hypothetical line between
Pinellas Point and Piney Point into upper and lower Tampa
Bay. A third area, Boca Ciega Bay, lies north of Tampa Bay
entrance, and a fourth. Terra Ceia Bay, is on the opposite
side. A fifth area, Old Tampa Bay, is located on the west
side of Interbay Peninsula, and the sixth area, Hillsborough
Bay, lies on the east side of the Peninsula (figure 1). In
terms of surface area, the upper and lower parts of Tampa
Bay comprise about 57 percent of the Estuary, Boca Ciega
Bay eight percent. Terra Ceia Bay three percent. Old Tampa
Bay 22 percent, and Hillsborough Bay 10 percent.

Passes to the Gulf run between a series of barrier is-
lands located along the seaward side of the Estuary. From
Anna Maria Key north, the main passes are Passage Key Inlet,
Southwest Channel, Egmont Channel, Bunces Pass, Pass-a-Grille
Channel, Blind Pass, and Johns Pass. The islands are built

Figure 1.— Tampa Bay Estuary shoving transect nd lettered stations (solid circles) in the benthic survey of 19&3, and biomass stations f :.olid triansles) sampled between 1963 and I969.
Solid lines shov county boundaries, dotted liti. indicates main ship channels, and dashed lines delineate major areas of the Estuary. Sm 1 islands and spoil banks are shown in black.

33
and shaped by tidal action, and by waves and longshore
currents. Coastal currents north of Tampa Bay entrance
have a net, southerly flow, and south of the entrance in-
shore currents have a predominantly northward drift. In
passes, currents run slightly faster at ebb than at flood
tide (Goodell and Gorsline, 1961).

Average depth of the Estuary is about 3.3 m. and prac-
tically all water deeper than 5m. is in upper and lower
Tampa Bay. The deepest water (12 m.) is just south of
Mullet Key in Egmont Channel. Dredged, ship channels from
the Gulf to ports in Tampa Bay, Old Tampa Bay, and Hills-
borough Bay have a controlling depth of about 9m. By
area, average depths in the Estuary are as follows: lower
and upper Tampa Bay, 4.3 m.,- Boca Ciega Bay, 1.5 m.; Terra
Ceia Bay, 1.5 m.; Old Tampa Bay, 2.7 m.; Hillsborough Bay,
3.1 m. Topographic zones in the Estuary include shallow
tidal flats with an average depth of 1.2 m., slopes that
drop from the flats to about 5.4 m., and natural depressions

and channels that are 6m. or deeper. Total volume of the

/
Estuary at mean, low water (MLW) is about 0.687 cubic miles

(Olson and Morrill, 1955; Goodell and Gorsline, 1961 ; U. S.

Coast and Geodetic Survey Navigation Charts 586 and 587).

Offshore, the continental shelf is 192 km. wide. Depth

34

increases by 0.8 m. per mile (1.6 km.) to the 63 m. con-
tour, and 3 m. per mile from there to the 180 m. mark.
At the outer limit of the shelf, there is a sharp dip,
and the angle of the continental slope is about 39 between
a depth of 1,800 and 2,700 m. (Gould and Stewart, 1955).

Climate and Tributary Waters
The Estuary and surrounding upland has an humid, sub-
tropical climate. Average air temperature in St. Peters-
burg during 1963 was 22° C. and mean temperature of the
coldest and warmest months was 12 and 28 C. (U. S. Dept.
of Commerce, Climatological Data, Florida, 1963). Rainfall
is about 127 cm. per year, and records show that annual pre-
cipitation varies between 72.5 and 192.5 cm. (U. S. Dept. of
Commerce, Climatological Data, Florida, 1967). The rainfall
is seasonal, and more than half usually falls between June
and October (Dragovich and May, 1962). Much of the rain
comes from localized electrical storms so that precipitation
is not evenly distributed over the entire watershed. For
example, in 1963, St. Petersburg and Bradenton received about
153 cm. of rain but only 109 cm. fell on Tampa. Evapora-
tion usually equals or exceeds precipitation. In 1963, it
was recorded as 170.13 cm. at a gauging station near Tampa
(U. S. Dept. of Commerce, Climatological Data, Florida, 1964).

35
Prevailing winds over the Estuary are easterly at an average
speed of 3.7 m./sec, there are only 40 to 80 days of cloud
cover each year, and the sun usually shines more than six
hours per day (Trewartha, 1943; Hutton, Eldred, Woodburn,
and Ingle, 1956) . In 1963, wind direction and cloud cover
were normal, but wind velocity was considerably higher than
average (5.9 m./sec.) — (U. S. Dept. of Commerce, Climato-
logical Data, Florida, 1963).

The watershed drained by the Estuary covers an area
of about 5,600 sq. km. and contains a number of rivers,
streams, and springs. The rivers all flow into the east-
ern side of the Estuary and are named Hillsborough, Palm,
Alafia, Little Manatee, and Manatee (Ferguson, Linghan,
Love, and Vernon, 1947). Many of the charted creeks and
bayous are entirely tidal and have no fresh water source.
Gauge records show that fresh water flow into the Estuary
is 1,567.5 cubic feet per second (cfs) or 44,260 liters per
second, and the total flow from all natural sources is
probably close to 2,000 cfs (56,600 liters per second).
Using 56,600 liters per second as an approximate figure,
the daily fresh water flow into the Estuary is about 4.9
billion liters per day. Total fresh water input from all

33602.

3
Data on file U. S. Geological Survey, Tampa, Florida,

36
sources should include domestic and industrial sewage which
has a volume of 347,000,000 liters per day. By areas, sew-
age volume figures in million of liters per day are as
follows: lower and upper Tampa Bay, 88; Boca Ciega Bay,
85; Terra Ceia Bay, negligible; Old Tampa Bay, 10; and
Hillsborough Bay 164. Thus the grand total of fresh water
entering the Estuary is about five billion liters per day
with sewage volume amounting to more than six percent of
that figure.

Coastal Development
In the tri-county region surrounding Tampa Bay there
is a resident population of over 1,120,000 people. The
largest number of people live in Pinellas County (527,920)
which is the most densely populated county in Florida. The
population of Hillsborough County is 505,755, and that of
Manatee County is 86,500. Centers of population are the
cities of St. Petersburg, Clearwater,_Tampa, Palmetto, and
Bradenton. Automobile travel around and between these cities
is facilitated by a causeway and two bridges over Old Tampa
Bay, a bridge over upper Hillsborough Bay, several bridges
and causeways between the mainland and the barrier islands
across Boca Ciega Bay, and the Sunshine Skyway near the
mouth of the Estuary that connects St. Petersburg and Terra
Ceia.

37
Regional commerce includes fisheries, agriculture, food
processing, wholesale and retail merchandising, tobacco,
electronics and other light industry, chemical production
and heavy industry, shipping, air and rail transport, public
utilities, and building construction. Tourism, however, is
the most important component of the economy in the Tampa
Bay area. Figures from the Florida Development Commission
show that 3,000,000 tourists visit the Bay each year. They
stay for an average vacation of 15 days and have a per capita
expenditure of 274 dollars. Thus, the total yearly value of
tourism is 622,000,000 dollars. The main tourist attraction
is Tampa Bay Estuary and the recreation it provides (Kidd,
1963) .

Development in Boca Ciega Bay is largely for homesites
and tourist accomodations. Pollutants include sewage and
a large volume of silt and clay that was deposited during
dredge-fill projects. Land fills and construction of the
Pinellas County Bayway have eliminated most coastal vegeta-
tion and drastically changed current patterns. The only
remaining natural shoreline is around islands east and
west of Tierra Verde and at Fort DeSoto Park (Mullet Key)
where vegetation consists of mangroves, a variety of strand
species, and cord grass.

38
In lower and upper Tampa Bay, there is practically no
natural shore in Pinellas County, and the shore in Manatee
County is being rapidly developed for homesites, tourism,
industry, and shipping. At present, the volume of sewage
and degree of coastal development is far greater in Pinellas
County. The Manatee side of the Bay has some extensive
stands of mangrove, but construction at Apollo Beach and
Piney Point make their future uncertain. Egmont Key, at
the mouth of Tampa Bay, is relatively undisturbed and has
only a small boat pilot community and a U. S. Coast Guard
facility to maintain Egmont Light.

In Old Tampa Bay, about two-thirds of the coast is un-
developed and supports a mixed growth of mangrove, cord
grass, and black rush. Tidal flow in upper Old Tampa Bay
is interrupted by Courtney Campbell Parkway. Sewage is the
principal pollutant there, and the major portion of resi-
dential and industrial development is in Hillsborough County
between the eastern end of W. Howard Frankland bridge and
the phosphate docks at Port Tampa.

The entire perimeter of Hillsborough Bay is developed
and partially filled. McDill Air Force Base covers the
southern end of Interbay Peninsula, and from there to the
Alafia River there is a solid front of housing, dock facil-
ities, and heavy industry. Large sewage outfalls enter the

39
Bay at McDill (secondary treatment) and at Hooker Point
(primary treatment) .

Terra Ceia Bay has some waterfront homesites and
marinas, and is polluted to a small degree from sewage
carried by the Manatee River. Most of the shoreline is
covered with mangroves and an interesting admixture of
tropical species.

Hydrology

From a hydrological standpoint, Tampa Bay Estuary is
one of the best known embayments in the world. Its water
chemistry has been studied periodically since 1946, mainly
in connection with investigations of the Florida red tide
organism, Gymnodinium breve (Williams, 1954) . In their
literature survey of the Estuary, Olson and Morrill (1955)
summarized existing information on water temperature, salin-
ity, water transparency, currents, and tides. The National
Marine Fisheries Service increased the scope and frequency
of water sampling in 1957, and in 1966, the laboratory at
St. Petersburg Beach established 30 permanent hydrographic
stations. At a station at the laboratory dock on Boca Ciega
Bay water is sampled twice each day, and water at the other
stations is sampled on a monthly schedule. Also, daily water
temperature and salinity measurements are recorded at the
U. S. Coast Guard Station on Egmont Key. Factors recorded

40
by the Fisheries Service include water temperature, salinity,
pH, total phosphorus, Kjeldahl nitrogen, dissolved oxygen,
water turbidity and transparency, chlorophyll pigments, as-
tacin and non-astacin carotenoids, planktonic primary pro-
duction, and ultraviolet absorption (Saloman and Taylor,
1968). The mean and range of these factors for 1963 and
the most recent year of record (1967) have been summarized
(table 2).
Temperature

The mean, annual temperature of Tampa Bay is about
25° C. Normally, water temperature reaches 20 C. by April,
and 30° C. in July. It drops to 20° Cor below in November,
and falls to between 10 and 15° C. during winter months.
Temperature fluctuations are usually gradual, but pro-
nounced diel changes have been observed in shallow water.
For example, following a cold front in February, 1966, I

recorded a datum of 4.8° C.near shore at Mullet Key where

o
the normal temperature for that month is about 15 C. At

other times, rapid temperature depression in the Estuary

has caused extensive fish mortality (Rinckey and Saloman,

1964) . The highest temperature recorded in the Estuary

(36.9°G) was reported from a tidal flat in Boca Ciega Bay

in July (Phillips, 1960). In 1963, average water tempera-

o
ture in the six major areas of Tampa Bay Estuary was 27.9 C.

41

and the observed extremes were 11.7 and 36.8° C.

Over broad areas marked by degrees of latitude, water
temperature is probably the most important ecological
factor that limits the distribution of marine animals.
Temperature acts through its influences on metabolic
processes and generally restricts the range of littoral
species to one or another biogeographic zone or province
(Hedgpeth, 1953, 1957; Moore, 1958). On the basis of
mollusk distribution, Pulley (1952) erected the Southwest
Florida Province which includes Tampa Bay Estuary and runs
from Cape Romano to Anclote Key. For this zone he reported
a mean, maximum summer temperature of 32° C. and a mean, mini-
mum winter temperature of 16° C. Following the thesis of
Hutchins (1947) and others, he attributed the great species
diversity within that area to the fact that the average tem-
perature regime permits reproduction and survival of species
from both the Carolinian and West Indian Provinces.
Salinity

The salinity of Tampa Bay Estuary is between the con-
centration of fresh water (0.5 parts per thousand or less)
and that of sea water (33 to 37 parts per thousand). There
are no hypersaline areas in the Estuary, but in Hillsborough
Bay there is an extensive deposit of gypsum (hydrated calcium

42
sulphate) adjacent to spoil deposited from the phosphate
industry near the Alafia River.

At the entrance of the Estuary, salinity is usually
greater than 30 parts per thousand, and may reach 36 parts
per thousand or higher. The salinity gradient from lower
Tampa Bay to the head of the Estuary is about 10 to 12
parts per thousand. Dams limit brackish-water to the mouth
of the Hillsborough and Alafia Rivers, but in other tribu-
taries, salt-water extends well upstream. Vertical salin-
ity gradients in the Estuary are uncommon. The greatest
observed difference in salt content between surface and
bottom water (1.4 to 20.5 parts per thousand) was recorded
at the east end of Cross Bayou Canal in Old Tampa Bay on
January 13, 1963 (Finucane and Dragovich, 1966) .

Diel and seasonal salinity changes in the Estuary are
small. Hillsborough Bay is the only area where rainfall
strongly influences salinity. There, drainage from the
Hillsborough and Alafia Rivers between June and October
may reduce salinity 6 to 7 parts per thousand (Saloman and
Taylor, 1968) . At sampling stations visited in 1963, salin-
ity records were between 0.1 and 36.4 parts per thousand.

Next to temperature, salinity is probably the most
important hydrological factor limiting the distribution of
species in Tampa Bay. For most marine and fresh-water

43

species, intermediate salinities impose a physiological
barrier to estuarine migrations. Consequently, the middle
and upper reaches of brackish estuaries are inhabited by
euryhaline species and holeuryhaline forms (Pearse and
Gunter, 1957; Kinne, 1964).

Many polychaetes are well adapted to severe salinity
changes. Some of the nereids, for example, survive water
conditions that range from hypersaline to fresh through
their ability to regulate water and ions against a consider-
able concentration gradient (Oglesby, 1968) . Other worms
have a limited ability to regulate or adjust in response
to salinity changes, and some avoid temporary osmotic stress
by retreating into burrows or tubes.
Hydrogen Ion Concentration

In most estuarine and marine habitats, pH is 7.0 or
greater due to high concentrations of bicarbonate, carbon-
ate, and borate ions (Nicol, 1960; Reid, 1961; Skirrow,
1965). Average pH for all areas of Tampa Bay in 1963 was

7.8 and the extreme values recorded that year were 5.6 and

4
8.5 units. Unpublished data from diel studies between

1962 and 1963 show that changes in pH are seldom more than

4
Data on file National Marine Fisheries Service Bio-
logical Laboratory, St. Petersburg Beach, Florida, 33706.

44
1.5 unit over a 24-hour period, in tidal creeks, and sedi-
ments beneath mangroves, Goodell and Gorsline (1961) re-
ported 6.8 as the observed, minimum pH. Humic acids and
highly organic sediments are responsible for low pH values
in such areas. In general, pH values in the Estuary are
7.0 or less in tributary waters, and 7.1 or above elsewhere.

Dissolved Oxygen (DO)

4
On the basis of daylight and diel records, DO of

surface water in the Estuary seldom drops below 4 ml./l.
The average concentration in 1963 was 4.8 ml./l., which
represents oxygen saturation or super-saturation at ob-
served ranges of temperature and salinity. High and low
DO values for 1963 were 9.0 and 1.1 ml./l., respectively.
Values near 9 ml./l. usually coincided with periods of high
photosynthetic activity and low values were invariably re-
corded in early morning hours. DO values below 2 ml./l.
are limiting to many marine animals, especially when an
oxygen deficiency persists for protracted periods (Emery
and Stevenson, 1957; Moore, 1958).

At the bottom of the Estuary, DO is more variable and
there are records of anoxic conditions over soft sediments
in Boca Ciega and Hillsborough Bays (Dragovich, Kelly, and
Finucane, 1966; Saloman, Finucane, and Kelly, 1964). More

45
recent data (Federal Water Pollution Control Administration,
1969) show that in summer months there is little or no oxy-
gen at the bottom over large sections of Hillsborough Bay-
covered by sewage sludge. Low DO in Boca Ciega Bay is
limited to bayfill access canals where soft, organically
rich deposits are as much as 4 m. thick (Taylor and Saloman,
1968).

In their study of the main tributaries of the Estuary,
Dragovlch, Kelly, and Goodell (1968), found that DO values
of less than 50 percent saturation occurred in one-fifth
of their samples. As in Hillsborough and Boca Ciega Bays,
low DO in the Hillsborough, Alafla, and Manatee Rivers is
due to biochemical oxygen demand (BOD) caused by organic
pollution.
Nitrogen and Phosphorus

A data summary for nitrogen and phosphorus in Tampa
Bay, prepared by Taylor and Saloman (1968), shows a history
of progressive nutrient enrichment since 1952. Large amounts
of both nutrients reach the Estuary from land drainage and
sewage. Additional phosphorus enters the Bay from mining
operations in extensive phosphatic deposits north and east
of the Estuary. Dragovich, Kelly, and Goodell (1968) cal-
culated that river discharge adds at least 600,000 kg. of
phosphorus to the Estuary each year. According to the

46
U. S. Geological Survey (1969) approximately 45,000 kg. of
orthophosohate pass each day from Tampa Bay into the Gulf
of Mexico. As sewacre volume -in the Bay increases, the
ratio of nitrogen to phosphorus will probably rise because
the effluent from sewage receiving secondary treatment has
a nitrogen-phosphorus ratio of about., three to one (Garber,
1959) .

The fertilizing effects of nitrogen and phosphorus on
algae have been more noticeable in Hillsborough Bay than
in other areas of the Estuary. There, excessive growth
of attached algae and phytoplankton has had undesirable
consequences (Dragovich, Kelly, and Kelly, 1965; Federal
Water Pollution Control Administration, 1969). During hours
of low light intensity, these plants deplete DO and cause
widespread fish-kills. Furthermore, the seasonal demise
and decomposition of the algae is the primary cause of an
objectionable odor along shore.
Primary Productivity

The study of primary production in Tampa Bay was started
by Pomeroy (1960). His work was limited to Boca Ciega Bay
where he found that phytoplankton, benthic algae, and sea
grasses all contributed about equally to production at
depths of 2 m. or less. In deeper water, however, he showed
that the abundance of sea grasses and benthic algae declines.

47

and phytoplankton become the only important producers. As

an average, he reported gross primary production of the

2
plant community at about 5 g.0,/m. /day. That figure is

roughly equal to 5 g. of organic matter per day (Odum and

Hoskin, 1958) or about 2.5 g.C/m.2/day (Yentsch, 1963; May,

1966) . Thus, each of the three types of producers (sea

grasses, benthic algae, and phytoplankton) contributed

2
about 0.6 g.C/m. /day.

In 1962, productivity studies were added to the National
Marine Fisheries Service program, and regular sampling be-
gan in representative areas of Tampa Bay. Plant pigments,
and the light-dark bottle method were used and results were
nearly equal (May, 1966) . No attempt was made to measure
production by benthic algae or sea grasses. In the years

1962 and 1963, the average production by phytoplankton for

2
the entire Estuary was 1.2 g.C./m. /day, and since that

time the average figure has not changed appreciably (May,

1966; McNulty, 1969).

By season, productivity in the Estuary follows a

fairly uniform pattern. Lowest production occurs in winter,

intermediate levels are observed in spring and fall, and

peak production is in July, August, and September (McNulty,

1968) .

48
From the standpoint of areas, the nutrient-rich waters
of Hillsborough Bay have the highest production, followed
in descending order by Old Tampa Bay, upper Tampa Bay, Boca
Ciega Bay, Terra Ceia Bay, and lower Tampa Bay. Offshore

in the Gulf of Mexico primary production drops to an aver-

o
age value of less than 0.01 g.C/m. /day and the amount of

chlorophyll is about one-fourth the average concentration
in the Estuary (Dragovich and Johnson, 1966).

In comparison with other estuaries where productivity
has been studied, primary production in Tampa Bay is high,
and the amount of chlorophyll A present is nearly twice
the average found in temperate coastal waters (Nielsen,
1963; Ryther, 1963; Yentsch, 1963; McNulty, 1969; Strick-
land, 1965).

Water Clarity

5
A Hach turbidity meter, photometer, and Secchi disc

have been used to measure water clarity in Tampa Bay Es-
tuary (Dragovich, Kelly, and Finucane, 1966; Saloman and
Taylor, 1968; Saloman and Taylor, 1971). The Secchi disc
was used only at the laboratory dock in Boca Ciega Bay,
and the other instruments were used throughout the Estuary.

5
References to trade names in this publication do not
imply endorsement of commercial products.

49
Average values, based on readings from the turbidity meter
and photometer, show that the greatest amount of turbidity
occurs in Hillsborough Bay. A number of factors contri-
bute to the relatively high turbidity observed in that
area. A natural cause is the great quantity of humic acids
that enter the Bay from river flow. Human activities that
cause turbidity in Hillsborough Bay include shell dredging,
ship traffic, and the introduction of large amounts of sew-
age and industrial wastes.

Turbidity in Florida waters cannot legally exceed 50
Jackson Turbidity Units (JTU) above background level (Sup-
plement 52 to chapter 28.5 of the Rules of the Florida Air
and Water Pollution Control Commission) . Average back-
ground for all areas of the Estuary is about 7 JTU (table
2). in terms of visibility, a Secchi disc disappears from
view at 110 to 120 cm. when turbidity is 7 JTU. This amount
of turbidity probably reduces planktonic primary production
to some extent and limits benthic algae and sea grasses to
a depth of about 2 m. or less (Phillips, 1960). At a per-
missible turbidity level of 50 to 60 JTU, visibility would
decrease to between 20 and 25 cm., and most primary pro-
duction would be eliminated (Ragotzkie, 1959).

In some naturally turbid estuaries, low primary pro-
duction is replaced by allochthonous organic detritus from

50

coastal vegetation (Odum and de la Cruz, 1967). in the same
way, suspended and dissolved organic material from sewage
may be a potential food source for estuarine organisms.
Unfortunately, effluents from most coastal development con-
tain a mixture of industrial and domestic wastes. As a re-
sult, there are great quantitative and qualitative differences
between natural nutrients and those that originate directly
or indirectly from the discharge of sewage. The importance
of such differences, and the possibility of toxic compounds
in sewage, determines whether or not sewage pollution may be
beneficial or detrimental to a stable and productive estuarine
ecosystem (Rounsefell, 1963; Copeland and Wohlschlag, 1968).
In Hillsborough Bay, there is evidence from biological
and hydrological studies that the effects of pollution have
been mostly undesirable (Sykes and Finucane, 1966; Taylor
and Saloman, 1963; Taylor, Hall, and Saloman, 1970; Federal
Water Pollution Control Administration, 1969).
Ultraviolet Absorption (UV)

An estimate can be obtained of the organic content of
water from measurement of UV absorption at 220 mu. As a
rule, absorbency increases from the open sea toward shore.
Relatively high values near land are accentuated after pe-
riods of high land drainage and near sources of organic pol-
lution (Armstrong and Boalch, 1961; Sournla, 1965).

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57
Study of UV absorbency in Tampa Bay Estuary was started
by the National Marine Fisheries Service in 1963 with the
idea that a rise in UV absorbency might directly correlate
with plankton blooms — especially outbreaks of the Florida
red tide organism, Gvmnodinlum breve (McNulty, 1969). On
several occasions, blooms have been recorded at times of
high UV absorbency, but not always. As one might expect,
average values of UV absorbency are highest in the nutrient-
rich areas of the Estuary (table 2). This concordance is
noted only as a point of interest for the relationship be-
tween UV absorbency and faunal abundance is unknown.
Tides and Currents

Tides in Tampa Bay Estuary have been classified as mixed-
semidiurnal; i.e., there are usually two high and two low
tides each day, but the levels of successive high and low
water periods are seldom equal. Tidal range is normally
less than 1 m., unless influenced by strong winds. Winds
from the southwest tend to elevate tides and hold water in
the Estuary while northeast winds have the opposite effect.
Hurricane tides of 3 m. above normal have been recorded
(Manner, 1954; Olson and Morrill, 1955).

Currents in the Estuary are mainly generated by tidal
action and have an average velocity of about 0.3 m./sec.

58
Flow rates of up to 1.3 m./sec. have been measured In the
narrows between Old Tampa Bay and upper Tampa Bay, at the
end of bridge abutments, and In passes leading to the Gulf.
There is very sluggish water movement in Hillsborough Bay,
and evidence of a large eddy east of St. Petersburg (Olson
and Morrill, 1955; Taylor and Saloman, 1969).

Submerged Vegetation

Aerial observations, photographs, and planimeter mea-
surements show that 8,500 ha. or nearly 10 percent of
Tampa Bay Estuary contains sea grasses and attached algae.
Most of these plants grow in shallow water and there are
marked seasonal changes in their growth and biomass (Taylor
and Saloman, 1966, 1970; Humm, 1969). Five species of sea
grass and more than 200 species of attached algae have been
reported for Tampa Bay (Phillips, 1960; Dawes, 1967). The
grasses are: Thalassla testudlnum, turtle grass; Diplanthera
wrightll, shoal grass; Syringodlum f lliforme, manatee grass;
Halophila engelmannl; and Ruppla maritima. widgeon grass.

Apart from their contribution to primary production
(Ryther, 1963) these plants create a unique estuarine habitat
(Stephens, 1966).

Sediments

Goodell and Gorsline (1961) made the first comprehensive

59
analysis of sediments in Tampa Bay on the basis of 400 bot-
tom samples. An additional 77 3 sediment samples were col-
lected and analyzed during the benthlc survey by the National
Marine Fisheries Service in 1963 (Taylor and Saloman, 1969).

Authors of the first study concluded that the limestone
basin of the Estuary dates from Miocene time and has since
been filled by Quartenary sediments to a depth of between
12 and 30 m. They found that the sediments are predominant-
ly quartz sand with an admixture of biogenic particles and
small amounts of silts and clays. Sediment pH was usually
above 7.0, and they attributed sediment homogeneity in the
upper 8 cm. to the activity of burrowing invertebrates. The
mean grain size in their samples was between -0.5 and 6.0
phi (0) . In general, mean grain size. and the weight percent-
age of shell increased from tidal flats to slopes and chan-
nels, and from the head of the Estuary to the Gulf. They
reported the average weight percentage of organic carbon
as 1.39 and found a direct relationship between high carbon
content and poor sediment sorting.

The main benefits from the second study were the acqui-
sition of sediment data for each survey station, and de-
lineation of fine sediment deposits in parts of Old Tampa
Bay, Hillsborough Bay, upper Tampa Bay, and Boca Ciega Bay.
Prom these data features of grain size, sorting, and weight

60

percentage of calcium carbonate and organic carbon have
been summarized for major areas of the Estuary (table 3).
The means and ranges of these four factors show that each
area can be regarded as a separate sedimentary basin. In
other words, irrespective of overall sediment trends, each
area has a very great variety of depositional environments
available to the infauna of the Estuary. Sediment type
alone, therefore, cannot be a limiting factor for poly-
chaetes in any major region of Tampa Bay Estuary.

61

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e

CHAPTER 4
PROCEDURE

Field sampling at transect and special- lettered stations
began in June, 1963, and continued until December of the
same year. Additional areas were sampled between 1963 and
1969 to supplement survey data and to assess environmental
conditions in connection with dredge-fill development appli-
cations (Taylor and Saloman, 1968) — see figure 1.

Transect stations were located along 20 compass lines
that crossed the long axis of the Estuary at intervals of
two to 6 km., and extended from the headwaters to about 9.8
km. offshore. Stations were 1 km. or less apart depending
on bottom type and water depth. Special stations that did
not coincide with the transect pattern were established to
sample unusual habitats such as tributaries, oyster reefs,
spoil islands, shoals, and isolated patches of submerged
vegetation.

Most of the sampling was done from an outboard motor-
boat. Some shore stations were reached by truck, and stations

62

63

in parts of the Bay and Gulf were sampled from the R/V
Klnqfish — a 12.9m., dlesel-powered vessel. Navigation
charts (587, 586, and 1257), shoreline features, compass,
clock, tachometer, and buoys were used to run transect
lines and establish stations. Seaward distances of off-
shore transects were determined by radar. A line of sta-
tions was laid out by following a compass bearing at con-
stant speed, and releasing plastic buoys at specific inter-
vals.

At stations deeper than 1 m., the infauna and sediment
were sampled with a bucket dredge, and epibenthic forms were
collected in a rigid-frame net. The dredge was 30 cm. wide
and dug to a depth of 5 cm. It had a capacity of 15 liters,

filled after a haul of 100 cm., and sampled a bottom area

2
of about 3,000 cm. . The net had an opening of 90 cm. by

26 cm. and was hung with netting of 3-mm. mesh (Taylor,
1965). One dredge sample and a two-minute net haul were
taken at each station. In shallow water, the net haul was
made by hand, and a shovel was used to supplement or re-
place the bucket dredge. In terms of surface area sampled,
three shovels of sediment were considered roughly equiva-
lent to a dredge sample.

All dredge and shovel samples were washed in a sieve

64
(Tyler 12-in. stainless-steel screen with 0.701-mm. mesh)
and fixed in 20 percent sea-water formalin. Rose Bengal
dye was added to the formalin to facilitate separation of
organisms from coarse sediment particles and debris.

At each station, about 300 cc. of sediment were col-
lected for analysis. These samples were stored in sealed,
plastic cups and forwarded to the Sediment Laboratory at
Florida State University, Tallahassee, Florida. Analyses
were performed under the direction of Dr. H. Grant Goodell.
Textural analysis was done by wet sieving on a screen of
62-u. mesh. The coarse fraction retained by the screen
was oven-dried and further separated by grain-size classes
on nested sieves attached to a mechanical shaker. Sediments
that passed the 62-u. screen (silts and clays) were mea-
sured electronically in a Coulter counter. From grain-
size data, computer programs produced statistical informa-
tion for mean grain size, standard deviation (sorting),
skewness, and kurtosis (Folk, 1964). A pulverized fraction
of each sample was used to determine the weight percentage
of calcium carbonate by the EDTA method of Turekian (1956).
Weight percentages of organic carbon and organic nitrogen
were determined with Coleman analytical equipment. Station
data for sediments, water temperature, pH, salinity, depth,
and bottom vegetation were reported by Taylor and Saloman

65

(1969). Measurements of dissolved oxygen, total phosphorus,
Kjeldahl nitrogen, light penetration, ultraviolet absorp-
tion, and primary productivity are available for all areas
of the Estuary from continuing investigations by the National
Marine Fisheries Service. These measurements are performed
by standard procedures (Saloman and Taylor, 1968).

In the laboratory, biological collections were rinsed
in fresh water, sorted into major groups (class or order),
and preserved in 70 percent isopropanol. The polychaetes
were subsequently sorted to family level, and in most
instances to species. Preserved representatives of all
polychaetes collected within Tampa Bay were deposited in
collections of the National Marine Fisheries Service at
St. Petersburg Beach, Florida, and the U. S. National
Museum, Washington, D. C. Major works that were especially
useful for taxonomic determinations include Ehlers (1887),
Fauvel (1923, 1927), Hartman (1945, 1951, 1968, 1969), Petti-
bone (1963a), and Day (1967). Polychaete terminology was
taken from the usage of Day (1967) and nomenclature was
based on publications by Hartman, or authoritative revisions
in more recent reports. All determinations have not been
verified, and errors that may be present are the responsi-
bility of the author.

CHAPTER 5
SYSTEMATICS AND ECOLOGICAL OBSERVATIONS

In this section, the 40 families of polychaete worms
found in Tampa Bay have been arranged phylogenetically,
and wherever necessary taxonomic keys have been devised
to distinguish species. The species in respective families
are listed alphabetically with undetermined individuals at
the end. For each species, locality records and the mean
and range of environmental factors have been tabulated.
Literature cited from this section includes only those
references that contain the original species description
or a more recent report that presents figures and a de-
scription of diagnostic features. For unidentified poly-
chaetes, a brief description and drawings were prepared as
an aid to recognition.

The most useful publication for identification of
polychaete families was the illustrated key prepared by
Day (1967). it contains all the families reported for the
Gulf of Mexico, and most of those known from the eastern
Pacific, Caribbean, and western Atlantic. Part I of

66

67
Pettibone's work on New England polychaetes (1963a) and

her keys in the manual compiled by Smith (1964) were also

6
helpful. Wass constructed a useful key and check-list

for the polychaetes of Virginia that contains many species
found in the Tampa Bay area, and reports by Carpenter (1951)
and Taylor (1961) contain keys for polychaetes north of
Tampa Bay at Alligator Harbor and Seahorse Key. Keys to
species in several publications by Hartman (1945, 1951,
1968, 1969) were indispensable. Her catalogues of poly-
chaetes of the world (1959a, 1959b, 1965) and her guide to
polychaete literature were also essential references.
Family POLYNOIDAE Malmqren. 1867

Polynoids are predaceous polychaetes that have world-
wide distribution from the tropics to high latitudes. They
are errant forms that commonly occur in coarse sediments
and crevices. Some are commensals, and a few are adapted
to life in fine sediments of silt and clay.

Eight species were found in Tampa Bay. One of these
(Polynoid B) was collected in all areas of the Estuary, and
two were found at widely separated stations in Old Tampa
Bay and Boca Ciega Bay (Polynoid A and Phyllohartmania
taylori) . The other five species are apparently limited

6
Marvin Wass, Virginia Institute of Marine Science,
Gloucester Point, Virginia, 23062.

68
to areas of the Estuary where average salinity is greater
than 25 parts per thousand as none were found north of
transect-10. Among these five, Lepidasthenia commensalis
and Harmothoe lunulata were the only ones found in upper
Tampa Bay, while the other three, Lepldonotus sublevls. L.
variabilis, and Harmothoe aculeata were collected only in
the high salinity waters of Boca Ciega Bay and lower Tampa
Bay.
Key to POLYNOIDAE Collected in Tampa Bay

1 Lateral antennae arise below median antenna 2

- Lateral antennae arise on anterior margin of
prostomium at same level as median antenna 5

2 Neurosetae with undivided tips 3

- Neurosetae with bidentate tips 4

3 Neurosetae finely serrate; notosetae smooth
and delicate; ciliated lamella at ventral
base of parapodla after setiger

two Phyllohartmania taylori

- Neurosetae coarsely serrate; notosetae

stout; parapodial lamella absent Polynoid B

4 Neurosetae delicate, faintly bidentate Polynoid A

- Neurosetae stout; elytra with

large tubecles Harmothoe aculeata

- Neurosetae stout; elytra smooth .... Harmothoe lunulata

5 More than 12 pairs of elytra. .Lepidasthenia commensalis

- Twelve pairs of elytra 6

69
6 Neurosetae with bidentate tips.... Lepidonotus sublevis
- Neurosetae with undivided tips.. Lepidonotus variabilis

Harmothoe aculeata Andrews, 1891
(Described and illustrated by Ebbs, 1966)

Specimens were found only in incidental samples in
southern Boca Clega Bay and lower Tampa Bay, near Mullet
Key. All of the worms were large and appeared mature, but
none contained ripe gametes.

This species has been reported from shelly sediments
and solid substrata along the Atlantic coast from North
Carolina to the Caribbean and Gulf of Mexico.

70

Harmothoe lunulata (delle Chiaje, 1841)
(Described and illustrated by Day, 1967)

Specimens were collected at 38 localities. Thirty-
six were survey stations and additional records came from
a turtle grass flat inside Johns Pass, and in lower Tampa
Bay near Mullet Key. No specimens were collected in low
salinity areas of the Estuary north of transect-10. Al-
though one-half the locality records came from upper Tampa
Bay, the greatest number of individuals per dredge haul
were taken at station 16-14 in lower Tampa Bay (table 4) .

Average sediment type at survey stations was poorly
sorted sand that contained a high percentage of shell frag-
ments (table 5) . Vegetation was recorded at 50 percent of
the survey stations, and at the two incidental localities
as well.

Plants at survey stations included algae, turtle grass,
shoal grass, and manatee grass.

Individuals with mature gametes were collected in
September and October.

H. lunulata is known as a commensal or an inhabitant
of coarse sediments along the western coasts of Europe and
Africa, and central and southern regions of the east and
west coasts of the United States. H. lunulata has never
before been reported in the Gulf of Mexico.

71

Table 4. — Harmothoe lunulata — Locality records and number
of individuals from survey stations, Tampa Bay,
Florida, 1963-69 (D-dredge, S-shovel, N-net)

Upper Tampa Bay

Stations

Individuals Stations

Individuals

D S N

D S N

10-1-A

1

11-2

2

11-4

I

11-5

1

11-6

1

11-15

1

11-16

2

11-20

3

12-1

1

12-6

1

12-9

1

12-10

2

12-14

2

12-15

3

13-4

2

13-5

2

13-8

1

13-10

1

Boca Ciega Bay

D-1S
D-23

15-5
15-14

Terra Ceia Bay

E-5

Lower Tampa Bay

14-12

1

14-16

1

14-17

1

15-22

2

15-26

1

15-31

2

16-9-B

16-14

4

16-24

2

17-2

2

17-3

1

17-7

1

17-11

72

Table 5. — Harmothoe lunulata — Mean and range of observed
environmental factors from survey stations,
Tampa Bay, Florida, 1963-69

Factor

Mean

Range

Number
observations

Water temperature (°C.)

Salinity (%.)

PH

Depth (m.)

Sediment type

Granules (wt. %)

Sands (wt. %)

Silts (wt. %)

Clay (wt. %)

CaC03(wt. %)

Organic carbon (wt. %)

Organic nitrogen (wt. %)

Mean grain size,
total sample (0)

Standard deviation,
total sample (0)

Skewness, total sample

Kurtosis, total sample

Kean grain size,
noncarbonate fraction (0)

Standard deviation,
noncarbonate fraction (0)

Mean grain size,
carbonate fraction (0)

Standard deviation,
carbonate fraction (0)

23.0

14.0

to

31.0

36

29.2

23.3

to

34.9

36

8.1

7.2

to

8.9

36

1.5

Zi

to

4.0

36

sand

shelly sand to
silty sand

35

3.7

0.1

to

41.5

35

92.4

43.7

to

99.9

35

2.9

0.0

to

13.4

35

1.1

0.0

to

8.8

35

23.5

1.2

to

85.2

35

1.0

0.1

to

8.5

32

0.1

0.0

to

0.3

32

2.1

0.5 to 3.4

3 5

1.3

0.5

to

3.5

35

0.3

0.0

to

2.1

35

9.4

-0.4

to

31.9

35

3.3

1.7

to

9.0

35

1.6

0.6

to

3.4

35

0.1

-2.5

to

2.2

27

1.3

0.8

to

2.0

27

73

Lepldasthenla comroensalis (Webster, 1879a)

Specimens were collected at six survey stations and
an incidental locality near Mullet Key in lower Tampa Bay.
No worms were collected north of transect-10, and no more
than one individual was taken in any one sample (table 6).

Average sediment type was poorly sorted sand (table
7). The bottom at four stations was vegetated with algae,
and turtle grass or shoal grass.

No gravid specimens were collected, but one juvenile
worm was taken in a December sample.

L. commensalls is known from the eastern coast of
the United States and the Gulf of Mexico where it is fre-
quently associated with tube worms, gastropods, hermit
crabs, and other suitable consorts.

74

Table 6. — Lepldasthenla commensal Is—Locality records

and number of individuals from survey stations,
Tampa Bay, Florida, 1963-69 (D-dredge, S-shovel,
N-net)

Hillsborough Bay

Stations

Individuals Stations

Individuals

D S N

D S N

10-17

1

Upper Tampa Bay

11-6

1

Boca Ciega Bay

D-25

1 PB-4

1

Terra Ceia Bay

E-l

1

Lower Tampa Bay

17-2

1

75

Table 7. — Lepldasthenla commensalis — Mean and range of
observed environmental factors from survey
stations, Tampa Bay, Florida? 1963-69

Factor

Mean

Ranc

re

Number
observations

Water temperature (*C.

)

23.9

15.5

to

30.8

6

Salinity (%. )

29.3

21.8

to

34.5

6

pH

8.1

7.7

to

8.4

6

Depth (m.)

1.5

£1

to

11.0

6

Sediment type

sand

—

5

Granules (wt. %)

2.0

0.0

to

7.5

5

Sands (wt. %)

94.3

90.1

to

95.6

5

Silts (wt. %)

2.5

1.4

to

3.5

5

Clay (wt. %)

1.1

0.3

to

2.6

5

CaC03(wt. %)

14.1

2.9

to

39.8

5

Organic carbon (wt. %)

0.6

0.3

to

1.1

4

Organic nitrogen (wt.

X)

0.1

0.0

to

0.1

4

Mean grain size,
total sample (0)

2.7

1.9

to

4.5

5

Standard deviation,
total sample (0)

1.4

0.6

to

2.3

5

Skewness, total sample

0.5

-0.4

to

2.1

5

Kurtosis, total sample

5.6

0.0

to

20.1

5

Mean grain size,
noncarbonate fraction

(0)

3.1

2.8

to

3.5

4

Standard deviation,
noncarbonate fraction

(0)

1.7

0.9

to

3.2

4

Mean grain size,
carbonate fraction (0)

0.3

-0.1

to

0.9

4

Standard deviation,
carbonate fraction (0)

1.3

0.9

to

1.7

4

76

Lepidonotus sublevls Verrill, 1873
(Described and illustrated by Hartman, 1942a)

This species was collected at six survey stations and
four other localities. Two of the incidental collections
came from Boca Ciega Bay, one from Old Tampa Bay, and one
from lower Tampa Bay. The locality in Old Tampa Bay was
near the southwest end of Gandy Bridge where salinity is
usually about 25 parts per thousand. Most records came
from Boca Ciega Bay as did the dredge haul containing the
greatest number of individuals (table 8).

Sediment at the only station where the worm was
dredged (BC-N) was poorly sorted sand that contained a
high percentage of large shell particles and little organic
carbon (table 9) .

No vegetation was noted at that station.

Specimens with mature gametes were collected in De-
cember, and a juvenile worm was taken in November.

L. sublevls occurs in shelly sediments and lives as a
commensal along the New England coast, south to Florida and
the Gulf of Mexico.

77
Table 8. — Lepidonotus sublevls — Locality records and
number of individuals from survey stations,
Tampa Bay, Florida, 1963-69 (D-dredge, S-
shovel, N-net)

BC-N

16-18

Boca Ciega Bay

Stations Individuals Stations Individuals

D S N D S N

BC-A 1 PB-4 4

BC-M-1 1 14_3 !

Lower Tampa Bay

78
Table 9. — Lepidonotus sublevls — Mean and range of observed
environmental factors from survey stations,
Tampa Bay, Florida, 1963-69

Factor

Mean

Range

Number
observa tions

Water temperature (#C.) 17.5

Salinity (.%.) 32.2

pH 8.3

Depth (m.) 2-0

Sediment type sand

Granules (wt. %) 14.7

Sands (wt. %) 83.5

Silts (wt. %) 1.5

Clay (wt. %) 0.3

CaC03(wt. %) 38.2

Organic carbon (wt. %) 0.2

Organic nitrogen (wt. %) 0.1

Mean grain size,

total sample (0) 1.4

Standard deviation,

total sample (0) 1.9

Skewness, total sample -0.3

Kurtosis, total sample 0.9

Mean grain size,

noncarbonate fraction (0) 2.7

Standard deviation,
noncarbonate fraction (0) 0.7

Mean grain size,

carbonate fraction (0) 1.5

Standard deviation,

carbonate fraction (0) 0.2

79

Lepidonotus variabilis Webster, 1879
(Described and illustrated by Ebbs, 1966)

Collections came from nine survey stations, and one
incidental sample in lower Tampa Bay near Mullet Key.
Four of the collections at survey stations came from lower
Tampa Bay, and the other five were from Boca Ciega Bay.
No specimens were taken north of transect-14 (table 10) .

Sediment data from the two dredge collections indicate
that the worm lives on poorly sorted sand that contains a
high percentage of coarse shell fragments (table 11) .

Benthic algae, but no sea grass, were noted at one
of the dredge stations.

Specimens with mature gametes were collected in April,
July, and October.

L. variabilis lives in sediments containing shell or
gravel, or as a commensal over a geographic range that ex-
tends from North Carolina south to the Caribbean and Gulf
of Mexico.

80
Table 10.~Lepldonotus variabilis— Locality records and
number of individuals from survey stations,
Tampa Bay, Florida, 1963-69 (D-dredge, S-
shovel, N-net)

Boca Ciega Bay

Stations

Individuals Stations

Individuals

D

S

N

D S N

BC-N
D-25
PB-1

2 PB-4
4 16-2

1

4

3

Lower Tampa Bay

14-5
14-13

1

1 15-25
17-2

1

1

81

Table 11.— Lepldonotus variabilis— Mean and range of
observed environmental factors from survey
stations, Tampa Bay, Florida, 1963-69

Factor

Mean

Water temperature (°C.)

Salinity (%„)

pH

Depth (m.)

Sediment type

Granules (wt. %)

Sands (wt. %)

Silts (wt. %)

Clay (wt. %)

CaC03(wt. %)

Organic carbon (wt. %)

Organic nitrogen (wt. %)

Mean grain size,
total sample (0)

Standard deviation,
total sample (0)

Skewness, total sample

Kurtosis, total sample

Mean grain size,
noncarbonate fraction (0)

Standard deviation,
noncarbonate fraction (0)

Mean grain size,
carbonate fraction (0)

Standard deviation,
carbonate fraction (0)

Range

Number
observations

21.1

18.1 to

24.0

2

31.7

30.7 to

32.6

2

8.1

8.0 to

8.3

2

3.0

—

2

sand

sand

2

4.6

3.2 to

6.0

2

93.3

93.1 to

93.6

2

1.4

0.3 to

2.5

2

0.7

0.2 to

1.2

2

47.8

43.3 to

52.0

2

1.5

0.3 to

2.8

2

0.0

—

2

1.6

1.3 to 1.9

1.6

1.5

to

1.6

2

0.3

0.1

to

0.5

2

2.5

0.4

to

4.6

2

2.7

2.6

to

2.8

2

0.9

0.9

to

1.0

2

1.1

-1*3

to

-1.0

2

1.4

1.2

to

1.5

2

82
Phyllohartmanla taylorl Pettibone, 1961

A single specimen was collected by dredge in Old
Tampa Bay, and another by net in Boca Ciega Bay. The
Old Tampa Bay record was near the southwest end of
Courtney Campbell Parkway (table 12).

Sediment data indicate that this worm lives in poor-
ly sorted sand that has an appreciable admixture of silt
and clay, and a few large shell fragments (table 13).

No bottom vegetation was noted at the dredge station.

The specimen collected from Boca Ciega Bay in May
was a juvenile. No worm with mature gametes was observed.

Originally described from Seahorse Key, Florida, this
report is only the second locality record for p. taylori.

83

Table 12. — Phyllohartmania taylorl — Locality records and
number of individuals from survey stations,
Tampa Bay, Florida, 1963-69 (D-dredge, S-
shovel, N-net)

Old Tampa Bay

Stations

Individuals Stations

Individuals

D S N

D S N

4-7

1

Boca Ciega Bay

D-25

1

84

Table 13. — Phyllohartmanla taylori — Mean and range of
observed environmental factors from survey
stations, Tampa Bay, Florida, 1963-69

Factor

Mean

Range

Number
observations

Water temperature (*C.) 28.6

Salinity (.%.) 24.3

pH 7.9

Depth (m. ) 1.5

Sediment type sand

Granules (wt. %) 1.2

Sands (wt. %) 87.6

Silts (wt. %) 5.2

Clay (wt. %) 6.0

CaC03(wt. %) 1.3

Organic carbon (wt. %) 0.6

Organic nitrogen (wt. %) 0.1

Mean grain size,

total sample (0) 3.0

Standard deviation,

total sample (0) 2.0

Skewness, total sample 0.8

Kurtosis, total sample 3.7

Mean grain size,

noncarbonate fraction (0) 3.1

Standard deviation,
noncarbonate fraction (0) 1.7

Mean grain size,

carbonate fraction (0) -1.0

Standard deviation,

carbonate fraction (0) 1.4

85
Polynold A

The body has 23 setigerous segments and evidence of
12 pairs of elytra. Dimensions of the largest specimen
were 5 mm. long by 3 mm. wide including the width of para-
podia. Lateral antennae are small and inserted ventral to
the median antenna (broken on all specimens) . Palps are
large and about the same width as the base of the median
antenna. Dorsal, tentacular cirri are longer than ventral
ones. Anterior eyes are beneath the prostomial lobes, and
the posterior pair is in line with bases of the tentacular
cirri and a median, anterior prolongation of the first seg-
ment. The anterior margin of the first segment and bases
of parapodla are darkly pigmented.

Dorsal, parapodial cirri are one and one-half times
longer than the pre-setal, neuropodial lobes (figure 2, A) .
Ventral cirri are about the same length as the post-setal
lobes. Notosetae are fine, and taper to capillary tips
(figure 2,B). The dorsal edge in the region of curvature
has a very fine, serrate margin. Neurosetae are somewhat
stouter and end in finely bidentate tips (figure 2,C).
Serrations on the dorsal margin are fine and widely spaced.

This undetermined polynoid was collected at eight
stations in Old Tampa Bay, and a single station in Boca

86
Ciega Bay (table 14).

Sediment was poorly sorted sand at all dredge stations,
except one, where the bottom was sllty mud. The sandy sedi-
ment had an average silt-clay content of over 10 percent
and about one percent organic carbon (table 15).

No bottom vegetation was observed at dredge stations.

Specimens with mature gametes were collected in July
and August.

87

Table 14. — Polynoid A — Locality records and number of

individuals from survey stations, Tampa Bay,
Florida, 1963-69 (D-dredge, S-shovel, N-net)

3-12

1

4-3

1

4-12

1

4-16

2

Old Tampa Bay

Stations

Individuals Stations

Individuals

D S N

D S N

4-1 7-A

1

4-19

2

5-8

1

5-10

1

Boca Ciega Bay

BC-N

88

Table 15. — Polynold A — Mean and range of obseved environ-
mental factors from survey stations, Tampa Bav.
Florida, 1963-69 *'

Factor

Water temperature ('C.)

Salinity (%„)

PH

Depth (m.)

Sediment type

Granules (wt.%)

Sands (wt. %)

Silts (wt. %)

Clay (wt. %)

CaC03(wt. %)

Organic carbon (wt. %)

Organic nitrogen (wt. %)

Mean grain size,
total sample (0)

Standard deviation,
total sample (0)

Skewness, total sample

Kurtosis, total sample

Mean grain size,
noncarbonate fraction (0)

Standard deviation,
noncarbonate fraction (0)

Mean grain size,
carbonate fraction (0)

Standard deviation,
carbonate fraction (0)

Mean

Range

Number
observations

28.6

17.5

to

31.0

9

25.3

23.7

to

32.1

9

8.1

7.9

to

8.3

7

1.5

3.0

to

7.0

9

sand

sand
mud

to

silty

9

2.1

0.0

to

14.7

9

87.5

33.7

to

99.8

9

5.7

0.1

to

35.9

9

4.7

0.1

tc

30.2

9

8.3

1.2

to

38.2

9

1.0

0.2

to

1.4

4

0.4

0.1

to

1.1

4

3.0

1.4

0.7

14.1

3.3

1.7

-0.4

1.2

1.4 to 6.0

0.6 to 2.5

-0.3 to 1.5

-1.3 to 61.8

2.7 to 3.7

0.7 to 2.1

-2.5 to 1.6

0.2 to 2.1

89
Polynold B

The body has 27 setigerous segments, and 15 pairs of
elytra. The largest specimen was 7 mm. long and 4 mm.
wide, including parapodia. Lateral antennae are ventral
to the median antenna, and have an inflated base that
narrows to form a slender tip. The median antenna, palps,
and tentacular cirri are all about the same length, but
palps are twice as wide as the other processes. Anterior
eyes are crescent-like, and the posterior ones are smaller,
round, and set close to the segmental margin (figure 2,D).

Elytra are nearly round, and have a small number of
widely spaced tubercles along the outer margin (figure 2,E) .

Dorsal, parapodial cirri are papillated and somewhat
longer than the pre-setal lobes of neuropodia. Ventral
cirri are smooth and short (figure 2,F).

Notosetae are smooth and have rounded tips (figure 2,
G) . Neurosetae are the same thickness as notosetae, but
the outer one-third of the shaft has serrate edges. The
tip is entire and curved slightly upward (figure 2,H, I).

On the basis of locality records, this worm is the
most common and widely distributed polynoid in Tampa Bay.
It was found in all six areas at a total of 54 stations.
Areas of greatest abundance were Boca Ciega Bay, upper

90

Tampa Bay, and Old Tampa Bay. The largest number of indi-
viduals in a single dredge haul were recorded at station
11-6 in upper Tampa Bay (table 16).

At that station the sediment was poorly sorted, fine
sand with very little shell and about four percent silt
and clay. Average sediment type was poorly sorted, silty
sand with about 10 percent shell (table 17).

Five of the 54 stations were vegetated with algae and
two had shoal grass as well.

Individuals with mature gametes were collected in June,
August, and November.

91

Table 16. — Polynold B — Locality records and number of

individuals from survey stations, Tampa Bay,
Florida, 1963-69 (D-dredge, S-shovel, N-net)

A

1

B

12

1-3

2

1-4

40

1-5

1

3-3

1

3-4

4

3-5

2

3-6

3

3-7

3

3-10

1

3-11

1

Hillsborough Bay

Old Tampa Bay

Stations

Individuals Stations

Individuals

D S N

D S N

4-2

1

4-5

1

4-6

7

4-7

15

4-8

1

4-11

2

4-12

5

4-13

8

4-14

5

4-15

6

4-16

4

4-1 7-A

1

10-17

Upper Tampa Bay

10-8

1

11-6

16

11-7

2

11-8

12

11-11

2

11-12

1

11-13

1

11-14

2

11-17

3

11-18

5

11-20

3

11-21

1

12-14

1

92

Table 16. — Polynold B — Locality records and number of

Individuals from survey stations, Tampa Bay,
Florida, 1963-69 (D-dredge, S-shovel, N-net) —
(continued)

Stations

Boca Ciega Bay

Individuals

Stations

Individuals

BC-A

5

BC-H

3

BC-I

1

D-l

1

D-22

1

PB-5

1

14-2

4

15-4

1

15-5

2

15-6

2

15-8

1

15-13

1

15-14

4

16-23

Terra Ceia Bay

E-3

E-5

Lower Tampa Bay

93

Table 17. — Polynold B — Mean and range of observed environ-
mental factors from survey station, Tampa Bay,
Florida, 1963-69

Number
Factor Mean Range observations

Water temperature CC.)

Salinity (%„)

PH

Depth (m.)

Sediment type

Granules (wt. %)

Sands (wt. %)

Silts (wt. %)

Clay (wt. %)

CaC03(wt. %)

Organic carbon (wt. %)

Organic nitrogen (wt. %)

Mean grain size,

total sample (0) 3.7 1.9 to 7.3 55

Standard deviation,

total sample (0) 1.7 0.7 to 2.7 55

Skewness, total sample 0.7 -0.9 to 2.1 55

Kurtosis, total sample 7.4 -0.9 to 37.7 55

Mean grain size,

noncarbonate fraction (0) 3.1 1.7 to 4.0 55

26.9

14.5

to

31.5

55

26.8

21.2

to

34.6

55

7.9

7.0

to

8.5

43

1.5

Zi

to

4.0

55

silty
sand

sand
silt

to

clayey

55

0.9

0.0

to

9.7

55

77.4

4.6

to

99.4

55

12.4

0.2

to

52.5

55

9.4

0.1

to

47.0

55

10.9

0.9

to

66.0

55

0.6

0.1

to

3.8

33

0.3

0.0

to

8.0

33

Standard deviation,

noncarbonate fraction (0) 1.4 0.4 to 2.2 55

Mean grain size,

carbonate fraction (0) -0.2 -2.5 to 2.4 55

Standard deviation,

carbonate fraction (0) 1.32 0.5 to 2.9 55

1.7

0.7

to

2.7

0.7

-0.9

to

2.1

7.4

-0.9

to

37.7

3.1

1.7

CO

4.0

1.4

0.4

to

2.2

0.2

-2.5

to

2.4

1.32

0.5

to

2.9

Figure 2. — Diagnostic features of Polynoid A and
Polynoid B

Polynoid A: (A) Parapodium from median section (B)
Notoseta tram same parapodium (C)
Neuroseta from same parapodium

Polynoid B: (D) Prostomium (E) Elytrum from median
section (F) Parapodium from same seg-
ment (G) Notoseta from same segment (H)
Neuroseta from same segment (I) Tip of
neuroseta, rotated and enlarged.

FIGURE 2

05

96
Family POLYODONTIDAE Pfluqf elder, IB 34
Polyodontids comprise a small, rare group of large
polychaetes that construct tubes In unconsolidated sedi-
ments. Little is known concerning their diet, but con-
sidering their large jaws and teeth, they probably eat a
variety of organisms that pass within their reach. This
predominantly tropical family has its greatest representa-
tion in the Caribbean and low latitudes of Atlantic and
Pacific oceans. Two species were collected in Tampa Bay.
Key to POLYODONTIDAE Collected in Tampa Bay

1 Shaft of dorsal, pseudopenicillate neurosetae
enlarged in the middle; bristles on dorsal and
ventral neurosetae sparse and short.... Polyodontes sp.

Shaft of dorsal, pseudopenicillate neurosetae

without median enlargement; bristles on

dorsal and ventral neurosetae conspicuous

and numerous Polyodontes luplna

Polyodontes lupina (Stimpson, 1856)
(Described and illustrated by Taylor, 1961)

This species was collected at one station in Old Tampa
Bay and one in lower Tampa Bay (table 18).

Sediment at both stations was sand with very little
silt and clay, and a small percentage of large shell parti-
cles (table 19).

No specimens contained mature gametes and no juveniles
were collected.

97

Previous records for P. luplna have come from muddy
bottom along the south Atlantic coast and the Gulf of
Mexico .

98

Table 18. — Polyodontes luplna — Locality records and number
of individuals from survey stations, Tampa Bay,
Florida, 1963-69 (D-dredge, S-shovel, N-net)

Old Tampa Bay

Stations

Individuals Stations

Individuals

D S N

D S N

5-7

1

Lower Tampa Bay

16-27

1

99

Table 19. — Polyodontes luplna — Mean and range of observed
environmental factors from survey stations,
Tampa Bay, Florida, 1963-69

Factor

Mean

Number

Ranc

e

observations

21.0

to

31.0

2

24.6

to

30.3

2

8.0

to

8.1

2

1.0

to

2.0

2

—

2

0.6

to

1.8

2

95.5

to

99.1

2

0.1

to

2.1

2

0.2

to

0.6

2

9.2

to

11.2

2

—

I

1

Water temperature (*C.)

Salinity (.%•)

PH

Depth (m.)

Sediment type

Granules (wt.%)

Sands (wt. %)

Silts (wt. %)

Clay (wt. %)

CaC03(Wt. %)

Organic carbon (wt. %)

Organic nitrogen (wt. %)

Mean grain size,
total sample (0)

Standard deviation,
total sample (0)

Skewness, total sample

Kurtosis, total sample

Mean grain size,
noncarbonate fraction (0)

Standard deviation,
noncarbonate fraction (0)

Mean grain size,
carbonate fraction (0)

Standard deviation,
carbonate fraction (0)

25.9
27.4

8.0

1.5
sand

0.9
98.5

1.1

0.4
10.2

0.2

0.1

2.2 2.1 to 2.3

1.1

0.9 to

1.3

2

0.3

«

2

7.4

6.0 to

8.7

2

2.8

2.1 to

3.4

2

1.5

1.0 to

2.0

2

0.94

-1.1 to

-0.8

2

1.5 1.4 to 1.6

100

Polyodontes sp.

The only specimen collected was Incomplete, and came
from an incidental sample in Boca Ciega Bay at Bunces Pass.
The anterior fragment was only 3 mm. wide including para-
podia, and an entire worm would probably measure less than
30 mm. long. If the worm was mature, then this species
is quite small for a polyodontid.

Each jaw has eight, small teeth, and a single, large
median tooth. Behind the teeth, the proboscis has a long,
median upper and lower papilla with seven smaller papillae
on each side. The anterior pair of eyes is elevated on
short stalks and the smaller posterior pair is situated on
the mid-line of the prostomium.

Elytra have a clear margin and dark pigmentation in
the center, especially over the dorsum.

Parapods are short and blunt with the post-setal lobe
slightly longer than the pre-setal one. Dorsal and ventral
cirri are about the same length, but the dorsal one is
stouter (figure 3, A). Notosetae were not observed, if
present, they are presumably fine, spinous capillaries.
Ventral neurosetae are long and have an asymmetrical en-
largement in the shaft near the tip (figure 3,D). The
median, aristate setae have a terminal, spinous appendage

101

that tapers to a fine tip (figure 3,C). Dorsal neurosetae
are similar to ventral ones except they are shorter and
the median enlargement is symmetrical (figure 3,B).

102

Family SIGALIONIDAE Malmqren, 1867

The Sigalionids are burrowing or crawling predators

that live in unconsolidated sediments over a wide range of

latitude in all seas. Three species were found in Tampa

Bay. Locality data indicate that two (Sthenelais boa and

Sigallon arenicola) are limited by salinity to waters of

greater than 20 parts per thousand, and one ( Pholoe sp.)

requires average salinity of at least 25 parts per thousand.

Key to SIGALIONIDAE Collected in Tampa Bay

1 Length 3 mm. or less; elytra with unbranched

papillae; no cirriform branchiae Pholoe sp.

- Body large, elytra with a fringe of slender

papillae; cirriform branchiae present .... Sthenelais boa

- Body large, elytra with pinnately branched

papillae; cirriform branchiae present. .Sigallon arenicola

Sigallon arenicola Verrill, 1879
(Described and illustrated by Pettibone, 1963a)

S. arenicola was collected in one incidental sample
near Gandy Bridge in Old Tampa Bay, at two survey stations
in upper Tampa Bay, at a single station in Boca Ciega Bay,
and at 22 stations in lower Tampa Bay. The most individuals
per dredge haul (23) came from station 15-28 in lower Tampa
Bay (table 20).

All specimens were collected from poorly sorted, medium
sand or shelly sand with an average silt-clay content of

103

less than two percent. Much of the sand fraction was com-
posed of shell fragments In the coarse sand size category
(table 21).

Of the 25 dredge stations where this species was re-
corded, no bottom vegetation was noted at 15, and algae,
but no sea grass, were found at 10.

No individuals with mature gametes were observed,
however, juveniles were collected in October and November.

104

Table 20. — Slqallon arenlcola — Locality records and num-
ber of individuals from survey stations, Tampa
Bay, Florida, 1963-69 (D-dredge, S-shovel,
N-net)

Upper Tampa Bay

Stations

Individuals Stations

Individuals

D S N

D S N

13-8

1 13-10

6

Boca Ciega Bay

16-5

2

Lower Tampa Bay

14-11

1

14-12

3

14-14

3

14-15

2

15-21

2

15-22

8

15-23

5

15-25

20

15-26

9

15-27

4

15-28

23

16-13

6

16-14

8

16-15

16

16-16

8

16-17

5

16-24

1

17-2

2

17-3

3

17-4

9

17-8

1

18-3

3

105

Table 21. — Sigallon arenicola — Mean and range of observed
environmental factors from survey stations,
Tampa Bay, Florida, 1963-69

Factor

Mean

Range

Number
observations

Water temperature (°C.)

Salinity <%„)

PH

Depth (m. )

Sediment type

Granules (wt. %)

Sands (wt. %)

Silts (wt. %)

Clay (wt. %)

CaC03(wt. %)

Organic carbon (wt. %)

Organic nitrogen (wt. %)

Mean grain size,
total sample (0)

Standard deviation,
total sample (0)

Skewness, total sample

Kurtosis, total sample

Mean grain size,
noncarbonate fraction (0)

Standard deviation,
noncarbonate fraction (0)

Mean grain size,
carbonate fraction (0)

Standard deviation,
carbonate fraction (0)

22.6

16.0 to 25.0

25

32.2

27.0 to 34.5

24

8.0

7.7 to 8.3

25

2.1

£1 to 3.9

25

sand

shelly sand to
sand

25

4.2

0.5 to 20.8

25

94.4

77.4 to 99.2

25

1.1

0.2 to 7.2

25

0.3

0.1 to 1.9

25

38.8

6.5 to 85.2

25

0.8

0.03 to 5.0

25

0.04

0.00 to 0.19

25

1.6 0.6 to 3.0 25

1.3 0.8 to 2.0 25

0.2 -0.6 to 0.8 25

4.6 -0.03 to 11.9 25

2.9 1.7 to 5.9 25

1.3 0.6 to 3.2 25

0.4 -1.'3 to 1.7 22

1.1 0.8 to 1.6 22

106

Sthenelals boa (Johnston, 1833)
(Described and Illustrated by Pettibone, 1963a)

Specimens were collected in all six areas of the
Estuary at a total of 104 survey stations and in five
incidental samples. As many as 40 individuals were col-
lected in a single dredge haul from station BC-N in Bunces
Pass. Salinity below 20 parts per thousand is apparently
no barrier to S. boa as 14 localities were recorded north
of Courtney Campbell Parkway in Old Tampa Bay (table 22).

Sediment data show that this species occupies a
variety of bottom types which range from clayey silt to
shelly sand. Average sediment type was poorly sorted sand
with a moderate amount of coarse shell and less than 10
percent silt and clay (table 23).

About 25 percent of the dredge and shovel stations
were vegetated with algae, and shoal grass, turtle grass,
or manatee grass were recorded at a few.

Gravid specimens were collected in May and juveniles
were noted in July, August, September, October, November,
and December.

107

Table

22.-

— Sthenelais boa — Loca

lity records

and

number of

indi

vidi

lals from

survey stations,

Tan

ipa Bay,

Flor

Ida,

1963-69

(D-

dredge, S-shovel,

N-net)

Old Tampa Bay

Stations

Individuals

Stations

Individuals

D

S

N

0

S N

1-3

2

4-7,.

1

4

1-4

2

4-9

4

1-5

3

4-12

3

3-3

1

4-13

3

7

3-4

12

43

4-14

2

2

3-5

1

4-15

2

3

3-6

2

4

4-16

11

3-7

1

5

4-1 7-A

3

3-8

2

4-18-A

1

3-10

1

4-19

2

3-11

2

1

5-6

3

3-12

5

1

5-8

1

3-13

1

5-11

1

3-16

3

5-12

3

4-3

2

5

6-4-A

2

4-4

9

6-5

1

4-5

1

6-6

4

4-6

1

1

Hillsborough

Bay

10-15

1

108

Table 22. — Sthenelals boa — Locality records and number of
individuals from survey stations, Tampa Bay,
Florida, 1963-69 (D-dredge, S-shovel, N-net)-
( continued )

Upper Tampa

Bay

Stations

Individuals

Stations

Individuals

D

S

N

D S

N

10-3

1

11-16

1

10-4

17

11-17

1

10-6

4

11-18

1

9

10-7

8

11-20

7

10-8

9

12-2

1

11-3

7

12-3

4

11-4

19

4

12-4

4

11-5

9

12-7

4

11-6

16

12-8

1

11-7

6

10

12-9

1

11-8

9

17

12-12

1

11-9

12

9

12-14

18

6

11-12

1

13-4

1

11-13

2

2

13-5

5

11-14

6

13-11

1

11-15

1

15

Boca Ciega

Bay

3C-A

4

2

14-2

2

BC-E

4

14-3

3

BC-H

1

14-4

3

3C-I

1

15-6

4

BC-M

1

15-12

4

BC-N

40

2

15-13

1

D-ll

1

15-14

1

D-25

3

3

15-15

.'.

PB-1

2

16-1

1

PB-4

1

16-6

2

PB-5

2

109

Table 22. — Sthenelals boa — Locality records and number of
individuals from survey stations, Tampa Bay,
Florida, 1963-69 (D-dredge, S-shovel, N-net)-
(continued)

Terra

Ceia

Bay

Stations

Individuals

Stati

ons

Individuals

D S N

D S N

E-l
E-4

1
1

E-5
E-8

1

1

Lower

Tampa

Bay

14-5

3

14-6

5

14-9

2

14-10

6

14-16

13

16-9-B

16-11

2

16-22

2

16-23

1

17-2

11

17-6

1

17-8

5

17-9

2

17-13

8

110

Table 23. — Sthenelals boa — Mean and range of observed
environmental factors from survey stations,
Tampa Bay, Florida, 1963-69

Number
Factor Mean Range observations

Water temperature (°C.)

Salinity (%„ )

PH

Depth (m. )

Sediment type

Granules (wt. %)

Sands (wt. %)

Silts (wt. %)

Clay (wt. %)

CaC03(wt. %)

Organic carbon (wt. %)

Organic nitrogen (wt. %)

Mean grain size,
total sample (0)

Standard deviation,
total sample (0)

Skewness, total sample

Kurtosis, total sample

Mean grain size,
noncarbonate fraction (0)

Standard deviation,
noncarbonate fraction (0)

Mean grain size,

carbonate fraction (0) -0.2 -2.5 to 3.0 77

Standard deviation,

carbonate fraction (0) 1.3 0.2 to 2.9 78

24.6

12.5 to 32.0

98

27.7

21.2 to 35.8

98

8.0

7.3 to 8.9

84

1.3

0.3 to 3.9

98

sand

shelly sand to
clayey silt

98

2.0

0.0 to 41.5

97

88.3

4.6 to 99.9

97

5.7

0.0 to 52.6

97

3.9

0.0 to 43.8

97

10.8

0.8 to 44.4

97

0.9

0.02 to 8.5

65

0.1

0.0 to 0.2

65

2.9

0.8 to 7.3

97

1.3

0.4 to 3.5

97

0.6

-1.7 to 2.4

9"?

12.5

-1.3 to 62.5

95

3.2

1.4 to 9.0

91

1.5

0.5 to 3.4

91

in

Pholoe sp.
This minute sigalionid is approximately 1.5 mm. long
by 0.5 mm. wide. The 15 setigers are,. covered by nine pairs
of elytra that leave a broad section of the dorsum exposed.
Elytra have an outer fringe of secretory papillae with
visible internal structure (figure 3.H.I). Parapodia have
a prolonged neurosetal lobe and long ventral cirrus (figure
3,E). Notosetae are spinous capillaries and neurosetae are
stout, compound falcigers (figure 3,F,G).

Specimens were collected at one station in upper Tampa
Bay and three stations in lower Tampa Bay (table 24).

Sediment at all stations was poorly sorted sand with
a large percentage of coarse shell. The non-carbonate
fraction was largely coarse silt that contained a high per-
centage of organic carbon (table 25).

Algae were noted at only one station, and no sea grasses
were recorded.

Neither gravid nor juvenile specimens were seen.

112

Table 24. — Pholoe sp. — Locality records and number of

individuals from survey stations, Tampa Bay,
Florida, 1963-69 (D-dredge, S-shovel, N-net)

Upper Tampa Bay

Stations

Individuals Stations

Individuals

D S N

D S N

13-8

1

Lower Tampa Bay

16-12
16-13

1 16-14
1

4

113

Table 25. — Pholoe sp. — Mean and range of observed environ-
mental factors from survey stations, Tampa Bay,
Florida, 1963-69

Factor

Number

Mean

Ranc

e

observations

23.4

21.3

to

24.1

4

32.6

29.4

to

33.9

4

7.9

7.8

to

8.2

4

2.9

2.6

to

3

4

sand

—

3

4.8

2.1

to

7.9

3

93.9

91.6

tc

96.8

3

1.0

0.4

to

1.9

3

0.3

0.1

to

0.5

3

49.1

35.0

to

68.0

3

2.3

0.2

tc

3.3

3

0.1

0.01 tc

0.2

3

Water temperature (*C.)

Salinity (%. )

pH

Depth (m.)

Sediment type

Granules (wt. %)

Sands (wt. %)

Silts (wt. %)

Clay (wt. %)

CaC03(wt. %)

Organic carbon (wt. %)

Organic nitrogen (wt. %)

Mean grain size,
total sample (0)

Standard deviation,
total sample (0)

Skewness, total sample

Kurtosis, total sample

Mean grain size,
noncarbonate fraction (0)

Standard deviation,
noncarbonate fraction (0)

Mean grain size,
carbonate fraction (0)

Standard deviation,
carbonate fraction (0)

1.3

1.3

0.3
4.6

4.4

1.7

-0.3

1.1

0.6 to 1.6

1.2 to 1.5

0.2 to 0.6

2.1 to 8.4

1*7 to 5.9

1.1 to 2.1

-0.1 to 0.1

0.9 to 1.3

Figure 3. — Diagnostic features of Polyodontes sp. and
Pholoe sp.

Polyodontes sp.

Pholoe sp. :

(A) Parapodium fron\, a median sec-
tion (B) Upper neuroseta from
same parapodium (C) Middle neuro-
seta from same parapodium (D)
Ventral neuroseta from same para-
podium

(E) Parapodium from median sec-
tion (F) Notoseta from same para-
podium (G) Neuroseta from same
parapodium (H) Elytruro (I) Margin
of elytrum greatly enlarged.

115

0.10MM

FIGURE 3

F

0 01 MM

0.02MM

116

Family PISIONIDAE Southern, 1914

Pisionids are a rare group of small, temperate and

tropical polychaetes. All have chltlnous jaws, and in

addition, some have a pair of peristomial acicula directed

forward at an oblique angle that may act as accessory jaws.

The jaw apparatus is indicative of a predatory mode of

feeding. A single specimen of one species (Pisione remota)

was found in Tampa Bay.

Pisione remota (Southern, 1914)
(Described and illustrated by Hartraan, 1968)

An anterior fragment was collected at station 17-3 in
lower Tampa Bay (table 26).

Sediment at this station was coarse sand that consisted
of poorly sorted shell particles and fine sand grains. It
contained very little organic carbon (table 27).

No bottom vegetation was noted at the collection site.

The specimen collected was mature, but not gravid.

P. remota was originally described from Ireland, and
is otherwise known only from southern California and west-
ern Mexico in coarse sands.

117

Table 26. — Plsione reroota — Locality records and number
of individuals from survey stations, Tampa
Bay, Florida, 1963-69 (D-dredge, S-shovel,
N-net)

Lower Tampa Bay

Stations

Individuals Stations

Individuals

D S N

D S N

17-3

1

118

Table 27. — Plslone remota — Mean and range of observed
environmental factors from survey stations,
Tampa Bay, Florida, 1963-69

Factor

Mean

Range

Number
observations

Water temperature (*C.) 24.2

Salinity (%.) 34.0

pH 8.0

Depth (m.) 2.3

Sediment type sand

Granules (wt. %) 5.6

Sands (wt. %) 93.6

Silts (wt. %) 0.7

Clay (wt. %) 0.1

CaC03(wt. %) 85.2

Organic carbon (wt. %) 0.3

Organic nitrogen (wt. %) 0.02

Mean grain size,

total sample (0) 0.5

Standard deviation,

total sample (0) 1.1

Skewness, total sample 0.8

Kurtosis, total sample 8.2

Mean grain size,

noncarbonate fraction (0) 2.9

Standard deviation,
noncarbonate fraction (0) 1.7

Mean grain size,

carbonate fraction (0) 1.1

Standard deviation,

carbonate fraction (0) 0.8

119
Family CHRYSOPETALIDAE Ehlers, 1864

This temperate and tropical family contains only four
genera of small worms that are found associated with plants
and fouling organisms, or among crevices on solid substrata
and coarse shell fragments. Nothing is known about their
feeding habits, but judging from their mobility, they are
probably omnivorous feeders that consume small organisms
and bits of detritus.

The single species recorded was found in all areas of
Tampa Bay except Hillsborough Bay.

Paleanotus heteroseta Hartman, 1945

This species was collected at a total of 47 stations
in five areas of Tampa Bay. The largest collection (132)
came from a dredge haul at station 16-13 in lower Tampa
Bay. No specimens were collected north of transect-6 in
the more brackish waters of Old Tampa Bay (table 28).

Average sediment type at dredge and shovel stations
was poorly sorted sand with about four percent silt and
clay and a fairly high percentage of coarse shell fragments.
The non-carbonate sediment was mainly fine sand with less
than one percent organic carbon (table 29).

Algae were recorded at about one-third of the dredge
and shovel stations, and in addition, shoal grass, manatee

120

grass, and turtle grass were collected at one or more
stations. In general, P. heteroseta was found at water
depths of about 2 m. which Is about the lower limit for
growth of sea grasses In most areas of the Estuary.

Neither gravid nor juvenile individuals were
collected.

P. heteroseta has been collected along the Atlantic
seaboard in North Carolina and in the Gulf of Mexico.

121

Table 28. — Paleanotus heteroseta — Locality records and
number of individuals from survey stations,
Tampa Bay, Florida, 1963-69 (D-dredge, S-
shovel, N-net)

Old Tampa Bay

Stations

Individuals Stations

Individuals

D S N

D S N

6-1-A
6-2

1 6-3
6

6

Upper Tampa Bay

10-3

11-6

1

11-21

1

11-22

2

12-3

3

12-6

1

12-10

3

12-11

4

12-12

1

12-13

13-3

37

13-5

3

13-6

2

13-7

1

13-8

30

13-10

34

Boca Ciega Bay

BC-N
D-23

6

1

PB-1
15-14

1
1

Terra Ceia Bay

E-8

1

122

Table 28. — Paleanotus heteroseta — Locality records and
number of individuals from survey stations,
Tampa Bay, Florida, 1963-69 (D-dredge, S-
shovel, N-net)-(continued)

Lower Tampa Bay

Stations

Individuals Stations

Individuals

D S N

D S N

14-12

5

15-22

1

15-23

33

15-24

8

15-25

51

15-26

45

15-27

1

15-28

5

15-30

1

15-32

1

16-12

16-13

132

34

16-14

56

16-15

75

16-16

4

16-17

3

16-27

5

17-2

21

17-3

123

17-4

27

17-5

1

17-7

4

18-3

60

12 3

Table 29. — Paleanotus heteroseta — Mean and range of

observed environmental factors from survey
stations, Tampa Bay, Florida, 1963-69

Factor

Mean

Range

Number
observations

Water temperature (*C.)

Salinity (%«)

pH

Depth (m. )

Sediment type

Granules (wt. %)

Sands (wt. %)

Silts (wt. %)

Clay (wt. %)

CaC03(wt. %)

Organic carbon (wt. %)

Organic nitrogen (wt. %)

Mean grain size,
total sample (0)

Standard deviation,
total sample (0)

Skewness, total sample

Kurtosis, total sample

Mean grain size,
noncarbonate fraction (0)

Standard deviation,
noncarbonate fraction (0)

Mean grain size,
carbonate fraction (0)

Standard deviation,
carbonate fraction (0)

22.8

15.0

to

31.8

29.6

20.1

to

34.6

8.0

7.6

to

8.3

2

D-

to

4-0

sand

shelly sand to
silty sand

4.2

0.6

to

21.5

91.8

24.5

to

99.2

1.8

0.1

to

19.0

2.2

0.1

to

13.1

33.7

0.6

to

90.1

0.8

0.1

to

6.9

0.1

0.0

to

0.2

1.9

1.4

0.1
5.0

2.9

1.3

0.1

1.2

0.4 to 7.1

0.7 to 2.7

-1.7 to 2.1

-0.6 to 23.9

1.7 to 5.9

0.6 to 3.2

-2.5 to 1.7

0.8 to 2.1

45
45
43
45
42

42
42
42
42
42
38
36

42

42
42
42

40

40

3 2
32

124

Family AMPHINOMIDAE

These temperate and tropical worms lack jaws and

feed on sessile animals by sucking out body juices with

their everslble probosces. They inhabit crevices and are

often found crawling on rocks and timbers, of the two

species collected in Tampa Bay, Pseudeurvthoe amblgua was

distributed in all six areas and Euphrosvne triloba was

found at only one station in lower Tampa Bay.

Key to AMPHINOMIDAE Collected in Tampa Bay

1 Body linear; prostomium with a single

median antenna Pseudeurvthoe amblgua

- Body oval; prostomium with a median and

2 lateral antennae Euphrosvne triloba

Euphrosvne triloba Ehlers, 1887
This species was collected in a net haul at station
18-3 near Egmont Key. Salinity in that locality is above
30 parts per thousand and sediments are shelly sand (table 30).

E. triloba was described by Ehlers from collections
at depths of 10 fathoms or more at three localities in the
Gulf of Mexico. To my knowledge it has not been recorded
since his original report.

125

Table 30. — Euphrosyne triloba — Locality records and num-
ber of individuals from survey stations, Tampa
Bay, Florida, 1963-69 (D-dredge, S-shovel, N-
net)

Lower Tampa Bay r>

Stations

Individuals Stations

Individuals

D S N

D S N

18-3

1

126

Pseudeurythoe amblgua (Monro, 1933)
(Described and illustrated by Monro, 1937)

Collections of P. ambiqua were made at 56 survey
stations and at two incidental localities (Mobbly Bay and
Mullet Key) for a total of 58 records. It is represented
in all areas of the Estuary, but was taken in greatest
numbers from the brackish waters of Old Tampa Bay. There,
the largest number of individuals per dredge haul (40)
came from station 1-3 (table 31).

Average sediment type at dredge and shovel stations
was sand, but the worm was also found in shelly sand and
very soft bottoms. Average silt and clay content was over
18 percent, shell was 12 percent, and organic carbon was
nearly one percent (table 32).

One-third of the dredge and shovel samples contained
algae, and at one locality sea grasses included turtle
grass, shoal grass, manatee grass, and Halophlla.

No individuals were collected with mature gametes but
juveniles were found in June, July, August, September,
October and November.

This species was originally described from the Pacific
side of Panama and was first recorded in the Atlantic at
Beaufort, North Carolina by Hartman (1945). This report is
the first record for P. ambiqua from the Gulf of Mexico.

127

Table 31. — Pseudeurythoe ambiqua — Locality records and
number of individuals from survey stations,
Tampa Bay, Florida, 1963-69 (D-dredge, S-
shovel, N-net)

Old

Tampa

Bay

Stations

Individuals

Stations

Indiv

.duals

D

S N

D

S

N

B-2

36

3-9

1

1-1

1

4-3

1

1-3

40

10

4-4

2

1-4

11

3

4-9

1

1-5

6

4-13

1

3-1-A

1

5-1-A

8

3-4

22

1

6-1-A

1

3-5

37

1

6-1-D

1

3-6

2

6-2

3

3-7

1

Hills

borough Bay

C-3

4

9-8

1

C-9

1

10-22

3

9-4

1

Upper

Tampa

Bay

10-3

1

11-14

1

3

10-12

1

11-19

1

11-1

2

11-27

5

11-7

4

11-28

5

11-8

1

1

11-28-1

7

11-9

12

13-1-A

fi

11-11

4

9

13-1-B

4

11-12

2

3

13-3

1

11-13

2

2

128

Table 31. — Pseudeurythoe ambigua — Locality records and
number of individuals from survey stations,
Tampa Bay, Florida, 1963-69 (D-dredge, S-
shovel, N-net)-(continued)

Boca Ciega Bay

Stations

Individuals Stations

Individuals

D

S

N

D S N

BC-I
D-18
15-13

1

1

5

16-4
16-5

2

1

Terra Ceia Bay

E-7

2

Lower Tampa Bay

16-9-B

16-10

1

16-20

7

16-27

1

17-3

1

17-7
17-8
17-9
18-3

129

Table 32. — Pseudeurythoe amblqua — Mean and range of ob-
served environmental factors from survey
stations, Tampa Bay, Florida, 1963-69

Factor

Mean

Range

Number
observations

Water temperature (*C.)

Salinity (%. )

PH

Depth (m.)

Sediment type

Granules (wt. %)

Sands (wt. %)

Silts (wt. %)

Clay (wt. %)

CaC03(wt. %)

Organic Carbon (wt. %)

Organic nitrogen (wt. %)

Mean grain size,
total sample (0)

Standard deviation,
total sample (0)

Skewness, total sample

Kurtosis, total sample

Mean grain size,
noncarbonate fraction (0)

Standard deviation,
noncarbonate fraction (0)

Mean grain size
carbonate fraction (0)

Standard deviation,
carbonate fraction (0)

27.5

15.0 to 32.0

52

26.5

16.2 to 34.9

52

7.9

7.0 to 8.5

42

1.0

[\ to 3.1

52

sand

shelly sand to
clayey silt

52

3.6

0.0 to 46.2

52

78.0

6.4 to 99.6

52

9.3

0.0 to 51.0

52

9.0

0.0 to 65.9

52

12.4

0.6 to 85.2

51

0.7

0.04 to 3.8

35

0.1

0.0 to 0.9

35

3.2

-0.8 to 7.2

51

1.6

0.6

to

2.7

51

0.4

-0.9

to

3.4

51

9.0

-0.6

to

73.5

51

3.1

2.0

to

7.2

5?

1.5

0.6

to

2.8

52

0.4

-2.6

to

2.4

46

1.3

0.4

to

2.7

46

130

Family PHYLLODOCIDAE Williams. 1851
The Phyllodocids comprise a large group of errant
predators that have world-wide distribution, and are asso-
ciated with a variety of sediment types as well as crevices
in shells and solid substrata. Day (1967) noted that the
genus Eteone is the only one that contains burrowing forms.
In Tampa Bay, five representatives of the family were
collected. Two species, Eteone heteropoda and Phyllodoce
arenae, were found in all areas of the Estuary; two were
absent only in Hillsborough Bay, Eumida sanguinea and
Phyllodoce fragills; and Paranaltis speciosa was found
everywhere except Hillsborough Bay and Terra Ceia Bay.
Although three species were unrecorded in some areas, all
five occurred at some stations near both the mouth and head-
waters of the Estuary.
Key to PHYLLODOCIDAE Collected in Tampa Bay

1 Two pairs of tentacular cirri Eteone heteropoda

- Four pairs of tentacular cirri 2

2 Four frontal antennae, and 1 median

antenna „ Eumida sanguinea

- Four frontal antennae, and no median antenna 3

3 Prostomium ovate; tentacular segments 1

and 2 fused Paranaltis speciosa

- Prostomium cordate; tentacular segments separate .... 4

131

4 Occipital papilla present; dorsum with transverse
bands of dark pigment; dorsal cirri broad and thin;
proboscis distinctly papillate except on dorsal
surface Phyllodoce arenae

- No occipital papilla; dorsum not banded with

pigment; dorsal cirri broad and thick; proboscis
covered with minute papillae Phyllodoce fragllis

Eteone heteropoda Hartman, 1951

Individuals were collected in all areas of the Estuary
at 55 survey stations and incidental localities at Booth
Point, Old Tampa Bay; McKay Bay, Hillsborough Bay; and
Mullet Key, lower Tampa Bay. This species seems best a-
dapted to conditions in Boca Clega Bay, Terra Ceia Bay, and
the Estuary north of transect-13 as only five collections
came from lower Tampa Bay. The greatest number of indivi-
duals per dredge haul (51) came from station C-2 in Hills-
borough Bay (table 33).

Although the worm was collected in a variety of sedi-
ments, the average bottom type was poorly sorted, fine sand
with about four percent silt and clay, a small amount of
coarse shell, and less than one percent organic carbon
(table 34).

All collections came from shallow water, and vegetation
was recorded at about one-third of the survey stations. Algae
were the most common plants. Turtle grass, shoal grass,
manatee grass, and Halophila were also present at one or

132

more stations.

Gravid specimens were collected in June, July, and
August, while juveniles were found in June, July, August,
November, and December.

E. heteropoda was originally described from the Gulf
of Mexico and is otherwise known from Maine to Florida. It
is one of the few polychaetes previously reported from
Tampa Bay where Simon (1965) made observations on its
predatory behavior.

133

Table 33. — Eteone heteropoda — Locality records and number
of individuals from survey stations, Tampa Bay,
Florida, 1963-69 (D-dredge, S-shovel, N-net)

Old Tampa Bay

Stations Individuals Stations Individuals

A-3

1

A-6

6

B

3

B-3

2

1-2

2

1-4

3-3

6

3-8

2

3-9

1

3-11

2

4-2

1

4-5

1

4-12

1

5-3

3

5-4

1

5-5

3

6-8

Hillsborough Bay

C 5 C-8-1 1

C-l 8 8-6 5

C-2 51 8-8 2

C-4 13 8-9 18 6

Upper Tampa Bay

10-0

10-4

2

10-12

4

10-13

4

10-14-A

14

11-1

2

11-21

1

13-1-A

2

Boca Ciega Bay

BC-A

2

BC-E

1

BC-N

1

D-l

1

D-2

3

D-5

D-ll

4

D-l 7

PB-1 7

PB-4 12
PB-5 2

15-2 4

15-9 1

15-10 1

16-4 1

16-6 4

134

Table 33. — Eteone heteropoda — Locality records and number
of individuals from survey stations, Tampa Bay,

Florida, 1963-69 (D-dredge, S-shovel, N-net)

(continued)

Terra Ceia Bay

Stations

Individuals Stations

Individuals

D S N

D S N

E-5

1 E-7

1

Lower Tampa Bay

14-19
16-27

6 17-12
1 17-13

1

1

135

Table 34. — Eteone heteropoda — Mean and range of observed
environmental factors from survey stations,
Tampa Bay, Florida, 1963-69

Number
Factor Mean Range observations

Water temperature (*C.)

Salinity (%. >

PH

Depth (m.)

Sediment type

Granules (wt. %)

Sands (wt. %)

Silts (wt. %)

Clay (wt. %)

CaC03(wt. %)

Organic carbon (wt. %)

Organic nitrogen (wt. %)

Mean grain size,

total sample (0) 2.5 -1.9 to 4.1 52

Standard deviation,
total sample (0)

Skewness, total sample

Kurtosis, total sample

Mean grain size,
noncarbonate fraction (0)

Standard deviation,
noncarbonate fraction (0)

Mean grain size,
carbonate fraction (0)

Standard deviation,
carbonate fraction (0)

26.3

14.5 to 34.1

52

26.3

15.1 to 34.3

52

7.9

6.7 to 8.4

44

1.0

£1 to 2.1

52

sand

shelly sand to
silty sand

52

2.7

0.0 to 72.9

52

93.0

27.1 to 99.9

52

2.9

0.0 to 26.8

52

1.5

0.0 to 13.1

52

7.5

0.05 to 75.6

52

0.5

0.01 to 1.6

27

0.04

Oi-00 to 0.1

25

1.2

0.5

to

2.7

52

0.5

-1.7

to

3.6

52

13.5

0.4

to

77.3

52

3.1

1.8

to

3.9

47

1.5

0.6

to

3.1

47

-0.4

-2.5

to

1.8

45

1.3

0.4

to

2.3

45

136

Eumlda sangulnea (Oersted, 1843)
(Described and illustrated by Pettlbone, 1963a)

This small worm was collected at 40 survey stations,
and was found in all areas of the Estuary except Hills-
borough Bay. E. sanguinea was especially well represented
in Boca Ciega Bay where 108 specimens were collected in
a single dredge haul from station BC-N (table 35).

Average sediment type at dredge and shovel stations
was very poorly sorted, fine sand with a considerable
quantity of coarse shell, four percent silt and clay, and
one percent organic carbon (table 36).

One-third of the bottom samples contained algae, and
shoal grass, turtle grass, or widgeon grass were recorded
in a few.

Specimens with mature gametes were collected in
November and January, and juveniles were noted in August,
September, and October.

E. sangulnea has a world-wide distribution in tropi-
cal, temperate, and boreal seas.

137

Table 35. — Eumlda sanquinea — Locality records and number

of individuals from survey stations, Tampa Bay,
Florida, 1963-69 (D-dredge, S-shovel, N-net)

Old Tampa Bay

Stations

Individuals

Stations

Individuals

B

B-l
2-3
3-12

3-14
6-1-C
6-2
6-3

BC-I

2

BC-M

1

1

BC-N

108

5

D-2

1

1

D-17

1

D-24

1

D-2 5

1

PB-1

25

FB-4

31

1

15

Upper Tampa Bay

10-4

8 12-9

1

Boca Ciega Bay

PB-5

3

4

14-4

3

15-3

1

15-4

1

15-11

1

15-12

5

15-13

1

15-14

4

16-2

4

Terra Ceia Bay

E-l
E-3

E-4
E-8

Lower Tampa Bay

14-6

14-9

14-12

14-13

14-18

15-24

1

15-29

16-11

2

16-14

2

138

Table 36. — Eumlda sangulnea — Mean and range of observed
environmental factors from survey stations,
Tampa Bay, Florida, 1963-69

Factor

Mean

Water temperature Cc.)

Salinity («„)

PH

Depth (m.)

Sediment type

Granules (wt. %)

Sands (wt. %)

Silts (wt. %)

Clay (wt. %)

CaC03 (wt. %)

Organic carbon (wt. %)

Organic nitrogen (wt. %)

Mean grain size,
total sample (0)

Standard deviation,
total sample (0)

Skewness, total sample

Kurtosis, total sample

Mean grain size,
noncarbonate fraction (0)

Standard deviation,
noncarbonate fraction (0)

Mean grain size,
carbonate fraction (0)

Standard deviation,
carbonate fraction (0)

Range

Number
observations

22.6

14.5

to

31.8

30.1

23.8

to

33.5

8.1

7.7

to

8.4

1.1

n

to

3.3

sand

sand
sand

to

silty

4.6

0.0

to

14.7

91.0

78.1

to

98.8

2.8

0.0

to

13.8

1.2

0.0

to

8.0

16.4

1.3

to

68.0

1.0

0.1

to

3.3

0.1

0.01

tc

0.2

2.2

2.2

0.0
5.3

3.4

1.5

-0.1

1.3

0.6 to 3.1

0.6 to 3.1

-1.7 to 1.6

0.1 to 13.3

2.5 to 6.1

0.7 to 3.4

-1.9 to 3.0

0.2 to 2.3

21

21

20
21
19

19
19
19
19
19
11
11

19

19
19
19

16

16

IS

15

139

Paranaitls speclosa (Webster, 1880)
(Described and Illustrated by Pettibone, 1963a)

This species Is less common in Tampa Bay than other
phyllodocids, and was found at only two incidental stations
(Bunces Pass and Mullet Key) and 17 survey stations. No
collections were made in Hillsborough or Terra Ceia Bays
(table 37).

Specimens were found mostly in poorly sorted, fine
sand that contained more than five percent silt and clay,
over one percent organic carbon, and numerous, large shell
fragments (table 38).

Vegetation, that consisted of algae, shoal grass, and
turtle grass, was recorded at one station.

No gravid specimens were collected, but one juvenile
was present in a November sample.

P. speclosa occurs from Maine to Florida and has been
recorded In the Gulf of Mexico.

140

Table 37. — Paranaltls speciosa — Locality records and

number of Individuals from survey stations,
Tampa Bay, Florida, 1963-69 (D-dredge, S-
shovel, N-net)

Old Tampa Bay

Stations

Individuals Stations

Individuals

D

s

N

D S N

3-8
3-9
3-12

1
1
2

4-1 7-A
4-18-A
6-4-A

1
1

i

Upper Tampa Bay

11-4

1

Boca Ciega Bay

BC-I
BC-M
15-6

1

2
2

15-8
15-12
1 16-6

1

1
5

Lower Tampa Bay

17-2

17-4

1
2

17-6
17-13

1
3

141

Table 38. — Paranaltls speclosa — Mean and range of observed
environmental factors from survey stations,
Tampa Bay, Florida, 1963-69

Factor

Mean

Range

Number
observations

Water temperature (*C.)

Salinity (%.)

PH

Depth (m.)

Sediment type

Granules (wt. %)

Sands (wt. %)

Silts (wt. %)

Clay (wt. %)

CaC03 (wt. %)

Organic carbon (wt. %)

Organic nitrogen (wt. %)

Mean grain size,
total sample (0)

Standard deviation,
total sample (0)

Skewness, total sample

Kurtosis, total sample

Mean grain size,
noncarbonate fraction (0)

Standard deviation,
noncarbonate fraction (0)

Mean grain size,
carbonate fraction (0)

Standard deviation,
carbonate fraction (0)

25.7

17.0

to

31.2

17

29.4

24.5

to

34.5

17

8.1

7.8

to

8.5

13

1.1

o-

to

4.0

17

sand

sand
sand

to

silty

17

1.0

0.0

to

6.1

17

93.7

72.5

CO

99.4

17

3.8

0.2

to

22.1

17

1.5

0.n3

to

5.2

17

17.0

1.2

tc

66.0

17

1.1

0.1

to

8.5

14

0.1

0.0]

to 0.2

14

2.7

1.3 to 4.1

17

1.3

0.7 to

2.0

17

1.0

-0.2 to

2.2

17

11.9

-0.04 to

25.9

17

3.5

2.5 to

9.0

17

1.5

0.5 to

3.2

17

-0.6

-2.3 to

2.3

14

1.3

0.6 to

2.9

14

142

Phyllodoce arenae Webster, 1879
(Described and illustrated by Pettibone, 1963a)

P. arenae was the Phyllodocid most commonly collected
in the Estuary. Two incidental collections (northwest end
of the Pinellas County Bayway and near Gandy Bridge) and
collections at 192 survey stations amounted to a total of
194 localities for this species from all areas of Tampa
Bay.

It was found in greatest abundance in Old Tampa Bay,
and upper and lower Tampa Bay. The most individuals per
dredge haul (332) were recorded at station 6-2 (table 39).

Sediment data show that P. arenae was generally found
in sand, but also occurred in shelly sand and in very soft
sediments. Average sediment was poorly sorted, fine sand
with over six percent silt and clay, less than one percent
organic carbon, and a considerable amount of fine shell
(table 40).

Algae were present in 62 or about 35 percent of the
dredge and shovel samples. Other plants noted at some sta-
tions were shoal, turtle, and manatee grass.

Specimens with mature gametes were collected in June,
July, September, and December. Juveniles were noted in
June, July, August, September, October, November, and
December.

143

This species occurs from Maine to New Jersey, and
has not been previously reported from the Gulf of Mexico.

144

Table 39. — Phyllodoce arenae — Locality records and number
of individuals from survey stations, Tampa Bay,
Florida, 1963-69 (D-dredge, S-shovel, N-net)

Old Tampa Bay

Stations

Individuals

Stations

Individuals

A-6

3

4-12

7

2

B

7

2

4-13

2

26

1-3

3

4-14

1

1-4

2

2

4-15

7

5

1-5

2

1

4-16

16

10

3-2

1

4-1 7-A

7

3-4

1

1

4-18-A

1

3-5

1

4-19

13

22

3-6

2

5-3

2

3-8

2

5-6

1

3-9

1

5-8

1

3-10

1

5-11

3

3-11

11

1

5-12

11

10

3-12

16

8

5-13

5

4-1

1

6-1-A

3

4-2

2

6-2

332

23

4-6

1

6-3

12

71

4-7

1

2

6-4-A

3

1

4-9

1

6-5

11

4-11

4

6-6

2

3

Hillsborough Bay

C-3
9-3
9-4
9-6
10-15

10-16

13

4

2

10-1'7

4'

5

10-19

5

19

2

10-20

1

17

10-21

145

Table 39. — Phyllodoce arenae — Locality records and number
of individuals from survey stations, Tampa Bay,
Florida, 1963-69 (D-dredge, S-shovel, N-net)-
(continued)

Upper Tampa Bay

Stations

Individuals Stations

Individuals

D S N

D S N

D

2

10-3

2 15

10-4

13

46

10-6

3

10-7

3

10-8

6

10-9

7

10-10

1

10-11

1

10-12

3

10-14-A

5

1

11-3

11

7

11-4

9

1

11-5

18

11-6

1

11-8

5

11-9

2

5

11-10

1

11-12

1

2

11-13

1

11-15

1

11-16

4

8

11-17

2

11-18

1

1

11-19

1

2

11-20

12

11-21

3

56

11-22

2

21

11-23

1

11-24

2

4

11-25

5

13

11-26

9

10

11-27

8

7

11-28

1

11-28-1

40

11-28-2

4

12-1

6

12-2

2

12-3

3

12-4

2

12-5

5

12-6

2

12-7

9

1

12-8

7

12-9

1

12-10

3

12-11

1

12-12

1

12-14

19

12-15

2

13-1-A

18

13-1-B

4

13-4

1

13-5

4

13-8

1

13-11

1

146

Table 39. — Phyllodoce arenae — Locality records and number
of individuals from survey stations, Tampa Bay,
Florida, 1963-69 (D-dredge, S-shovel, N-net)-
(continued)

Boca Ciega Bay

Stations

Individuals Stations

Individuals

D S N

D S N

BC-A

25

BC-M

3

BC-N

27

D-2

3

D-ll

2

1

D-13

1

D-17

1

2

D-22

1

D-24

1

D-25

3

PB-1

1

10

PB-4

2

PB-5

2

14-2

7

14-3

7

14-4

7

15-12

15-13

2

15-14

1

15-17

1

16-1

16-6

19

16-7

1

16-8

Terra Ceia Bay

E-l
E-2
E-3
E-4

60
1

E-5
E-6
E-7
E-8

147

Table 39. — Phyllodoce arenae — Locality records and number
of individuals from survey stations, Tampa Bay,
Florida, 1963-69 (D-dredge, S-shovel, N-net)-
( continued)

Lower Tampa Bay

Stations

Individuals Stations

Individuals

D S N

D S N

14-5

20

14-6

12

14-7

2

14-8

8

14-9

1

14-10

2

14-11

1

14-14

1

14-16

2

14-17

1

14-18

3

14-19

15-18

7

15-19

1

15-20

4

15-21

6

15-22

16

15-23

9

15-25

13

15-26

4

15-27

7

15-28

2

15-29

5

15-30

15

15-31

44

15-32

14

15-33

16-9

2

16-9-A

2

16-9-B

4

16-10

2 1

16-11

3

16-13

8

16-14

1

16-15

9

16-16

4

16-17

2

16-19

2

16-20

1 1

16-21

3

16-22

6

16-23

2

16-24

5

16-27

28

17-2.

6

17-4

4

17-5

9

17-6

26

17-7

4

17-8

8

17-9

3

17-12

2

17-13

6

17-14

1

148

Table 40. — Phyllodoce arenae — Mean and range of observed
environmental factors from survey stations,
Tampa Bay, Florida 1963-69

Factor

Mean

Range

Number
observations

Water temperature (,C.)

Salinity (%.)

PH

Depth (m.)

Sediment type

Granules (wt. %)

Sands (wt. %)

Silts (wt. %)

Clay (wt. %)

CaC03(wt. %)

Organic carbon (wt. %)

Organic nitrogen (wt. %)

Mean grain size,
total sample (0)

Standard deviation,
total sample (0)

Skewness, total sample

Kurtosls, total sample

Mean grain size,
noncarbonate fraction (0)

Standard deviation,
noncarbonate fraction (0)

Mean grain size,
carbonate fraction (0)

Standard deviation,
carbonate fraction (0)

24.4

13.0 to 32.7

177

28.1

16.4 to 34.8

177

8.0

7.1 to 8.4

163

1.1

£1 to 4.0

177

sand

shelly sand to
silty clay

172

2.4

0.0 to 79.7

172

91.9

4.6 to 100

172

3.5

0.0 to 52.6

172

2.7

0.0 to 65.9

166

13.9

0.6 to 68.0

166

0.7

0.02 to 8.5

136

0.04

0.00 to 0.2

136

2.6

-4.0 to 7.3

1.3 0.4 to 3.0
0.5 -1.6 to 2.4

11.7 -0.8 to 62.5

3.1 1.4 to 9.0

1.4 0.4 to 3.4
0.0 -2.6 to 3.0

1.2 0.2 to 3.1

171

171
171
170

166

166

147

147

149

Phyllodoce fragilis Webster, 1879b

Individuals were collected at 44 survey stations,
and were found associated with oysters at incidental sta-
tions in Old Tampa Bay, and upper Tampa Bay. Hillsborough
Bay is the only area of the Estuary where this species was
not collected (table 41).

Average sediment type at dredge and shovel stations
was poorly sorted sand with less than five percent silt
and clay, and a considerable quantity of shell, organic
carbon content was about one percent (table 42).

Algae were present in more than half of the bottom
samples and several also had shoal grass, turtle grass,
and manatee grass.

A gravid specimen was taken in October, and juveniles
were collected in September, October, and November.

P. fraqills is known from the western Atlantic be-
tween Virginia and Florida, and in the Gulf of Mexico.

150

Table 41. — Phyllodoce fraqills — Locality records and num-
ber of individuals from survey stations, Tampa
Bay, Florida, 1963-69 (D-dredge, S-shovel,
N-net)

Old Tampa Bay

Stations

Ind

ividuals Stations

Individuals

D

S

N

D

S N

A-1
3-1-A

5
3

5-13
6-1-D

1

2

Upper Tampa Bay

11-3
11-4

1 11-28
4 13-10

4

3

Boca Ciega Bay

BC-A 1 25 PB-4 1

BC-M 1 PB-5 1

BC-N 34 10 14-3 1

D-2 1 15-5 1

D-22 9 15-6 20

D-24 1 15-11 1

D-25 1 16-6 2

D-26 107 16-8 60

PB-1

1

Terra Ceia Bay

E-6

26

Lower Tampa Bay

14-6

1

16-14

IS

34

14-10

1

16-15

1

14-16

1

16-21

4

4

15-23

1

16-27

1

15-25

2

17-5

1

16-10

3

61

17-6

1

7

16-11

1

1

17-7

2

16-12

2

17-8

1

16-13

15

17-10

3

1

151

Table 42. — Phyllodoce fraqilis — Mean and range of observed
environmental factors from survey stations,
Tampa Bay, Florida, 1963-69

Number
Factor Mean Range observations

Water temperature (°C.)

Salinity <.%.)

pH

Depth (m.)

Sediment type

Granules (wt. %)

Sands (wt. %)

Silts (wt. %)

Clay (wt. %)

CaC03 (wt. %)

Organic carbon (wt. %)

Organic nitrogen (wt. %)

Mean grain size,

total sample (0) 2.2 0.6 to 3.6 21

Standard deviation,
total sample (0)

Skewness, total sample

Kurtosis, total sample

Mean grain size,
noncarbonate fraction (0)

Standard deviation,
noncarbonate fraction (0)

Mean grain size,
carbonate fraction (0)

Standard deviation,
carbonate fraction (0)

22.9

13.0 to 32.0

22

30.5

24.1 to 33.9

22

8.0

7.1 to 8.4

21

1.0

i_\ to 3.0

22

sand

shelly sand to
sandy clay

21

5.8

0.0 to 34.5

21

90.2

58.0 to 99.4

21

2.9

0.3 to 12.2

21

1.1

0.1 to 7.2

21

18.0

0.9 to 68.0

21

1.0

0.1 to 3.3

18

0.04

0.00 to 0.19

18

1.6

0.6

to

3.8

21

0.3

-1.3

to

3.4

21

0.9

-0.7

tc

73.5

21

3.4

2.1

to

6.1

21

1.3

0.5

to

2.3

21

0.3

-0.9

to

3.0

17

1.2

0.2

to

2.8

17

152

Family HESIONIDAE Malmgren. 1867
This family has world-wide representation in seas
at all latitudes, and contains very active, errant worms
that are generally regarded as predators (Day, 1967). Al-
though most hesionids are free living, some live associated
with other organisms as commensals.

Five species were collected in Tampa Bay. Two, Heslone
plcta and Podarke obscura, were found only in the high
salinity areas of the Estuary seaward of transect-13. The
other three, Gyptis vittata, Gyptls sp., and Paraheslone
luteola, are apparently less limited by salinity and were
collected in both upper and lower reaches of the Estuary.
Key to HESIONIDAE Collected in Tampa Bay

1 Median antenna absent; 6 to 8 pairs of

tentacular cirri 2

- Median antenna present; 6 to 8 pairs of

tentacular cirri 3

2 Eight pairs of tentacular cirri Heslone picta

- Six pairs of tentacular cirri Parahesione luteola

3 Eight pairs of tentacular cirri.......... 4

- Six pairs of tentacular cirri Podarke obscura

4 Numerous notosetae with spinous margin

and capillary tip Gyptis sp.

- Less than 12 capillary notosetae with

smooth margins Gyptis vittata

153

Hesione plcta Muller, 1858

(Described and Illustrated by Ehlers. 1887

as Hesione vlttlgera)

Specimens were collected in Boca Ciega Bay at one

survey station (D-25) and at several incidental localities

where they were associated with oysters and sponges (table

43).

Neither gravid nor Juvenile worms were found

H. picta is known from the tropical, western Atlantic

and the Gulf of Mexico.

154

Table 43. — Hesione picta — Locality records and number of
individuals from survey stations, Tampa Bay,
Florida, 1963-69 (D-dredge, S-shovel, N-net)

Boca Ciega Bay

Stations

Individuals Stations

Individuals

D S N

D S N

D-25

1

155

Gyptis vlttata Webster and Benedict, 1887
(Described and illustrated by Pettibone, 1963a)

Individuals were collected at 138 survey stations, in
all areas of the Estuary, and at four incidental localities
in Old Tampa Bay, Hillsborough Bay, and Boca Ciega Bay. The
worm was most abundant at station 11-9 in upper Tampa Bay
where 28 specimens were collected in a single dredge haul
(table 44).

Average sediment at dredge and shovel stations was poor-
ly sorted, very fine sand. The content of silt and clay was
over 13 percent, organic carbon was one percent, and shell
was under 10 percent (table 45).

The bottom at nearly one-third of these stations was
vegetated with algae and one or more of the following sea
grasses: turtle grass, shoal grass, manatee grass, or
Halophila.

Specimens in breeding condition were collected in July
and September, and juveniles were present in samples taken
during June, July, August, September, October, November,
and December.

G. vlttata is known from the New England coast between
Maine and Massachusetts. This is the first report for the
Gulf of Mexico.

156

Table 44. — Gyptls vlttata — Locality records and number of
individuals from survey stations, Tampa Bay,
Florida, 1963-69 (D-dredge, S-shovel, N-net)

Old Tampa Bay

Stations

Individuals

Stations

Individuals

B

2

4-8 ,

1

B-l

1

4-10

B-2

2

4-12

3

1-3

7

1

4-13

13

1-4

11

4

4-15

2

1-5

12

1

4-16

2

3-1-A

5

1

4-19

2

3-2

1

5-2

4

3-4

3

5-3

1

3-5

2

5-4

1

3-6

2

2

5-6

3

3-7

2

5-7

1

3-10

1

5-9

1

3-11

3

5-12

2

3-12

2

6-1-A

2

3-16

1

6-1-B

2

4-2

2

6-2

15

4-3

1

6-5

11

4-4

2

6-6

1

4-6

2

6-7-A

1

4-7

3

Hillsborough Bay

C-l
C-2
C-6
7-1
8-8

9-4

2

10-16

2

1

10-17

3

1

10-19

3

6

10-22

2

16

157

Table 44.— Gyptis vittata— Locality records and number of
individuals from survey stations, Tampa Bay,
Florida, 1963-69 (D-dredge, S-shovel, N-net)-
( continued)

Upper Tamp

a Bay

Stations

Individuals

Stations

Individuals

D

S

N

D

S

N

10-1-A

2

11-16

1

1 '

10-2

3

11-17

6

2

10-3

6

11-18

2

1

10-4

2

11-19

3

6

10-6

1

11-20

5

10-7

1

11-21

6

10-8

2

11-22

4

4

10-9

2

11-23

2

I

11-2

2

11-24

2

11-3

1

11-26

1

11-4

4

11-27

6

11-5

1

11-28

4

11-6

5

11-28-1

21

11-7

2

11-28-2

3

11-8

3

2

12-7

1

11-9

28

1

12-14

5

11-11

1

12-15

10

11-12

7

4

12-16

1

11-13

3

13-1-A

7

11-14

1

13-1-B

4

11-15

4

6

13-11

2

Boca Ciega

Bay

BC-A

1

PB-4

1

BC-C

2

14-2

1

BC-G

1

15-1

4

BC-I

1

15-3

4

BC-N

2

15-5

3

D-2

13

15-6

2

D-3

4

15-12

1

D-5

1

16-1

I

D-9

2

16-2

4

D-10

2

16-3

1

D-ll

7

16-4

1

D-12

1

16-5

3

D-19-A

1

1

16-8

2

D-21

1

D-23

2

158

Table 44. — Gyptis vittata — Locality records and number of
individuals from survey stations, Tampa Bay,
Florida, 1963-69 (D-dredge, S-shovel, N-net)-
(continued)

Terra Cela Bay

Stations

Individuals Stations

Individuals

D

S

N

D

S

N

E-l
E-2
E-3

1

2

3

E-4

E-6

1

4

Lower Tampa Bay

15-18

15-31

16-9-B

16-10

16-11

16-25

1
16

1

1

1
1

16-26

16-27

17-6

17-7

17-8

17-11

4
1
1
1

2

1

159

Table 45. — Gyptis vittata — Mean and range of observed
environmental factors from survey stations,
Tampa Bay, Florida, 1963-69

Number
Factor Mean Range observations

Water temperature (*C.)

Salinity (%„)

PH

Depth (m.)

Sediment type

Granules (wt. %)

Sands (wt. %)

Silts (wt. %)

Clay (wt. %)

CaC03 (wt. %)

Organic carbon (wt. %)

Organic nitrogen (wt. %)

Mean grain size,
total sample (0)

Standard deviation,
total sample (0)

Skewness, total sample

Kurtosis, total sample

Mean grain size,

noncarbonate fraction (0) 3.2 1.4 to 9.0 125

Standard deviation,

noncarbonate fraction (0) 1.4 0.4 to 2.8 125

Mean grain size,

carbonate fraction (0) -0.2 -2.6 to 3.0 116

Standard deviation,

carbonate fraction (0) 1.4 0.2 to 2.9 116

26.5

13.0 to 33.8

128

26.9

18.5 to 34.4

128

8.0

7.0 to 8.5

112

1

£1.0 to 4.0

128

sand

shelly sand to
clayey mud

126

2.8

0.0 to 79.7

126

82.6

0.9 to 99.9

126

7.8

0.0 to 56.5

126

5.9

0;0 to 65.9

126

9.9

0.7 to 58.4

125

1.0

0.01 to 8.5

76

0.1

0.00 to 0.6

76

3.1

-4.0 to 7.3

125

1.5

0.4 to 3.5

125

0.5

-1.4 to 3.4

125

10.5

-1.3 to 73.5

125

160

Paraheslone luteola (Webster, 1880)
(Described and illustrated by Pettibone, 1956)

Collections came from 58 survey stations, and all
but the three localities in Boca Ciega Bay were north of
transect-12. p. luteola is obviously well adapted to
brackish conditions and is one of the few polychaetes in
the Estuary that was commonly found throughout Hills-
borough Bay (table 46).

Average sediment at dredge and shovel stations was
poorly sorted, coarse silt with an average silt-clay con-
tent of more than 30 percent. Large shell fragments were
present at most stations, and organic carbon was slightly
less than one percent (table 47).

Only 14 percent of the bottom samples contained vege-
tation. The plants recorded were: algae, and shoal,
turtle, and manatee grass.

Both gravid and juvenile worms were collected in
August and September.

161

Table 46. — Paraheslone luteola — Locality records and

number of individuals from survey stations,
Tampa Bay, Florida, 1963-69 (D-dredge, S-
shovel, N-net)

Old Tampa Bay

Stations

In

dividuals

Stations

Ir

dividuals

D

S N

D

S

N

1-3

1

3-15

1

1-5

2

4-3

1

3-1 -A

11

4-6

1

3-4

1

4-7

3

3-5

2

4-13

5

3-7

2

Hillsb.

urough

Bay

C

42

9-3

6

11

C-2

3

29

9-4

4

13

C-3

23

9-6

13

7-1

32

3

9-7

3

8-2

1

15

9-8

7

8-3

1

9-9

9

8-4

3

10-15

2

6

8-5

2

10-16

11

15

8-7

1

12

10-17

4

1

8-8

10

37

10-21

1

8-9

1

10-22

2

9-2

4

10-23

1

Upper

Tampa

Bay

10-11

1

137

11-18

4

1

11-7

7

11-19

2

11-8

i

11-21

3

11-9

7

11-22

6

3

11-11

11

11-23

5

13

11-12

14

1

11-24

3

11-13

5

11-25

19

11-14

18

11-26

9

11-15

3

1

11-27

1

11-17

8

2

11-28

20

162

Table 46. — Paraheslone luteola — Locality records and

number of individuals from survey stations,
Tampa Bay, Florida, 1963-69 (D-dredge, S-
shovel, N-net)-(continued)

Boca Ciega Bay

Stations

Individuals Stations

Individuals

D S N

D S N

D-IS-A
D-20

1 PB-4
1

1

163

Table 47. — Parahesione lubeola — Mean and range of observed
environmental factors from survey stations,
Tampa Bay, Florida, 1963-69

Number
Factor Mean Range observations

Water temperature (#C.) 29.1 25.8 to 31.4 42

Salinity (%. ) 23.5 16.6 to 31.8 42

PH 7.8 7.0 to 8.3 35

Depth (m.) 1.2 /I to 4-0 42

Sediment type silty shelly sand to 41

sand silty clay

Granules (wt. %) 1.5 0.0 to 41.5 41

Sands (wt. %) 66.4 4.6 to 99.9 41

Silts (wt. %) 17.5 0.1 to 53.0 41

Clay (wt. %) 14.7 0.0 to 50.3 41

CaC03 (wt. %) 12.0 0.7 to 42.0 41

Organic carbon (wt. %) 0.8 0.1 to 2.3 20

Organic nitrogen (wt. %) 0.1 0.00 to 0.2 20

Mean grain size,

total sample (0) 4.1 0.9 to 7.3 41

Standard deviation,

total sample (0) 1.8 0.5 to 3.5 41

Skewness, total sample 0.4 0.8 to 1.6 41

Kurtosis, total sample 5.3 -1.2 to 28.9 41

Mean grain size,

noncarbonate fraction (0) 3.1 1.7 to 4.1 41

Standard deviation,

noncarbonate fraction (0) 1.5 0.6 to 2.5 41

Mean grain size,

carbonate fraction (0) -0.2 -2.6 to 1.7 41

Standard deviation,

carbonate fraction (0) 1.4 0.4 to 3.1 41

164

Podarke obscura Verrill, 1873
(Described and illustrated by Pettibone, 1963a)

This species was found only at localities seaward of
transect-13 where it was taken at 36 survey stations and
in three incidental samples (Johns Pass, Pass-A-Grille Chan-
nel, and lower Tampa Bay near Mullet Key). As many as 14
specimens were collected in a dredge haul in Boca Ciega
Bay at station BC-M (table 48).

Sediments at most localities were poorly sorted, fine
sand with a considerable amount of small shell fragments,
and very little silt, clay, or organic carbon (table 49).
In many instances the worm was collected from the sea
urchin Lytechinus varlegatus and not directly from sediments.

One-half of the dredge and shovel samples contained
algae and a number also had shoal grass, turtle grass,
manatee grass, and Halophila.

No sexually mature specimens were collected, but
juveniles were noted in September, October, November, and
December .

P. obscura is widely distributed in the western At-
lantic between New England and Florida, as well as in the
Caribbean and Gulf of Mexico.

165

Table 48. — Podarke obscura — Locality records and number

of individuals from survey stations, Tampa Bay,
Florida, 1963-69 (D-dredge, S-shovel, N-net)

Boca Ciega Bay

Stations

Individuals Stations

Individuals

D S N

D S N

BC-M

14

10

BC-N

3

4

D-6

1

PB-4

1

14-3

5

14-4

2

15-8

2

15-11

15-12

15-14

16-4

16-5

16-6

16-7

Terra Ceia Bay

E-5
E-7

E-8

Lower Tampa Bay

14-6

5

14-13

14-19

15-18

15-29

1

15-31

1

15-32

1

16-9-A

16-13

1

16-14

16-15

16-17

16-19

16-22

17-5

17-6

17-7

17-9

18-3

2

1

1

10

2
i
3
5

166

Table 49. — Podarke obscura — Mean and r.range of observed
environmental factors from survey stations,
Tampa Bay, Florida, 1963-69

Number
Factor Mean Range observations

Water temperature CC.)

Salinity (%„ )

pH

Depth (m.)

Sediment type

Granules (wt. %)

Sands (wt. %)

Silts (wt. %)

Clay (wt. %)

CaC03 (wt. %)

Organic carbon (wt. %)

Organic nitrogen (wt. %)

Mean grain size,

total sample (0) 2.4 1.3 to 4.1 19

Standard deviation,
total sample (0)

Skewness, total sample

Kurtosis, total sample

Mean grain size,
noncarbonate fraction (0)

Standard deviation,
noncarbonate fraction (0)

Mean grain size,
carbonate fraction (0)

Standard deviation,
carbonate fraction (0)

21.8

14.5

to

27.2

20

31.6

29.3

to

34.3

20

8.1

7.7

to

8.4

19

1.0

n

to

3.0

20

sand

sand
sand

to

silty

19

3.2

0.1

to

14.7

19

92.5

72.5

to

99.1

19

3.4

0.5

to

22.1

19

0.9

0.1

to

5.2

19

18.5

1.9

to

66.1

19

0.5

0.04 to 3.3

18

0.04

0.00 to 0.2

IS

1.3

0.7 to

2.3

19

0.3

-0.5 to

1.6

19

7.3

-0.04 to

22.2

19

3.1

2.1 to

6.1

19

1.2

0.6 to

3.1

19

0.2

-1.8 to

2.5

18

1.1

0.2 to

1.9

18

167

Gyptis sp.

This undetermined hesionid is a small worm about
1 mm. wide, including parapodia. No entire specimens
were collected, but the estimated length is 6 mm. and
there are probably about 40 setigerous segments.

The prostomlum resembles Gyptis vittata (figure 4, A)
except that some of the dorsal, tentacular cirri are quite
long. The longest extends back to setiger eight.

Notosetae are numerous and have a spinous margin
(figure 4,B). Dorsal, parapodial cirri are quite long
and are attached on the body wall (figure 4,C). Ventral
cirri were not observed, but a distal node on the ligule
indicates the probable point of origin. Neurosetae have
a striated shaft and long, falcate appendage with fine
teeth on one margin (figure 4,D,E,F).

Specimens were collected at 18 survey stations, in
all areas of the Estuary except lower Tampa Bay (table 50).

Sediment data indicate that this species, like Para-
hesione luteola, is most commonly found in silty sand
(table 51) .

The bottom at 16 percent of the dredge or shovel sta-
tions was vegetated with algae as well as one or more of

168

all five sea grasses found in the Estuary.

Gravid specimens were collected in September, but
no juveniles were seen.

169

Table 50. — Gyptis sp. — Locality records and number of

individuals from survey stations, Tampa Bay,
Florida, 1963-69 (D-dredge, S-shovel, N-net)

Old Tampa Bay

Stations

Ind

iv:

Lduals Stations

Individuals

D

S

N

D S N

1-3
1-4
1-5

1
1
1

3-10
4-15
6-1-C

1
1

1

Hillsborough Bay

8-5
10-16

1
1

1 10-17

3

Upper Tampa Bay

11-13

3

11-14

2

11-15

3

11-19 3
11-22 2

11-24 1

11-17

21

Boca Ciega Bay

16-4

1

Terra Ceia Bay

E-6

2

170

Table 51. — Gyptls sp. — Mean and range of observed environ-
mental factors from survey stations, Tampa Bay,
Florida, 1963-69

Factor

Number

Mean

Ranqe ob

servations

28.2

13.0 to 31.5

18

25.3

22.3 to 3 3.4

18

7.8

7.0 to 8.4

17

2.0

11 to 4.0

18

silty

shelly sand to

17

sand

silty clay

3.5

0.0 to 41.5

17

63.7

6.4 to 98.9

17

17.0

0.4 to 51.0

17

15.9

0.5 to 53.0

17

14.8

1.2 to 36.9

17

0.7

0.1 to 2.0

12

0.06

0.00 to 0.24

12

Water temperature (*C.)
Salinity (%. )

PH

Depth (m.)

Sediment type

Granules (wt. %)

Sands (wt. %)

Silts (wt. %)

Clay (wt. %)

CaC03 (wt. %)

Organic carbon (wt. %)

Organic nitrogen (wt. %)

Mean grain size,
total sample (0)

Standard deviation,
total sample (0)

Skewness, total sample

Kurtosis, total sample

Mean grain size,
noncarbonate fraction (0)

Standard deviation
noncarbonate fraction (0)

Mean grain size,
carbonate fraction (0)

Standard deviation
carbonate fraction (0)

4.1

0.9 to 7.4

1.9 0.8 to 3.5

0.5 -0.7 to 2.1

6.4 -0.9 to 37.5

3.1 1.7 to 4.1
1.4 0.6 to 2.2

-0.2 -2.5 to 2.4

1.2 0.4 to 1.7

17

17
17

17

17
17

17

17

Figure 4. — Diagnostic features of Gyptis sp.

Gyptis sp.i (A) Prostomium in dorsal view (B)
Notoseta from a median parapod (C)
Median parapod (D) Proximal appendage
of neuroseta from median parapod (E)
Appendages of same neuroseta showing
articulation and spinous margin on
distal member (F) Same neuroseta show-
ing falcate tip on distal member.

FIGURE4

172

A

0.50MM

17 3
Family PILARGIDAE, Saint-Joseph, 1899

The pllarglds are mostly temperate and tropical worms
with world-wide distribution. They are errant, crawling
or burrowing predators that may also feed on dead organic
matter.

The family is represented in Tampa Bay by five species.
Aside from Pilargls paclfica, which was found only in Boca
Ciega Bay, the pilargids occur in most areas of the Es-
tuary from the head waters to the Gulf on bottoms of sand
or silty sand.
Key to PILARGIDAE Collected in Tampa Bay

1 Without large, acicular notosetae. . . . Pilargis pacifica

- With large, hook shaped, acicular noto-
setae on most segments 2

2 Parapodia small, parapodial cirri short; no
median antenna; lateral antennae and tenta-
cular cirri short Cabira incerta

- Parapodia with distinct lobes and cirri;
median antenna present; median and lateral

antennae, and tentacular cirri short or long 3

3 Antennae and tentacular cirri

short Ancistrosyllls jonesl

- Antennae and tentacular cirri long 4

4 Hooked notosetae appear after setiger lO.Sigambra bassi

- Hooked notosetae appear on

setiger 4 Sigambra tentaculata

174
Ancistrosvllis jonesi Pettibone, 1966
This species was collected at 10 stations, and at two
incidental localities. One was near Pinellas County Bay-
way in Boca Ciega Bay, and the other was nearshore at
Mullet Key in lower Tampa Bay. Terra Ceia Bay was the
only area of the Estuary where no specimens were found
(table 52).

Average sediment type at survey stations was silty
sand with over 20 percent coarse shell, and silt and clay.
These sediments, however, had less than one percent organic
carbon (table 53) .

Vegetation was noted at only one of the survey sta-
tions where algae and shoal grass were recorded.

No specimens contained ripe gametes, but one juvenile
worm was collected in October.

This species was described from Chesapeake Bay where
it was dredged in mud at seven fathoms, it has not been
previously collected in the Gulf of Mexico or from any
other locality.

175

Table 52.— Ancistrosyllis j one si— Locality records and
number of Individuals from survey stations,
Tampa Bay, Florida, 1963-69 (D-dredge, S-shovel,
N-net)

Old Tampa Bay

Stations

Indiv.

Lduals Stations

Individuals

D

S

N

D S N

B-2

1

Hillsborough Bay

10-16

1

Upper Tampa Bay

11-20
11-24

1
6

11-25

1

Boca Ciega Bay

BC-A
BC-H

1
1

15-5
15-6

2
1

Lower Tampa Bay

17-4

1

176

Table 53. — Ancistrosyllis jonesl — Mean and range of ob-
served environmental factors from survey
stations, Tampa Bay, Florida, 1963-69

Number
Factor Mean Range observations

Water temperature (*C.)

Salinity (%. )

PH

Depth (m.)

Sediment type

Granules (wt. %)

Sands (wt. %)

Silts (wt. %)

Clay (wt. %)

CaC03 (wt. %)

Organic carbon (wt. %)

Organic nitrogen (wt. %)

Mean grain size,

total sample (0) 3.5 1.3 to

Standard deviation,
total sample (0)

Skewness, total sample

Kurtosis, total sample

Mean grain size,
noncarbonate fraction (0)

Standard deviation,
noncarbonate fraction (0)

Mean grain size,
carbonate fraction (0)

Standard deviation,
carbonate fraction (0)

24.7

17.0 to 32.0

9

29.3

24.6 to 34.0

9

8.1

7.9 to 8.3

9

1.1

jf\ to 3.0

9

silty
sand

sand to clayey
silt

9

1.2

0.04 to 2.8

9

77.2

11.2 to 95.6

9

12.3

1.2 to 44.4

9

9.3

0.5 to 43.8

9

25.1

1.1 to 65.5

9

0.3

0.1 to 0.6

6

0.01

0.00 to 0.07

6

1.9

1.3

to

2.6

9

0.8

-0.6

to

1.2

9

3.7

-0.3

to

6.6

9

2.8

2.3

to

3.6

9

0.8

0.5

to

1.9

9

-0.3

-2.0

to

1.7

9

1.6

0.8

to

2.9

9

177

Cablra incerta Webster, 1879
(Described and illustrated by Pettibone, 1966)

C. Incerta was collected at 12 survey stations in all
areas of the Estuary except Hillsborough Bay (table 54).

The only sediment type recorded for this species was
poorly sorted, fine sand. Average content of silt and
clay was under five percent, organic carbon was less than
one percent, and shell fragments comprised about 13 percent
of the sediment (table 55).

Vegetation was recorded at one-half of the stations.
Of these, 50 percent contained algae and some had turtle,
shoal, and manatee grass as well.

Neither sexually mature nor juvenile worms were col-
lected.

The only unquestionable record for C. incerta is from
Chesapeake Bay where it was collected in mud at seven
fathoms. This record is the first for the Gulf of Mexico
and the only other one for the species.

178

Table 54. — Cablra Incerta — Locality records and number
of individuals from survey stations, Tampa
Bay, Florida, 1963-69 (D-dredge, S-shovel,
N-net)

Old Tampa Bay

Stations Individuals Stations Individuals

D

S

N

D

S

N

4-6

1

4-12

3

Upper Tampa Bay

10-1-A
11-16

1

1

13-1-A

2

Boca Ciega Bay

PB-1

1

14-4

1

Terra Ceia Bay

E-6

1

Lower Tampa Bay

15-25
16-25

1

1

16-26
17-15

3

3

179

Table 55. — Cabira Incerta — Mean and range of observed
environmental factors from survey stations,
Tampa Bay, Florida, 1963-69

Number
Factor Mean Range observations

Water temperature (*C.)

Salinity {%.)

pH

Depth (m. )

Sediment type

Granules (wt. %)

Sands (wt. %)

Silts (wt. %)

Clay (wt. %)

CaCO, (wt. %)

Organic carbon (wt. %)

Organic nitrogen (wt. %)

Mean grain size,

total sample (0) 2.5 1.3 to 3.2 12

Standard deviation,

total sample (0) 1.3 0.9 to 2.7 12

Skewness, total sample 0.5 -1.4 to 1.5 12

Kurtosis, total sample 8.5 0.3 to 21.2 12

Mean grain size,

noncarbonate fraction (0) 2.8 1.9 to 3.7 11

Standard deviation,

noncarbonate fraction (0) 1.1 0.6 to 2.0 11

Mean grain size,

carbonate fraction (0) -0.2 -1.8 to 2.4 9

Standard deviation,

carbonate fraction (0) 1.3 0.8 to 2.0 9

23.9

13.0

to

31.0

12

28.5

23.3

to

33.5

12

8.1

7.7

to

8.3

11

1

D-

to

3.0

12

sand

sand

12

2.3

0.0

to

10.5

12

93.1

72.8

to

99.9

12

3.2

0.0

to

11.7

12

1.5

0.0

to

4.9

12

12.7

1.2

to

58.4

12

0.4

0.1

to

1.4

8

0.04

0.00 to 0.2

8

180

Pilargls paclflca Zachs, 1933

A single specimen was found at station 16-4 in Boca
Ciega Bay (table 56).

The sediment was very poorly sorted, fine sand with
a large percentage of large particles. The percentage of
silt and clay was less than six, and organic carbon was
less than one percent (table 57).

Vegetation at the collection site consisted of algae
and all local sea grasses except widgeon grass.

Neither gravid nor juvenile specimens were collected.

Prior to this report, P. pacifica was known only from
the coast of Japan.

181

Table 56. — Pllarqls paclf lea — Locality records and number
of individuals from survey stations, Tampa Bay,
Florida, 1963-69 (D-dredge, S-shovel, N-net)

Boca Ciega Bay

Stations

Individuals Stations

Individuals

D S N

D S N

16-4

1

182

Table 57. — Pllarqls paclf lea — Mean and range of observed
environmental factors from survey stations,
Tampa Bay, Florida, 1963-69

Factor

Mean

Range

Number
observations

Water temperature (*C.) 23.0

Salinity (%.) 33.4

pH 8.4

Depth (m.) 0.3

Sediment type sand

Granules (wt. %) 13.4

Sands (wt. %) 80.5

Silts (wt. %) 5.3

Clay (wt. %) 0.8

CaC03 (wt. %) 7.4

Organic carbon (wt. %) 0.3

Organic nitrogen (wt. %) 0.01

Mean grain size,

total sample (0) 2.1

Standard deviation

total sample (0) 2.3

Skewness, total sample -0.5

Kurtosis, total sample 1.5

Mean grain size,

noncarbonate fraction (0) 3.3

Standard deviation,
noncarbonate fraction (0) 0.6

Mean grain size,

carbonate fraction (0) -1.3

Standard deviation,

carbonate fraction (0) 1.1

183

Slgambra bassl (Hartman, 1945)
(Described and illustrated by Pettibone, 1966)

Specimens were collected at 13 localities in all
areas of the Estuary except Terra Ceia and Hillsborough
Bays (table 58) .

Sediments from bottom samples were mostly poorly
sorted, fine sand that contained about seven percent
silt and clay, nearly one percent organic carbon, and
more than 13 percent shell (table 59).

Four of the 13 stations were vegetated. All had
algae, and present at some were turtle grass, shoal
grass, and manatee grass.

Neither gravid individuals nor juveniles were col-
lected.

S. bassl has been recorded from east and west coasts
of the United States and the Gulf of Mexico.

184

Table 58. — Slqambra bassl — Locality records and number

of individuals from survey stations, Tampa Bay,
Florida, 1963-69 (D-dredge, S-shovel, N-net)

Old Tampa Bay

Stations

Indivi

duals Stations

Indivi

duals

D

S

N

D

S

H

1-4
1-5

3

1

4-12
4-14

1
1

Upper Tampa Bay

11-24

1

13-1-A

5

Boca Ciega Bay

D-3
D-ll

1

1

15-9
16-3

2
1

Lower Tampa Bay

15-33 1 18-4

16-13 1

185

Table 59. — Siqambra bassi — Mean and range of observed
environmental factors from survey stations,
Tampa Bay, Florida, 1963-69

Number
Factor Mean Range observations

Water temperature CO
Salinity (%. )

pH

Depth (m.)
Sediment type

Granules (wt. %)

Sands (wt. %)

Silts (wt. %)

Clay (wt. %)

CaC03 (wt. %)

Organic carbon (wt. %)

Organic nitrogen (wt. %)

Mean grain size,

total sample (0) 2.6 1.6 to 4.3 13

Standard deviation,

total sample (0) 1.5 0.6 to 2.4 13

Skewness, total sample 0.4 -1.2 to 1.7 13

Kurtosis, total sample 6.3 -0.3 to 14.8 13

Mean grain size,

noncarbonate fraction (0) 3.0 1.8 to 6.0 12

26.6

21.3

to

31.5

13

29.7

24.4

to

34.2

13

7.9

7.1

to

8.3

13

1.0

D-

to

3.0

13

sand

sand
sand

to

silty

13

2.2

0.0

to

7.4

13

91.2

81.0

to

99.4

13

4.1

0.04

1 tc

i 16.6

13

2.6

0.0

to

13.7

13

13.4

1.3

tc

49.9

13

0.7

0.1

to

3.3

7

0.04

o.oc

to

0.2

7

1.5

0.6

to

2.4

0.4

-1.2

to

1.7

6.3

-0.3

to

14.8

3.0

1.8

to

6.0

1.4

0.6

to

2.2

-0.4

-2.P5

to

0.8

1.3

0.9

to

1.81

Standard deviation,

noncarbonate fraction (0) 1.4 0.6 to 2.2 12

Mean grain size,

carbonate fraction (0) -0.4 -2.P5 to 0.8 11

Standard deviation,

carbonate fraction (0) 1.3 0.9 to 1.81 11

186

Slgambra tentaculata (Treadwell, 1941)
(Described and illustrated by Pettibone, 1966)

With the exception of Terra Ceia Bay, collections
were made throughout the Estuary at 41 stations. The
greatest numbers of the worms were recorded along tran-
sect-11 in upper Tampa Bay. As many as 37 individuals were
collected at station 11-9 (table 60).

The sediments along much of transect-11 are quite soft,
and as an average, sediment type at all dredge and shovel
stations was silty sand with over 30 percent silt and clay,
and a large proportion of fine and coarse shell particles.
Organic carbon, however, was only 0.5% (table 61).

Bottom vegetation was recorded at only four stations.
Algae were present at all of these, and noted at some were
shoal grass, turtle grass or manatee grass.

A gravid specimen was collected in September, and
juveniles were found in September and December.

S. tentaculata has been reported from the Gulf, the
east coast of North and South America, and the coast of
southern California.

187

Table 60. — Slqambra tentaculata — Locality records and
number of individuals from survey stations,
Tampa Bay, Florida, 1963-69 (D-dredge, S-
shovel, N-net)

Old Tampa Bay

Hillsborough Bay

Upper Tampa Bay

11-6

2

11-7

1

11-8

8

3

11-9

37

1

11-11

4

11-12

10

11-13

3

11-14

6

1

11-15

6

1

11-16

2

1

11-17

11

Boca Ciega Bay

D-ll 1

D-23 1

14-1-A 1

14-4 3

Lower Tampa Bay
17-2 1 17_9

Stations Individuals Stations Individuals

3-4 6 4-8 1

3-5 3 4-13 2

4-4 1 5-1-A 1

4-7 3

10-16 2 10-19

10-17 6

11-18

1

11-19

7

11-20

4

2

11-22

5

3

11-23

2

1

11-24

2

11-25

2

11-26

1

12-14

4

13-1-B

]

15-6

1

15-8

1

15-14

3

16-6

1

188

Table 61. — Siqambra tentaculata — Mean and range of observed
environmental factors from survey stations,
Tampa Bay, Florida, 1963-69

Number
Factor Mean Range observations

Water temperature (*C.)

Salinity (%„)

PH

Depth (m.)

Sediment type

Granules (wt. %)

Sands (wt. %)

Silts (wt. %)

Clay (wt. %)

CaCO (wt. %)

Organic carbon (wt. %)

Organic nitrogen (wt. %)

Mean grain size,

total sample (0) 4.0 0.9 to 7.3 39

Standard deviation,

total sample (0) 1.9 0.7 to 5.5 39

Skewness, total sample 0.4 -0.7 to 2.1 39

Kurtosis, total sample 4.2 -1.3 to 20.1 39

Mean grain size,

noncarbonate fraction (0) 2.9 1.4 to 4.1 39

Standard deviation,

noncarbonate fraction (0) 1.3 0.5 to 3.2 39

Mean grain size,

carbonate fraction (0) -0.03 -2.3 to 2.4 36

Standard deviation,

carbonate fraction (0) 1.4 0.4 to 2.9 36

27.5

18.2

to

31.0

40

27.2

23.8

to

34.6

40

7.6

7.4

to

8.2

36

2

O-

to

4.0

40

silty
sand

sand
silt

to

clayey

3S

2.2

0.0

to

41.5

39

67.0

0.9

to

98.4

39

17.1

0.9

to

53.1

39

13.5

0.3

to

50.3

39

18.3

0.9

to

66.0

39

0.5

0.1

to

2.3

29

0.04

0.00 to 0.2

29

189

Family SYLLIDAE Grube, 1850

The sylllds comprise a large group of small, thread-
like worms that inhabit all seas from the tropics to the
poles. Some are found in sediments and others nestle
among sessile bottom animals or graze on benthic vegeta-
tion. They probably feed on the cell fluids of plants
and smaller invertebrates.

Sixteen species were collected in Tampa Bay. Exogone
dispar was the only species found in all areas of the
Estuary. Seven others were collected only near the mouth
of the Estuary or at least no further north than Interbay
Peninsula (Branchlosyllls oculatus. Odontosyllis enopla,
Syllis annularis. Syllis sponqlcola. Syllis varleqata.
Plonosyllis sp. , and Syllis sp. A). The others were found
in both brackish and high salinity areas of the Estuary
(Autolytus cornutus. Branla clavata. Syllis aciculata.
Syllis gracilis, Syllis vittata. Brania sp., Sphaerosvllis
sp., and Syllis sp. B) .

Many were collected largely or entirely by net so that
sediment data is meagre or absent for some species.
Key to SYLLIDAE Collected in Tampa Bay

1 Ventral, parapodial cirri absent.... Autolytus cornutus
- Ventral, parapodial cirri present 2

190

2 Palps joined at the base; 2 pairs of tentacular
cirri; dorsal cirri faintly segmented or smooth 3

Palps joined through one-half or more of their

length; 1 or 2 pairs of tentacular cirri; dorsal

cirri smooth 4

- Palps not joined, 2 pairs of tentacular cirri;

dorsal cirri distinctly segmented 7

3 Teeth on ventral rim of pharynx; large occipital

flap on peristomium Odontosyllis enopla

Single anterior tooth on dorsal rim of pharynx;
perlstomial flap absent Pionosyllis sp.

4 One pair of tentacular cirri 5

- Two pairs of tentacular cirri 6

5 Dorsal cirri cyllndlcal Exogone dispar

- Dorsal cirri flask shapped; parapodia have
basal capsules with rod-like

inclusions Sphaerosyllls sp .

6 Compound setae all similar with distinct

spinous margin and entire tip Branla sp.

- Compound setae have a distal appendage of 2
types (1) short and spinous with entire tip
(2) short to long with spinous margin and

bldentate tip Brania clavata

7 No compound setae; simple, acicular setae

have Y-shaped tip Syllis spongicola

- No simple setae; compound, falcate setae of 2
kinds (1) short, ventral ones with a distal
appendage bearing a rounded basal tooth and
large, smooth, strongly curved, terminal tooth'
(2) longer dorsal ones with a distal appendage
bearing a spinous margin and small, curved,

terminal tooth Syllis annularis

Simple and compound setae present 8

191

8 Simple setae have an entire tip; compound setae
have a distal appendage bearing a single, smooth,
strongly curved tooth Branchlosyllls oculatus

Some or all compound setae have a spinous

margin 9

9 Median and posterior segments have simple Y-
shaped, acicular, setae as well as compound
falclgers and setae with various degrees of
fusion between proximal and distal

appendages Syllis gracilis

Simple, acicular, Y-shaped setae absent 10

10 Posterior, compound setae have a short, distal
appendage with no spinous margin and a

bidentate tip Syllis sp. A

- Posterior compound setae all have a spinous

margin 11

11 Compound setae all similar 12

- Compound setae have short or long, distal

appendage 13

12 Distal appendage of compound setae

bidentate Syllis variegata

- Distal appendage of compound setae

entire Syllis vlttata

13 Longer distal appendage of compound setae
about 3 times the length of shorter appendage;

both have a bidentate tip.. Syllis aciculata

- Longer distal appendage of compound setae about
7 times the length of shorter appendage; short
appendage ends in a bidentate tip; long

appendage ends in a capillary tip Syllis sp. B

Autolytus cornutus Agassiz, 1863
(Described and illustrated by Pettibone, 1963a)

Specimens were collected at 13 survey stations and

192

at incidental localities near Piney Point (upper Tampa
Bay) and in Bunces Pass (Boca Ciega Bay). Survey stations
were in Old Tampa Bay, Boca Ciega Bay and lower Tampa Bay
(table 62).

The only sediment data came from collections in Boca
Ciega Bay. They show a bottom type of fine, poorly sorted
sand, with about nine percent silt and clay, less than one
percent organic carbon, and a small percentage of coarse
shell fragments (table 63).

The bottom at both stations was vegetated with algae
and turtle grass.

Neither gravid nor juvenile specimens were collected.

A. cornutus has been found in growths of attached
plants and animals along the Atlantic seaboard from the
Arctic south to Chesapeake Bay. This report is the first
for the species in the Gulf of Mexico.

193

Table 62.— Autolytus cornutus— Locality records and number
of individuals from survey stations, Tampa Bay,
Florida, 1963-69 (D-dredge, S-shovel , N-net)

6-2

14-16

Old Tampa Bay

Stations Individuals Stations

6-3

Boca Ciega Bay

BC-M 5 PB-1

BC"N 3 PB-4

D"2 2 3 14-3

D-18 1 15_12

D-25 4 15-14

Lower Tampa Bay

Individuals

194

Table 63. — Autolytus cornutus — Mean and range of observed
environmental factors from survey stations,
Tampa Bay, Florida, 1963-69

Factor

Water temperature (°C.)

Salinity (%„)

PH

Depth (m. )

Sediment type

Granules (wt. %)

Sands (wt. %)

Silts (wt. %)

Clay (wt. %)

CaC03(wt. %)

Organic carbon (wt. %)

Organic nitrogen (wt. %)

Mean grain size,

total sample (0) 2.9 2.5 to 3.4

Standard deviation,
total sample (0)

Skewness, total sample

Kurtosis, total sample

Mean grain size,
noncarbonate fraction (0)

Standard deviation,
noncarbonate fraction (0)

Mean grain size,
carbonate fraction (0)

Standard deviation,
carbonate fraction (0)

Number

Mean

Range

observations

26.3

25.5 to 27.0

2

34.0

33.2 to 34.9

2

8.2

—

2

0.3

—

2

sand

—

2

5.3

7.1 to 3.4

2

86.1

81.0 to 91.2

2

6.9

0.3 to 13.4

2

1.7

1.4 to 2.1

2

12.6

7.3 to 18.0

2

0.7

—

1

0.03

1

1.8

1.8 to

1.9

2

0.3

-0.01 to

0.6

2

3.6

2.6 to

4.6

2

2.9

2.7 to

3.1

2

1.7

1.4 to

2.1

2

-0.2

-0.4 to

0.1

2

1.2

1.0 to

1.4

2

195

Branchlosyllls oculata Ehlers, 1887
(Described and illustrated by Rioja, 1959)

One specimen was collected from a sponge in Boca
Ciega Bay, and others were found in lower Tampa Bay at a
single survey station (table 64).

Sediment data came from the dredge station in lower
Tampa Bay. The bottom was composed of poorly sorted,
medium sand with some large pieces of shell. There was
practically no silt, clay, or organic carbon in the sample
(table 65).

Algae, but no sea grasses, were recorded at the dredge
station. "

Neither gravid nor juvenile specimens were collected.

This syllid was originally described from a collection
off Key West, Florida, and has since been reported from
calcareous algae in the western Gulf near Veracruz, Mexico
(Rioja, 1959). It is apparently restricted to the Gulf
and Caribbean.

196

Table 64. — Branch losyl lis oculata — Locality records and
number of individuals from survey stations,
Tampa Bay, Florida, 1963-69 (D-dredge, S-
shovel, N-net)

Boca Ciega Bay

Stations

Individuals Stations

Individuals

D S N

D S N

16-4

24

Lower Tampa Bay

15-28

1

197

Table 65. — Branchlosyllls oculata — Mean and range of ob-
served environmental factors from survey
stations, Tampa Bay, Florida, 1963-69

Factor

Mean

Range

Water temperature («C.) 24.0

Salinity <%.) 31.1

PH 8.1

Depth (m.) 1.1

Sediment type sand

Granules (wt. %) 2.8

Sands (wt. %) 96.6

Silts (wt. %) 0.4

Clay (wt. %) 0.2

CaC03 (wt. %) 35.8

Organic carbon (wt. %) 0.1

Organic nitrogen (wt. %) 0.04

Mean grain size,

total sample (0) 1.4

Standard deviation,

total sample (0) 1.2

Skewness, total sample 0.2

Kurtosis, total sample 5.3

Mean grain size,

noncarbonate fraction (0) 2.7

Standard deviation,

noncarbonate fraction (0) 1.0

Mean grain size,

carbonate fraction (0) -0.8

Standard deviation

carbonate fraction (0) 1.3

Number
observations

1
1
1
1
1
1
1
I
1
1
1
1

I
1
1

1

1

1

1

198

Branla clavata (Claparede, 1863)
(Described and illustrated by Pettibone, 1963a)

A total of nine survey records and one incidental col-
lection (Old Tampa Bay) came from all areas of the Estuary
except Terra Cela Bay (table 66). Both the Hillsborough
and Old Tampa Bay stations were in water that generally
has a salinity greater than 20 parts per thousand, and it
seems likely that more brackish waters act as a barrier to
the distribution of this species.

Sediment data from eight stations indicate that B.
clavata generally occurs on poorly sorted, medium sand
that contains less than six percent silt and clay, but has
a high content of organic carbon and a moderate amount of
coarse shell fragments (table 67).

One-third of the dredge and shovel stations contained
algae and one or more of the five sea grasses that occur in
the Estuary.

No gravid and no young specimens were collected.

This worm is known from high and low latitudes in the
eastern and western Atlantic, the Caribbean, and the Pacific
coast of Mexico. As far as I know, this is the first re-
port of B. clavata for the Gulf of Mexico.

199

Table 66. — Brania clavata — Locality records and number of
individuals from survey stations, Tampa Bay,
Florida, 1963-69 (D-dredge, S-shovel, N-net)

Old Tampa Bay

Stations

Indiv:

Lduals Stations

Individuals

D

S

N

D S N

6-1-C

21

6-3

321

Hillsborough Bay

10-18

2

Upper Tampa Bay

10-4

2

Boca Ciega Bay

15-12

1

4 16-4

1

Lower Tampa Bay

15-28
16-13

1

20

17-6

1

200

Table 67. — Brania clavata — Mean and range of observed
environmental factors from survey stations,
Tampa Bay, Florida, 1963-69

Factor

Mean

Range

Number
observations

Water temperature (*C.)
Salinity (%„ )

PH

Depth (m.)

Sediment type

Granules (wt. %)

Sands (wt. %)

Silts (wt. %)

Clay (wt. %)

CaC03 (wt. %)

Organic carbon (wt. %)

Organic nitrogen (wt. %)

Mean grain size,
total sample (0)

Standard deviation,
total sample (0)

Skewness, total sample

Kurtosis, total sample

Mean grain size,
noncarbonate fraction (0)

Standard deviation,
noncarbonate fraction (0)

Mean grain size,
carbonate fraction (0)

Standard deviation,
carbonate fraction (0)

27.1

22.1 to 31.6

9

28.5

22.1 to 33.9

9

8.0

7.8 to 8.4

9

1.1

i_\ to 3.0

9

sand

shelly sand to
silty sand

8

9.4

0.3 to 44.5

8

85.0

72.5 to 96.6

8

4.3

0.4 to 22.1

8

1.3

0.0 to 5.2

8

26.5

1.5 to 56.9

6

1.1

0.1 to 3.3

6

0.1

OfOl to 0.2

6

1.9

-1.0 to 4.1

1.5

1.2

to

2.8

0.2

-0.5

to

1.6

3.7

-1.5

to

13.7

3.3

2.5

to

5.5

1.3

0.6

to

2.1

0.3

-1.3

to

0.6

1.2

0.9

to

1.6

201

Exogone dlspar (Webster, 1879)
(Described and illustrated by Pettibone, 1963a)

Individuals were collected in all areas of the Estuary
at a total of 87 survey stations (table 68).

Sediment data show that it was generally found on
poorly sorted, fine sand, but also inhabited coarser and
much finer sediments. At most dredge and shovel stations,
silt and clay was less than five percent, organic carbon
approached one percent, and large shell fragments were un-
common (table 69).

Twenty-nine, or about 38 percent of the bottom samples
contained vegetation. Algae were present and sea grasses
included all those found in the Estuary with the exception
of widgeon grass.

Specimens with mature gametes were found in May, July,
August, September, October, and November.

This worm has been recorded in the Gulf of Mexico and
at many localities in the Atlantic and Pacific from boreal
waters to the tropics.

202

Table 68. — Exogone dispar — Locality records and number
of individuals from survey stations, Tampa
Bay, Florida, 1963-69 (D-dredge, S-shovel,
N-net)

Old Tampa Bay

Stations

Individuals

Stations

Individuals

B-l
B-2
6-1-A

4

24

6-3

6-4-A

6-5

10-3

3

10-4

480

6

11-4

1

2

11-5

1

12-2

6

2

12-7

1

12-9

4

12-10

59

12-11

356

12-12

213

12-13

12-14

7

12-15

3

13-3

33

13-5

10

13-6

1

13-8

2 74

21
1

6-2

325

13

Hillsborough Bay

7-3

1

Upper Tampa Bay

Boca Ciega Bay

BC-A

16

BC-M

12

BC-N

193

1

D-3

5

3

D-15

1

D-17

1

D-18

44

D-19-A

1

D-22

2

1

D-25

8

11

PB-1

7

PB-4

382

PB-5

4

3

14-3

1

15-3

1

15-13

2

15-14

3

6

15-15

1

16-1

2

16-4

1

16-6

204

203

Table 68. — Exoqone dispar — Locality records and number
of individuals from survey stations, Tampa
Bay, Florida, 1963-69 (D-dredge, S-shovel,
N-net)-( continued)

Terra Ceia Bay

Stations

Individuals

Stations

Individuals

E-5

E-8

Lower Tampa Bay

195

14-5

5

14-6

1

14-10

4

14-11

4

14-12

12

14-15

10

15-18

2

15-22

60

15-23

126

15-24

39

15-25

22

15-26

42

15-28

1

15-29

7

15-30

15

15-32

3

16-10

16-11

i

16-12

16-13

350

16-14

16-15

16-16

16-17

16-19

16-20

16-21

16-22

16-24

16-27

17-2

17-3

17-4

17-5

17-6

17-7

i7-8

17-9

18-3

21

170

34

20

9

2

3

1

31

17

206

1

3 2

25

187

23

8

204

Table 69. — Exogone dispar — Mean and range of observed
environmental factors from survey stations,
Tampa Bay, Florida, 1963-69

Number
Factor Mean Range observations

Water temperature (*C.)

Salinity (%.)

PK

Depth (m.)

Sediment type

Granules (wt. %)

Sands (wt. %)

Silts (wt. %)

Clay (wt. %)

CaC03 (wt. %)

Organic carbon (wt. %)

Organic nitrogen (wt. %)

Mean grain size,

total sample (0) 2.1 1.1 to 7.1 72

Standard deviation,

total sample (0) 1.4 0.7 to 3.0 72

Skewness, total sample 0.22 -1.1 to 1.9 72

Kurtosis, total sample 6.41 0.8 to 25.7 72

Mean grain size,

noncarbonate fraction (0) 3.0 1.2 to 9.0 69

Standard deviation,

noncarbonate fraction (0) 1.4 0.6 to 3.4 69

Mean grain size,

carbonate fraction (0) 0.1 -2.5 to 3.0 59

Standard deviation,

carbonate fraction (0) 1.2 0.2 to 2.4 59

23.0

14.0 to 32.0

76

29.5

17.6 to 35.1

75

8.0

7.3 to 8.4

75

1.3

l_\ to 3.9

76

sand

shelly sand to
sandy clay

7?

4.0

0.0 to 28.8

72

92.0

24.5 to 99.2

12

2.4

0.0 to 13.4

72

1.5

0.0 to 65.9

72

24.1

0.7 to 85.2

72

0.8

0.1 to 8.4

60

0.04

0.00 to 0.7

60

205

Odontosyllls enopla Verrill, 1900

(Described and illustrated by

Galloway and Welch, 1911)

0. enopla was collected only in an incidental col-
lection in Dunces Pass, Boca Ciega Bay. Salinity in the
pass is always above 30 parts per thousand. No sediment
data are available for the collection locality.

Hartman (1951) reported this worm in the Gulf of
Mexico, and other records indicate that the range of O.
enopla extends from Bermuda to the Caribbean.

206

Syllis aclculata (Treadwell, 1945)
(Described and illustrated by Hartman, 1968)

Collections were made at 21 survey stations and one
incidental locality in Bunces Pass, Boca Clega Bay. The
survey stations included all areas of the Estuary except
Old Tampa Bay (table 70).

The worm was found in sediments of poorly sorted,
medium sand that had little silt and clay, but more than
one percent organic carbon. The sand contained a moderate
amount of coarse shell and some larger bits of shell de-
bris (table 71).

The bottom was vegetated at nearly three-fourths of
the dredge and shovel stations. Algae were recorded, as
were shoal, manatee, and turtle grass.

No individuals with ripe gametes and no juveniles
were found.

S. aclculata is otherwise known only from central
and southern California.

207

Table 70. — Syllis aciculata — Locality records and number

of individuals from survey stations, Tampa Bay,
Florida, 1963-69 (D-dredge, S-shovel, N-net)

Hillsborough Bay

Stations

Individuals Stations

Individuals

D S N

D S N

8-6

6

Upper Tampa Bay

12-9

1

Boca Ciega Bay

BC-M-1

D-23

1

16-1

2

16-3

2 3

16-5 11

16-6 4
16-7 1

Terra Ceia Bay

E-6 2 E-8

Lower Tampa Bay

16-28 1

17-3 1
17-6

17-8 1

16-25 6 17-15 10

14-10

11

14-13

17

15-23

2

15-31

33

208

Table 71. — Syllls aclculata — Mean and range of observed
environmental factors from survey stations,
Tampa Bay, Florida, 1963-69

Number
Factor Mean Range observations

Water temperature (*C.)

Salinity (%. )

pH

Depth (m.)

Sediment type

Granules (wt. %)

Sands (wt. %)

Silts (wt. %)

Clay (wt. *)

CaC03 (wt. %)

Organic carbon (wt. %)

Organic nitrogen (wt. %)

Mean grain size,

total sample (0) 1.9 -1.9 to 3.0 18

Standard deviation,
total sample (0)

Skewness, total sample

Kurtosis, total sample

Mean grain size,
noncarbonate fraction (0)

Standard deviation,
noncarbonate fraction (0)

Mean grain size,

carbonate fraction (0) 0.5 1.0 to 2.4 17

Standard deviation,

carbonate fraction (0) 1.1 0.7 to 1.5 17

22.0

13.0 to 29.5

18

30.9

18.6 to 34.2

18

8.1

7i>6 to 8.3

18

1.0

£1 to 3.0

18

sand

shelly sand to
sand

18

7.8

0.3 to 72.9

16

89.2

27.1 to 98.3

18

2.4

0.0 to 7.2

1C

0.6

0.0 to 1.9

18

23.8

2.7 to 85.2

18

1.1

0.1 to 6.9

17

0.04

0.00 to 0.2

17

1.4

0.9

to

2.0

13

0.4

-0.6

to

1.0

18

7.1

-0.4

to

21.2

18

3.0

1.9

to

4.9

18

1.4

0.6

to

3.4

18

209

Syllls annularis Verrill, 1900

Specimens were collected at 10 survey stations in
Boca Ciega and lower Tampa Bay, and at one incidental
station near Mullet Key in lower Tampa Bay (table 72).

The five stations for which there are sediment data
indicate that S. annularis occurred only in poorly sorted,
fine sand where there is little silt and clay, and more
than one percent organic carbon. Shell fragments comprise
over 30 percent of sand and granule fractions (table 73).
Three of five dredge and shovel samples contained algae,
and shoal grass or turtle grass.

One juvenile worm was collected in October, but no
gravid individuals were seen.

Aside from the original locality in Bermuda, I know
of no other records for S. annularis.

210

Table 72. — Syllis annularis — Locality records and number

of individuals from survey stations, Tampa Bay,
Florida, 1963-69 (D-dredge, S-shovel, N-net)

Boca Ciega Bay

Station:

Individuals

Stations

Individuals

BC-M

BC-N

D-25

15-11

15-16

6 2
1
1
1
6

16-1
16-2
16-4
16-8

1

3 0
2
2

Lower Tampa Bay

14-9

211

Table 73. — Syllls annularis — Mean and range of observed
environmental factors from survey stations,
Tampa Bay, Florida, 1963-69

Factor

Water temperature (*C.)

Salinity (%„)

pH

Depth (m.)

Sediment type

Granules (wt. %)

Sands (wt. %)

Silts (wt. %)

Clay (wt. %)

CaC03 (wt. %)

Organic carbon (wt. %)

Organic nitrogen (wt. %)

Mean grain size,

total sample (0) 2.2 1.4 to 3.1

Standard deviation,
total sample (0)

Skewness, total sample

Kurtosis, total sample

Mean grain size,
noncarbonate fraction (0)

Standard deviation,
noncarbonate fraction (0)

Mean grain size,

carbonate fraction (0) 0.8 -1.7 to 2.3

Standard deviation,

carbonate fraction (0) 0.8 0.2 to 1.4

Number

Mean

Ranc

ie

observations

20.5

17.5

to

26.0

5

32.6

33.0

to

35.1

5

8.1

7.8

to

8.4

5

1.2

D-

to

2.1

5

sand

—

5

7.4

0.1

to

14.7

5

88.7

83.5

to

95.2

5

3.1

1.0

to

8.0

5

0.8

0.0

to

1.9

5

24.0

4.5

to

38.2

5

1.3

0.2

to

4.8

4

0.1

0.02 tc

0.2

4

1.5

1.1

to

1.9

5

0.0

-1.1

tc

1.6

5

5.4

1.0

to

13.3

4

4.3

2.7

to

8.7

4

1.3

0.7

to

2.2

4

212

Syllis gracilis Grube, 1840
(Described and illustrated by Pettibone, 1963a)

Specimens were collected at one survey and one inci-
dental locality in Old Tampa Bay and upper Tampa Bay, one
station in Terra Ceia Bay, and at three stations in lower
Tampa Bay (table 74).

Sediment data are available for two dredge stations
in lower Tampa Bay. There, sediments were extremely
poorly sorted, medium sand that was composed of more than
40 percent shell (table 75).

No vegetation was noted at the dredge stations.

Neither juvenile nor gravid specimens were observed.

S. gracilis has a world-wide distribution in temper-
ate and tropical seas, where it is generally associated
with sessile, bottom growth and coarse sediment particles.
It has been previously reported from the Gulf of Mexico.

213

Table 74. — Syllls gracilis — Locality records and number

of individuals from survey stations, Tampa Bay,
Florida, 1963-69 (D-dredge, S-shovel, N-net)

Old Tampa Bay

Stations

Ind

iv

iduals Stations

Individuals

D

S

N

D S N

4-19

1

Upper Tampa Bay

12-13

1

Terra Ceia Bay

E— 1

1

Lower Tampa Bay

16-14
17-2

3

3 17-6

1 2

214

Table 75. — Syllls gracilis — Mean and range of observed
environmental factors from survey stations,
Tampa Bay, Florida, 1963-69

Factor

Mean

Number
Range observations

Water temperature CO
Salinity (%„)

PH

Depth (m.)

Sediment type

Granules (wt. %)

Sands (wt. %)

Silts (wt. %)

Clay (wt. %)

CaC03 (wt. %)

Organic carbon (wt. %)

Organic nitrogen (wt. %)

Mean grain size,
total sample (0)

Standard deviation,
total sample (0)

Skewness, total sample

Kurtosis, total sample

Mean grain size,
noncarbonate fraction (0)

Standard deviation,
noncarbonate fraction (0)

Mean grain size,
carbonate fraction (0)

Standard deviation,
carbonate fraction (0)

22.1 to 29.1

33.1 to 34.5

7.8 to 8.2

2.0 to 4.0

1.7 to 6.1

91.2 to 94.9

2.1 to 2.7

39.8 to 41.7

0.3 to 0.5

1.8 1.7 to 1.9

5.1 1.7 to 8.5

0.3 0.1 to 0.5

3.9 3.2 to 4.8

3.0 2.5 to 3.5

2.0 0.8 to 3.2
-0.1
0.9

25.6

33.8
8.0
3.0

sand
3.9

93.0
2.4
0.7

40.7
0.4
0.03

215

Syllls sponglcola Grube, 1855
(Described and illustrated by Day, 1967)

This species was collected only by net at a total
of five stations in all areas of the Estuary except Old
Tampa Bay and Hillsborough Bay (table 76). Over 2,000
specimens were found in shell fragments taken by net at
station 18-3.

No young, and no gravid specimens were collected.

S. sponglcola has a world-wide distribution in tem-
perate and tropical waters, and is known from the Gulf of
Mexico.

216

Table 76. — Syllis sponqlcola — Locality records and number
of individuals from survey stations, Tampa Bay,
Florida, 1963-69 (D-dredge, S-shovel, N-net)

Upper Tampa Bay

Stations

Individuals Stations

Individuals

D S N

D S N

12-13

2 13-8

4

Boca Ciega Bay

BC-N

1

Terra Ceia Bay

E-l

1

Lower Tampa Bay

18-3

2000 +

217

Syllls varlegata Grube, 1860
(Described and illustrated by Fauvel, 1923)

Collections were limited to upper Tampa Bay, Boca
Ciega Bay, and lower Tampa Bay at a total of 14 stations.
No specimens were taken north of transect-11, and pre-
sumably the 20 to 25 parts per thousand isohaline is
limiting to this species (table 77).

Sediments at dredge and shovel localities were all
poorly sorted, medium sand, with little silt and clay,
less than one percent organic carbon, and some large shell
fragments (table 78).

Algae were present at three of these stations, and
manatee grass was found at two.

No gravid, and no juvenile worms were noted.

S. variegata is a cosmopolitan species that is asso-
ciated with coarse sediments and attached organisms in
temperate and tropical seas. It has not been previously
reported in the Gulf of Mexico.

218

Table 77. — Syllls varieqata — Locality records and number

of individuals from survey stations, Tampa Bay,
Florida, 1963-69 (D-dredge, S-shovel, N-net)

Upper Tampa Bay

Stations

Individuals Stations

Individuals

D S N

D S N

11-28
12-15

1 13-10
1

1

Boca Ciega Bay

BC-M

3

BC-N

38

2

D-26

4

PB-4

1

15-2 1

15-15 1

16-7 2

Lower Tampa Bay

15-29 5 16-17 34 2

16-15 4 17-2 2

219

Table 78. — Syllis varieqata — Mean and range of observed
environmental factors from survey stations,
Tampa Bay, Florida, 1963-69

Number
Factor Mean Range observations

Water temperature CO 22.6 14.0 to 27.0 8

Salinity (%.) 30.9 24.9 to 34.0 8

pH 8.1 7.8 to 8.3 8

Depth (m.) 1.0 £1 to 2.1 8

Sediment type sand — 6

Granules (wt. %) 3.4 0.3 to 14.7 6

Sands (wt. %) 93.4 83.5 to 98.5 6

Silts (wt. %) 2.6 0.3 to 10.5 6

Clay (wt. %) 0.6 0.2 to 2.2 6

CaCC, (wt. %) 19.4 2.7 to 43.7 6

Organic carbon (wt. %) 0.5 0.1 to 1.2 6

Organic nitrogen (wt. %) 0.01 0.00 to 0.04 6

Mean grain size,

total sample (0) 2.0 1.4 to 2.6 6

Standard deviation,
total sample (0)

Skewness, total sample

Kurtosis, total sample

Mean grain size,
noncarbonate fraction (0)

Standard deviation
noncarbonate fraction (0)

Mean grain size,
carbonate fraction (0)

Standard deviation,
carbonate fraction (0)

1.3

0.8

to

1.9

6

0.3

-0.3

to

1.1

6

7.9

0.9

to

17.9

6

3.0

2.5

to

3.6

6

1.6

0.7

to

2.7

6

-0.1

-1.9

to

1.5

6

1.0

0.2

to

1.8

6

220

Syllis vittata Grube, 1840
(Described and illustrated by Day, 1967)

All specimens were collected by shovel at six sta-
tions. Hillsborough Bay and lower Tampa Bay were the
only areas where none were taken (table 79).

Water depth at all localities was less than 1 m.,
and the average bottom type was poorly sorted, fine sand
with one percent organic carbon, and a small amount of
silt, clay, and shell (table 80).

Three of the six stations were vegetated with algae,
and turtle grass, manatee grass, or shoal grass.

Neither gravid nor juvenile worms were found.

This syllid is commonly found along the western
coast of Europe and Africa. It has not been previously
recorded for the Gulf of Mexico.

221

Table 79. — Syllis vittata — Locality records and number of
individuals from survey stations, Tampa Bay,
Florida, 1963-69 (D-dredge, S-shovel , N-net)

Old Tampa Bay

Stations

Indivi

duals Stations

Individuals

D

S

N

D S N

6-1-D

35

Upper Tampa Bay

11-28

27

Boca Ciega Bay

D-19-A
D-26

2
6

16-8

3

Terra Ceia Bay

S-6

5

222

Table 80. — Syllis vittata — Mean and range of observed
environmental factors from survey stations,
Tampa Bay, Florida, 1963-69

Factor

Mean

Number
" Range observations

Water temperature CO) 24.6 13.0 to 27.0

Salinity (%.) 28.9 24.1 to 32.5

pH 8.1 7.9 to 8.3

Depth (m.) 0.3

Sediment type sand —

Granules (wt. %) 2.2 0.0 to 7.0

Sands (wt. %) 92.2 85.4 to 98.8

Silts (wt. %) 4.4 0.3 to 10.5

Clay (wt. %) 1.1 0.5 to 2.2

CaC03 (wt. %) 7.3 0.9 to 16.2

Organic carbon (wt. %) 1.0 0.2 to 2.6

Organic nitrogen (wt. %) 0.03 0.01 to 0.07

Mean grain size,

total sample (0) 2.4 1.9 to 2.8

Standard deviation,

total sample (0) 1.4 0.8 to 2.0

Skewness, total sample 0.9 -0.2 to 2.2

Kurtosis, total sample 13.2 3.1 to 30.1

Mean grain size,

noncarbonate fraction (0) 2.8 2.1 to 3.5

Standard deviation,

noncarbonate fraction (0) 1.1 0.7 to 1.6

Mean grain size,

carbonate fraction (0) 0.2 -0.9 to 1.1

Standard deviation,

carbonate fraction (0) 1.1 0.9 to 1.3

223

Branla sp.

In this species, the simple, acicular setae have a
blunt tooth at the tip (figure 5, A). Compound setae all
have the same shape — the proximal shaft bears a short,
terminal appendage with an entire tip, and has a distinct-
ly serrate margin (figure 5,B).

One specimen was collected at the mouth of Hills-
borough Bay, and other collections came from upper Tampa
Bay and lower Tampa Bay (table 81).

All collections were taken by dredge or shovel, and
average sediment type was poorly sorted, medium sand that
was about one-fourth shell and contained very little silt
and clay. Less than one percent organic carbon was pres-
ent (table 82).

A bottom growth of algae and turtle grass was record-
ed at three stations.

Neither juveniles nor specimens with mature gametes
were collected.

224

Table 81. — Brania sp. — Locality records and number of

individuals from survey stations, Tampa Bay,
Florida, 1963-69 (D-dredge, S-shovel, N-net)

10-19

Hillsborough Bay

Upper Tampa Bay

Stations Individuals Stations Individuals

D S N D S N

10-1-A 6 10-4

10-3 24 11-1

Lower Tampa Bay

17-6 1 18-4

17-7 1

225

Table 82. — Brania sp. — Mean and range of observed environ-
mental factors from survey stations, Tampa Bav.
Florida, 1963-69

Number

Ranqe

ob

servations

19.6 to 31.5

8

22.7 to 34.2

8

7.7 to 8.2

7

/l to 2.3

8

shelly sand

8

factor Mean

Water temperature ("C.) 27.4

Salinity (%„) 27.0

PH 7.9

Depth (m.) 2.6

Sediment type sand

to sand

Granules (wt. %) 5.3 0.1 to 21.5 8

Sands (wt. %) 92.7 78.5 to 99.9 8

Silts (wt. %) 1,4 o.O to 3.8 8

Clay (wt. %) 0.5 0.0 to 1.5 8

CaC03 (wt. %) 24.4 0.9 to 49.9 8

Organic carbon (wt. %) 0.6 0.1 to 1.2 4

Organic nitrogen (wt. %) 0.03 0.01 to 0.2 4

Mean grain size,

total sample (0) 1.9 0.8 to 2.4 8

Standard deviation,

total sample (0) 1.4 0.5 to 2.3 8

Skewness, total sample -0.7 -1.4 to 0.5 8

Kurtosis, total sample 7.4 -0.2 to 26.4 8

Mean grain size,

noncarbonate fraction (0) 2.9 2.5 to 3.8 8

Standard deviation,

noncarbonate fraction (0) 1.4 0.8 to 2.3 8

Mean grain size,

carbonate fraction (0) -0.6 -1.8 to 0.6 6

Standard deviation,

carbonate fraction (0) 1.4 0.9 to 1.7 6

226

Plonosyllls sp.

This unidentified worm has simple setae with an
entire tip (figure 5,C) and three types of compound
setae (figure 5,D,E,F). The shortest ones have a stout
proximal shaft, and a very short falcate appendage that
bears three teeth. Setae of intermediate length have a
spinous margin at the end of the proximal appendage
followed by a falcate appendage with spinous margin and
bidentate tip. The third type has a long, capillary,
terminal appendage with faint striations along one mar-
gin.

Specimens were collected by dredge on two occasions
in Boca Clega Bay at station BC-N (table 83) .

Sediment there was poorly sorted, medium sand with
very little silt, clay, and organic carbon. Shell frag-
ments in the sand and granule size range comprised about
one-third of the sediment (table 84).

No bottom vegetation was recorded.

Both specimens appeared mature, but neither contained
mature gametes.

227

Table 83. — Pionosyllis sp. — Locality records and number

of individuals from survey stations, Tampa Bay,
Florida, 1963-69 (D-dredge, S-shovel, N-net)

Boca Ciega Bay

Stations

Individuals Stations

Individuals

D S N

D S N

BC-N

2

228

Table 84. — Pionosyllis sp. — Mean and range of observed
environmental factors from survey stations,
Tampa Bay, Florida, 1963-69

Number
Range observations

Factor Mean

Water temperature CO 16.3 15.0 to 17.5

Salinity (%„) 31.7 31.3 to 32.2 2

PH 8.1 7.9 to 8.3 2

Depth (m.) 2.3 2

Sediment type sand 2

Granules (wt. %) 9.5 4.2 to 14.7 2

Sands (wt. %) 89.7 83.5 to 95.9 2

Silts (wt. %) 1.0 0.6 to 1.5 2

Clay (wt. %) 0.1 0.0 to 0.3 2

CaC03 (wt. %) 32.0 25.9 to 38.2 2

Organic carbon (wt. %) 0.2 1

Organic nitrogen (wt. %) 0.03 1

Mean grain size,

total sample (0) 1.5 1.4 to 1.5 2

Standard deviation

total sample (0) 1.3 0.8 to 1.9 2

Skewness, total sample -1.0 -1.7 to -0.3 2

Kurtosis, total sample 0.6 0.3 to 0.9 2

Mean grain size,

noncarbonate fraction (0) 2.7 1

Standard deviation

noncarbonate fraction (0) 0.7 1

Mean grain size,

carbonate fraction (0) 1,5 !

Standard deviation,

carbonate fraction (0) 0.2 1

229

Sphaerosyllls sp.

This species has features that are intermediate be-
tween Sphaerosyllis hystrix and S. calif orniensis (Hart-
man, 1968). Parapodial capsules are present as in S.
hystrix, but the setae more closely resemble those of S.
calif orniensis (figure 5,G,H,I,J).

Collections were made only in Old Tampa Bay and
lower Tampa Bay at a total of eight localities (table 85).

Average sediment was poorly sorted, medium sand with
less than one percent organic carbon and a small proportion
of silt and clay. Shell, in the sand and granule size
range made up a large percentage of the sediment (table
86).

No bottom vegetation was found.

No specimens were in reproductive conditions and no
young were seen.

2 30

Table 85.— sphaerosyllis sp.— Locality records and number
of individuals from survey stations, Tampa Bay,
Florida, 1963-69 (D-dredge, 5-shovel, N-net)

6-3

16-

-12

16-

■13

16-

-15

17-

-2

Old Tampa Bay

Lower Tampa Bay

12
3
1

1

Stations Individuals Stations Individuals

17-3

3

17-4

5

17-6

3

231

Table 86. — Sphaerosyllls sp. — Mean and range of observed
environmental factors from survey stations,
Tampa Bay, Florida, 1963-69

Factor

Water temperature t'C.)

Salinity (%.)

PH

Depth (m.)

Sediment type

Granules (wt. %)

Sands (wt. %)

Silts Cwt. %)

Clay Cwt. %)

CaC03 (wt. %)

Organic carbon (wt. %)

Organic nitrogen (wt. %)

Mean grain size,

total sample (0) 1.4 0.5 to 1.9 6

Standard deviation,

total sample (0) 1.4 x.l to 1.7 6

Skewness, total sample 0.5 0.2 to 0.8 6

Kurtosis, total sample 5.1 3.2 to 8.2 6

Mean grain size,

noncarbonate fraction (0) 3.5 2.5 to 5.5 6

Standard deviation,

noncarbonate fraction (0) 1.7 0.6 to 3.2 6

Mean grain size,

carbonate fraction (0) 0.5 -0.1 to 1.7 5

Standard deviation,

carbonate fraction (0) 0.9 0.8 to 0.9 5

Number

Mean

i

^anqe

observations

25.0

24.0

to

31.6

7

32.4

24.2

to

34.5

7

8.0

7.8

to

8.2

7

2.3

1.9

to

4.0

7

sand

—

7

3.8

1.7

to

5.6

6

94.1

91.2

to

96.3

6

1.6

0.7

to

2.7

6

0.5

0.1

to

0.7

6

55.7

39.8

to

85.2

6

0.8

0.2

to

3.3

6

0.1

0.0

to

0.2

6

232

Syllls sp. A

In posterior segments this species has simple,
acicular setae with a blunt tip. There are three types
of compound hooks — each in a different body region.
Anteriorly, the distal appendage of hooked setae has a
smooth margin and a minutely bidentate tip. In median
hooks, the terminal joint has a more distinct bidentate
tip and a spinous margin. Posterior segments have hooks
with a stout, proximal shaft and a short, distal append-
age that has a smooth margin and two large, terminal
teeth (figure 5,K,L,M,N, ).

Collections came from 33 localities between upper
Tampa Bay and lower Tampa Bay. None were found in either
Old Tampa or Hillsborough Bays (table, 87).

Average sediment was poorly sorted, medium sand with
little silt, clay, or organic carbon. Shell particles
comprised a large percentage of the sand size class
(table 88).

About one-half of the bottom samples contained algae.
Shoal grass, Halophila, manatee grass, and turtle grass
were present in some.

Neither gravid nor young worms were found.

233

Table 87. — Syllls sp. A — Locality records and number of
individuals from survey stations, Tampa Bay,
Florida, 1963-69 (D-dredge, S-shovel, N-net)

Upper Tampa Bay

Stations

Ind

ivi

duals Stations

Individuals

D

S

N

D

S N

12-11

13-3

13-4

1

2
1

13-8
13-9
13-10

8
1
3

Boca Ciega Bay

BC-N
16-4

1

30

16-5
16-8

4
13

Terra Ceia Bay

E-8

10

Lower Tampa Bay

14-11

4

14-12

34

14-14

2

14-15

1

15-22

3 0

15-23

76

15-24

14

15-25

32

15-26

6

15-27

1

16-12

48

16-13

220

16-14

1

16-16

3 0

16-24

66

17-2

205

17-3

15

17-4

15

17-5

4

17-6

1

17-7

6

18-3

25

234

Table 88. — Syllis sp. A — Mean and range of observed environ-
mental factors from survey stations, Tampa Bay,
Florida, 1963-69

Factor

Water temperature (*C.)

Salinity (%„)

PH

Depth (m.)

Sediment type

Granules (wt. %)

Sands (wt. %)

Silts (wt. %)

Clay (wt. %)

CaC03 (wt. %)

Organic carbon (wt. %)

Organic nitrogen (wt. %)

Mean grain size,

total sample (0) 1.8 0.4 to 3.0 30

Standard deviation

total sample (0) 1.4 0.8 to 2.3 30

Skewness, total sample 0.1 -0.5 to 0.8 30

Kurtosis, total sample 4.1 -0.03 to 11.9 30

Mean grain size,

noncarbonate fraction (0) 2.8 1.7 to 5.9 30

Standard deviation,

noncarbonate fraction (0) 1.3 0.6 to 3.2 30

Mean grain size,

carbonate fraction (0) 0.4 -1.3 to 1.7 22

Standard deviation,

carbonate fraction (0) 1.1 0.2 to 2.1 22

Number

Mean

Ranqe

observations

21.5

15.0

to

25.0

31

31.7

27.5

to

34.5

30

8.0

7.8

to

8.7

31

2.0

D-

to

4.0

31

sand

shelly sand

30

to sand

5.2

0.3

to

21.4

30

92.9

77.4

to

99.2

30

1.5

0.2

to

7.2

30

0.4

0.1

to

1.9

3 0

36.6

6.5

to

85.2

30

0.8

0.1

to

5.0

3 0

0.03

0.00 tc

0.2

30

235

Syllls sp. B
This worm has three types of setae, all of which
are represented in median and posterior segments. Simple,
acicular setae have a notch near the bifid tip which is
formed by two, low teeth (figure 5,0). The compound hooks
are all similar and consist of a basal shaft, and terminal
appendage that has an entire tip and strongly serrate mar-
gin (figure 5,P). The third type consist of very long,
compound capillary setae. The distal appendage has fine
serrations along the margin (figure 5,Q).

Specimens were collected at 48 localities in all areas
of the Estuary except Hillsborough and Terra Cela Bays
(table 89).

Average bottom type in these areas was poorly sorted,
fine sand with about two percent silt and clay, and one
percent organic carbon. Sediment composition was about
one-fifth shell in the sand and granule size range (table
90).

One-half of the bottom samples contained algae and
some also had shoal grass, manatee grass, and turtle
grass.

No young, and no sexually mature individuals were
collected.

236

Table 89. — Syllis sp. B — Locality records and numbers of
individuals from survey stations, Tampa Bay,
Florida, 1963-69 (D-dredge, S-Shovel, N-net)

Old Tampa Bay

10-3

28

10-4

2

10-7

1

12-1

51

12-8

14

Boca Ciega Bay

BC-N

10

D-2

12

D-3

D-6

2

D-23

7

D-25

5

Lower Tampa Bay

14-8

4

14-15

24

15-21

2 'j

15-27

44

15-28

13

15-30

70

15-32

4

15-33

32

16-9

2

16-9-A

4

16-9-B

17

16-13

75

Stations Individuals Stations Individuals

D

S N

D

S

N

6-2

2

6-3

6

2

Upper Tampa Bay

12-14 1
13-1-A 255

13-1-B 10

13-3 27
13-10 22

PB-4 3

15-3 1

15-15 1
16-1 4

16-2 8

16-6 2

16-15

14

16-16

42

16-17

14

16-21

1

16-24

16

16-25

12

16-28

8

17-5

3

17-6

2

17-8

4

17-9

2

18-3

3

237

Table 90. — Syllis sp. B — Mean and range of observed

environmental factors from survey stations,
Tampa Bay, Florida, 1963-69

Factor

Mean

Ranqe

Number
observations

Water temperature

CC,

,)

24.2

15.5 to 32.0

51

Salinity (%„)

30.6

21.8 to 35.1

50

PH

8.0

7.7 to 8.4

50

Depth (m.)

1.0

/l to 3.0

51

Sediment type

sand

shelly sand
to sand

49

Granules (wt. %)

3.5

0.0 to 21.5

49

Sands (wt. %)

92.0

77.4 to 99.2

4 9

Silts (wt. %)

1.9

0.0 to 11.8

49

Clay (wt. %)

0.6

0.0 to 2.8

49

CaC03 (wt. %)

18.5

1.6 to 75.1

49

Organic carbon (wt

. %)

1.0

0.01 to 6.9

40

Organic nitrogen (

wt.

%)

0.1

0.00 to 1.2

40

Mean grain size,

total sample (0) 2.1 0.4 to 3.4 49

Standard deviation,

total sample (0) 1.3 0.6 to 2.3 49

Skewness, total sample 0.1 -1.4 to 1.9 49

Kurtosis, total sample 8.1 -0.2 to 29.7 48

Mean grain size,

noncarbonate fraction (0) 3.1 1.4 to 8.7 46

Standard deviation,

noncarbonate fraction (0) 1.2 0.6 to 2.8 46

Mean grain size,

carbonate fraction (0) 0.5 -1.8 to 6.6 38

Standard deviation,

carbonate fraction (0) 1.2 0.3 to 2.3 38

Figure 5. — Diagnostic features of Brania sp. , Pionosyllis
sp., Sphaerosyllis sp., Syllis sp. A, and
Syllis sp. B

Brania sp.

Pionosyllis sp. :

Sphaerosyllis sp.

Syllis sp. As

Syllis sp. B:

(A) Simple, acicular spine (B)
Compound hook

(C) Simple, acicular spine (D)
Short, compound hook (E) Long,
compound hook (F) Compound,
capillary seta

(G) Simple, acicular spine (H)
Simple, acicular hook (I) Short,
spinous compound hook (J) Short,
compound hook

(K) Simple, acicular spine (L)
Anterior, compound hook (M) Median,
compound hook (N) Posterior, com-
pound hook

(0) Simple, acicular spine (P)
Compound hook (Q) Compound,
spiniger.

239

FIGURE 5

C \ D \fo E F

0 OIMM

G M H

0.01 MM

N

0.02MM

0.02 MM 0.02 MM 0.02MM

240
Family NEREIDAE Johnston, 1865

The nereids are a large group of predominantly om-
nivorous worms that are well represented in all seas.
Some crawl actively among sessile organisms and bottom
debris, while others construct burrows, build tubes, or
live commensally and perhaps parasitically. The family
is well represented in Tampa Bay where 10 species were
recorded.

The rarely collected, Rullierinereis mexicana, was
found only in Boca Clega Bay. Ceratonerels irritabllis,
was collected in Boca Ciega and lower Tampa Bays;
Namalycastis abiuma, was taken in Boca Ciega and Old
Tampa Bays; and Nicon lackevi was found in Hillsborough
and upper Tampa Bays. The remaining six species were
found in at least three areas of the Estuary, and prob-
ably live throughout the entire Tampa Bay system (Laeonereis
culver! . Nereis arenaceodentata , Nereis pelagica occidentalls.
Nereis succinea, Perlnereis floridana, and Platynereis
dumerilll) .
Key to NEREIDAE Collected in Tampa Bay

1 Chitinous paragnaths absent on both basal and
maxillary, pharyngeal ring 2

- Chitinous paragnaths present on some area of

pharynx — conical or bar-like 5

2 Pharynx bears fleshy papillae Laeonereis culverl

241

Pharynx smooth 3

Parapodia of median segments bear a large dorsal

and small ventral cirrus, and a single, setal

lobe Namalycastls abluma

Parapodia of median segments bear distinct

notopodial and neuropodial lobes in addition

to dorsal and ventral cirri 4

Dorsal, parapodial cirri consist of a long,

basal cirrophore and short, distal appendage;

ventral, heterogomph falclgers have a smooth

margin Nicon lackeyi

Dorsal, parapodial cirri unsegmentedj

notosetae all homogomph splnigers; dorsal

neurosetae, homogomph spinlgers and

heterogomph falcigers; ventral neurosetae,

heterogomph spinigers and

falcigers Rulllerinereis mexicana

Some or all pharyngeal paragnaths bar-like 6

All paragnaths conical 7

All paragnaths bar-like Platynereis dumerilii

Pharyngeal bars on region VI

only Perinereis floridana

Basal region of pharynx smooth, maxillary

region bears conical

paragnaths Ceratonereis irritabilis

Conical paragnaths on both basal and

maxillary pharyngeal regions „ 8

Pharyngeal areas V through V1IZ have con-
tinuous rows of paragnaths Nereis arenaceodentata

Basal region of pharynx has continuous rows

of paragnaths on regions VII and VIII only 9

Posterior parapodia have greatly enlarged,

dorsal, notopodial lobe Nereis succinea

242

- Posterior parapodia have a triangular, dorsal,
notopodial lobe that extends no further than
the notopodial, acicular
lobe Nereis pelacrlca occldentalls

Ceratonerels lrritabills (Webster, 1879)
(Described and illustrated by Hartman, 1945)

Individuals were collected at only two stations in
Boca Ciega Bay, and three in lower Tampa Bay. Such a
distribution indicates that this species is restricted
to areas of the Estuary where average salinity is at least
30 parts per thousand (table 91).

Sediment at dredge stations was poorly sorted, fine
sand. About one-third of the sand fraction was composed
of shell debris, and although organic carbon was greater
than one percent, the silt-clay content was under four
percent (table 92).

Algae were present at one station, and no vegetation
was recorded from the other.

A gravid specimen was collected in June and swarming
spawners were netted in April.

C. irritabilis is known from North Carolina and
Virginia on the south Atlantic coast, but has not been
previously reported in the Gulf of Mexico.

243

Table 91. — Ceratonerels Irritabllls — Locality records

and number of individuals from survey stations,
Tampa Bay, Florida, 1963-69 (D-dredge, S-
shovel , N-net)

Boca Ciega Bay

Stations Individuals Stations Individuals
D S N D S N

15-5

1

15-11

1

Lower Tampa Bay

15-30
16-13

1
1

16-15

2

244

Table 92. — Ceratonerels irritabills — Mean and range of
observed environmental factors from survey
stations, Tampa Bay, Florida, 1963-69

Number
Factor Mean Range observations

Water temperature (°C.) 24.3 24.0 to 25.0 4

Salinity (%„) 32.4 29.8 to 33.9 4

pH 8.0 7.8 to 8.2 4

Depth (m.) 2.0 1.0 to 3.0 4

Sediment type sand — 4

Granules (wt. %) 2.7 0.6 to 4.4 4

Sands (wt. %) 93.7 69.1 to 96.3 4

Silts (wt. %) 3.0 0.3 to 8.9 4

Clay (wt. %) 0.6 0.1 to 1.5 4

CaC03 (wt. %) 34.4 13.5 to 57.4 4

Organic carbon (wt. %) 1.3 0.5 to 3.3 3

Organic nitrogen (wt. %) 0.1 — 3

Mean grain size,

total sample (0) 2.0 1.3 to 3.4 4

Standard deviation,

total sample (0) 1.4 1.2 to 1.5 4

Skewness, total sample 0.2 -0.4 to 0.7 4

Kurtosis, total sample 4.2 3.2 to 5.3 4

Mean grain size,

noncarbonate fraction (0) 3.4 2.7 to 5.5 4

Standard deviation,

noncarbonate fraction (0) 1.2 0.5 to 2.1 4

Mean grain size,

carbonate fraction (0) 0.2 -0.1 to 0.7 4

Standard deviation,

carbonate fraction (0) 1.4 0.9 to 2.5 4

245

Laeonerels culverl (Webster, 1879)
(Described and illustrated by Hartman, 1945)

This species was found in all areas of the Estuary
at 34 survey stations and 10 incidental localities. The
largest number in a single collection (303) were taken
from a shovel station (A-5) in upper Old Tampa Bay (table
93) . L. culveri can apparently withstand water of oceanic
salinity as well as water that is practically fresh.

Average bottom type at dredge and shovel stations
was poorly sorted, fine sand with about 10 percent silt
and clay, nearly one percent organic carbon, and a small
percentage of shell in both the granule and sand size clas-
ses (table 94) .

One-third of the bottom samples contained algae, as
well as sea grasses that included shoal grass, turtle
grass, and manatee grass.

Gravid specimens were found in July, September, and
November, and juveniles were noted in February, July,
August, and September.

L. culveri has been recorded in the Gulf of Mexico
and is otherwise known in the western Atlantic in shallow
water between Brazil and North Carolina.

246

Table 93. — Laeonereis culveri — Locality records and

number of individuals from survey stations,
Tampa Bay, Florida, 1963-69 (D-dredge, 5-
shovel, N-net)

Old Tampa Bay

Stations Individuals

Stations Individuals

S N

D S N

A-l
A-3
A-5
A-6
B-3
4-1

24

1

303

54

59

2

4-2

4-4

5-1-A

6-1-A

6-1-D

6-8

12

Hillsborough Bay

C-l

C-2

C-4

C-8-2

C-9

10

3

1

1

8-10

9-1

10-15

10-16

10-23

8-9

6

Upper Tampa Bay

D-28
10-13

5

1

10-14-A
11-26

1 123
1

D-ll
PB-1
14-1-A

Boca Ciega Bay

2

58

9

15-2
15-3

45
4

Terra Ceia Bay

E-6

Lower Tampa Bay

16-26

247

Table 94. — Laeonerels culver! — Mean and range of observed
environmental factors from survey stations,
Tampa Bay, Florida, 1963-69

Factor

Mean

Range

Number
observations

Water temperature (*C.)

Salinity (%„)

PH

Depth (m. )

Sediment type

Granules twt. %)

Sands (wt. %)

Silts (wt. %)

Clay <wt. %)

CaC03 (wt. %)

Organic carbon (wt. %)

Organic nitrogen (wt. %)

Mean grain size,
total sample (0)

Standard deviation,
total sample (0)

Skewness, total sample

Kurtosis, total sample

Mean grain size,
noncarbonate fraction (0)

Standard deviation,
noncarbonate fraction (0)

Mean grain size,
carbonate fraction (0)

Standard deviation,
carbonate fraction (0)

28.3

13.0 to 34.1

36

23.7

3.7 to 34.8

36

7.8

7/1 to 8.3

2 9

0.5

/l to 2.0

36

sand

shelly sand to
sandy clay

36

2.7

0.0 to 46.2

36

87.5

24.5 to 99.9

36

4.9

0.0 to 37.5

3 6

4.8

0.0 to 65.9

36

6.7

0.5 to 32.3

36

0.8

0.2 to 2.2

15

0.1

0.01 to 0.2

15

2.9

1.4

0.5

11.1

3.1

1.6

-0.6

1.6

0.8 to 7.1

1.9 to 3.

0.7 to 2.5

36

0.5 to 2.7 36
-1.3 to 2.3 36
-1.3 to 43.4 36

3 4

34

-2.5 to 1.8 33

0.4 to 3.1 33

248

Namalycastls abiunia (Muller, in Grube, 1871)
(Described and illustrated by Hartman, 1959)

This species was not collected at survey stations,
but was taken in the high, intertidal zone from mangrove
peat and debris in Old Tampa Bay (Mobbly Bay) and lower
Boca Ciega Bay (eastern side of Tierra Verde Island).

N. abluma has been recorded from the Gulf, and
according to Hartman (1959) it probably inhabits warm
seas throughout the world.

249

Nereis arenaceodentata Moore, 1903
(Described and illustrated by Pettibone, 1963a)

Collections were made in Old Tampa Bay, upper Tampa
Bay, Boca Ciega Bay, Terra Ceia Bay, and lower Tampa Bay
at 71 survey stations. Six incidental collections came
from Boca Ciega and lower Tampa Bays. Most collections
were made in Boca Ciega Bay, where at one station (D-2)
342 specimens were found in a single dredge haul (table
95).

Average sediment type at dredge and shovel stations
was poorly sorted, fine sand composed of about 10 percent
shell, and containing little silt and clay, and less than
one percent organic carbon (table 96) .

More than one-half of these stations were vegetated
with a variety of algae, and some contained a mixture of
sea grasses as well.

Specimens with mature gametes were collected in
February, March, April, May, September, and November.
Juveniles were found in May, October, and November.

N. arenaceodentata has world-wide distribution in
warm and temperate waters where it is generally associated
with coarse sediments and sessile bottom organisms. This

250

species has been recorded in the Gulf of Mexico, and in
Tampa Bay, it has been implicated in shell blister forma-
tion in the quahog clam, Mercenaria campechiensis .

251

Table 95. — Nereis arenaceodentata — Locality records and
number of individuals from survey stations,
Tampa Bay, Florida, 1963-69 (D-dredge, S-shovel,
N-net)

Old Tampa Bay

Stations

Ind

ividuals Stations

Individuals

D

S

N

D S N

5-7

2

Upper Tampa Bay

D

10-2

12-1

1

1

3

12-7

13-1-A

13-1-B

4

12
3

Boca Ciega Bay

BC-C

4

BC-G

9

BC-I

1

BC-M

23

10

BC-N

14

0-1

6

5

D-2

342

2

D-3

66

D-5

10

D-6

3

D-9

24

D-ll

1

D-12

6

D-13

1

3

D-17

2

2

D-18

2

D-23

1

D-24

9

D-2 5

7

PB-1

1

PB-4 166 178 7

PB-5 6

14-4 3

15-1 9

15-2 15

15-4 2

15-6 1

15-11 15 5

15-12 12 13

15-13 10 1

15-14 1

15-15 209 7

15-16 3

15-17 10

16-1 9

16-3 39

16-4 115

16-5 78

16-7 72

16-8 23 2

Terra Ceia Bay
E-4 1 E-6

252

Table 95. — Nereis arenaceodentata — Locality records and
number of individuals from survey stations,
Tampa Bay, Florida, 1963-69 (D-dredge, S-shovel,
N-net)-( continued)

Lower Tampa Bay

Stations

Individuals Stations

Individuals

D S N

D 5 N

14-5

7

14-6

4

14-9

4

14-16

3

14-20

1

15-18

39

1

15-19

1

15-20

1

15-21

1

15-33

1

16-9

5

1

16-9-A

18

16-9-B

23

16-16

1

16-24

1

16-25

3 0

16-26

12

16-28

1

17-8

4

17-12

1

17-14

4

17-15

19

253

Table 96. — Nereis arenaceodentata — Mean and range of
observed environmental factors from survey
stations, Tampa Bay, Florida, 1963-69

Number
Factor Mean Range observations

Water temperature (*C.)

Salinity (%„)

pH

Depth (m.)

Sediment type

Granules (wt. %)

Sands (wt. %)

Silts (wt. %)

Clay (wt. %)

CaC03 (wt. %)

Organic carbon (wt. %)

Organic nitrogen (wt. %)

Mean grain size,

total sample (0) 2.5 0.5 to 4.1 70

Standard deviation,

total sample (0) 1.3 0.6 to 2.5 70

Skewness, total sample 0.1 -1.7 to 1.9 70

Kurtosis, total sample 9.1 -0.4 to 35.0 69

Mean grain size,

noncarbonate fraction (0) 2.9 1.9 to 3.9 64

Standard deviation,

noncarbonate fraction (0) 2.0 0.5 to 3.9 64

Mean grain size,

carbonate fraction (0) 0.2 -2.5 to 2.5 58

Standard deviation,

carbonate fraction (0) 1.2 0.1 to 2.9 58

22.8

13.0

to

31.0

72

31.5

22.4

to

35.1

72

8.1

7.7

to

8.5

70

0.7

Z1

to

2.3

72

sand

shelly sand to
silty sand

70

3.2

0.0

to

21.4

70

92.7

72.5

to

99.5

70

3.3

0.0

to

22.8

70

0.8

0.0

to

5.2

69

10.1

0.9

to

50.5

70

0.7

0.0

to

6.9

55

0.04

0.00 to 0.19

55

254

Nereis pelaglca occldentalls Hartman, 1945

This nereid was not found in Hillsborough or Terra
Ceia Bays, but occurred in all other areas of the Es-
tuary at a total of 69 survey and 13 incidental stations.
As with N. arenaceodentata , the population center appeared
to be Boca Ciega Bay. The worm was especially abundant
in Bunces Pass (BC-N) where 123 individuals were collected
in one dredge haul (table 97).

Sediment analyses showed that the worm was found
mostly in poorly sorted, fine sand that contained less
than 10 percent shell, about four percent silt and clay,
and less than one percent organic carbon (table 98).

One-half of the dredge and shovel stations contained
algae and some had shoal grass, turtle grass, and manatee
grass.

Epitokes were found in April, May, July, August,
September, October, and November, while juveniles were
collected in February, May, July, August, September,
October, November, and December.

N. p_. occidentalls has been collected along the
south Atlantic seaboard from North Carolina to the Gulf
of Mexico.

255

Table 97. — Nereis pelaqica occldentalls — Locality records
and number of individuals from survey stations,
Tampa Bay, Florida, 1963-69 (D-dredge, S-
shovel, N-net)

Old Tampa

Bay

Stations

Individuals

Stations

Individuals

D S N

r.

D S N

3-17
5-1-A

1
1

6-4-A
6-7-A

1

1

Upper

Tampa

Bay

D 11 10-6 1

10-1-A 13 11-1 2

10-2 2 11-3 5 2

10-3 43 12-1 2

10-4 1 13-1-A 1

10-5 1 13-2 1

Boca Ciega Bay

3C-A

8

6

BC-C

46

BC-G

2

BC-I

3

2

BC-M

13

82

BC-N

123

22

D-2

23

66

D-3

46

D-4

1

D-6

1

D-8

1

D-12

2

D-17

1

12

D-18

64

D-19-A

2

3

D-22

2

18

D-23

1

4

D-25

36

22

D-26

10

PB-1

25

PB-4

47

2

71

PB-5

184

14-4

5

15-1

20

15-3

11

8

1

15-4

1

15-6

10

15-11

6

15-12

1

15-14

1

15-17

1

16-1

28

1

16-2

6

16-5

1

16-6

1

1

16-8

7

2

256

Table 97. — Nereis pelaqica occidentalis — Locality records
and number of individuals from survey stations,
Tampa Bay, Florida, 1963-69 (D-dredge, S-
shovel, N-net)-(continued)

Lower Tampa Bay

Stations

Individuals Stations

Individuals

D S N

D S N

14-5

3

1

14-6

3

3

14-17

1

1

15-18

1

15-20

26

15-21

5

15-28

1

15-32

4

16-9

1 4

16-9-A

8

16-9-B

73

16-10

12

82

16-11

10

7

16-25

2

17-8

1

17-12

3

18-3

3

257

Table 98. — Nereis pelagica occidentalis — Mean and ranye
of observed environmental factors from survey
stations, Tampa Bay, Florida, 1963-69

Number
Factor Mean Range observations

Water temperature (*C.)

Salinity (%„)

PH

Depth (m.)

Sediment type

Granules (wt. %)

Sands (wt. %)

Silts (wt. %)

Clay (wt. %)

CaC03 (wt. %)

Organic carbon (wt. %)

Organic nitrogen (wt. %)

Mean grain size,

total sample (0) 2.4 0.8 to 4.3 57

Standard deviation,

total sample (0) 1.3 0.5 to 2.5 57

Skewness, total sample 0.0 -1.7 to 1.7 57

Kurtosis, total sample 9.7 -0.2 to 41.2 56

Mean grain size,

noncarbonate fraction (0) 3.2 1.9 to 8.4 51

Standard deviation,

noncarbonate fraction (0) 1.3 0.6 to 2.8 51

Mean grain size,

carbonate fraction (0) 0.4 -2.5 to 3.0 44

Standard deviation,

carbonate fraction (0) 1.2 0.6 to 2.8 44

23.4

15.0 to 33.2

59

31.0

22.4 to 35.1

59

8.1

7.1 to 8.5

58

0.8

£1 to 3.0

59

sand

shelly sand to
silty sand

57

3.1

0.0 to 21.4

57

92.4

69.9 to 99.9

57

3.0

0.0 to 15.8

57

1.1

oTo to 14.3

56

10.6

1.1 to 38.2

57

0.8

0.01 to 6.9

39

0.03

0.00 to 0.2

29

258

Nereis succlnea (Frey and Leuckart, 1847)
(Described and illustrated by Pettibone, 1963a)

One of the truly ubiquitous species in Tampa Bay, N.
succlnea was collected in all areas at 233 survey stations
and 19 incidental localities. Large collections of over
30 specimens per dredge haul were taken in all areas of
the Estuary except lower Tampa Bay, and there it was not
unusual to capture more than five at a station (table 99).

Average sediment at dredge and shovel stations was
poorly sorted, fine sand that contained 10 percent shell,
over five percent silt and clay, and less than one per-
cent organic carbon. Nearly four percent of the shell was
in the granule size range (table 100).

Forty-four percent of the bottom samples contained
vegetation that consisted of algae, and one or more species
of all the sea grasses found in the Estuary.

Epitokes were collected in February, April, June, July,
August, September, October, November, and December. Juve-
niles were recorded in April, May, June, July, August, Sep-
tember, October, November, and December.

N. succlnea has been collected on the California coast
and on both sides of the Atlantic in temperate and tropical
waters. It is well known in the Gulf of Mexico.

259

Table 99. — Nereis succinea — Locality records and number

of individuals from survey stations, Tampa Bay,
Florida, 1963-69 (D-dredge, S-shovel, N-net)

Old Tampa Bay

Stations Individuals Stations Individuals

A

2

10

A-l

31

2

A-3

65

A-5

3

B

32

5

B-l

22

3

B-2

11

5

B-3

15

1-1

4

1-2

3

1

1-3

5

11

1-4

3

18

1-5

14

2 3

2-1

7

2-2

6

14

2-3

3

5

2-4

5

2-5

2

3-1-A

147

3-2

1

3-8

1

3-10

1

3-11

1

3-12

5

3

3-13

4

1

3-14

4

16

3-15

3

2

3-16

1

3-17

5

4-1

3

4-2

5

4-3

3

4-4

1

1

4-5

1

4-6

7

1

4-7

5

2

4-8

2

2

4-9"

10

4-10

4

4-11

3

14

4-12

2

1

4-13

1

2

4-14

1

4-15

1

4-16

2

8

4-18-A

6

4-19

3

25

5-1-A

2 1

5-2

15

5

5-3

8

1

5-4

19

5-5

1

5-11

1

5-12

3

6-1-A

6 2

6-1-C

7

6-1-D

74

6-2

16

63

6-3

1

91

6-4-A

3

1

6-5

3

6-8

1

260

Table 99. — Nereis succinea — Locality records and number

of individuals from survey stations, Tampa Bay,
Florida, 1963-69 (D-dredge, 5-shovel, N-net)-
(continued)

Hillsborough Bay

Stations

Individuals Stations

Individuals

D S N

D S N

C

33

C-2

71

71

C-3

96

212

C-4

23

C-5

4

3

C-6

2

C-7

2

C-8-1

4

C-8-2

3

C-9

8

7-1

1

7-3

1

8-2

4 7

8-3

2

8-6

142

8-7

7

8-8

42

8-9

2 7

21

9-2

37

9-3

40

141

9-4

27

18

9-7

4

9-8

5

9-9

1

11

10-15

24

59

10-16

9

23

10-18

44

10-19

1

13

10-20

1

10-22

74

340

10-23

5 68

261

Table 99. — Nereis succlnea — Locality records and number

of individuals from survey stations, Tampa Bay,
Florida, 1963-69 (D-dredge, S-shovel, N-net)-
( continued)

Upper Tampa Bay

Stations

Individuals Stations

Individuals

D S N

D S N

D

3

10-0

2

10-1 -A

4

10-3

1 39

10-4

21

25

10-5

2

10-6

9

16

10-7

2

10-9

3

3

10-10

12

25

10-11

5

5

10-12

8

10-13

16

1

10-14-A

16

52

11-3

3

6

11-4

4

10

11-5

2

11-6

2

11-15

7

11-16

2

9

11-20

11

11-21

5

11-22

2

15

11-23

22

20

11-24

3 4

89

11-25

64

19

11-26

58

17

11-27

30

20

11-28

12

11-28-1

297

11-28-2

43

12-1

1

12-2

4

12-3

1

1

12-4

1

12-5

7

1

12-6

5

12-7

9

3

12-8

9

12-9

18

12-10

9

2

12-11

15

12-12

6

12-14

23

12-15

7

2

12-16

17

2

13-1-A

4

13-4

1

13-5

22

1

13-6

10

13-7

13

13-8

1

1

13-9

2

13-10

1

4

13-12

3

1

13-13

22

262

Table 99. — Nereis succinea — Locality records and number

of individuals from survey stations, Tampa Bay,
Florida, 1963-69 (D-dredge, S-shovel, N-net)-
( continued)

Boca Ciega Bay

Stations

Individuals Stations

Individuals

D S N

D S N

BC-A

15

23

BC-E

8

BC-G

1

BC-I

28

10

BC-M

2

6

BC-N

268

39

D-l

1

D-2

1

D-8

2

D-ll

1

D-15

6

D-l 7

4

D-18

24

D-22

14

D-2 5

1

D-26

1

PB-1

1

12

PB-4

10

PB-5

39

14-2

9

5

14-3

26

14-4

21

5

15-1

6

15-4

6

15-5

1

15-6

3

15-8

2

1

15-11

9

15-12

1

1

15-14

2

16-1

1

16-6

1

6

16-8

4

Terra Ceia Bay

E-l

74

387

E-2

44

5-3

23

151

E-4

1

5

E-5

5

E-6

36

88

E-7

72

1

E-8

4

263

Table 99. — Nereis succinea — Locality "records and number

of individuals from survey stations, Tampa Bay,
Florida, 1963-69 (D-dredge, S-shovel, N-net)-
(continued)

Lower Tampa Bay

Stations

Individuals Stations

Individuals

D S N

D S N

14-5

1

3

14-6

4

14-8

4

14-9

6

14-10

16

14-11

3

14-12

2

14-13

5

14-15

4

14-16

5

3

14-17

3

14-19

3

14-20

1

15-21

4

1

15-22

6

15-23

1

6

15-25

1

15-26

1

3

15-27

3

15-31

5

16-9

1

16-10

16

44

16-11

13

5

16-14

2

16-15

1

16-17

14

16-19

1

2

16-20

1

40

16-21

3

11

16-22

2

16-26

8

16-27

8

2

17-2

7

5

17-5

28

17-6

3

36

17-7

1

7

17-8

9

17-9

3

8

17-11

1

17-12

1

17-13

1

17-15

4

18-4

1

264

Table 100. — Nereis succinea — Mean and range of observed
environmental factors from survey stations,
Tampa Bay, Florida, 1963-69

Factor

Mean

Range

Number
observations

Water temperature (*C.)

Salinity (%«, )

pH

Depth (m.)

Sediment type

Granules (wt. %)

Sands (wt. %)

Silts (wt. %)

Clay (wt. %)

CaC03 (wt. %)

Organic carbon (wt. %)

Organic nitrogen (wt. %)

Mean grain size,
total sample (0)

Standard deviation,
total sample (0)

Skewness, total sample

Kurtosis, total sample

Mean grain size,
noncarbonate fraction (0)

Standard deviation,
noncarbonate fraction (0)

Mean grain size,
carbonate fraction (0)

Standard deviation,
carbonate fraction (0)

25.6

12.8 to 34.1

185

26.1

1.2 to 35.1

184

7.9

7.1 to 8.5

165

1.0

£1 to 4.0

185

sand

shelly sand to
sandy clay

180

3.7

0.0 to 79.7

179

90.2

8.6 to 100

179

3.3

0.0 to 53.1

179

2.3

0.0 to 65.9

178

12.0

0.6 to 95.0

178

0.8

0.03 to 8.5

115

0.1

0.00 to 0.2

115

2.5

-4.0 to 7.6

178

1.3

0.5

to

3.8

178

0.6

-1.7

to

3.6

178

11.8

-1.5

to

76.3

177

3.1

1.4

tc

9.0

175

1.5

0.4

to

3.4

175

-0.3

-2.6

to

3.0

158

1.3

0.02 to 3.1

158

265

Nlcon lackeyi Hartman, 1958

Individuals were collected by net at two stations
in Hillsborough Bay, and by net and shovel at two sta-
tions in upper Tampa Bay (table 101).

The only available sediment data came from station
11-2 where the bottom was moderately sorted, fine sand
that contained about two percent organic carbon (table
102).

No vegetation was noted at this station.

One gravid individual was collected in September,
and a juvenile was taken in August.

This unusual worm was previously known only from a
warm, mineral spring that enters the Myakka River near
U. S. Highway 41 in Sarasota County, Florida. This
report is the first record for the Gulf of Mexico.

266

Table 101. — Nicon lackeyi — Locality records and number
of individuals from survey stations, Tampa
Bay, Florida, 1963-69 (D-dredge, S-shovel,
N-net)

Hillsborough Bay

Stations

Individuals Stations

Individuals

D S N

D S N

C-3

1 9-9

2

Upper Tampa Bay

11-1

25 11-2

1

267

Table 102 — Nicon lackeyi — Mean and range of observed

environmental factors from survey stations,
Tampa Bay, Florida, 1963-69

Number
Factor Mean Range observations

Water temperature (°C.) 28.5 — 1

Salinity (%. ) 24.2 — 1

pH 7.9 — 1

Depth (m.) 0.3 — 1

Sediment type sand — 1

Granules (wt. %) 0.1 — 1

Sands (wt. %) 99.3 — 1

Silts (wt. %) 0.4 — 1

Clay (wt. %) 0.3 — 1

CaC03 (wt. %) 1.3 — 1

Organic carbon (wt. %) 1.6 — 1

Organic nitrogen (wt. %) 0.3 — 1

Mean grain size,

total sample (0) 2.5 — 1

Standard deviation,

total sample (0) 0.8 — 1

Skewness, total sample 0.5 — 1

Kurtosis, total sample 12.7 — 1

Mean grain size,

noncarbonate fraction (0) 8.1 — 1

Standard deviation,

noncarbonate fraction (0) 2.5 — 1

Mean grain size,

carbonate fraction (0) — —

Standard deviation,
carbonate fraction (0)

268

Perlnereis florldana (Ehlers, 1868)
(Described by Hartman, 1951)

Collections came from two survey stations in Old
Tampa Bay and one in Boca Ciega Bay. Incidental col-
lections were limited to two localities in Boca Ciega
Bay and a single one in lower Tampa Bay (table 103).

Although sediment data is meagre, it is probably
representative for the species as all collections came
from oyster reefs or areas nearby (table 104).

Algae and shoal grass were recorded at one station.

A sexually mature specimen was collected in August,
but no juveniles were found.

P. floridana is apparently associated with shell and
other bottom debris, and has been collected only in the
eastern Gulf of Mexico from the Florida keys north to
Seahorse Key, Florida.

269

Table 103. — Perinerels f loridana — Locality records and
number of individuals from survey stations,
Tampa Bay, Florida, 1963-69 (D-dredge, 3-
shovel, N-net)

Old Tampa Bay

Stations

Individuals Stations

Individuals

D S N

D S N

A-l

17 6-1-D

1

Boca Ciega Bay

16-8

1

270

Table 104. — Perinerels f loridana — Mean and range of ob-
served environmental factors from survey
stations, Tampa Bay, Florida, 1963-69

Number
Factor Mean Range observations

Water temperature (°C.)

Salinity (%,)

pH

Depth (m.)
Sediment type

Granules (wt. %)

Sands (wt. %)

Silts (wt. %)

Clay (wt. %)

CaC03 (wt. %)

Organic carbon (wt. %)

Organic nitrogen (wt. %)

Mean grain size,

total sample (0) 1.7 0.6 to 2.8

Standard deviation,
total sample (0)

Skewness, total sample

Kurtosis, total sample

Mean grain size,
noncarbonate fraction (0)

Standard deviation,
noncarbonate fraction (0)

Mean grain size,

carbonate fraction (0) -0.8 -0.9 to -0.7

Standard deviation,

carbonate fraction (0) 2.1 1.3 to 2.8

29.0

28.0

to

30.0

2

25.0

24.1

to

25.9

2

7.6

7.1

to

8.0

2

0.3

«

2

sand

shelly sand
to sand

2

17.2

0.0

to

34.5

2

78.4

58.0

to

98.8

2

2.6

0.3

to

5.0

2

1.8

0.9

to

2.6

2

9.5

0.9

to

18.1

2

0.7

—

1

0.1

1

2.3

0.8

to

3.8

2

1.0

-0.1

to

2.2

2

14.7

-0.7

to

30.1

2

3.2

2.9

to

3.6

2

1.9

1.6

to

2.3

2

271

Platvnerels dumerilli (Audouln and Milne-Edwards, 1833)
(Described and illustrated by Pettibone, 1963a)

This nereid is commonly associated with bottom vege-
tation and was found in all areas of the Estuary at a
total of 48 survey stations, and three incidental locali-
ties in Boca Ciega Bay and upper Tampa Bay (table 105).

The 12 dredge and shovel samples all contained more
than 80 percent sand that was mostly fine and poorly
sorted. Few large shell particles were present and the
percentages of silt, clay and organic carbon were low
(table 106).

Eight of the bottom samples contained algae and some
also had shoal, turtle, manatee, and widgeon grass.

Gravid specimens were collected in May, June, Sep-
tember, and November. Juveniles were found in May, July,
August, September, October, November, and December.

P. dumerllii has been reported from the Gulf of
Mexico, and from warm and temperate seas in many other
areas throughout the world.

272

Table 105. — Platynereis dumerllii — Locality records and
number of individuals from survey stations,
Tampa Bay, Florida, 1963-69 (D-dredge, S-
shovel, N-net)

Old Tampa Bay

Stations

Individuals

Stations

Individuals

1-2

2-2

2-3

3-13

4-1

5-2
6-1 -A

6-1-C

6-3

6-4-A

3-4

Hillsborough Bay

10-19

Upper Tampa Bay

10-1-A

10-2

10-4

10-10
12-11
13-2

Boca Ciega Bay

BC-M

1

2

BC-N

1

D-25

3 42

PB-4

5

30

14-4

2

15-14

1

15-16

2

1

16-1
16-2
16-4
16-5
16-6
16-8

Terra Ceia Bay

12

10

1
1
1

1

E-e

273

Table 105. — Platynereis dumerilii — Locality records and
number of individuals from survey stations,
Tampa Bay, Florida, 1963-69 (D-dredge, S-
shovel, N-net)-(continued)

Lower Tampa Bay

Stations

Individuals

Stations

Individuals

14-5

14-9

14-17

14-18

15-18

15-20

15-29

16-9

16-10

16-26

17-1

17-2

17-12

17-13

17-15

18-3

274

Table 106. — Platynereis dumerilll — Mean and range of ob-
served environmental factors from survey
stations, Tampa Bay, Florida, 1963-69

Number
Factor Mean Range observations

Water temperature (*C.)

Salinity (%„ )

pH

Depth (m.)

Sediment type

Granules (wt. %)

Sands (wt. %)

Silts (wt. %)

Clay (wt. %)

CaC03 (wt. %)

Organic carbon (wt. %)

Organic nitrogen (wt. %)

Mean grain size,

total sample (0) 2.5 1.4 to 3.0 11

Standard deviation,
total sample (0)

Skewness, total sample

Kurtosis, total sample

Mean grain size,
noncarbonate fraction (0)

Standard deviation,
noncarbonate fraction (0)

Mean grain size,
carbonate fraction (0)

Standard deviation,
carbonate fraction (0)

23.5

17.4

to

31.0

12

30.8

24.1

to

34.5

12

8.1

7.7

to

8.4

11

0.6

n

to

4.0

12

sand

—

11

2.4

0.0

to

14.7

11

94.2

83.5

to

99.9

11

2.4

0.0

to

6.9

11

0.8

0.0

to

2.5

11

11.5

1.2

to

39.8

11

0.7

0.2

to

2.0

9

0.1

0.02 to 0.3

9

1.2

0.5

to

1.9

11

0.5

-1.4

to

1.6

1]

8.8

0.9

to

19.0

11

3.0

1.9

to

4.2

10

1.6

0.7

to

3.2

10

0.3

-1.8

to

2.3

10

0.9

0.2

to

1.4

10

275

Rullierlnerels mexicana (Treadwell, 1942)
(Described and illustrated by Pettibone, in press)

Two specimens were collected by net at station D-25
in Boca Ciega Bay, and over 50 were taken at an incidental
station nearby (table 107).

No data on sediment type or bottom vegetation are
available.

The worms were swarming at the surface when col-
lected on the evening of April 4, 1968. Both epitokous
males and females were present in the mating swarm.

R. mexicana is otherwise known only from the Pacific
Ocean.

276

Table 107. — Rullierinereis mexicana — Locality records

and number of individuals from survey stations,
Tampa Bay, Florida, 1963-69 (D-dredge, S-
shovel, N-net)

Boca Ciega Bay

Stations

Individuals Stations

Individuals

D S N

D S N

D-25

2

277

Family NEPHTYIDAE Grube, 1850
The nephtyids have been regarded as both predatory
and omnivorous feeders that actively burrow in predomi-
nantly sandy sediments throughout the world.

Four species were found in Tampa Bay. Two of these,
Aglaophamus verrilli and Nephtys picta were collected in
all six areas of the Estuary, while Nephtys bucera was
taken in Boca Ciega Bay and lower Tampa Bay. Nephtys
magellanica was taken only in Boca Ciega Bay.
Key to NEPHTYIDAE Collected in Tampa Bay

1 Parapodial branchiae curved inward toward

the body Aglaophamus verrilli

Parapodial branchiae curved outward away

from the body 2

2 Eyes present; branchial filament short, about
twice the length of the branchial

cirrus Nephtys magellanica

- Eyes absent; tentacular cirri arise from center
of the tentacular segment; short lobe present

above the branchial cirrus Nephtys bucera

- Eyes absent; tentacular cirri arise from the
anterior half of the tentacular segment; short

lobe present below the branchial cirrus. . .Nephtys picta

Aglaophamus verrilli (Mcintosh, 1885)
(Described and illustrated by Pettibone, 1963a)

Specimens were collected at 83 survey stations in

all six areas of the Estuary, and one incidental locality

278

on an extensive sand bar south of Gandy Bridge in Old
Tampa Bay (table 108) . Large collections of over 20
individuals per dredge haul were made in Old Tampa Bay,
and upper and lower Tampa Bay. The greatest number (135)
came from station 11-5 in upper Tampa Bay.

Although average sediment type proved to be poorly
sorted, fine sand, specimens were also found in areas of
silty sand and silty mud. The sand size category was
about 12 percent shell, average content of silt and clay
was five percent, and organic carbon was less than one
percent. No specimens were captured by shovel, six were
taken by net, and the remainder came from dredge hauls in
water generally deeper than lm. (table 109).

Twenty-five of the dredge samples contained vegetation
that included algae, and shoal and turtle grass.

No specimens with mature gametes were noted, but juve-
niles were collected in June through December.

This species has been reported from the central and
eastern Pacific, and along the Atlantic coast from Mary-
land to Georgia and the Gulf of Mexico.

279

Table 108. — Aglaophamus verrilli — Locality records and
number of individuals from survey stations,
Tampa Bay, Florida, 1963-69 (D-dredge, S-
shovel , N-net)

Old Tampa Bay

Stations

Individuals

Stations

Individuals

1-2

1

3-3

1

3-8

3

3-9

10

3-10

3

3-11

30

3-12

13

4-11

1

10-15
10-17

10
5

4-12

1

4-14

3

4-16

18

4-1 7-A

8

4-18-A

3

5-5

2

5-10

1

6-6

1

Hillsborough Bay

10-19

Upper Tampa Bay

10-4

2

10-6

9

10-7

54

10-8

20

10-9

36

10-10

1

11-4

55

11-5

135

11-6

18

11-7

1

11-9

1

11-16

1

11-17

1

11-27

1

12-2

4

12-3

2

12-4

21

12-5

1

12-7

1

12-12

1

12-14

49

12-16

3

13-7

2

13-10

1

13-12

.'.

280

Table 108. — Aqlaophamus verrilli — Locality records and
number of individuals from survey stations,
Tampa Bay, Florida, 1963-69 (D-dredge, S-
shovel, N-net)-(continued)

Boca Ciega Bay

Stations

Individuals Stations

Individuals

D S N

D S N

BC-A

2

BC-A-1

1

BC-E

5

D-22

i

P3-1

1

PB-5

2

14-3

7

15-6

2

15-11

3

15-13

2

15-14

3

16-6

16

Terra Ceia Bay

E-4 1 e-5 11

Lower Tampa Bay

14-6

2

14-7

1

14-8

3

14-9

5

14-10

23

14-13

15

14-14

1

14-17

3

15-22

1

16-10

32

16-11

5

16-20

5

16-21

5

16-22

3

16-23

3

17-2

2

17-5

46

17-6

21

17-7

21

17-8

42

17-9

4

17-10

6

17-12

4

17-15

18-4

7

281

Table 109. — Aqlaophamus verrilli — Mean and range of ob-
served environmental factors from survey
stations, Tampa Bay, Florida, 1963-69

Factor

Number

Mean

Ranqe

observations

24.2

13.0 to

33.8

84

28.0

20.5 to

34.6

84

8.0

7.0 to

8.9

77

1.5

n to

4.0

84

sand

sand to

84

silty mud

1.6

0.0 to

12.6

84

93.2

31.9 to

100

84

3.3

0.0 to

45.3

84

1.7

0.0 to

22.0

84

12.2

0.7 to

58.4

84

0.7

0.1 to

8.5

64

0.03

0.00 tc

i 0.2

64

Water temperature (,C.)
Salinity (%.)

pH

Depth (m.)

Sediment type

Granules (wt. %)

Sands (wt. %)

Silts (wt. %)

Clay (wt. %)

CaC03 (wt. 50

Organic carbon (wt. %)

Organic nitrogen (wt. %)

Mean grain size,

total sample (0) 2.6 1.6 to 5.9 84

Standard deviation,
total sample (0)

Skewness, total sample

Kurtosis, total sample

Mean grain size,
noncarbonate fraction (0)

Standard deviation,
noncarbonate fraction (0)

Mean grain size,

carbonate fraction (0) -0.1 -2.5 to 3.0 70

Standard deviation,

carbonate fraction (0) 1.3 0.3 to 3.1 70

1.2

0.4

to

2.7

84

0.6

-1.4

to

3.6

84

4.2

-0.9

to

96.3

84

3.0

1.4

to

9.0

31

1.4

0.5

to

3.2

81

282

Nephtys bucera Ehlers, 1868
(Described and illustrated by Pettibone, 1963a)

A single specimen was taken by dredge at station
BC-N in Boca Clega Bay and others were dug by shovel
near Mullet Key in lower Tampa Bay (table 110).

Unfortunately, sediment data for the dredge station
are not available, other environmental factors, however,
are presented (table 111).

None of the specimens were gravid, and no juveniles
were collected.

N. bucera is known from the Atlantic seaboard between
Canada and North Carolina, and in the Gulf of Mexico.

283

Table 110. — Nephtys bucera — Locality records and number

of individuals from survey stations, Tampa Bay,
Florida, 1963-69 (D-dredge, S-shovel, N-net)

BC-N

Boca Ciega Bay

Stations Individuals Stations Individuals
D S N D S N

284

Table 111. — Nephtys bucera — Mean and range of observed
environmental factors from survey stations,
Tampa Bay, Florida, 1963-69

Number
Factor Mean Range observations

Water temperature (*C.) 29.4 — 1

Salinity (%.) 34.0 — 1

pH 8.0 — 1

Depth (m.) 2.3 — 1

Sediment type — —

Granules (wt. %)

Sands (wt. %)

Silts (wt. %)

Clay (wt. %)

CaC03 (wt. %)

Organic carbon (wt. %) — — —

Organic nitrogen (wt. %) — — —

Mean grain size,

total sample (0) — —

Standard deviation,

total sample (0) — —

Skewness, total sample — — —

Kurtosis, total sample — — —

Mean grain size,

noncarbonate fraction (0) — — —

Standard deviation,

noncarbonate fraction (0) — — —

Mean grain size,

carbonate fraction (0) — —

Standard deviation,
carbonate fraction (0)

285

Nephtys magellanica Augener, 1912
(Described and illustrated by Hartman, 1968)

A single specimen, in poor condition, was collected
at station BC-N in Boca Ciega Bay (table 112).

The sediment there was over 95 percent moderately
sorted sand, of which better than 25 percent was shell
(table 113).

No vegetation was recorded at the collection site.

Neither gravid nor juvenile specimens were collected.

N. magellanica, as far as I know, has been collected
previously only in the eastern Pacific and in the Gulf of
Mexico at Seahorse Key, Florida.

286

Table 112. — Nephtys maqellanica — Locality records and

number of individuals from survey stations,
Tampa Bay, Florida, 1963-69 (D-dredge, S-
shovel, N-net)

Boca Ciega Bay

Stations

Individuals Stations

Individuals

D S N

D S N

BC-N

1

287

Table 113. — Nephtys maqellanica — Mean1 and range of observed
environmental factors from survey stations,
Tampa Bay, Florida, 1963-69

Number
Factor Mean Range observations

Water temperature (*C.) 15.0 — 1

Salinity {%.) 31.3 — 1

pH 7.9 — 1

Depth (m.) 2.3 — 1

Sediment type sand — 1

Granules (wt. %) 4.2 — 1

Sands (wt. %) 95.8 — 1

Silts (wt. %) 0.6 — 1

Clay (wt. %) 0.0 — 1

CaC03 (wt. %) 25.9 — 1

Organic carbon (wt. %) — — —

Organic nitrogen (wt. %) — — —

Mean grain size,

total sample (0) 1.5 — 1

Standard deviation,

total sample (0) 0.8 — 1

Skewness, total sample -1.7 — 1

Kurtosis, total sample 0.3 — 1

Mean grain size,

noncarbonate fraction (0) — —

Standard deviation,

noncarbonate fraction (0) — — —

Mean grain size,

carbonate fraction (0) — — —

Standard deviation,

carbonate fraction (0) — — —

288

Nephtys plcta Ehlers, 1868
(Described and illustrated by Pettibone, 1963a)

N. picta was collected at 38 survey stations in all
six areas of the Estuary (table 114) . The area of great-
est abundance was Old Tampa Bay where 10 or more indivi-
duals were collected in a dredge haul at two locations.

Average sediment type at dredge and shovel stations
was poorly sorted, fine sand that contained little shell,
less than five percent silt and clay, and less than one
percent organic carbon. No specimens were found in soft
sediments (table 115).

Nine of the bottom samples contained vegetation. A
mixture of algae was present, and shoal grass occurred at
two.

A gravid specimen was collected in October and a
juvenile was found in June.

This worm is common on the Atlantic coast from
Massachusetts to South Carolina. It had been collected
in the Gulf of Mexico prior to this survey.

289

Table 114. — Nephtys plcta — Locality records and number
of individuals from survey stations, Tampa
Bay, Florida, 1963-69 (D-dredge, S-shovel,
N-net)

Old Tampa Bay

Stations

Individuals

Stations

Individuals

B

2

1-4

3

3-3

1

3-8

6

3-9

6

3-11

10

3-12

5

3-16

4-7

1

4-8

3

4-9

4-12

4-14

4-15

4-16

4-1 7-A

4-18-A

4-19

5-2

5-3

13

3
2

9
1
4
1
1

Hillsborough Bay

C-2

10-22

Upper Tampa Bay

10-4
11-5
11-6

12-6 1
12-9 1

12-14 1

11-20

1

Boca Ciega Bay

14-2

1

Terra Ceia Bay

E-l

1

290

Table 114. — Nephtys picta — Locality records and number
of individuals from survey stations, Tampa
Bay, Florida, 1963-69 (D-dredge, 3-shovel,
N-net)-( continued)

Lower Tampa Bay

Stations

Individuals Stations

Individuals

D S N

D S N

14-14

1

16-15

1

16-22

1

16-27

1

17-6
17-7
18-3

291

Table 115. — Nephtys plcta — Mean and range of observed

environmental factors from survey stations,
Tampa Bay, Florida, 1963-69

Factor

Mean

Ranc

le

Number
observations

Water temperature (*C.)

27.0

15.5

to

31.5

36

Salinity <.%.)

25.6

18.5

to

33.8

36

PH

8.0

7.1

to

8.3

30

Depth (m.)

1.5

n

to

3.0

36

Sediment type

sand

shelly s
to sand

;and

36

Granules (wt. %)

1.4

0.0

tc

20.8

36

Sands (wt. %)

94.5

77.4

to

99.3

36

Silts (wt. %)

2.3

0.3

to

9.1

36

Clay (wt. %)

1.9

0.2

to

6.3

36

CaC03 (wt. %)

8.0

0.8

to

57.4

36

Organic carbon (wt. %)

0.7

0.1

to

2.2

21

Organic nitrogen (wt. %)

0.1

0.0

tc

0.2

21

Mean grain size,
total sample (0)

2.6

0.9

to

3.4

3 6

Standard deviation,
total sample (0)

1.3

0.7

to

2.0

36

Skewness, total sample

1.0

-0.3

to

2.2

36

Kurtosis, total sample

12.3

-0.03 tc

i 41.2

36

Mean grain size,
noncarbonate fraction (0)

3.3

1.9

tc

9.0

36

Standard deviation,
noncarbonate fraction (0)

1.6

0.6

to

3.4

36

Mean grain size,
carbonate fraction (0)

-0.5

-2.5

to

2.2

33

Standard deviation,
carbonate fraction (0)

1.3

0.8

to

2.3

3 3

292

Family GLYCERIDAE Grube, 1850
Worms of this family burrow in sand or softer sedi-
ments, and their diet includes polychaetes and other small,
soft bodied, invertebrates as well as detritus. They have
world-wide distribution in seas at all latitudes.

Two species were found in Tampa Bay. Glycera
amerlcana was found throughout the Estuary, but the less
common, Glycera dibranchiata, was collected only in lower
Tampa Bay .
Key to GLYCERIDAE Collected in Tampa Bay

1 Retractile, branched branchiae arise on the
dorso-lateral body wall near the bases of
parapodia Glycera americana

Non-retractile branchiae arise as a pair of

simple lamellae above and below setigerous

lobes of parapodia Glycera dibranchiata

Glycera americana Leidy, 1855
(Described and illustrated by Pettibone, 1963a)

Specimens were collected at 129 survey stations in

all six areas of the Estuary and at incidental localities

in Old Tampa Bay (4) Boca Clega Bay (2) and lower Tampa

Bay (1). The major center of abundance was Old Tampa Bay

where 10 or more individuals were collected in a single

dredge haul at 34 stations. The greatest number in a

single collection (122) came from station 4-15 (table 116).

293

Sediment data from dredge and shovel stations show
that the worm was most commonly found in poorly sorted,
fine sand, but many also occurred in extremely fine sedi-
ments. As an average, shell comprised about 10 percent of
the sand size particles, and was also present in larger
particle classes. The silt and clay content was over five
percent, and organic carbon was under one percent (table
117).

About one-third of the dredge and shovel stations were
vegetated with algae, and also present at some were manatee,
shoal, turtle, and widgeon grass.

A gravid specimen was collected in October, and juve-
niles were noted in February, June, July, August, October,
November, and December. „

G. americana is a temperate or tropical species that
has been recorded from the central and eastern Pacific,
the western Atlantic, and the Gulf of Mexico.

294

Table 116. — Glycera americana — Locality records and number
of individuals from survey stations, Tampa Bay,
Florida, 1963-69 (D-dredge, S-shovel, N-net)

Old Tampa Bay

Stations

Individuals

Stations

Individuals

A

10

A-l

2

A- 2

2

A- 5

1

A-6

3

B

30

1

B-l

1

B-2

2

B-3

2

1-2

12

1-3

33

12

1-4

8 5

40

1-5

42

12

2-1

6

2-2

7

2-3

6

2-4

20

2-5

8

3-1-A

1

1

3-2

22

3-3

32

3-4

17

12

3-5

11

24

3-6

8

3-7

16

3-8

5 0

3-9

39

3-10

6

3-11

3 0

1

3-12

44

3-13

10

3-14

3

3-15

7

1

3-16

7

3-17

1

4-1

12

4-2

25

4-3

4-4

1

4-5

23

4-6

4 3

4-7

2 3

4-8

19

4-9

26

4-10

8

4-11

14

4-12

29

4-13

25

4-14

13

4-15

122

4-16

14

4-1 7-A

17

4-18-A

5

4-19

r>

5-1-A

3

5-2

13

5-3

13

5-4

17

5-5

17

5-6

4

5-7

1

5-8

1

5-11

1

5-13

1

6-1-A

2

6-1-B

2

6-1-C

4

6-1-D

1

6-2

3

6-3

6

6-4-A

1

6 -7-A

8

295

Table 116. — Glycera americana — Locality records and number
of individuals from survey stations, Tampa Bay,
Florida, 1963-69 (D-dredge, S-shovel, N-net)-
(continued)

Hillsbi

trough

Bay

Stations

Ind

iv:

Lduals

Stations

Individuals

D

S

N

D S N

C-3
C-7
9-3

12

7

2

9-4

10-15

10-22

3
1
6

Upper

Tampa

Bay

10-3

10-4

1

10-12

2

10-14-A

1

11-6

2

12-3

2

12-11

2

13-1-A

13-4

1

13-12

4

Boca Ciega Bay

BC-A

BC-E

1

BC-G

1

BC-H

8

BC-I

1

BC-M

1

BC-N

29

D-7

1

D-ll

3

8

D-23

1

D-25

PB-1

2 fa

PB-4

6

PB-5

7

14-3

10

14-4

12

15-4

1

15-14

1

16-6

2

10

Terra Ceia Bay

E-l
E-2
E-3

1
1

i

E-4

E-5

2 E-6

1
1

1

296

Table 116. — Glycera amerlcana — Locality records and number
of individuals from survey stations, Tampa Bay,
Florida, 1963-69 (D-dredge, S-shovel, N-net)-
( continued)

Lower Tampa Bay

Stations

Individuals Stations

Individuals

D S N

D S N

14-5

9

14-6

9

15-26

1

15-28

1

16-9-A

1

16-9-B

1

16-10

1

16-12

16-14

18

16-16

1

16-25

17-2

7

17-3

13

17-6

1

17-8

3

18-3

3

297

Table 117. — Glycera amerlcana — Mean and range of observed
environmental factors from survey stations,
Tampa Bay, Florida, 1963-69

Number
Factor Mean Range observations

Water temperature (*C.)

Salinity (%„)

pH

Depth (m.)

Sediment type

Granules (wt. %)

Sands (wt. %)

Silts (wt. %)

Clay (wt. %)

CaCO- (wt. %)

Organic carbon (wt. %)

Organic nitrogen (wt. %)

Mean grain size,

total sample (0) 2.6 -4.4 to 7.1 137

Standard deviation,
total sample (0)

Skewness, total sample

Kurtosis, total sample

Mean grain size,
noncarbonate fraction (0)

Standard deviation,
noncarbonate fraction (0)

Mean grain size,

carbonate fraction (0) -0.4 -2.6 to 2.5 116

Standard deviation,

carbonate fraction (0) 1.3 0.2 to 3.1 116

26.5

13.0 to 33.8

139

27.1

16.4 to 35.1

139

7.9

7.0 to 8.5

113

1.0

£1 to 4.0

139

sand

shelly sand
to silt

137

2.7

0.0 to 79.7

137

90.4

5.5 to 99.8

137

4.0

0.0 to 89.4

137

2.8

0.0 to 65.9

137

9.9

0.6 to 95.0

137

0.8

0.01 to 6.9

72

0.1

0.e00 to 0.2

7 2

1.3

0.5

to

3.8

137

0.8

-1.7

to

3.6

137

12.7

-0.7

to

76.3

136

3.2

1.9

to

7.1

124

1.6

0.3

to

3.2

124

298

Glycera dibranchlata Ehlers, 1868
(Described and illustrated by Pettibone, 1963a)

A single specimen was collected at one station
(15-21) in lower Tampa Bay (table 118).

The sediment at this station was nearly all poorly
sorted, medium sand with a few large shell particles.
The percentages of silt and clay, and organic carbon,
were less than one (table 119) .

No vegetation was recorded from the dredge sample.

The specimen was mature, but not gravid.

G. dibranchiata is a temperate or tropical species
that is well known from east and west coasts of North
America, and the Gulf of Mexico.

299

Table 118. — Glycera dibranchiata — Locality records and
number of individuals from survey stations,
Tampa Bay, Florida, 1963-69 (D-dredge, S-
shovel, N-net)

Lower Tampa Bay

Stations

Individuals Stations

Individuals

D S N

D S N

15-21

1

300

Table 119. — Glycera dibranchiata — Mean and range of ob-
served environmental factors from survey
stations, Tampa Bay, Florida, 1963-69

Number
Factor Mean Range observations

Water temperature (*C.) 23.2 — 1

Salinity (%„) 31.2 — 1

pH 7.7 — 1

Depth (m.) 1.0 — 1

Sediment type sand — 1

Granules (wt. %) 2.7 — 1

Sands (wt. %) 97.0 — 1

Silts (wt. %) 0.2 — 1

Clay (wt. %) 0.1 — 1

CaC03 (wt. %) 7.2 — 1

Organic carbon (wt. %) 0.03 — 1

Organic nitrogen (wt. %) 0.02 — 1

Mean grain size,

total sample (0) 2.0 — 1

Standard deviation,

total sample (0) 1.0 — 1

Skewness, total sample -0.5 — 1

Kurtosis, total sample 6.9 — 1

Mean grain size,

noncarbonate fraction (0) 1.7 — 1

Standard deviation,

noncarbonate fraction (0) 0.7 — 1

Mean grain size,

carbonate fraction (0) -0.1 — 1

Standard deviation,

carbonate fraction (0) 1.3 — 1

301
Family GONIADIDAE Klnberg, 1866

As in the closely related Glyceridae, the Goniadids
are active, burrowing polychaetes that probably subsist
mainly on detritus, worms, and other small, benthic ani-
mals.

Two species, Glycinde pacifica and Goniadella sp.
were collected in Tampa Bay. The former was found common-
ly in all areas of the Estuary, and Goniadella sp. was
collected at a few stations in all areas except Hills-
borough Bay.

Key to GONIADIDAE Collected in Tampa Bay
1 Setae entirely compound Glycinde pacifica

Setae simple and compound; simple setae

are stout hooks Goniadella sp.

Glycinde pacifica Monro, 1928

This species was collected throughout the Estuary at
a total of 185 survey stations and incidental localities
in Boca Ciega Bay, upper Tampa Bay, and old Tampa Bay.
Dredge hauls containing 10 or more specimens were taken
several times in all areas of the Bay, and as many as 54
per haul came from station C-2 in Hillsborough Bay (table
120).

Although average sediment type was poorly sorted,
fine sand, the worm was collected at 14 stations that had

302

a high percentage of silt and clay, and at five where the
bottom was shelly sand. As an average, the silt-clay
content of sediments was nearly 12 percent and organic
carbon was less than one percent. Shell constituted about
nine percent of the sand size particle class, and about
two percent was in the granule category (table 121) .

One-third of the dredge and shovel stations contained
algae, and in addition, some had turtle, shoal, and mana-
tee grass.

Juvenile specimens were collected in May, July, August,
September, and November, but no adults with mature gametes
were noted.

G. pacifica was originally described from the Pana-
manian, coast near Taboga. As far as I know this report is
the first for the Gulf of Mexico.

303

Table 120. — Glycinde pacifica — Locality records and number
of individuals from survey stations, Tampa Bay,
Florida, 1963-69 (D-dredge, S-shovel, N-net)

Old Tampa Bay

Stations

Individuals

Stations

Individuals

A

4

A-2

1

A-6

2

a

18

B-2

3

B-3

1

1-3

6

10

1-4

13

45

1-5

14

8

2-5

1

3-1-A

1

3-2

3

3-3

1

3-4

3

12

3-5

2

36

3-6

2

4

3-7

5

5

3-8

8

3-9

2

3-11

7

3-12

21

2

3-13

2

3-15

1

3-16

1

4-1

6

4-2

7

5

4-3

1

4-4

2

6

4-5

7

4-6

17

1

4-7

13

8

4-8

11

2

4-9

26

4-10

4

1

4-11

17

4-12

22

4-13

23

9

4-14

3

2

4-15

4

15

4-16

8

8

4-1 7-A

9

4-19

14

1

5-1-A

1

5-2

6

5-3

17

5-4

13

5-5

4

5-6

5

6-1-A

4

6-1-B

1

6-1-D

1

6-2

5

6-4-A

24

6-5

5

304

Table 120. — Glycinde paciflca — Locality records and number
of individuals from survey stations, Tampa Bay,
Florida, 1963-69 (D-dredge, S-shovel, N-net)-
(continued)

Hillsborough

Bay

Stations

Individuals

Stations

Ind

ivi

duals

0

S N

D

S

N

C

3

9-6

1

C-2

54

1

9-9

1

C-3

3

10-15

6

21

8-2

1

10-16

6

1

8-8

6

10-17

7

1

9-1

2

10-22

6

2

9-3

31

4

10-23

1

9-4

16

8

Upper

Tampa

Bay

D

1

11-18

1

5

10-4

52

11-19

11

11

10-5

2

11-20

1

26

10-7

1

11-21

1

3 4

10-8

7

11-22

10

2 5

10-9

3

11-23

1

1

10-11

1

11-24

2

1

10-12

10

11-25

3

4

10-13

2

11-26

C

2

10-14-A

8

11-27

15

2

11-4

4

11-28

1

11-6

3

11-28-1

7

11-7

1

2

12-1

1

11-8

2

12

12-14

11

3

11-9

12

9

12-16

10

11-11

1

2

13-1-A

1

11-12

2

2

13-2

6

11-13

1

1

13-5

1

11-14

1

13-8

3

11-15

5

1

13-12

4

11-16

1

7

13-13

1

305

Table 120. — Glycinde pacif ica — Locality records and number
of individuals from survey stations, Tampa Bay,
Florida, 1963-69 (D-dredge, S-shovel, N-net)-
( continued)

Boca Ciega Bay

Stations

Individuals Stations

Individuals

D S N

D S N

BC-A

3 7

BC-C

1

BC-E

4

1

BC-H

4

BC-I

7

BC-M

11

BC-N

4

D-l

5

D-2

7

D-9

3

D-ll

1

D-12

1

D-l 7

2

1

D-21

1

D-22

2

D-23

1

D-2 4

6

D-2 5

3

PB-1

14

7

PB-4

3 0

1

PB-5

12

14-1-A

1

14-2

21

14-3

11

14-4

43

15-2

1

15-4

4

15-5

3

15-6

13

15-8

13

15-11

12

3

15-12

17

15-13

10

15-14

12

2

15-15

2

2

15-16

1

15-17

21

16-6

26

16-7

6

Terra Ceia Bay

E-l

18

E-2

E-3

28

E-4

15

10

E-5

6

E-6

18

E-7

39

306

Table 120. — Glyclnde pacif ica — Locality records and number
of individuals from survey stations, Tampa Bay,
Florida, 1963-69 (D-dredge, S-shovel, N-net)-
( continued)

Lower Tampa Bay

Stations

Individuals Stations

Individuals

D S N

D S N

14-5

26

14-6

8

14-7

1

14-8

1

14-12

5

14-17

1

14-18

33

14-19

15-18

10

15-19

3

15-20

3

15-21

9

15-31

10

15-32

3

12

16-9-A

16-11

1

16-19

1

16-21

1

16-22

1

16-23

1

16-24

1

16-25

16-27

4

17-10

4

17-12

8

17-13

1

17-14

4

18-3

8

307

Table 121. — Glycinde pacifica — Mean and range of observed
environmental factors from survey stations,
Tampa Bay, Florida, 1963-69

Number
Factor Mean Range observations

Water temperature (*C.) 25.5 12.8 to 33.8 188

Salinity (%.) 27.2 16.4 to 35.1 188

PH 8.0 7.0 to 9.0 158

Depth (m.) 1.1 £]. to 4.0 188

Sediment type sand shelly sand to 184

clayey silt

Granules (wt. %) 2.2 0.0 to 79.7 184

Sands (wt. %) 86.3 4.6 to 99.9 184

Silts (wt. %) 6.8 0.0 to 50.8 184

Clay (wt. %) 5.0 0.0 to 65.9 183

CaC03 (wt. %) 9.2 0.5 to 66.0 183

Organic carbon (wt. %) 0.7 0.03 to 8.5 123

Organic nitrogen (wt. %) 0.04 0.00 to 0.2 123

Mean grain size,

total sample (0) 3.0 -4.0 to 7.3 183

Standard deviation,

total sample (0) 1.4 0.2 to 3.5 183

Skewness, total sample 0.6 -2.2 to 3.6 183

Kurtosis, total sample 11.5 -1.3 to 76.3 182

Mean grain size,

noncarbonate fraction (0) 3.0 1.7 to 9.0 176

Standard deviation,

noncarbonate fraction (0) 1.4 0.4 to 3.1 175

Mean grain size,

carbonate fraction (0) -0.2 -2.6 to 3.0 163

Standard deviation,

carbonate fraction (0) 1.3 0.2 to 3.1 163

308

Gonladella sp.

This small goniadid is about 1.5 mm. wide (including
parapodia) and about 10 mm. long. The long, conical
prostomium has eight segments and four, terminal antennae
(figure 6, A). No eyes were observed. The pharynx on some
specimens was partially extended and contained rows of
papillae (figure 6,B). The chevrons commonly found in
this genus were not observed.

Parapodia of the first segment are simple, cirrus-
like lobes without setae. By the middle of the body, they
contain setae, dorsal and ventral cirri, and a long, median
ligule (figure 6,C). Above the dorsal cirrus, there are
two simple, stout hooks (figure 6,n). The compound setae
consist of a few spinlgers and falclgers (figure 6,E,F).

Specimens were collected at 25 stations, in all areas
of the Estuary except Hillsborough Bay. Twenty of these
stations, however, were in lower Tampa Bay. Apparently
this species is limited to water that has an average salin-
ity of over 20 parts per thousand, and it is most commonly
found where salinity is at least 30 parts per thousand
(table 122).

No collections were made in soft sediments. Average

309
bottom type was poorly sorted, medium sand that was about
one-half shell. Very few large shell particles were pres-
ent and percentages of silt, clay, and organic carbon were
low (table 123).

Only three of the dredge and shovel samples contained
vegetation. Algae were present, but no sea grasses.

No specimens with mature gametes were collected, and
juveniles were noted only in October and November.

310

Table 122. — Goniadella sp. — Locality records and number

of individuals from survey stations, Tampa Bay,
Florida, 1963-69 (D-dredge, S-shovel, N-net)

Old Tampa Bay

Stations

Individuals Stations

Individuals

D S N

D S N

6-2

6 6-3

3

Upper Tampa Bay

13-3

4

Boca Ciega Bay

BC-N

9

Terra Ceia Bay

S-8

1

Lower Tampa Bay

15-21

4

15-22

17

15-23

39

15-24

7

15-25

59

15-26

33

15-27

4

15-29

I

15-31

30

16-12

10

16-13

81

16-14

57

16-15

134

16-16

16

16-17

11

17-2

27

17-3

101

17-4

55

17-5

4

17-6

1

311

Table 123. — Gonladella sp. — Mean and range of observed
environmental factors from survey stations,
Tampa Bay, Florida, 1963-69

Factor

Mean

Range

Number
observations

Water temperature (*C.)

Salinity (%. )

PH

Depth (m.)

Sediment type

Granules (wt. %)

Sands 'wt. %)

Silts (wt. %)

Clay (wt. %)

CaC03 (wt. %)

Organic carbon (wt. %)

Organic nitrogen (wt. %)

Mean grain size,
total sample (0)

Standard deviation,
total sample (0)

Skewness, total sample

Kurtosis, total sample

Mean grain size,
noncarbonate fraction (0)

Standard deviation,
noncarbonate fraction (0)

Mean grain size,
carbonate fraction (0)

Standard deviation,
carbonate fraction (0)

24.3

15.0 to 31.8

24

31.8

24.2 to 34.5

24

8.0

7.7 to 8.2

24

2.3

(\ to 4.0

24

sand

shelly sand
to sand

24

5.0

0.5 to 21.4

20

93.7

77.8 to 99.2

20

1.0

0.0 to 2.7

20

0.3

0.0 to 0.7

20

46.8

7.2 to 85.2

20

0.6

0.03 to 3.3

19

0.04

0.00 to 0.2

19

1.4 0.4 to 1.9 20

1.4 1.0 to 1.7 20

0.1 -0.5 to 0.8 20

3.4 0.1 to 8.2 20

2.9 1.9 to 5.9 20

1.2 0.6 to 3.2 20

0.3 -1.7 to 1.7 17

1.0 0.8 to 1.5 17

312

Family ONUPHIDAE Kinberg, 1865
Worms of this family are tubicolous omnivores that

subsist on planktonlc food and small benthic organisms.

They have world-wide distribution in tropical, temperate,

and boreal seas.

Five species were found in Tampa Bay. Diopatra cuprea

and Onuphis sp. were collected throughout the Estuary.

Onuphis magna and Onuphis nebulosa were found in upper

and lower Tampa Bay, and Onuphis eremlta oculata was found

only in lower Tampa Bay.

Key to ONUPHIDAE Collected in Tampa Bay

1 Branchial filaments arranged in

a spiral Diopatra cuprea

Branchial filaments simple or pectinate 2

2 Branchiae present from the first

setiger Onuphis eremita oculata

Branchiae appear after the first setiger 3

3 Branchiae pectinate with as many as 12

filaments ; size large Onuphis magna

Branchiae with 4 or fewer filaments;

size small 4

4 Ventral cirri slender through 8 segments;

tube covered with shell fragments Onuphis nebulosa

- Ventral cirri slender through 6 segments;

tube covered mostly with sand grains Onuphis sp.

313

Diopatra cuprea (Bosc, 1802)
(Described and illustrated by Pettibone, 1963a)

Individuals were collected in all areas of the Estuary
at 160 survey stations and at incidental localities in
Boca Ciega Bay (4) upper Tampa Bay (1) Old Tampa Bay (3)
and Hillsborough Bay (1). The largest number of specimens
per dredge haul (93) were taken at station 10-22 in Hills-
borough Bay (table 124) .

Average sediment type at dredge and shovel stations
was poorly sorted, fine sand. Shell comprised about nine
percent of the sand size fraction, and a small percentage
of large shell fragments was also recorded. Organic carbon
was less than one percent and silt and clay amounted to
about six percent (table 125).

Over 50 percent of the bottom samples were vegetated
with algae, and one or more of the five sea grasses found
in the Estuary.

A single juvenile specimen was collected in May. No
specimens with mature gametes were observed.

D. cuprea has a world-wide range in temperate and
tropical waters, and is well known throughout the Gulf of
Mexico.

314

Table 124. — Dlopatra cuprea — Locality records and number

of individuals from survey stations, Tampa Bay,
Florida, 1963-69 (D-dredge, S-shovel, N-net)

Old Tampa Bay

Stations

Individuals

Stations

Individuals

A

2

B

15

B-l

2

B-2

23

1-1

9

1-2

4

1-3

3

1-4

2

1-5

3

2-1

7

2-2

1

2-3

13

2-5

5

3-2

6

3-3

9

3-8

1

3-10

3-11

1

3-12

1

10

3-13

4

3-14

4

3-15

2

3-16

3

4-1

1

4-2

6

4-3

1

4-5

6

4-6

■1

4-7

1

4-8

1

5-1-A

1

1

5-3

1

5-4

3

6-1-A

2

6-1-C

4

6-4-A

2

10

6-6

10

6-7-A

18

Hillsborough Bay

C-l

1

8-9

5

C-2

2 5

9-3

3

10

C-3

1

1

9-4

22

C-5

10

10-15

11

10

C-6

31

10

10-16

6

C-7

3

10-17

10

C-8

2

10-19

8

10

C-8-1

1

10-20

8

C-8- 2

1

10-22

93

5

7-3

1

10-23

38

10

315

Table 124. — Diopatra cuprea — Locality records and number

of individuals from survey stations, Tampa Bay,
Florida, 1963-69 (D-dredge, S-shovel, N-net)-
( continued)

Upper Tampa Bay

Stations

Individuals Stations

Individuals

D S N

D S N

10-1-A

12

10-4

1

10-5

5

10-7

1

10-10

3

10-11

12

10-12

6

10-13

14

10-14-A

21

18

11-25

10

11-26

10

11-27

10

11-28

1

11-28-1

26

12-1

3

12-16

10

13-1-A

10

13-2

10

13-10

10

13-11

1

10

13-12

10

13-13

10

Boca Ciega Bay

BC-A

9

10

BC-A-1

10

BC-C

10

BC-E

7

1

BC-G

5

BC-H

2

BC-I

1

1

BC-M

1C

1

4

BC-N

27

1

D-l

1

D-2

3

1

0-5

1

D-6

5

D-9

1

D-10

1

D-ll

1

13

D-13

10

D-14

1

D-15

1

D-l 7

1

D-19-A

1

10

D-21

10

D-22

2

10

D-23

12

10

D-25

25

1

PB-1

4

2

PB-4

25

4

4

PB-5

9

10

14-1-A

8

14-2

20

10

14-3

2

14-4

2

10

15-1

2

2

15-3

3

4

10

15-4

13

10

15-8

10

15-10

2

15-11

4

6

15-13

1

4

15-14

1

1

15-15

4

1

15-16

4

1

15-17

13

16-1

3

16-2

1

10

16-3

1

16-4

1

16-5

2

16-7

1

16-8

1

316

Table 124. — Dlopatra cuprea — Locality records and number

of individuals from survey stations, Tampa Bay,
Florida, 1963-69 (D-dredge, 5-shovel, N-net)-
( continued)

Terra

Cela

Bay

Stations

Inc

lividuals

Stations

Individuals

D

3

N

D S N

E-l
E-2
E-6

7
3

14

1

10

E-7

E-8

27
3

Lower

Tampa

Bay

14-5

14-7

1

14-10

1

14-11

1

14-12

1

14-13

1

15-19

15-20

12

15-31

3

15-32

1

16-9

1

16-9-A

1

16-9-B

2

10

10

10

16-10

8

16-11

2

16-21

16-25

2

16-26

25

16-27

1

17-6

1

17-7

2

17-8

1

17-9

2

17-10

17-13

1

10

10

10

317

Table 125. — Diopatra cuprea — Mean and range of observed
environmental factors from survey stations,
Tampa Bay, Florida, 1963-69

Factor

Mean

Range

Number
observations

Water temperature CC.)

Salinity (.%,)

PH

Depth (m.)

Sediment type

Granules (wt. %)

Sands (wt. %)

Silts (wt. %)

Clay (wt. %)

CaCOj (wt. %)

Organic carbon (wt. %)

Organic nitrogen (wt. %)

Mean grain size,
total sample (0)

Standard deviation,
total sample (0)

Skewness, total sample

Kurtosis, total sample

Mean grain size,
noncarbonate fraction (0)

Standard deviation,
noncarbonate fraction (0)

Mean grain size,
carbonate fraction (0)

Standard deviation,
carbonate fraction (0)

25.5

12.8 to 33.2

147

27.1

0.7 to 35.1

147

7.9

7.0 to 8.5

126

0.8

/l to 3.3

147

sand

shelly sand to
clayey silt

144

2.4

0.0 to 79.6

144

91.3

11.2 to 100

144

3.7

0.0 to 44.4

144

2.4

0.0 to 65.9

144

8.6

0.6 to 95.0

143

0.8

0.02 to 6.9

86

0.04

O.'OO to 0.2

86

2.6 -4.0 to 7.1 143

1.3 0.5 to 2.8 143
0.5 -1.7 to 2.1 143

10.8 -1.3 to 43.4 142

3.1 1.4 to 8.7 134

1.4 0.4 to 2.8 134
-0.2 -2.6 to 3.0 122

1.3 0.2 to 3.1 122

318

Onuphis ereroita oculata Hartnian, 1951

Specimens were commonly collected outside the Estuary
along barrier island beaches, but only at a single station
(17-10) within the Estuary (table 126). This species is
apparently well adapted to wave action and turbulence, and
requires water of high salinity.

The worm was found in poorly sorted, fine sand that
contained a moderate amount of shell, and only traces of
silt, clay, and organic carbon (table 127).

There was no bottom vegetation at the collection site
in lower Tampa Bay.

Neither gravid nor juvenile specimens were collected.

O. e. oculata has been reported only from the Gulf of
Mexico.

319

Table 126. — Onuphls eremlta oculata — Locality records and
number of individuals from survey stations,
Tampa Bay, Florida, 1963-69 (D-dredge, S-shovel,
N-net)

Lower Tampa Bay

Stations

Individuals Stations

Individuals

D S N

D S N

17-10

1

320

Table 127. — Onuphis eremlta oculata — Mean and range of
observed environmental factors from survey
stations, Tampa Bay, Florida, 1963-69

Factor

Mean

Range

Number
observations

Water temperature (*C.) 19.0

Salinity (%.) 30.8

pH 8.0

Depth (m.) 1.0

Sediment type sand

Granules (wt. %) 3.6

Sands (wt. %) 95.8

Silts (wt. %) 0.5

Clay (wt. %) 0.1

CaC03 (wt. %) 10.0

Organic carbon (wt. %) 0.1

Organic nitrogen (wt. %) 0.01

Mean grain size,

total sample (0) 2.4

Standard deviation,

total sample (0) 1.0

Skewness, total sample -1.3

Kurtosis, total sample 14.5

Mean grain size,

noncarbonate fraction (0) 2.4

Standard deviation,

noncarbonate fraction (0) 0.6

Mean grain size,

carbonate fraction (0) --

Standard deviation,

carbonate fraction (0) —

321

Onuphis magna (Andrews, 1891)
(Described and illustrated by Treadwell, 1921)

Specimens were taken at 18 survey stations between
transect-12 (upper Tampa Bay) and the Gulf. Three inci-
dental collections were made in Boca Clega Bay and one in
lower Tampa Bay (table 128).

Sediment at dredge and shovel stations was poorly
sorted, medium sand with a moderate amount of shell in
sand and granule particle size classes. The percentage
of silt and clay was under two, and organic carbon was
less than one percent (table 129).

Algae were present at eight of 19 dredge and shovel
stations, and generally occurred with manatee, turtle, or
shoal grass.

Neither gravid nor juvenile specimens were collected.

0. magna has been recorded along the Atlantic sea-
board from North Carolina to the Caribbean and the Gulf
of Mexico. It has also been found in tropical waters of
the eastern Pacific.

322

Table 128. — Onuphls magna — Locality records and number of
individuals from survey stations, Tampa Bay,
Florida, 1963-69 (D-dredge, S-shovel, N-net)

Upper Tampa Bay

Stations

Individuals Stations

Individuals

D S

N

D S N

12-9

1

Boca Ciega Bay

BC-C

BC-N
D-25

11

4

15-16
16-6

1

2

1

Lower Tampa Bay

D-27

14-11

1

15-20

1

15-21

1

15-23

1

15-26

1

15-29

1

15-33

1

16-9-A

1

16-9-B

2

17-1

1

17-2

1

323

Table 129. — Onuphls magna — Mean and range of observed

environmental factors from survey stations,
Tampa Bay, Florida, 1963-69

Factor

Mean

Ranc

18

Number
observations

Water tempera*

ture

CC.

)

23.1

16.2

to

29.4

19

Salinity (%.)

31.9

27.1

to

35.1

19

PH

8.0

7.7

to

8.3

17

Depth (m.)

1.4

D-

to

4.0

19

Sediment type

sand

—

16

Granules (wt.

%)

3.4

0.0

to

14.2

16

Sands (wt. %)

95.7

83.5

to

99.8

16

Silts (wt. %)

1.1

0.0

to

4.1

16

Clay (wt. %)

0.3

0.0

to

0.8

16

CaCO, (wt. %)

18.8

1.9

to

49.5

16

Organic carbon (wt. %)

0.7

0.0;

1 tc

2.3

15

Organic nitroc

jen (

wt.

%)

0.03

0.01

. to

0.1

15

Mean grain size,
total sample (0)

Standard deviation,
total sample (0)

Skewness, total sample

Kurtosis, total sample

Mean grain size,
noncarbonate fraction (0)

Standard deviation,
noncarbonate fraction (0)

Mean grain size,
carbonate fraction (0)

Standard deviation,
carbonate fraction (0)

2.0 1.2 to 2.8 16

1.2 0.5 to 1.9 16

0.1 -1.1 to 1.1 16

8.1 0.4 to 22.2 15

3.4 1.9 to 7.1 15

1.6 0.6 to 3.4 15

0.5 -0.56 to 2.5 14

1.0 0.2 to 1.4 14

324

Onuphls nebulosa Moore, 1911
(Described and illustrated by Hartman, 1968)

Individuals were collected at a total of 89 survey
stations in all areas of the Estuary except Old Tampa and
Hillsborough Bays. One incidental collection was made in
lower Tampa Bay near Mullet Key (table 130). Dredge hauls
containing more than 100 worms were taken in upper and
lower Tampa Bay, and the greatest number in any one col-
lection (420) were taken at station 12-12.

Sediment data show that this species is generally
found in poorly sorted, fine sand that contains a consider-
able amount of shell in the sand and granule size classes.
Silt and clay content was less than three percent, and
organic carbon was under one percent (table 131).

One-half of the dredge and shovel samples contained
algae, and in addition, some had manatee, turtle, or shoal
grass.

Neither gravid nor juvenile specimens were collected.

O. nebulosa has been reported in the Gulf of Mexico
and in the eastern Pacific from central California to
Panama.

325

Table 130. — Onuphis nebulosa — Locality records and number

of individuals from survey stations, Tampa Bay,
Florida, 1963-69 (D-dredge, S-shovel, N-net)

Upper Tampa Bay

Stations

Individuals Stations

Individuals

D S N

D S N

11-15

1

12-13

11-16

13

2

12-14

47

11-17

1

12-15

328

11-20

1

12-16

10

12-2

1

13-3

5

12-3

182

1

13-4

134

12-6

2

1

13-5

240

12-7

12

1

13-6

111

12-8

43

1

13-7

140

12-9

58

13-8

309

12-10

49

13-9

15

12-11

43

13-10

59

12-12

420

1

13-13

Boca Ciega Bay

BC-A

12

PB-5

2 3

BC-A-1

20

15-3

1

BC-E

1

15-6

2

BC-N

70

15-9

D-3

3

15-11

2

D-23

4

1

15-12

22

D-24

1

15-14

D-25

6

16-1

PB-1

3

16-6

55

PB-4

1

Terra Ceia Bay

E-8

716

326

Table 130. — Onuphls nebulosa — Locality records and number

of individuals from survey stations, Tampa Bay,
Florida, 1963-69 (D-dredge, S-shovel, N-net)-
(continued)

Lower Tampa

Bay

Stations

Individuals

Stations

Individuals

D

S

N

D

S

N

14-

-10

50

16-

-10

1

14-

-11

100

16-

-13

89

14-

-12

62

16-

-14

1

14-

-14

39

16-

-15

9

14-

-15

8

16-

-16

4

1

15-

-18

20

16-

-17

6

1

15-

-19

1

16-

-18

1

15-

-20

9

16-

-22

4

15-

-21

55

16-

-25

385

4

15-

-22

32

16-

-26

1

15-

■23

7

16-

-27

363

1

15-

-2 4

61

17-

-2

931

1

15-

-2 5

1

17-

-3

12

15-

-26

40

1

17-

-4

10

15-

-27

17

1

17-

-5

53

15-

-28

64

1

17-

-6

21

15-

-29

54

17-

-7

24

15-

-30

65

17-

-8

10

15-

-31

250

17-

-11

1

15-

-32

47

18-

-3

25

15-

-33

1

18-

-4

4

16-

-9-B

2

327

Table 131. — Onuphls nebulosa — Mean and range of observed
environmental factors from survey stations,
Tampa Bay, Florida, 1963-69

Factor

Mean

Ranqe

ob

Number
servations

Water temperature (

"C.

)

21.4

12.8 to 29.3

86

Salinity (%„)

30.6

22.3 to 35.1

85

pH

8.0

7.6 to 8.4

86

Depth (m.)

1.6

£1 to 4.0

86

Sediment type

sand

shelly sand to
silty sand

81

Granules (wt.

%)

3.6

0.0 to 41.5

81

Sands (wt. %)

93.5

72.5 to 99.9

81

Silts (wt. %)

2.1

0.0 to 22.1

81

Clay (wt. %)

0.7

0."0 to 7.2

81

CaC03 (wt. %)

24.3

1.2 to 85.2

81

Organic carbon

(wt.

%)

0.6

0.03 to 5.0

73

Organic nitrog

en (w

t.

%)

0.03

0.00 to 0.2

73

Mean grain size,

total sample (0) 2.1 0.4 to 7.6 81

Standard deviation,
total sample (0)

Skewness, total sample

Kurtosis, total sample

Mean grain size,
noncarbonate fraction (0)

Standard deviation,
noncarbonate fraction (0)

Mean grain size,
carbonate fraction (0)

Standard deviation,
carbonate fraction (0)

1.3

0.5

to

3.5

81

0.1

-1.7

to

1.3

81

6.3

-0.4

to

24.4

30

2.9

1.7

to

7.1

75

1.3

0.5

to

3.4

75

0.3

-2.0

to

2.2

61

1.2

0.2

to

2.9

61

328

Onuphls sp.

This species resembles Onuphis nebulosa (figure 6,G)
but constructs a sand-covered, rather than a shell-covered
tube. There are also differences in the arrangement of
branchiae, ventral cirri, and setae.

The first setiger has dorsal and ventral cirri (figure
6,H) and branchiae do not appear until setiger eight (figure
6,K). The ventral cirri are slender on the first six seti-
gers, and are short and rounded thereafter. Hooded hooks
are present on all setigers. On the first, they have an
incomplete joint and trldentate tip (figure 6,1). On the
third setiger the joint is not apparent and the teeth are
blunt and less curved (figure 6, J). By setiger 16 the setal
hooks are stout and bidentate with a greatly reduced termi-
nal tooth (figure 6,L).

This species was collected at a total of 99 survey
stations in all areas of the Estuary and at incidental
localities in Old Tampa Bay (2) upper Tampa Bay (1) Boca
Ciega Bay (3) and lower Tampa Bay (1). The greatest number
in a single dredge haul (424) were collected at station
PB-4 in Boca Ciega Bay (table 132).

Average sediment at dredge and shovel stations was
poorly sorted, fine sand with more than 10 percent shell

329
in sand and coarser particle classes. Silt and clay con-
tent was less than five percent and organic carbon was
nearly one percent (table 133).

Slightly more than one-third of these stations con-
tained algae and one or more of the five sea grasses found
in the Estuary.

Young specimens were observed adhering to the interior
of adult's tubes in August and November.

330

Table 132. — Onuphls sp. — Locality records and number of
individuals from survey stations, Tampa Bay,
Florida, 1963-69 (D-dredge, S-shovel, N-net)

Old Tampa Bay

Stations

Individuals

Stations

Individuals

2-1

4-19

5

5-3

1

5-6

1

5-8

1

5-13

3

6-1-A

6-1-C

31

6-1-D

4

6-2

22

6-3

5

6-4-A

1

6-7-A

19

6-1-A

1

Hillsborough Bay

9-4
10-16

1
8

10-19

3

Upper Tampa Bay

10-0

1

10-1-A

213

10-3

25

10-4

106

10-6

1

10-12

36

10-13

58

10-14-A

16

51

11-1

88

11-2

17

11-3

10

10

11-4

6

10

11-5

1

11-28-1

168

11-28-2

3

12-1

104

13-1-A

1

13-1-B

150

13-3

3 5

331

Table 132. — Onuphis sp. — Locality records and number of
individuals from survey stations, Tampa Bay,
Florida, 1963-69 (D-dredge, S-shovel, N-net)-
( continued)

Boca Ciega Bay •>

Stations

Individuals Stations

Individuals

D S N

D S N

BC-A

4

BC-A-1

BC-C

26

BC-E

1

BC-G

8

BC-I

1

BC-M

31

BC-N

100

D-l

1

D-2

93

D-3

60

D-6

201

D-7

D-9

2

D-ll

76

D-15

D-17

16

D-19-A

D-23

248

D-25

86

2

PB-1

7

34

PB-4

424

3

PB-5

52

14-2

1

14-3

20

1

14-4

15

15-2

129

15-3

29

15-4

4

15-8

5

15-15

25

15-16

25

15-17

1

1

16-1

17

1

16-2

13

16-4

1

6

16-7

49

16-8

35

Terra Ceia Bay

E-l
E-2
E-4

10
35

10

E-5
E-6
E-7

332

Table 132. — Onuphls sp. — Locality records and number of
individuals from survey stations, Tampa Bay,
Florida, 1963-69 (D-dredge, S-shovel, N-net)-
( continued)

Lower Tampa Bay

Stations

Individuals Stations

Individuals

D S N

D S N

D-2 7

1

14-5

106

14-6

9

16-9

10

16-9-A

194

16-20

1

16-21

2

16-23

8

16-25

113

16-26

4

17-1
17-2
17-3
17-4
17-5
17-6
17-7
17-8
17-9
17-14

4
1
6

17
23
22
17
1
3

333

Table 133. — Onuphls sp. — Mean and range of observed

environmental factors from survey stations,
Tampa Bay, Florida, 1963-69

Number
Factor Mean Range observations

Water temperature (*C.)

Salinity (%.)

PH

Depth (m. )

Sediment type

Granules (wt. %)

Sands (wt. %)

Silts (wt. %)

Clay (wt. %)

CaC03 (wt. %)

Organic carbon (wt. %)

Organic nitrogen (wt. %)

Mean grain size,

total sample (0) 2.5 0.4 to 7.1 102

Standard deviation,
total sample (0)

Skewness, total sample

Kurtosis, total sample

Mean grain size,
noncarbonate fraction (0)

Standard deviation,
noncarbonate fraction (0)

Mean grain size,
carbonate fraction (0)

Standard deviation,
carbonate fraction (0)

24.0

13.0 to 33.2

104

29.2

18.5 to 35.1

104

8.1

7.6 to 8.5

100

0.9

£1 to 4.0

104

sand

shelly sand to
sandy clay

103

2.4

0.r0 to 21.5

103

93.4

24.5 to 99.9

103

2.7

0.0 to 22.7

103

1.4

0.0 to 65.9

103

12.5

0.6 to 85.2

102

0.9

0.01 to 8.5

72

0.1

0.00 to 0.3

72

1.2

0.5

to

2.7

102

0.3

-1.7

to

2.4

102

11.9

-0.6

to

61.8

101

3.2

1.4

to

9.0

95

1.3

0.4

to

3.2

94

-0.01

-2.5

to

2.5

80

1.2

0.2

to

2.6

80

Figure 6. — Diagnostic features of Goniadella sp. and
Onuphis sp.

Goniadella sp. : (A) Head and first parapodial segment;
(B) Pharyngeal papilla; (C) Parapod
from median section; (D) Hooked seta
from body wall adjacent to dorsal cirrus;
(E) Compound spiniger from median
parapod (F) Compound falciger from
median parapod

Onuphis sp.: (G) Anterior end; (H) First setigerous
segment; (1) Hooded hook from first
segment (J) Hooded hook from third
segment (K) Eighth parapod (L) Setae
from sixteenth segment.

335

FIGURE 6

336

Family EUNICIDAE Savigny, 1818
A predominantly tropical family, the eunlcids are

active omnlvores that are generally associated with shell

and coral bottoms.

Three species were collected in Tampa Bay. Marphysa

sanguinea was found in all areas of the Estuary, while the

other two, Eunice rubra and Nematonerels hebes, were taken

only in Boca ciega Bay and lower Tampa Bay.

Key to EUNICIDAE Collected in Tampa Bay

1 Branchiae present 2

- Branchiae absent Nematonereis hebes

2 Tentacular cirri present Eunice rubra

- Tentacular cirri absent Marphysa sanguinea

Eunice rubra Grube, 1856
(Described and illustrated by Treadwell, 1921)

Specimens were collected at two stations in Boca Ciega
Bay, and at five in lower Tampa Bay. All were taken by
net (table 134).

No data are available for sediments or vegetation at
these localities.

A gravid specimen was collected in January and juve-
niles were found in October.

337

E. rubra has been recorded in the Gulf of Mexico
and Caribbean as well as along the south Atlantic and
Pacific coasts.

338

Table 134. — Eunice rubra — Locality records and number of
individuals from survey stations, Tampa Bay,
Florida, 1963-69 (D-dredge, S-shovel, N-net)

Boca Ciega Bay

Stations

Indi

.v:

Lduals Stations

Individuals

0

s

N

D S N

D-25

1 16-8

1

Lower Tampa Bay

14-13
16-14
16-20

1 17-5
1 18-3

1

1
2

339

Marphysa sanguinea (Montagu, 1815)
(Described and illustrated by Pettibone, 1963a)

This was the only eunicld found throughout the Es-
tuary. Collections came from a total of 39 survey sta-
tions, and incidental localities in Old Tampa Bay (3)
Hillsborough Bay (1) Boca Ciega Bay (8) and lower Tampa
Bay (1). The largest collections were made by shovel in
shallow water on grass flats or shelly bottom (table 135).

Sediments at dredge and shovel stations were poorly
sorted, fine sand. Shell accounted for more than 13 per-
cent of the sediment in sand and granule particle size
categories. Silt and clay content was less than five
percent and organic carbon was slightly more than one per-
cent (table 136).

About two-thirds of the bottom samples contained
algae as well as shoal, turtle, or manatee grass.

No specimens with mature gametes were collected,
however, juveniles were found in May, July, August, Sep-
tember, October, November, and December.

M. sanguinea has been reported in the Gulf of Mexico
and may be regarded as a cosmopolitan species that occurs
in temperate and tropical seas.

340

Table 135. — Marphysa sanquinea — Locality records and number
of individuals from survey stations, Tampa Bay,
Florida, 1963-69 (D-dredge, S-shovel, N-net)

Old Tampa Bay

3-1-A 37

10

PB-5

1

15-3

10

15-5

10

15-8

1

16-2

1

16-3

3

16-5

3

16-8

1

Stations Individuals Stations Individuals

A-l 7 3-15 3

A-3 13 4-1 1

A-6 1 6-1-D 3

2-4 1 6-2 1

Hillsborough Bay

C

C-l

8 C-2
1

2

Upper Tampa Bay

13-1-A

3

Boca Ciega Bay

BC-C

BC-M

D-2

D-3

D-6 1 16-2 9 2

D-22 1 16-3 5 6

D-23 3 16-5 1

D-25 3 16-8 8

PB-1

Terra Ceia Bay

E-l 2 E-6

E-4 1

341

Table 135. — Marphysa sanqulnea — Locality records and number
of individuals from survey stations, Tampa Bay,
Florida, 1963-69 (D-dredge, S-shovel, N-net)-
( continued)

Lower

Tampa

Bay

Stations

Individuals

Stations

Individuals

D S N

D

S N

15-25
15-26
15-31

1

1
1

16-9-B

17-2

18-3

2

1

3

342

Table 136. — Marphysa sangulnea — Mean and range of observed
environmental factors from survey stations,
Tampa Bay, Florida, 1963-69

Number
Factor Mean Range observations

Water temperature (*C»)

Salinity (%.)

PH

Depth (m. )

Sediment type

Granules (wt. %)

Sands (wt. %)

Silts (wt. %)

Clay (wt. %)

CaCO, (wt. %)

Organic carbon (wt. %)

Organic nitrogen (wt. %)

Mean grain size,

total sample (0) 2.4 0.6 to 3.4 33

Standard deviation,
total sample (0)

Skewness, total sample

Kurtosis, total sample

Mean grain size,
noncarbonate fraction (0)

Standard deviation,
noncarbonate fraction (0)

Mean grain size,
carbonate fraction (0)

Standard deviation,
carbonate fraction (0)

25.0

13.0 to 32.7

33

28.8

18.3 to 34.5

33

8.0

6.7 to 8.4

28

0.8

l_\ to 4.0

33

sand

shelly sand to
silty sand

33

4.1

0.0 to 34.5

33

91.5

58.0 to 99.4

33

3.1

0.0 to 11.9

33

1.2

0.0 to 9.1

33

13.5

0.7 to 66.0

3 3

1.1

0.1 to 6.9

22

0.1

0.00 to 0.2

22

1.4

0.6

to

3.8

33

0.5

-1.2

to

3.4

33

10.9

-0.7

tc

73.5

33

3.3

1.9

to

8.7

33

1.5

0.6

to

3.2

33

0.1

-1.7

to

2.3

31

1.3

0.4

to

2.8

31

343

Nematonereis hebes Verrill, 1900
(Described and illustrated by Treadwell, 1921)

This minute and rarely collected worm was found at
one station in Boca Ciega Bay, and at seven in lower
Tampa Bay. Collections that contained 10 or more speci-
mens per dredge haul were made along transect-15 and 16
(table 137).

The worm was found only in sand or shelly sand which
was mostly of medium size and poorly sorted. Silt and clay
content was very low, but organic carbon was greater than
one percent. A moderate amount of granular shell was pres-
ent, and a large percentage of the sand size particle class
was composed of shell (table 138).

Of the two stations where vegetation was recorded, one
had algae and the other had algae, shoal grass, and turtle
grass.

Neither gravid nor juvenile specimens were collected.

N. hebes was originally described from Bermuda, which
was the only known locality prior to collections recorded
here for Tampa Bay.

344

Table 137. — Nematonereis hebes — Locality records and number
of individuals from survey stations, Tampa Bay,
Florida, 1963-69 (D-dredge, S-shovel, N-net)

Boca Ciega Bay

Stations

Individuals Stations

Individuals

D S N

D S N

D-25

3

Lower Tampa Bay

15-23

4

15-25

13

16-13

12

16-14

10

17-5 1
17-8 2
18-3 2

345

Table 138. — Nematonerels hebes — Mean and range of observed
environmental factors from survey stations,
Tampa Bay, Florida, 1963-69

Factor

Mean

Range

Number
observations

Water temperature (#C.) 22.5

Salinity (%.) 33.0

PH 8.1

Depth (m.) 2.4

Sediment type sand

Granules (wt. %) 8.4

Sands (wt. %) 89.9

Silts (wt. %) 9.3

Clay (wt. %) 0.3

CaC03 (wt. %) 38.8

Organic carbon (wt. %) 1.1

Organic nitrogen (wt. %) 0.1

Mean grain size,
total sample (0)

Standard deviation,
total sample (0)

Skewness, total sample

Kurtosis, total sample

Mean grain size,

noncarbonate fraction (0) 3.4

Standard deviation,
noncarbonate fraction (0) 1.2

Mean grain size,

carbonate fraction (0) 0.2

Standard deviation,

carbonate fraction (0) 1.0

17.4 to 25

31.5 to 33.9
7.9 to 8.4

/l to 3.0

shelly sand
to sand

4.2 to 20.8

77.4 to 93.5

0.3 to 2.4

0.1 to 0.9

13.2 to 68.0

0.1 to 3.3

0.01 to 0.2

1.4 0.6 to 2.1

1.6 1.3 to 2.0

-0.01 -0.6 to 0.02

2.0 -0.03 to 4.2

2.4 to 5.9

0.6 to 2.1

-1.3 to 0.9

0.9 to 1.3

8
8
8

8
8
8

8
8

346

Family LUMBRINERIDAE Malmqren, 1867
The lumbrinerlds are burrowing worms that are common-
ly found in unconsolidated sediments of all seas. Day (1967)
considered the group as carnivorous scavengers and pre-
dators .

Six species were found in Tampa Bay. None were col-
lected in Hillsborough Bay, and only one, Lumbrlneris
latrellli, was found in Old Tampa Bay, where it was collect-
ed no farther north than transect-6. Lumbrlneris cocclnea
was collected as far into the Estuary as upper Tampa Bay,
and the other four, Lumbrineris bassi, Lumbrlneris erecta.
Lumbrineris impatiens, and Lumbrineris sp. were found only
in more saline waters seaward of transect-13.
Key to LUMBRINERIDAE Collected in Tampa Bay

1 Compound, hooded hooks present in anterior

parapodia 2

- Compound, hooded hooks absent in anterior

parapodia 3

2 Prostomlum conical; compound, hooded hooks

have a long distal appendage ..... Lumbrineris latrellli

Prostomium rounded; compound, hooded hooks

have a short, distal appendage . Lumbrineris coccinea

3 Simple, hooded hooks present before setiger 10 4

- Simple, hooded hooks present after setiger 10 5

347

4 Simple, hooded hooks present by setiger 5;
terminal teeth small, forming a crest above a
single, large, blunt, basal tooth; anterior,
median, and posterior hooks

similar Lumbrineris impatiens

Simple, hooded hooks present before setiger 5;
terminal teeth directed laterally, not forming
a crest; hooks of median and posterior setigers
short and stout with the lower 3 teeth greatly
enlarged Lumbrineris sp.

5 Simple, hooded hooks present from about setiger

16 , basal tooth large Lumbrineris bassi

Simple, hooded hooks present from about setiger

30, all terminal teeth small and

similar Lumbrineris erecta

Lumbrineris bassi Hartman, 1944a

Specimens were collected at a total of seven survey
stations in Boca Ciega Bay and lower Tampa Bay, and at two
incidental stations in Boca Ciega Bay, and one in lower
Tampa Bay (table 139).

Sediments at survey stations were entirely sand that
was fine and poorly sorted. Average shell content was over
12 percent, silt and clay was under five percent, but organic
carbon was nearly two percent (table 140).

Vegetation occurred at over 50 percent of the dredge
and shovel stations. Four had algae, together with shoal
grass, manatee grass, or turtle grass.

No gravid or juvenile specimens were collected.

348

L. bassl has been recorded in the Gulf and is other-
wise known only from southern California.

349

Table 139. — Lumbrineris bassl — Locality records and number
of individuals from survey stations, Tampa Bay,
Florida, 1963-69 (D-dredge, S-shovel, N-net)

Boca Clega Bay

Stations

Individuals Stations

Individuals

D

S

N

D S N

D-6

D-23

2

28

D-25

2

Lower Tampa Bay

14-13
16-10

1

1

16-22
16-24

1
1

350

Table 140. — Lumbrineris bassl — Mean and range of observed
environmental factors from survey stations,
Tampa Bay, Florida, 1963-69

Factor

Water temperature CO

Salinity (%. )

PH

Depth (m.)

Sediment type

Granules (wt. %)

Sands (wt. %)

Silts (wt. %)

Clay (wt. %)

CaC03 (wt. %)

Organic carbon (wt. %)

Organic nitrogen (wt. %)

Mean grain size,

total sample (0) 2.7 2.3 to 3.4

Standard deviation,

total sample (0) 1.2 0.8 to 1.8 6

Skewness, total sample 0.3 -0.4 to 1.5 6

Kurtosis, total sample 10.0 2.4 to 14.0 6

Mean grain size,

noncarbonate fraction (0) 2.8 1.9 to 4.4 6

Number

Mean

Ranc

ie

observations

24.0

18.1

to

27.8

7

32.3

30.8

to

34.0

7

8.1

7.8

to

8.3

7

1.0

Zi

to

3.0

7

sand

—

7

2.1

0.1

to

5.2

7

94.3

89.9

to

99.2

7

2.8

0.2

to

4.3

7

0.6

0.1

to

1.3

7

12.9

3.6

to

43.3

7

1.7

0.1

to

6.9

6

0.04

0.00 tc

i 0.2

6

Standard deviation,

noncarbonate fraction (0) 1.4 1.1 to 1.9 6

Mean grain size,
carbonate fraction (0)

Standard deviation,
carbonate fraction (0)

1.2

0.8

to

1.8

0.3

-0.4

to

1.5

10.0

2.4

to

14.0

2.8

1.9

to

4.4

1.4

1.1

to

1.9

0.1

-0.7

to

1.0

1.2

0.8

to

1.7

351

Lumbrineris cocclnea (Renler, 1804)
(Described and illustrated by Pettlbone, 1963a)

A total of eight collections were made at survey
stations in all areas of the Estuary between upper Tampa
Bay and lower Tampa Bay (table 141).

At the five, dredge stations, sediments were poorly
sorted, medium sand with shell comprising about 24 per-
cent of the sand and granule particle classes. Silt and
clay were only two percent and organic carbon was less
than one percent (table 142).

Algae were present in two bottom samples, but no sea
grass was noted.

No juveniles, and no individuals with mature gametes
were collected.

L. coccinea has been recorded in the Gulf of Mexico
as well as in temperate and tropical waters in the eastern
and western Atlantic and Pacific.

352

Table 141. — Lumbrineris cocclnea — Locality records and
number of individuals from survey stations,
Tampa Bay, Florida, 1963-69 (D-dredge, S-
shovel, N-net)

Upper Tampa Bay

Stations

Individuals Stations

Individuals

D

S N

D S N

11-4

1 12-13

2

Boca Ciega Bay

BC-N

2

D-17

2

Terra Ceia Bay

E-4

2

Lower Tampa Bay

15-25
16-2 7

1

24

17-2

1

353

Table 142. — Lumbrlneris cocclnea — Mean and range of ob-
served environmental factors from survey
stations, Tampa Bay, Florida, 1963-69

Factor

Number

Mean

Ranc

ie ob

servations

20.4

14.5

to

25.2

5

32.1

30.3

to

34.8

5

8.1

8.0

to

8.3

5

1.7

n

to

3.0

5

sand

—

5

5.0

0.8

to

14.7

5

93.1

83.5

to

98.9

5

1.6

0.3

to

3.7

5

0.4

0.1

to

0.7

5

24.1

6.1

to

52.3

5

0.2

0.2

to

0.4

5

0.02

0.02 to 0.04

5

Water temperature (*C.)
Salinity (%.)

PH

Depth (m.)

Sediment type

Granules (wt. %)

Sands (wt. %)

Silts (wt. %)

Clay (wt. %)

CaC03 (wt. %)

Organic carbon (wt. %)

Organic nitrogen (wt. %)

Mean grain size,
total sample (0)

Standard deviation,
total sample (0)

Skewness, total sample

Kurtosis, total sample

Mean grain size,
noncarbonate fraction (0)

Standard deviation,
noncarbonate fraction (0)

Mean grain size,
carbonate fraction (0)

Standard deviation,
carbonate fraction (0)

1.9

2.6

1.0

-0.5

1.0

1.3 to 2.8

1.4 0.9 to 1.9
0.03 -0.3 to 0.3
4.2 0.4 to 9.0

2.1 to 3.1

0.7 to 1.5

-1.7 to 1.5

0.2 to 1.4

354

Lumbrlneris erecta (Moore, 1904)
(Described and illustrated by Hartman, 1968)

A total of 29 collections were made at survey sta-
tions in Boca Ciega Bay and lower Tampa Bay, and one
incidental collection came from lower Tampa Bay (table
143).

Average sediment type at dredge and shovel stations
was poorly sorted, fine sand. Shell amounted to over 20
percent of the sand and granule size particles, silt and
clay were under three percent and organic carbon was less
than one percent (table 144) .

Algae were recorded in one-third of the bottom
samples, and many also had shoal grass, manatee grass,
or turtle grass.

A gravid specimen was collected in November, and
juvenile worms were found in May, October, and November.

L. erecta has never before been reported from the
Gulf of Mexico, and was previously known only from south-
ern California.

355

Table 143. — Lumbrineris erecta — Locality records and number

of individuals from survey stations, Tampa Bay,
Florida, 1963-69 (D-dredge, S-shovel, N-net)

Boca Ciega Bay

Stations

Individuals Stations

Individuals

D S N

D S N

BC-N
D-25
15-10
15-14

15-15

16-3

16-6

Lower Tampa Bay

14-9

3

14-10

2

14-13

1

15-22

1

16-10

9

16-11

2

16-13

1

16-15

1

16-20

6

16-22

1

16-23

5

17-1

17-2

5

17-5

3

17-6

9

17-7

3

17-8

26

17-9

6

17-10

15

17-12

5

18-3

1

18-4

2

356

Table 144. — Lumbrlnerls erecta — Mean and range of observed
environmental factors from survey stations,
Tampa Bay, Florida, 1963-69

Number
Factor Mean Range observations

Water temperature CO 22.6 18.0 to 27.5 29

Salinity (.%.) 32.8 29.9 to 35.1 29

pH 8.0 7.8 to 8.3 29

Depth (m.) 1.7 /l to 4.0 29

Sediment type sand shelly sand 29

to sand

Granules (wt. %) 4.0 0.0 to 20.8 29

Sands (wt. *) 92.9 77.4 to 99.8 29

Silts (wt. %) 2.3 0.2 to 6.6 29

Clay (wt. %) 0.6 0.0 to 2.5 29

CaCO, (wt. %) 20.4 1.4 to 57.4 29

Organic carbon (wt. %) 0.6 0.1 to 3.2 28

Organic nitrogen (wt. %) 0.03 0.00 to 0.2 28

Mean grain size,

total sample (0) 2.3 0.9 to 3.4 29

Standard deviation,

total sample (0) 1.3 0.2 to 2.0 29

Skewness, total sample 0.1 -1.3 to 1.1 29

Kurtosis, total sample 7.6 -0.03 to 19.0 28

Mean grain size,

noncarbonate fraction (0) 2.9 1.4 to 6.1 28

Standard deviation,

noncarbonate fraction (0) 1.3 0.5 to 3.2 28

Mean grain size,

carbonate fraction (0) 0.3 -1.7 to 3.0 21

Standard deviation,

carbonate fraction (0) 1.0 0.1 to 1.5 21

357

Lumbrineris lmpatiens (Claparede, 1868)
(Described and illustrated by Pettibone, 1963a)

Specimens were collected at a single survey station
in Boca Ciega Bay, and at an incidental locality in lower
Tampa Bay near Mullet Key (table 145).

Sediment at the station in Boca Ciega Bay was shelly
sand that contained no silt, and no clay. Particles in
the granule size class accounted for over 29 percent of
the sediment. Data for organic carbon and nitrogen are
not available (table 146).

No vegetation was recorded at the survey station.

No gravid, and no juvenile specimens were collected.

This worm has been recorded in the Gulf of Mexico and
is well known as a cosmopolitan species.

358

Table 145. — Lumbrlnerls impatlens — Locality records and
number of individuals from survey stations,
Tampa Bay, Florida, 1963-69 (D-dredge, S-
shovel, N-net)

Boca Ciega Bay

Stations

Individuals Stations

Individuals

D S N

D S N

15-7

359

Table 146. — Lumbrlnerls Impatiens — Mean and range of ob-
served environmental factors from survey
stations, Tampa Bay, Florida, 1963-69

Factor

Mean

Range

Number
observations

Water temperature (*C.) 29.3

Salinity (%„)

pH

Depth (m.) 0.3

Sediment type Shelly

sand

Granules (wt. %) 29.4

Sands (wt. %) 70.6

Silts (wt. %) 0.0

Clay (wt. %) 0.0

CaC03 (wt. %) 16.1

Organic carbon (wt. %) —

Organic nitrogen (wt. %) —

Mean grain size,

total sample (0) 0.1

Standard deviation,

total sample (0) 1.7

Skewness, total sample 0.1

Kurtosis, total sample -1.0

Mean grain size,

noncarbonate fraction (0) 2.7

Standard deviation,
noncarbonate fraction (0) 0.9

Mean grain size,

carbonate fraction (0) 0.3

Standard deviation,

carbonate fraction (0) 0.8

360

Luinbrlnerls latrellli (Audouin and Milne-Edwards, 1833)
(Described and illustrated by Pettibone, 1963a)

More widely distributed than any other lumbrinerid
found in Tampa Bay, this species was collected in Old
Tampa Bay, upper Tampa Bay, Terra Ceia Bay, and lower
Tampa Bay at a total of 11 survey stations (table 147).

Sediments at dredge stations were mostly poorly sort-
ed, medium sand with less than two percent silt and clay,
and nearly two percent organic carbon. About one-fourth
of the sediment was composed of shell (table 148).

Algae were the only plants noted at the four stations
where vegetation was recorded.

A juvenile worm was collected in October, but no
gravid specimens were observed.

L. latrellli is a cosmopolitan species, and has been
recorded from the Gulf of Mexico.

361

Table 147. — Lumbrineris latrellll — Locality records and
number of individuals from survey stations,
Tampa Bay, Florida, 1963-69 (D-dredge, S-
shovel, N-net)

Old Tampa Bay

Stations

Individuals Stations

Individuals

D S N

D S N

6-2

1

Upper Tampa Bay

11-4

1

Terra Ceia Bay

E-5

4

Lower Tampa Bay

14-15

2

15-22

1

15-26

1

17-2

17-5

3

17-7

3

17-8

1

18-3

10

362

Table 148. — Lumbrinerls labreilli — Mean and range of

observed environmental factors from survey
stations, Tampa Bay, Florida, 1963-69

Factor

Mean

Range

Number
observations

Water temperature (*C.)

Salinity {%.)

pH

Depth (m.)

Sediment type

Granules (wt. %)

Sands (wt. %)

Silts (wt. %)

Clay (wt. %)

CaC03 (wt. %)

Organic carbon (wt. %)

Organic nitrogen (wt. %)

Mean grain size,
total sample (0)

Standard deviation,
total sample (0)

Skewness, total sample

Kurtosis, total sample

Mean grain size,
noncarbonate fraction (0)

Standard deviation,
noncarbonate fraction (0)

Mean grain size,
carbonate fraction (0)

Standard deviation,
carbonate fraction (0)

23.0

14.5

to 31.8

10

30.8

23.8

to 33.8

9

8.1

7.8

to 8.2

10

2.0

1.0

to 3.0

10

sand

shelly sand
to sand

10

5.6

0.2

to 20.8

10

92.7

77.4

to 99.1

10

1.3

0.0

to 2.4

10

0.5

0.0

to 1.5

10

25.5

2.8

to 49.8

10

1.8

0.1

to 8.5

9

0.04

0.0]

. to 0.2

9

1.8

0.9 to 2.6

3.3 2.2 to 9.0

1.1 0.6 to 1.9

0.2 -1.7 to 1.6

1.2 0.9 to 1.6

10

1.4 0.7 to 2.0 10
0.2 -0.6 to 1.7 10
6.1 -0.03 to 25.7 10

10

10

363

Lumbrlnerls sp.

This small lumbrinerld has simple, hooded hooks that
begin on the first parapods and continue on all segments
that follow. In anterior setigers, the hooks have a
straight shaft, long hood, and small teeth (figure 7, A).
In median and posterior setigers, the hooks are short and
stout, the hood covers a shorter portion of the shaft, the
portion of the shaft bearing teeth is reflexed, and the
three basal teeth are greatly enlarged (figure 7,B).

Specimens were collected at a total of 17 survey
stations in Boca Ciega and lower Tampa Bays (table 149).

Average sediment type was poorly sorted, fine sand
that contained little silt and clay, and less than one
percent organic carbon. Shell content was about 13 per-
cent (table 150).

Vegetation occurred at five stations, and consisted
of algae and either manatee or turtle grass.

Neither gravid nor juvenile specimens were collected.

364

Table 149. — Lumbrlnerls sp. — Locality records and number
of individuals from survey stations, Tampa
Bay, Florida, 1963-69 (D-dredge, S-shovel,
N-net)

Boca Ciega Bay

Stations

Individuals Stations

Individuals

D

S

N

D S N

BC-E
PB-5
15-6

1

3
1

16-6
16-7

2

1

Lower Tampa Bay

16-10

2

16-20

7

16-21

33

16-22

29

16-23

30

17-6

23

17-7

4

17-8

112

17-9

26

17-10

28

17-13

1

18-4

2

365

Table 150. — Lumbrineris sp. — Mean and range of observed
environmental factors from survey stations,
Tampa Bay, Florida, 1963-69

Factor

Number

Mean

Ranc

ie

observations

22.2

15.5

to

30.0

18

32.5

30.1

to

34.3

18

8.1

7.8

to

8.5

18

1.3

D-

to

2.3

18

sand

—

18

2.4

0.0

to

8.9

18

94.5

87.8

to

99.8

18

2.2

0.1

tc

5.7

18

0.6

0.0

to

1.3

18

13.3

2.3

to

49.9

18

0.3

0.1

tc

1.0

16

0.02

0.00 to 0.1

16

Water temperature (*C.)
Salinity (%.)

PH

Depth (m.)

Sediment type

Granules (wt. %)

Sands (wt. %)

Silts (wt. %)

Clay (wt. %)

CaC03 (wt. %)

Organic carbon (wt. %)

Organic nitrogen (wt. %)

Mean grain size,
total sample (0)

Standard deviation,
total sample (0)

Skewness, total sample

Kurtosis, total sample

Mean grain size,
noncarbonate fraction (0)

Standard deviation,
noncarbonate fraction (0)

Mean grain size,
carbonate fraction (0)

Standard deviation,
carbonate fraction (0)

2.6

1.7 to 3.2

1.2 0.5 to 2.0

0.0 -1.4 to 1.0

9.4 0.6 to 24.4

2.7 1.4 to 4.4

1.1 0.5 to 2.2
-0.1 -2.0 to 1.0

1.2 0.7 to 2.9

18

18
18
18

16

16

10

10

366

Family ARABELLIDAE Hartman, 1944

The arabellids are carnivorous worms that have world-
wide distribution. Most forms burrow, but some spend part
or all of their life as parasites in other polychaetes.

Five species were found in Tampa Bay. None were found
in Hillsborough Bay, although Arabella iricolor and
Drilonereis magna were collected in water of similar salin-
ity in Old Tampa Bay. These two species were also found in
upper Tampa Bay and all seaward areas of the Estuary.
Drilonereis cylindrica was collected as far into the Es-
tuary as upper Tampa Bay. Drilonereis longa was collected
only in Boca Ciega Bay, and an undetermined arabellid,
Arabella sp., was found only in lower Tampa Bay.
Key to ARABELLIDAE Collected in Tampa Bay

1 Parapodia have no hooded or simple, acicular

setae Arabella iricolor

- Parapodia have hooded, acicular setae .... Arabella sp.

- Parapodia have simple, acicular setae 2

2 First maxillary plates smooth at the

base Drilonereis magna

- First maxillary plates bear teeth at the base 3

3 Maxillary plates symmetrical; maxillary supports
long and slender; parapodial lobes short and

rounded Drilonereis cylindrica

367

- Maxillary plates II, III, and IV asymmetrical;
maxillary support enlarged anteriorly; parapodla
bear enlarged presetal and postsetal lobes on
posterior segments Drilonereis longa

Arabella irlcolor (Montagu, 1804)
(Described and illustrated by Pettibone, 1963a)

Specimens were collected in all areas of the Estuary,
except Hillsborough Bay, at 19 survey stations, and at a
total of five incidental localities in Old Tampa Bay and
Boca Ciega Bay (table 151).

Sediment data from dredge and shovel stations show
that the worm generally inhabits poorly sorted, medium sand
that contains less than five percent silt and clay, and about
one percent organic carbon. Average shell content of the
sediment was about 25 percent (table 152).

The bottom at seven of these stations was vegetated
with algae and one or more species of sea grasses that in-
cluded shoal grass, turtle grass, manatee grass and
widgeon grass.

No gravid specimens were seen, but juveniles were
collected in May, July, August, September, October, and
November.

A. irlcolor is a cosmopolitan species in temperate and
tropical waters, and is well known in the Gulf of Mexico.

368

Table 151. — Arabella Irlcolor — Locality records and number
of individuals from survey stations, Tampa Bay,
Florida, 1963-69 (D-dredge, S-shovel, N-net)

Old Tampa Bay

Stations

In

idlviduals Stations

Individuals

D

S

N

D S N

B-2
6-1-C

2

1

6-2
6-3

1
1

Upper Tampa Bay

10-3

2

11-28-1

4

Boca Ciega Bay

BC-M

BC-N

5

1

1 15-12
15-16

1

1

Terra Ceia Bay

E-6

1

Lower Tampa Bay

14-11

1

15-22

3

16-13

2

16-14

2

17-2 5

17-5 4

17-8 1
17-11

369

Table 152. — Arabella irlcolor — Mean and range of observed
environmental factors from survey stations,
Tampa Bay, Florida, 1963-69

Number
Factor Mean Range observations

Water temperature CO

Salinity (%.)

pH

Depth (m. )

Sediment type

Granules (wt. %)

Sands (wt. %)

Silts (wt. %)

Clay (wt. %)

CaC03 (wt. %)

Organic carbon (wt. %)

Organic nitrogen (wt. %)

Mean grain size,

total sample (0) 2.0 0.6 to 4.1 16

Standard deviation,

total sample (0) 1.5 0.9 to 2.3 16

Skewness, total sample 0.3 -1.1 to 1.6 17

Kurtosis, total sample 6.0 -0.2 to 21.2 15

Mean grain size,

noncarbonate fraction (0) 3.1 1.9 to 5.9 16

Standard deviation,

noncarbonate fraction (0) 1.4 0.7 to 2.1 16

Mean grain size,

carbonate fraction (0) -0.3 -1.8 to 2.3 14

Standard deviation,

carbonate fraction (0) 1.2 0.6 to 1.6 14

25.1

13.0 to 32.0

19

30.0

22.7 to 35.1

19

8.0

7.8 to 8.4

17

1.6

/l to 4.0

19

sand

shelly sand to
silty sand

17

4.4

0.0 to 21.5

17

91.0

72.5 to 98.2

17

3.4

0.0 to 22.1

17

1.1

0.0 to 5.2

17

25.8

1.1 to 94.8

17

1.0

0.2 to 3.3

14

0.1

0.01 to 0.2

14

370

Drilonereis cyllndrlca Hartman, 1951

Individuals were found in upper Tampa Bay and all
seaward areas of the Estuary at 13 survey stations, and
at one incidental locality in Boca Ciega Bay and another
in lower Tampa Bay (table 153).

Average sediment at dredge and shovel stations was
poorly sorted, fine sand that contained about 15 percent
shell, less than five percent silt and clay, and one per-
cent organic carbon (table 154) .

Algae were recorded in more than 60 percent of the
bottom samples, and were accompanied by one or more of the
following sea grasses — shoal grass, turtle grass, manatee
grass, and Halophila.

No specimens with mature gametes were noted, but
juveniles were collected in September, October, November,
and December.

D. cylindrica has been reported from North Carolina
and the Gulf of Mexico.

371

Table 153. — Drllonerels cyllndrlca — Locality records and
number of individuals from survey stations,
Tampa Bay, Florida, 1963-69 (D-dredge, S-
shovel, N-net)

Upper Tampa Bay

Stations

Individuals Stations

Individuals

D S N

D S N

10-1-A

1 12-6

1

Boca Ciega Bay

D-6 2 15-3 4

D-ll 1 16-4 1

PB-1 1 16-8 3

Terra Ceia Bay

E-2

1

E-5

1

Lower Tampa Bay

15-22
15-25

2

1

16-13

1

372

Table 154. — Drilonereis cylindrica — Mean and range of
observed environmental factors from survey
stations, Tampa Bay, Florida, 1963-69

Factor

Water temperature (*C.)
Salinity (%. )

PH

Depth (m.)

Sediment type

Granules (wt. %)

Sands (wt. %)

Silts (wt. %)

Clay (wt. %)

CaC03 (wt. %)

Organic carbon (wt. %)

Organic nitrogen (wt. %)

Mean grain size,

total sample (0) 2.3 1.3 to 3.0 13

Standard deviation,

total sample (0) 1.3 0.5 to 2.3 13

Skewness, total sample 0.3 -1.4 to 1.6 13

Kurtosis, total sample 9.4 0.4 to 23.9 13

Mean grain size,

noncarbonate fraction (0) 3.1 2.2 to 5.5 13

Number

Mean

Ranc

ie

observations

22.3

14.5

to

31.0

13

30.7

23.3

to

34.0

13

8.1

7„7

to

8.4

13

1.0

D-

to

3.0

13

sand

—

13

3.2

0.0

to

13.4

13

93.1

80.5

to

99.9

13

3.1

0.0

to

11.8

13

0.6

0.0

to

2.4

13

15.2

1.2

to

52.3

13

1.0

0.1

to

3.3

9

0.04

0.01 to 0.4

9

Standard deviation,

noncarbonate fraction (0) 1.2 0.4 to 2.9

Mean grain size,

carbonate fraction (0) -0.1 -1.8 to 1.4 13

Standard deviation,

carbonate fraction (0) 1.3 0.4 to 2.6 13

1.3

0.5

to

2.3

0.3

-1.4

to

1.6

9.4

0.4

to

23.9

3.1

2.2

to

5.5

1.2

0.4

to

2.9

0.1

-1.8

to

1.4

1.3

0.4

to

2.6

373

Drllonereis longa Webster, 1879
(Described and illustrated by Pettibone, 196 3a)

Collections were made only in Boca Ciega Bay at two
survey stations (table 155).

Sediments at both were poorly sorted, fine sand.
They contained about 10 percent shell, less than five
percent silt and clay, and less than one percent organic
carbon (table 156).

Bottom vegetation was recorded at one station, and
consisted of a mixture of algae and turtle grass.

Neither gravid nor juvenile specimens were collected.

This species occurs along the Atlantic coast between
New England and the Caribbean, and has been reported for
the Pacific between central California and Mexico. There
is no previous record for D. longa in the Gulf of Mexico.

374

Table 155. — Drilonerels lonqa — Locality records and number
of individuals from survey stations, Tampa Bay,
Florida, 1963-69 (D-dredge, S-shovel, N-net)

Boca Ciega Bay

Stations

Individuals Stations

Individuals

D S N

D S N

D-2

2 D-17

1

375

Table 156. — Drllonereis lonqa — Mean and range of observed
environmental factors from survey stations,
Tampa Bay, Florida, 1963-69

Factor

Mean

Number

Ranqe

observations

25.2 to 27.0

2

33.2 to 34.8

2

—

2

[\ to 0.7

2

—

2

1.7 to 7.1

2

91.2 to 93.9

2

0.3 to 3.7

2

0.7 to 1.4

2

7.3 to 12.6

2

—

1

1

Water temperature (*C.)

Salinity (%«,)

pH

Depth (m.)

Sediment type

Granules (wt. %)

Sands (wt. %)

Silts (wt. %)

Clay (wt. %)

CaC03 (wt. %)

Organic carbon (wt. %)

Organic nitrogen (wt. %)

Mean grain size,
total sample (0)

Standard deviation,
total sample (0)

Skewness, total sample

Kurtosis, total sample

Mean grain size,
noncarbonate fraction (0)

Standard deviation,
noncarbonate fraction (0)

Mean grain size,
carbonate fraction (0)

Standard deviation,
carbonate fraction (0)

26.1
34.0

8.2

0.5
sand

4.4
92.6

2.0

1.0

9.9

0.4

0.03

2.6 2.5 to 2.8

1.5 1.2 to 1.8

-0.2 -0.6 to 0.1

6.8 4.6 to 9.0

2.8 2.5 to 3.1

1.5 1.4 to 1.5

-0.04 -0.2 to 0.1

1.2 0.9 to 1.4

376

Drilonerels magna Webster and Benedict, 1887
(Described and illustrated by Pettibone, 1963a)

A total of 14 collections at survey stations came
from all areas of the Estuary except Hillsborough Bay. In
addition, specimens were found at one incidental locality
in Boca Clega Bay and at another in lower Tampa Bay (table
157).

Sediments at dredge and shovel stations all contained
more than 90 percent sand, which was mostly fine and poorly
sorted. Average shell content was over 15 percent, silt
and clay content was under two percent, and organic carbon
was less than one percent (table 158) .

Bottom vegetation was recorded at one-half of these
stations. Algae were present together with shoal, turtle,
or manatee grass.

No gravid specimens were collected, however, a juvenile
worm was found in September.

D. magna has been reported from the northeastern
Pacific, the southeastern Atlantic, and the western At-
lantic between Canada and Florida. It has also been re-
corded in the Gulf of Mexico.

377

Table 157. — Drllonereis magna — Locality records and number
of individuals from survey stations, Tampa Bay,
Florida, 1963-69 (D-dredge, S-shovel , N-net)

Old Tampa Bay

Stations

Ind

ivi

duals Stations

Individuals

0

S

N

D S N

6-7-A

1

Upper Tampa Bay

11-28-
12-1

•1

1
3

13-1-
13-1-

-A
-B

2

1

Boca Ciega Bay

D-2
D-6
D-15

2

1

PB-4
14-3
1

i
2

Terra Ceia Bay

E-2

2

E-6

2

Lower Tampa Bay

15-25

2

17-3

2

273

Table 158. — Drilonereis magna — Mean and range of observed
environmental factors from survey stations,
Tampa Bay, Florida, 1963-69

Factor

Water temperature (*C.)
Salinity (%.)

PH

Depth (m.)

Sediment type

Granules (wt. %)

Sands (wt. %)

Silts (wt. %)

Clay (wt. %)

CaC03 (wt. %)

Organic carbon (wt. %)

Organic nitrogen (wt. %)

Mean grain size,

total sample (0) 2.2 0.5 to 2.8 12

Standard deviation,
total sample (0)

Skewness, total sample

Kurtosis, total sample

Mean grain size,
noncarbonate fraction (0)

Standard deviation,
noncarbonate fraction (0)

Mean grain size,
carbonate fraction (0)

Standard deviation,
carbonate fraction (0)

Number

Mean

Ranq

le ob

servations

23.5

13.0

to

33.2

13

29.8

24.4

to

34.0

13

8.1

7.9

to

8.3

13

0.8

&

to

3.0

13

sand

—

13

2.6

0.0

to

7.1

13

95.6

91.2

to

99.2

13

1.1

0.1

to

3.0

13

0.5

0.0

to

1.4

13

15.5

1.7

to

85.2

12

0.2

0.1

to

0.3

9

0.01

0.00 tc

) 0.03

9

1.2

0.6

to

1.8

12

0.1

-1.2

to

1.6

12

10.7

0.4

to

21.2

12

2.6

1.9

to

3.4

12

1.1

0.4

to

1.9

12

0.1

-1.3

to

1.1

9

1.1

0.6

to

1.7

9

379

Arabella sp.

In the single specimen collected, the prostomium
was missing so that the presence or absence of eyes
could not be determined. Setae are all of the hooded,
acicular type (figure 7,C). Maxillary supports, maxillae,
and mandibles have been illustrated (figure 7,D,E,).
This species is probably quite closely related to A.
mutans which has been reported from North Carolina and
other localities in the Atlantic and Pacific (Day, 1967).

This undetermined arabellid was collected at a single
station in lower Tampa Bay (table 159).

380

Table 159. — Arabella sp. — Locality records and number of
Individuals from survey stations, Tampa Bay,
Florida, 1963-69 (D-dredge, S-shovel, N-net)

Lower Tampa Bay

Stations

Individuals Stations

Individuals

D S N

D S N

18-3

1

381

Family DORVILLEIDAE Chamberlln. 1919
As a group, the dorvllleids are distributed in seas

at all latitudes throughout the world. They are small

carnivores that inhabit a variety of bottom types where

they crawl or burrow.

Three species were collected in Tampa Bay. Dorvlllea

rudolphi was found in all areas of the Estuary, while

Ophryotrocha puerilis and Dorvlllea sp. were collected

only in areas of reduced salinity.

Key to DORVILLEIDAE Collected in Tampa Bay

1 Antennae and palps minute; head and body segments

bear rings of cilia Ophryotrocha puerilis

Antennae and palps long and smooth Dorvlllea

sp.

- Antennae and palps long; antennae segmented

and palps smooth Dorvillea rudolphi

Dorvillea rudolphi (delle Chiaje, 1828)
(Described and illustrated by Hartman, 1945)

Specimens were collected at a total of 32 survey
stations in all areas of the Estuary and at six other inci-
dental localities in Old Tampa Bay, upper Tampa Bay, Boca
Ciega Bay, and lower Tampa Bay (table 160).

Most collections were made in poorly sorted, fine
sand, but some worms were also taken in extremely soft sedi-
ments that contained a high percentage of silt and clay.
Shell in the granule and sand particle size classes

382

comprised about 25 percent of the sediment. Average silt
and clay content was nearly 10 percent, and organic carbon
was one percent (table 161). Algae were present at 10 of
the 25 dredge and shovel stations, together with shoal
grass or turtle grass.

Individuals with mature gametes were collected in
August and September, and a juvenile was found in August.

D. rudolphl has been recorded on both sides of the
Atlantic in temperate and tropical waters. It has also
been collected in the Gulf of Mexico and the eastern
Pacific.

383

Table 160. — Dorvillea rudolphi — Locality records and

number of individuals from survey stations,
Tampa Bay, Florida, 1963-69 (D-dredge, S-
shovel, N-net)

Old Tampa Bay

Stations

Individuals Stations

Individuals

D

S

N

D

S N

3-1-A
4-19

1

2

6-1-A
6-2

2

1

Hillsborough Bay

C-7

1

10-18

11

Upper Tampa Bay

11-8

11-18

11-19

1

1 11-20

2 11-28-1
13-1-A

1
5

1

Boca Ciega Bay

BC-G

1

15-1

BC-M

1

15-3

BC-N

8

15-4

D-2

5

1

15-12

D-18

4

16-1

PB-4

1

16-2

PB-5

2

Terra Ceia Bay

E-l

E-2

1

i

E-3

1

Lower Tampa Bay

16-14
17-2

1
1

17-3
18-3

4

6

384

Table 161. — Dorvlllea rudolphi — Mean and range of observed
environmental factors from survey stations,
Tampa Bay, Florida, 1963-69

Factor

Mean

Range

Number
observations

Water temperature (*C.)
Salinity (%. )

pH

Depth (m.)

Sediment type

Granules (wt. %)

Sands (wt. %)

Silts (wt. %)

Clay (wt. %)

CaC03 (wt. %)

Organic carbon (wt. %)

Organic nitrogen (wt. %)

Mean grain size,
total sample (0)

Standard deviation,
total sample (0)

Skewness, total sample

Kurtosis, total sample

Mean grain size,
noncarbonate fraction (0)

Standard deviation,
noncarbonate fraction (0)

Mean grain size,
carbonate fraction (0)

Standard deviation,
carbonate fraction (0)

24.2

14.6 to 31.8

25

29.6

18.3 to 34.9

25

8.1

7.5 to 8.4

24

1.2

l_l to 4.0

25

sand

shelly sand to
silty clay

25

7.9

0.0 to 45.2

25

82.4

14.6 to 99.4

25

4.6

0.0 to 35.2

25

5.3

0.0 to 65.9

25

25.1

0.7 to 95.0

24

1.0

0.1 to 4.8

14

0.04

0.00 to 0.2

14

2.3

-1.0 to 7.2

1.6 0.6 to 2.7

0.2 -1.7 to 3.4

7.5 -0.6 to 73.5

3.3 2.3 to 8.7

1.5 0.4 to 3.2

-0.1 -2.6 to 2.1

1.2 0.2 to 2.3

24

24
24
24

24

24

23

23

385

Ophyrotrocha puerllls Claparede and Metschnikov, 1869
(Described and illustrated by Day, 1967)

This minute worm was collected at only one station
in upper Tampa Bay (table 162).

Sediment there was poorly sorted, medium sand that
contained little shell, less than one percent organic
carbon, and over 12 percent silt and clay (table 163) .

No vegetation was recorded.

The single specimen collected was mature, but was not
in reproductive condition.

O. puerllls is a cosmopolitan species found in the
littoral zone of temperate and tropical seas. It has not
been previously reported from the Gulf of Mexico.

386

Table 162. — Ophryotrocha puerllls — Locality records and
number of individuals from survey stations,
Tampa Bay, Florida, 1963-69 (D-dredge, S-
shovel, N-net)

Upper Tampa Bay

Stations

Individuals Stations

Individuals

D S N

D S N

11-28

1

387

Table 163. — Ophryotrocha puerills — Mean and range of

observed environmental factors from survey
stations, Tampa Bay, Florida, 1963-69

Number
Factor Mean Range observations

Water temperature (*C.) 27.0 — 1

Salinity {%,) 24.9 — 1

pH 7.9 — 1

Depth (m.) 0.3 — 1

Sediment type sand — 1

Granules (wt. %) 1.8 — 1

Sands (wt. %) 85.5 — 1

Silts (wt. %) 10.5 — 1

Clay (wt. %) 2.2 n -- 1

CaC03 (wt. %) 3.3 — 1

Organic carbon (wt. %) 0.2 — 1

Organic nitrogen (wt. %) 0.01 — 1

Mean grain size,

total sample (0) 1.9 — 1

Standard deviation,

total sample (0) 1.8 — 1

Skewness, total sample 1.1 — 1

Kurtosis, total sample 5.6 — 1

Mean grain size,

noncarbonate fraction (0) 2.5 — 1

Standard deviation,

noncarbonate fraction (0) 1.2 — 1

Mean grain size,

carbonate fraction (0) 0.6 — 1

Standard deviation,

carbonate fraction (0) 1.0 — 1

388

Dorvillea sp.

This undetermined dorvilleid is less than 5 mm. long
and about 0.5 mm. wide. No eyes were noted. Both the
palps and antennae are smooth. The simple setae have a
faintly spinous margin and taper to a fine tip ( figure
7,F). Compound setae have a very short, distal appendage
that bears two, terminal teeth (figure 7,G).

Specimens were collected at one station in Old Tampa
Bay and one in Hillsborough Bay (table 164).

Sediments at both stations were moderately sorted,
medium sand. Data are not available for the content of
organic carbon, but it was probably quite low as the silt
and clay content was less than one percent (table 165).

No vegetation was noted at either station.

Both specimens appeared mature, but no gametes were
observed.

389

Table 164. — Dorvillea sp. — Locality records and number of
individuals from survey stations, Tampa Bay,
Florida, 1963-69 (D-dredge, S-shovel, N-net)

Old Tampa Bay

Stations

Individuals Stations

Individuals

D S N

D S N

6-2

1

Hillsborough Bay

8-9

1

390

Table 165. — Dorvillea sp. — Mean and range of observed

environmental factors from survey stations,
Tampa Bay, Florida, 1963-69

Factor

Number

Mean

Ranc

ie ob

servations

30.9

30.0

to

31.8

2

21.3

18.8

to

23.8

2

7.6

7.3

to

7.8

2

1.3

Z*

to

2.0

2

sand

—

2

3.1

0.0

to

6.4

2

96.7

93.6

to

99.9

2

0.03

0.0

to

0.07

2

0.02

0.0

to

0.05

2

16.3

0.6

to

32.0

2

Water temperature ( *C. )
Salinity (%„)

PH

Depth (m. )

Sediment type

Granules (wt. %)

Sands (wt. %)

Silts (wt. %)

Clay (wt. %)

CaC03 (wt. %)

Organic carbon (wt. %)

Organic nitrogen (wt. %)

Mean grain size,
total sample (0)

Standard deviation,
total sample (0)

Skewness, total sample

Kurtosis, total sample

Mean grain size,
noncarbonate fraction (0)

Standard deviation,
noncarbonate fraction (0)

Mean grain size,
carbonate fraction (0)

Standard deviation,
carbonate fraction (0)

2.0 1.4 to 2.5

0.9 0.5 to 1.3

-0.4 -0.5 to -0.3

10.7 0.1 to 21.3

3.0 3.0 to 3.1

1.8 1.7 to 2.0

-0.7 -1.7 to -0.2

1.3 1.1 to 1.5

Figure 7. — Diagnostic features of Lumbrineris sp.,
Arabella sp., and Dorvillea sp.

Lumbrineris sp.

Arabella sp.

Dorvillea sp.

(A) Simple, hooked seta from the

third setiger (B) Simple, hooked

seta from the tenth setiger

(C) Parapod and hooded, acicular

setae (D) Maxillary supports and

maxillae (E) Mandibles

(F) Simple seta from a median

parapod (G) Compound, hooked seta

from a median parapod.

FIGURE 7

ft&

392

393

Family LYSARETIDAE Klnberg, 1865
Members of this small family are found in temperate
and tropical waters throughout the world. Some have been
reported as commensals or parasites in crustaceans, and
others are carnivores that excavate burrows in sandy
sediments .

A single species, Lysarete braslllensis, was collect-
ed in Tampa Bay.

Lysarete brasiliensis Kinberg, 1865
(Described and illustrated by Hartman, 1951)

This species was collected only at two incidental
localities. A small specimen was taken by net near
station D-25 in lower Boca Ciega Bay, and a much larger
one was collected from the conveyor of an hydraulic clam
dredge along transect-14.

The individual collected in Boca Ciega Bay in April
was a juvenile.

394
Family ORBINIIDAE Hartman, 1942

The orblniids are burrowing or crawling polychaetes
that subsist on detritus and a variety of interstitial
organisms. The family is well represented in all seas.

Six species were collected in Tampa Bay. Two of these,
Scoloplos robustus and Scoloplos rubra, were collected in
all areas of the Estuary. Orbinla ornata and Scoloplos
fragilis were found in Old Tampa Bay, and upper and lower
Tampa Bay, while Naineris sp. was taken only at stations
seaward of Interbay Peninsula in upper Tampa Bay, Boca
Clega Bay, and Terra Ceia Bay. Naineris setosa had the
most restricted distribution, and was collected solely in
Boca Ciega Bay.
Key to ORBINIIDAE Collected in Tampa Bay

1 Prostomium short, anterior margin rounded 2

Prostomlum long and conical 3

2 Branchiae appear on setiger eight; acicular setae
present in anterior neuropodia Naineris sp.

- Branchiae appear on setiger 4 to 6, acicular

setae not present Naineris setosa

3 Acicular setae present in neuropodia of

anterior segments 4

- Acicular setae absent 5

4 Papillae present on ventrum of some

anterior segments Orbinla ornata

395

- Ventrum smooth Scoloplos rubra

5 Subpodal papillae present on branchial

segments Scoloplos fragllls

- Subpodal lamella present on branchial

segments Scoloplos robustus

Nalnerls setosa (Verrill, 1900)
(Described and illustrated by Hartman, 1951)

Specimens were collected only in Boca Ciega Bay at

two survey stations and four incidental localities (table

166).

Sediments at survey stations were poorly sorted sand.
Average content of silt and clay was nearly six percent and
organic carbon was almost two percent. Coarse, moderately
sorted shell, with a few larger fragments, comprised about
16 percent of the sediment (table 167).

Algae were recorded at all survey stations, and the
sea grasses found included shoal grass and turtle grass.
Turtle grass was also recorded at all incidental localities.
N. setosa is apparently restricted to sea grass beds in
areas where salinity is 30 parts per thousand, or higher.

Neither gravid nor juvenile specimens were collected

N. setosa is known only from the tropical, eastern
Atlantic, the Caribbean, and the Gulf of Mexico.

396

Table 166. — Nainerls setosa — Locality records and number

of individuals from survey stations, Tampa Bay,
Florida, 1963-69 (D-dredge, S-shovel, N-net)

Boca Ciega Bay

Stations

Individuals Stations

Individuals

D S N

D S N

D-25

1 16-2

2

397

Table 167. — Nainerls setosa — Mean and range of observed
environmental factors from survey stations,
Tampa Bay, Florida, 1963-69

Factor

Water temperature (*C.)

Salinity (%„)

PH

Depth (m. )

Sediment type

Granules (wt. %)

Sands (wt. %)

Silts (wt. %)

Clay (wt. %)

CaCCU (wt. %)

Organic carbon (wt. %)

Organic nitrogen (wt. %)

Mean grain size,

total sample (0) 2.8 1.9 to 3.4

Standard deviation,

total sample (0) 1.4 1.0 to 1.8 3

Skewness, total sample 0.2 -0.4 to 0.6 3

Kurtosis, total sample 5.0 1.2 to 11.6 3

Mean grain size,
noncarbonate fraction (.0)

Standard deviation,
noncarbonate fraction (0)

Mean grain size,
carbonate fraction (0)

Standard deviation,
carbonate fraction (0)

Number

Mean

Ranc

ie

observations

21.8

17.4 to

25.0

3

32.8

31.5 to

34.0

3

8.2

8.0 to

8.4

3

0.3

—

3

sand

—

3

3.1

0.6 to

7.5

3

91.3

88.9 to

94.8

3

4.6

2.1 to

8.0

3

1.0

0.3 to

1.9

3

16.3

9.6 to

23.4

3

1.6

0.1 to

4.5

3

0.1

0.01 tc

i 0.2

3

1.4

1.0

to

1.8

0.2

-0.4

to

0.6

5.0

1.2

to

11.6

4.74

2.5

to

8.7

1.5

1.1

zo

2.2

0.8

0.5

to

1.1

0.7

0.4

to

0.9

398

Orblnla ornata (Verrill, 1873)
(Described and illustrated by Pettlbone, 1963a)

Collections were made at four survey stations from
Old Tampa Bay to lower Tampa Bay, and at one incidental
locality (Port Tampa) in Old Tampa Bay (table 168).

Average sediment type at dredge and shovel stations
was poorly sorted, fine sand that contained about five
percent silt and clay, nearly 19 percent shell, and less
than one percent organic carbon (table 169).

One-half of the bottom samples contained vegetation.
Algae were noted at all, and some also had shoal, manatee
or widgeon grass.

Neither juveniles nor gravid specimens were collected.

0. ornata occurs in the Gulf of Mexico and on the
eastern and western North American coasts in temperate and
tropical waters.

399

Table 168. — Orbinia ornata — Locality records and number
of individuals from survey stations, Tampa
Bay, Florida, 1963-69 (D-dredge, S-shovel, N-
net)

Old Tampa Bay

Stations

Individuals Stations

Individuals

D S N

D S N

6-1-C

1

Upper Tampa Bay

11-16

1

Lower Tampa Bay

D-27

1 15-18

1

400

Table 169. — Orblnia ornata — Mean and range of observed
environmental factors from survey stations,
Tampa Bay, Florida, 1963-69

Factor

Number

Mean

Ranqe

observations

27.3

24.9

to

30.0

4

28.0

24.1

to

32.6

4

8.0

7.3,

to

8.2

4

1.0

D-

to

8.0

4

sand

—

4

3.2

0.3

to

10.5

4

91.4

72.8

to

99.4

4

3.5

0.0

to

11.8

4

1.9

0.0

to

4.9

4

18.6

1.5

to

58.4

4

0.6

0.1

to

2.0

4

0.1

OiOO tc

i 0.2

4

Water temperature (*C.)

Salinity (%„ )

pH

Depth (m.)

Sediment type

Granules (wt. %)

Sands (wt. %)

Silts (wt. %)

Clay (wt. %)

CaC03 (wt. %)

Organic carbon (wt. %)

Organic nitrogen (wt. %)

Mean grain size,
total sample (0)

Standard deviation,
total sample (0)

Skewness, total sample

Kurtosis, total sample

Mean grain size,
noncarbonate fraction (0)

Standard deviation,
noncarbonate fraction (0)

Mean grain size,
carbonate fraction (0)

Standard deviation,
carbonate fraction (0)

2.5

2.3 to 2.

1.4 0.9 to 2.7

0.2 -0.6 to 1.6

5.9 0.3 to 13.7

2.7 2.1 to 3.1

1.0 0.6 to 1.9

0.4 -0.4 to 1.0

1.3 0.9 to 2.0

401

Scoloplos fragilis (Verrill, 1873)
(Described and illustrated by Hartman, 1951)

Specimens were collected at one survey station in
upper Tampa Bay, and at two incidental localities (table
170) . The incidental collections came from a sandy shoal
south of Gandy Bridge in Old Tampa Bay, and a sandy beach
on a small shoal near transect-18 in lower Tampa Bay.

On the basis of analyses from a single station,
sediments were composed almost entirely of poorly sorted,
fine, siliceous sand (table 171).

The only plants recorded were algae.

Neither gravid nor juvenile specimens were collected.

S. fragilis has been recorded in the Gulf of Mexico
and on the Atlantic seaboard from Canada to southern
Florida.

402

Table 170. — Scoloplos fraqllls — Locality records and number
of individuals from survey stations, Tampa Bay,
Florida, 1963-69 (D-dredge, S-shovel, N-net)

tipper Tampa Bay

Stations

Individuals Stations

Individuals

D S N

D S N

D

8

403

Table 171. — Scoloplos fraqllls — Mean and range of observed
environmental factors from survey stations,
Tampa Bay, Florida, 1963-69

Factor

Mean

Range

Number
observations

Water temperature (*C.) 16.0

Salinity (%.) 27.9

pH 8.3

Depth (m. ) 0.3

Sediment type sand

Granules (wt. %) 5.5

Sands (wt. %) 94.5

Silts (wt. %) 0.0

Clay (wt. 50 0.0

CaC03 (wt. %) 1.7

Organic carbon (wt. %) 0.1

Organic nitrogen (wt. %) 0.00

Mean grain size,

total sample (0) 2.4

Standard deviation,

total sample (0) 1.6

Skewness, total sample -1.6

Kurtosis, total sample 10.6

Mean grain size,

noncarbonate fraction (0) 2.5

Standard deviation,

noncarbonate fraction (0) 0.6

Mean grain size,

carbonate fraction (0) 1.8

Standard deviation,

carbonate fraction (0) 1.0

404

Scoloplos robustus (Verrill, 1873)
(Described and illustrated by Pettibone, 1963a)

This species was found in all areas of the Estuary
at a total of 101 survey stations, and 10 incidental locali-
ties in all areas except Terra Ceia Bay (table 172). I ex-
pect that unidentifiable anterior fragments from an addi-
tional 36 survey stations, which have not been included,
should actually be referred to this species.

Sediment data show that the worm inhabited firm to
soft bottom, but was found mostly in poorly sorted, fine
sand. Average silt and clay content was under five percent,
shell was less than 10 percent, and organic carbon was
nearly one percent (table 173).

Algae were present at about one-half of the dredge
and shovel stations, together with one or more of the five
sea grasses found in the Estuary.

No gravid specimens were collected, but juvenile worms
were found in February, June, July, August, September, Octo-
ber, November, and December.

S. robustus has been collected in the Gulf of Mexico
and is otherwise known from the Atlantic coast between
Canada and North Carolina.

405

Table 172. — Scoloplos robustus — Locality records and

number of individuals from survey stations,
Tampa Bay, Florida, 1963-69 (D-dredge, S-
shovel, N-net

Old Tampa Bay

Stations

Individuals Stations

Individuals

D S N

D S N

A-2

3

A-5

5

A-6

4

B-l

9

B-2

12

3-12

3

3-13

12

3-14

1

4-5

1

4-19

2

5-2

2

5-3

5-4

5-7

6-1-A

6-1-C

6-1-D

6-2

6-4-A

6-5

6-7-A

10-1-A

10-2

1

10-6

1

10-8

1

10-11

1

5-2

2

1 6-8

2

Hillsborough Bay

C-l

C-4
8-9

6

41

11

9-1

10-15
1 10-23

1

30
6

Upper Tampa Bay

10-13

3

10-14-A

7

11-1

3

11-28

1

11-28-1

2

406

Table 172. — Scoloplos robustus — Locality records and

number of individuals from survey stations,
Tampa Bay, Florida, 1963-69 (D-dredge, S-
shovel, N-net)-(continued)

Boca Ciega Bay

Stations

Individuals Stations

Individuals

D S N

D S N

BC-A

2

15-

-2

42

BC-E

3

15-

-3

1

BC-G

2

15-

-6

5

BC-M

27

1

15-

-8

2

BC-N

2

15-

-11

7

D-2

6

15-

-12

20

D-3

1

15-

-13

15

D-6

49

15-

-15

4

D-2 3

6

15-

-16

1

D-2 4

2

15-17

4

D-25

1

1

16-

-1

e

PB-1

12

16-

-3

l

PB-4

22

16-

-4

2

PB-5

1

16-

-6

6

14-1-A

2

16-

-8

3

14-4

26

Terra Ceia Bay "

E-l
E-5

16

1 E-6
E-8

1

1

Lower Tampa Bay

D-27

2

14-6

IS

14-7

7

14-8

9

14-9

14

14-16

5

14-17

3

14-19

12

15-18

5

15-32

10

15-33

2

16-9-A

1

16-10

2

16-13

12

16-14

1

16-20

7

16-21

19

16-22

23

16-23

42

16-24

3

17-2

3

17-8

2 2

17-9

7

17-10

12

17-12

21

17-13

14

17-14

11

18-4

2

407

Table 173. — Scoloplos robustus — Mean and range of observed
environmental factors from survey stations,
Tampa Bay, Florida, 1963-69

Factor

Mean

Range

Number
observations

Water temperature (*C.)
Salinity (%„)

pH

Depth (m. )

Sediment type

Granules (wt. %)

Sands (wt. %)

Silts (wt. %)

Clay (wt. %)

CaC03 (wt. %)

Organic carbon (wt. %)

Organic nitrogen (wt. %)

Mean grain size,
total sample (0)

Standard deviation,
total sample (0)

Skewness, total sample

Kurtosis, total sample

Mean grain size,
noncarbonate fraction (0)

Standard deviation,
noncarbonate fraction (0)

Mean grain size,
carbonate fraction (0)

Standard deviation,
carbonate fraction (0)

25.3

13.0 to 34.1

101

28.4

15.6 to 35.1

101

8.0

7.1 to 8.4

91

0.9

/I to 4,0

101

sand

shelly sand to
sandy clay

101

2.2

0.0 to 20.8

101

94.0

24.5 to 99.9

101

2.4

0.0 to 22.1

101

1.5

0.0 to 65.9

101

8.8

0.5 to 68.0

101

0.7

0.01 to 6.9

68

0.04

0.00 to 0.2

68

2.6 0.6 to 7.1 100

1.2 0.5 to 2.7 100
0.3 -1.4 to 2.2 100

12.6 -0.6 to 43.9 99

3.0 1.4 to 6.1 99

1.4 0.5 to 3.2 99

-0.1 -2.5 to 2.5 92

1.3 0.2 to 3.1 92

408

Scoloplos rubra (Webster, 1879)
(Described and Illustrated by Hartman, 1951)

The most common orbinlid found In the Estuary, £3.
rubra was collected in all six areas at a total of 156
survey stations and seven incidental localities (table
174).

Specimens were found in a variety of firm to soft
sediment types, but the majority were collected in poorly
sorted, fine sand. Although higher at some stations,
average silt and clay content was usually less than five
percent. Average shell content was over 10 percent, and or-
ganic carbon was nearly one percent (table 175).

Forty percent of the dredge and shovel collections
contained algae together with one or more of the five sea
grasses found in the Estuary.

No gravid specimens were collected, but juveniles
were found from June through October.

S. rubra has been recorded from the Gulf of Mexico
and the southwestern Atlantic between Virginia and the
Caribbean.

409

Table 174. — Scoloplos rubra — Locality records and number

of individuals from survey stations, Tampa Bay,
Florida, 1963-69 (D-dredge, S-shovel, N-net)

Old Tampa Bay

Stations Individuals Stations Individuals

B

6

B-2

15

1-2

2

1-3

3

1-4

25

1-5

18

2-1

1

2-2

2

2-3

3

2-4

5

2-5

3

3-1-A

1

3-2

2

3-3

3

3-8

2

3-9

4

3-10

1

3-12

6

3-14

2

3-15

3

3-16

17

4-2

1

4-5

4

4-6

9

4-7

6

4-8

7

4-9

10

4-10

3

4-11

2

4-12

6

4-13

1

4-14

1

4-15

1

4-16

1

4-1 7-A

1

4-20

1

5-1-B

1

5-2

9

5-3

35

5-4

10

5-5

5

5-6

1

5-13

1

6-1-A

2

6-1-B

5

6-1-C

1

6-1-D

1

6 -7-A

12

Hillsborough Bay

C-2

1

C-3

5

9-3

2

10-15

43

10-16

26

10-19

10

10-20

1

10-22

27

10-23

10

410

Table 174. — Scoloplos rubra — Locality records and number

of individuals from survey stations, Tampa Bay,
Florida, 1963-69 (D-dredge, S-shovel, N-net)-
(continued)

Upper Tampa Bay

Stations

Individuals Stations

Individuals

D S N

D S N

10-4

4

10-8

1

10-9

1

10-10

1

10-11

1

10-12

7

10-13

2

11-2

11-16

1

11-25

62

11-26

32

11-27

13

11-28

1

11-28-1

7

11-28-2

1

12-1

1

12-11

1

12-14

2

12-15

2

13-1-A

4

13-1-B

1

13-8

2

13-12

1

Boca Ciega Bay

BC-A

3

BC-G

2

BC-M

22

BC-N

1

D-2

4

D-3

2

D-6

2

D-9

1

D-ll

17

D-12

5

D-19-A

1

D-2 3

12

D-25

1

PB-1

26

PB-4

2

14-1-A

4

10

14-4

6

15-1

1

15-2

2

15-3

2

15-6

1

15-9

1

15-11

4

15-12

5

15-13

9

15-14

1

15-17

1

16-3

1

16-4

3

16-5

1

16-8

2

Terra Ceia Bay

E-l
E-2
E-3

E-4
E-6
E-7

411

Table 174. — Scoloplos rubra — Locality records and number

of individuals from survey stations, Tampa Bay,
Florida, 1963-69 (D-dredge, S-shovel , N-net)-
(continued)

Lower Tampa Bay

Stations

Individuals Stations

Individuals

D S N

D S N

14-5

2

14-6

10

14-9

2

14-10

4

14-13

1

14-14

4

14-16

1

14-18

3

15-22

1

15-23

18

15-25

17

15-26

9

15-27

1

15-31

2

15-32

5

15-33

1

16-9

1

16-10

2

16-12

16-13

9

16-14

101

16-15

15

16-16

6

16-17

1

16-19

1

16-21

5

16-22

6

16-23

6

16-24

1

16-27

1

17-3

17

17-4

7

17-6

5

17-7

3

17-8

5

17-10

5

17-12

2

17-13

1

17-15

412

Table 175. — Scoloplos rubra — Mean and range of observed
environmental factors from survey stations,
Tampa Bay, Florida, 1963-69

Factor

Mean

Range

Number
observations

Water temperature (*C.)

Salinity (%. )

PH

Depth (m.)

Sediment type

Granules (wt. %)

Sands (wt. %)

Silts (wt. %)

Clay (wt. %)

CaC03 (wt. %)

Organic carbon (wt. %)

Organic nitrogen (wt. %)

Mean grain size,
total sample (0)

Standard deviation,
total sample (0)

Skewness, total sample

Kurtosis, total sample

Mean grain size,
noncarbonate fraction (0)

Standard deviation,
noncarbonate fraction (0)

Mean grain size,
carbonate fraction (0)

Standard deviation,
carbonate fraction (0)

25.6

13.0 to 33.8

161

28.0

16.4 to 34.8

161

8.0

7.0 to 8.4

160

1.0

/l to 3.0

161

sand

shelly sand to
sandy clay

142

2.7

0.0 to 99.7

160

92.2

8.0 to 100

160

2.9

0.0 to 22.8

160

1.8

0.0 to 65.9

160

11.3

0.6 to 85.2

159

0.8

0.1 to 6.9

108

0.1

0.00 to 0.3

108

2.5

-4.0 to 7.1

159

1.3

0.6

to

3.0

159

0.6

-1.6

to

3.6

159

11.5

-0.8

to

76.3

159

3.1

1.7

to

8.1

156

1.4

0.4

to

2.7

156

-0.2

-2.5

to

2.4

144

1.3

0.2

to

3.1

144

413

Nalneris sp.

This undetermined orbiniid resembles Hainerls setosa.
It is smaller, however (about 1 mm. wide by 20 mm. long)
and has acicular setae on thoracic segments. Behind the
short, rounded prostomium, there are several parapods with
long, dorsal and ventral cirri (figure 8, A) . Branchiae be-
gin on setiger eight and at first are shorter than the
dorsal cirrus (figure 8,B). By setiger 18, the branchiae
are at least twice the length of dorsal cirri and are pres-
ent on all except a few posterior segments (figure 8,C).
On anterior segments, notopodla have long spinigers (figure
8,D) and neuropodia have shorter spinigers, geniculate
setae (figure 8,E) and acicular setae (figure 8,F). In
median and posterior segments there are only spinigers.

Specimens were collected at a total of six survey sta-
tions in upper Tampa Bay, Boca Ciega Bay, and Terra Ceia
Bay (table 176).

Average sediment at shovel stations was poorly sorted,
fine sand. It contained about 12 percent shell, slightly
more than five percent silt and clay, and nearly one per-
cent organic carbon (table 177).

Plants found at three stations included algae, shoal
grass, turtle grass, and manatee grass.

414

Juvenile worms were collected in September, October,
and December, but no gravid specimens were found.

415

Table 176. — Nalnerls sp. — Locality records and number of
individuals from survey stations, Tampa Bay,
Florida, 1963-69 (D-dredge, S-shovel, N-net)

Upper Tampa Bay

Stations

Individuals Stations

Individuals

D

S N

D S N

11-28-1

7

Boca Ciega Bay

D-18
D-26

1 PB-1
30 16-8

1

15

Terra Ceia Bay

E-6

58

416

Table 177. — Nainerls sp. — Mean and range of observed

environmental factors from survey stations,
Tampa Bay, Florida, 1963-69

Factor

Water temperature (*C.)

Salinity (%.)

pH

Depth (m.)

Sediment type

Granules (wt. %)

Sands (wt. %)

Silts (wt. %)

Clay (wt. %)

CaCO- (wt. %)

Organic carbon (wt. %)

Organic nitrogen (wt. %)

Mean grain size,

total sample (0) 2.7 2.3 to 3.4

Standard deviation,
total sample (0)

Skewness, total sample

Kurtosis, total sample

Mean grain size,
noncarbonate fraction (0)

Standard deviation,
noncarbonate fraction (0)

Mean grain size,
carbonate fraction (0)

Standard deviation,
carbonate fraction (0)

Number

Mean

Ranc

ie ob

servations

21.7

13.0

to

25.5

5

30.6

24.4

to

34.9

5

8.1

8.0

to

8.2

5

0.3

—

5

sand

—

4

2.9

0.4

to

7.0

4

90.4

81.0

to

98.2

4

5.0

0.1

to

13.4

4

0.9

0.0

to

2.1

4

11.5

3.8

to

18.0

3

0.9

0.2

to

2.6

4

0.05

0.02 tc

i 0.07

4

1.6

0.9

to

2.0

3

0.3

-0.2

to

1.0

3

9.0

2.6

to

21.2

3

2.9

2.3

to

3.5

4

1.3

0.7

to

2.1

4

0.2

-0.6

to

1.1

4

1.1

0.9

to

1.4

4

417

Family PARAONIDAE Cerruti. 1909

These small worms occur in all seas where they burrow
in surface sediments, and ingest sand grains and detritus.

Four species were found in Tampa Bay. Aricidea
fragilis and Aricidea sp. were found in all areas of the
Estuary, and Aricidea taylori was absent only from Hills-
borough Bay. Clrrophorus furcatus is apparently more sensi-
tive to low salinity than the other three species as speci-
mens were taken only in upper Tampa Bay, Boca Ciega Bay,
and lower Tampa Bay.
Key to PARAONIDAE Collected in Tampa Bay

1 Less than 20 pairs of branchiae Aricidea sp.

- More than 20 pairs of branchiae 2

2 More than 40 pairs of branchiae Aricidea fragilis

- Less than 40 pairs of branchiae 3

3 Abdominal setigers bear capillary and

furcate setae Cirrophorus furcatus

- Abdominal setigers bear capillary setae
and bidentate hooks with a short arista
that arises between the 2 terminal

teeth Aricidea taylori

418

Arlcidea fragills Webster, 1879
(Described and illustrated by Pettibone, 1965)

The most common paraonid in Tampa Bay, A. fragills
was found at a total of 79 survey stations in all areas of
the Estuary, and at an additional five incidental localities
in Old Tampa Bay, Boca Ciega Bay, and lower Tampa Bay
(table 178) .

Specimens were taken from a variety of sediment types,
but the average was poorly sorted, fine sand that contained
over 10 percent shell, nearly six percent silt and clay,
and about one percent organic carbon (table 179) .

One-half of the dredge and shovel samples contained
algae and one or more species of sea grasses that included
shoal grass, manatee grass, turtle grass, and Halophila.

No gravid specimens were noted, but juveniles were
collected in July through November.

A. fragilis has been recorded in the Gulf of Mexico
and as far north as Virginia along the Atlantic seaboard.

419

Table 178. — Aricidea fraqllls — Locality records and

number of individuals from survey stations,
Tampa Bay, Florida, 1963-69 (D-dredge, S-
shovel, N-net)

Old Tampa Bay

Stations

Individuals Stations

Individuals

D S N

D S N

3-1-A

5-4

1 6-1-D
2 6-7-A

1

18

Hillsborough Bay

9-2

1

Upper Tampa Bay

D 1 10-13 2

D-28 1 12-1 2

10-0 1 13-1-A 3

420

Table 178. — Arlcldea fraqllis — Locality records and

number of individuals from survey stations,
Tampa Bay, Florida, 1963-69 (D-dredge, S-
shovel, N-net)-(continued)

Boca Ciega Bay

Stations

Individuals Stations

Individuals

D S N

D S N

BC-A

6

BC-C

2

BC-G

2

BC-H

1

BC-I

2

BC-M

4

D-l

10

D-2

40

D-3

15

D-5

D-6

33

D-9

45

D-10

13

D-ll

6

20

D-13

2

D-l 7

6

D-18

10

D-19-A

4

D-2 2

1

D-23

19

D-25

17

PB-1

5

29

PB-4

8

PB-5

8

14-1-A

1

14-2

1

15-1

2

15-2

5

15-3

8

15-4

7

15-5

3

15-6

4

15-8

6

15-9

1

15-10

1

15-11

1

15-12

3

15-13

4

15-14

2

15-16

1

16-1

30

16-2

1

16-3

14

16-4

7

16-5

S

16-7

1

16-8

16

Terra Ceia Bay
E-2 1 E-6

421

Table 178. — Arlcldea fraqills — Locality records and

number of individuals from survey stations,
Tampa Bay, Florida, 1963-69 (D-dredge, S-
shovel, N-net)-(continued)

Lower Tampa Bay

Stations

Individuals Stations

Individuals

D S N

D S N

14-16

1

14-18

1

15-18

1

15-33

5

16-9

3

16-11

3

16-19

1

16-20

9

16-21

5

16-22

2

16-23

1

16-25

17-2

3

17-6

1

17-8

23

17-9

33

17-10

4

17-14

1

17-15

14

422

Table 179. — Arlcldea fraqills — Mean and range of observed
environmental factors from survey stations,
Tampa Bay, Florida, 1963-69

Number
Factor Mean Range observations

Water temperature (*C.) 23.9 13.0 to 33.8 87

Salinity (%.) 31.3 18.4 to 34.9 87

pH 8.1 7.5 to 8.5 82

Depth (m. ) 0.7 £L to 4.0 87

Sediment type sand shelly sand to 86

silty clay

Granules (wt. %) 2.3 0.0 to 28.8 87

Sands (wt. %) 91.5 11.2 to 99.6 87

Silts (wt. %) 4.4 0.0 to 44.4 87

Clay (wt. %) 1.5 0.0 to 43.8 87

CaC03 (wt. %) 10.7 0.9 to 66.0 87

Organic carbon (wt. %) 0.8 0.1 to 6.9 61

Organic nitrogen (wt. %) 0.04 0.00 to 0.2 61

Mean grain size,

total sample (0) 2.7 1.1 to 7.1 87

Standard deviation,

total sample (0) 1.3 0.6 to 3.0 87

Skewness, total sample 0.3 -1.6 to 2.2 87

Kurtosis, total sample 9.7 -0.8 to 73.5 87

Mean grain size,

noncarbonate fraction (0) 2.9 1.4 to 8.7 77

Standard deviation,

noncarbonate fraction (0) 1.3 0.4 to 3.2

Mean grain size,

carbonate fraction (0) 0.2 -2.5 to 3.0 71

Standard deviation,

carbonate fraction (0) 1.2 0.4 to 2.9 71

1.3

0.6

to

3.0

0.3

-1.6

to

2.2

9.7

-0.8

to

73.5

2.9

1.4

to

8.7

1.3

0.4

to

3.2

0.2

-2.5

to

3.0

1.2

0.4

to

2.9

423
Aricidea taylorl Pettibone, 1965

Except for Hillsborough Bay, this species was found
throughout the Estuary at a total of 11 survey stations,
and one incidental location near Oldsmar in Old Tampa Bay
(table 180).

The only sediment type recorded was sand which was
mostly fine and poorly sorted. Even though the silt and
clay content was less than five percent, organic carbon
was over one percent. Shell content was about 16 percent
and most of it was in the sand size category (table 181) .

About one-third of the dredge and shovel samples con-
tained algae, and sea grasses that included shoal, turtle,
and manatee grass.

No gravid specimens were noted and no juveniles were
collected.

A. taylori has been collected in the Gulf of Mexico,
and was previously known only from Seahorse Key, Florida.

424

Table 180. — Aricidea taylori — Locality records and number

of individuals from survey stations, Tampa Bay,
Florida, 1963-69 (D-dredge, S-shovel, N-net)

Old Tampa Bay

Stations

In

dividuals Stations

Individuals

D

S N

D S N

B-2
6-1-D

2 6-7-A
7

1

Upper Tampa Bay

11-2

6

Boca Ciega Bay

15-15

4

Terra Ceia Bay

E-2

6

Lower Tampa Bay

16-13

16-14
16-22

3

5
1

17-2
17-15

2

1

425

Table 181. — Aricidea taylori — Mean and range of observed
environmental factors from survey stations,
Tampa Bay, Florida, 1963-69

Factor

Water temperature (*C.)

Salinity (%«,)

pH

Depth (m.)

Sediment type

Granules (wt. %)

Sands (wt. %)

Silts (wt. %)

Clay (wt. %)

CaC03 (wt. %)

Organic carbon (wt. %)

Organic nitrogen (wt. %)

Mean grain size,

total sample (0) 2.4 0.6 to 3.4 11

Standard deviation,

total sample (0) 1.2 0.8 to 1.6 11

Skewness, total sample 0.7 -0.6 to 2.2 11

Kurtosis, total sample 10.9 2.1 to 30.1 11

Mean grain size,

noncarbonate fraction (0) 3.8 1.9 to 8.1 11

Standard deviation,

noncarbonate fraction (0) 1.7 0.4 to 3.2 11

Mean grain size,

carbonate fraction (0) 0.2 -1.8 to 2.4 10

Standard deviation,

carbonate fraction (0) 1.1 0.6 to 1.5 10

Number

Mean

Ranc

ie

observations

25.1

14.5

to

33.2

11

29.5

24.1

to

34.5

11

8.1

7.9

tc

8.3

11

1.2

Zi

to

4.0

11

sand

—

11

1.8

0.0

to

7.9

11

94.9

90.7

to

99.3

11

2.3

0.4

to

6.6

11

1.1

0.1

to

3.7

11

16.1

0.9

to

68.0

11

1.4

0.2

to

3.3

S

0.1

0.01 to 0.3

8

426

Clrrophorus furcatus (Hartman, 1957)
(Described and illustrated by Hartman, 1969)

Aside from a single collection along transect-12 in
upper Tampa Bay, all specimens were found in more saline
waters along transects 15, 16, and 17 (table 182).

All collections were made by dredge at an average
depth of over 2 m. Sediments at these stations were
mostly medium sand that was poorly sorted. The shell
content was high, average amount of silt and clay was
nearly five percent, and organic carbon was one percent
(table 183).

Algae were present at only one dredge station, and
no sea grass was noted.

Neither juveniles nor gravid adults were collected.

C. furcatus has never before been recorded in the
Gulf of Mexico. Previous reports were limited to speci-
mens collected along the coast of southern California.

427

Table 182. — Cirrophorus furcatus — Locality records and
number of individuals from survey stations,
Tampa Bay, Florida, 1963-69 (D-dredge, S-
shovel, N-net)

Upper Tampa Bay «

Stations

Individuals Stations

Individuals

D

S

N

D S N

12-8

1

Boca Ciega Bay

15-12

1

15-17

1

Lower Tampa Bay

15-22
16-13
16-14

2

4
7

16-15
17-2

1

1

428

Table 183. — Cirrophorus furcatus — Mean and range of

observed environmental factors from survey
stations, Tampa Bay, Florida, 1963-69

Number
Factor Mean Range observations

Water temperature (*C.)

Salinity (%„)

PH

Depth (m. )

Sediment type

Granules (wt. %)

Sands (wt. %)

Silts (wt. %)

Clay (wt. %)

CaC03 (wt. %)

Organic carbon (wt. %)

Organic nitrogen (wt. %)

Mean grain size,

total sample (0) 2.0 0.6 to 4.1

Standard deviation,
total sample (0)

Skewness, total sample

Kurtosis, total sample

Mean grain size,
noncarbonate fraction (0)

Standard deviation,
noncarbonate fraction (0)

Mean grain size,
carbonate fraction (0)

Standard deviation,
carbonate fraction (0)

23.4

16.0 to 26.8

8

32.4

27.1 to 34.5

8

8.1

7.9 to 8.3

8

2.2

£1 to 4.0

8

sand

sand to
silty sand

8

2.9

0.1 to 7.9

8

92.4

72.5 to 99.2

8

3.8

0.4 to 22.1

8

0.9

0.1 to 5.2

8

34.2

2.3 to 68.0

8

1.0

0.2 to 3.3

8

0.1

0.02 to 0.2

8

1.4

0.7 to

2.0

0.3

-0.1 to

0.7

5.4

-0.04 to

17.3

3.6

2.2 to

5.9

1.6

0.6 to

3.2

0.2

-1.8 to

1.8

1.2

0.9 to

1.6

429
Arlcidea sp.

This problematic species can be immediately recognized
by its small number of branchiae, and distinctly, bifurcate
antenna (figure 8,G). On branchial segments the notopodlal
lobe is about one-half as long as the branchial filament
(figure 8,H) . Sharply curved hooks with entire tip and
arista occur in abdominal segments — all other setae are
capillary (figure 8,1).

Specimens were collected at a total of 38 survey sta-
tions in all areas of the Estuary, and at one incidental
locality near Port Tampa in Old Tampa Bay (table 184).

They were generally found in poorly sorted, fine sand
that contained an average of six percent shell, about five
percent silt and clay, and over one percent organic carbon
(table 185).

Sixty-five percent of the dredge and shovel samples
contained algae. Shoal grass, turtle grass, manatee grass,
and Halophila were also recorded.

Gravid specimens were not noted and no juvenile worms
were collected.

430

Table 184. — Aricldea sp. — Locality records and number of
individuals from survey stations, Tampa Bay,
Florida, 1963-69 (D-dredge, S-shovel, N-net)

Old Tampa Bay

Stations

Individuals Stations

Individuals

D S N

D S N

A

B-l
B-2
2-3

D-23
16-1
16-2
16-3
16-4

14-5
16-9-B
16-20
16-21

218
3

5-3
6-1-A
6-1-B
6-1-D

2
6
1
6
56

16-5
16-6
16-7
16-8

12
6

9

3-14

1 6-2

12

Hillsborough Bay

C-l

C-2

2

13 10-15

1

Upper Tampa Bay

10-0

10-11

10-12

1

6

2 10-13

11-28-1
13-1-B

1

1
27

Boca Ciega Bay

13

Terra Ceia Bay

E-2

25

2-6

8

Lower Tampa Bay

16-22

12

16-23

6

16-27

2

16

17-9

431

Table 185. — Arlcldea sp. — Mean and range of observed

environmental factors from survey stations,
Tampa Bay, Florida, 1963-69

Number
Factor Mean Range observations

Water temperature (*C.)

Salinity (%.)

PH

Depth (m.)

Sediment type

Granules (wt. %)

Sands (wt. %)

Silts (wt. %)

Clay (wt. %)

CaC03 (wt. %)

Organic carbon (wt. %)

Organic nitrogen (wt. %)

Mean grain size,

total sample (0) 2.7 1.4 to 7.1 37

Standard deviation,

total sample (0) 1.2 0.7 to 2.7 37

Skewness, total sample 0.6 -1.3 to 2.6 37

Kurtosis, total sample 13.1 -0.6 to 43.8 37

Mean grain size,

noncarbonate fraction (0) 3.2 1.4 to 8.7 38

Standard deviation,

noncarbonate fraction (0) 1.4 0.4 to 2.8 38

Mean grain size,

carbonate fraction (0) -0.3 -2.2 to 1.4 35

Standard deviation,

carbonate fraction (0) 1.4 0.5 to 3.1 35

26.5

13.0

to

32.0

38

27.5

18.3

to

34.3

38

8.0

7.7

to

8.4

36

0.7

0-

to

1.7

38

sand

sand
clay

to

sandy

38

1.8

0.0

to

13.4

38

92.8

24.5

to

99.9

38

2.7

0.0

to

9.6

38

2.6

0.0

to

65.9

38

6.0

0.6

to

32.0

37

1.1

0.1

to

4.8

26

0.1

0.01 to 0.2

26

Figure 8. — Diagnostic features of Naineris sp., and
Aricidea sp.

Naineris sp. : (A) Second setiger (B) Eighth setiger

(C) Eighteenth setiger (D) Median section
of spiniger showing arrangement of spines
(E) Geniculate neuroseta (F) Acicular
neuroseta

Aricidea sp. : (g) Head and anterior segments showing
antenna and branchiae (H) Branchial
segment (I) Hooked seta from abdominal
segment.

FIGURE 8

433

434
Family SPIONIDAE Grube, 1850

The spionids occur commonly in estuarlne and nerltic
waters throughout the world, where they produce membranous
dwelling tubes in sediment, shell, or rock. They are de-
posit feeders, and obtain food by means of long, ciliated
tentacles that sweep through the water and across the bottom.

Thirteen species were collected in Tampa Bay. Aon ides
mayaguezensis is apparently confined to waters of high
salinity, and was found only in lower Tampa Bay near Eg-
mont Key. Somewhat more tolerant of brackish conditions,
Dispio uncinata was collected as far into the Estuary as
upper Tampa Bay. Six species were found in all areas of
the Estuary ( Paraprionospio pinnata, Prionospio cirro-
branchiata, Scolelepls sguamata, Polydora socialis, Poly-
dora websteri, and Streblosplo benedicti) . Of the remaining
five species, four were found everywhere except Hills-
borough Bay (Apoprionospio pygmaea, Prionospio hetero-
branchia texana, Spio setosa, and Splophanes bombyx) .
Pseudopolydora sp. was collected in all areas except Terra
Ceia Bay.
Key to SPIONIDAE Collected in Tampa Bay

1 Fifth setiger bears large, acicular setae 2

- Acicular setae absent 4

2 Hooded hooks commence on setiger 7 3

435

- Hooded hooks commence on setiger 8.. Pseudopolydora sp.

3 Hooded hooks constricted near middle of

the shaft Polydora websteri

- Shaft of hooded hooks not constricted

near middle Polydora soclalls

4 Prostomium bears lateral projections;

branchiae absent Splophanes bombyx

- Prostomium smoothly rounded or pointed;

branchiae present 5

5 Second setiger bears a raised, dorsal
membrane with median notch; 1 pair of

branchiae; 1 pair of palps Streblosplo benedicti

- Dorsal membrane absent on second setiger;

branchiae more numerous 6

6 Branchiae partially fused to notopodial

lamellae 7

Branchiae not fused to notopodial lamellae 8

7 Notopodia of anterior segments divided
dorsally into numerous cirriform

processes Displo uncinata

- Notopodia not divided; prostomium acutely

pointed; 4 eyes arranged in a line. .Scolelepis squama ta

- Notopodia not divided; prostomium broadly
rounded; 4 eyes arranged in a

rectangle Spio setosa

8 Branchiae all smooth and cirriform 9

Some or all branchiae pinnate 10

9 Prostomium broad and rounded anteriorly;
eyes indistinct or absent; no occipital

tentacle Prionospio clrrobranchiata

436

- Prostomlum narrow anteriorly; 4 eyes
in front of short, occipital

tentacle Aon ides mayaguezensls

10 Branchiae 3 pairs, all

pinnate Paraprionospio pinnata

- Branchiae 5 pairs, first, fourth,

and fifth pinnate .... Prionospio heterobranchla texana

- Branchiae 4 pairs, fourth

pinnate Apoprionospio pygmaea

Aonides mayaguezensls Foster, 1969

Eight specimens were collected from a single station
(18-3) in lower Tampa Bay (table 186).

Sediment there was very poorly sorted, shelly sand
that contained more than 13 percent shell. Over 20 percent
of the sample consisted of particles in the granule size
category. Silt, clay, and organic carbon percentages were
quite low (table 187).

No vegetation was found at the collection site.

Neither gravid nor juvenile specimens were collected.

A. mayaguezensls was previously known only from the
type locality near Mayaguez, Puerto Rico.

437

Table 186. — Aonides mayaquezensis — Locality records and
number of individuals from survey stations,
Tampa Day, Florida, 1963-69 (D-dredge, S-
shovel, N-net)

Lower Tampa Bay

Stations

Individuals Stations

Individuals

D S N

D S N

18-3

8

438

Table 187. — Aonides mayaquezensis — Mean and range of

observed environmental factors from survey
stations, Tampa Bay, Florida, 1963-69

Factor

Mean

Ran^e

Number
observations

Water temperature (

•c.

)

25.0

Salinity (%„)

33.8

PH

8.2

Depth (m. )

3.0

Sediment type
Granules (wt.

%)

shelly

sand

20.8

Sands (wt. %)

77.4

Silts (wt. %)

1.6

Clay (wt. %)

0.2

CaC03 (wt. %)

13.2

Organic carbon (wt.

%)

0.1

Organic nitroc

jen ( v

t.

%)

0.02

Mean grain size,

total sample (0) 0.9

Standard deviation,

total sample (0) 2.0

Skewness, total sample 0.1

Kurtosis, total sample -0.03

Mean grain size,

noncarbcnate fraction (0) 2.7

Standard deviation,
noncarbonate fraction (0) 1.1

Mean grain size,

carbonate fraction (0) 0.9

Standard deviation,

carbonate fraction (0) 0.9

439

Apoprionosplo pycpnaea (Hartman, 1961)

(Described by Foster, 1969 and

Illustrated by Hartman, 1969)

Specimens were collected at a total of 94 survey
stations in all areas of the Estuary except Hillsborough
Bay. In addition, individuals were found at two incident-
al localities in Boca Ciega Bay (table 188).

Sediments at dredge and shovel stations were mostly
poorly sorted, fine sand that contained few large particles
and less than 10 percent shell in all size categories. The
average content of silt and clay was less than four percent,
and organic carbon was under one percent (table 189).

Algae were present in bottom samples from 32 stations,
and also found in one or more of these samples were shoal
grass, turtle grass, and manatee grass.

No gravid specimens were noted, but juveniles were
collected in August, September, and November.

A. pygmaea was previously known only from southern
California.

440

Table 188. — Apoprionospio pyqmaea — Locality records and
number of individuals from survey stations,
Tampa Bay, Florida, 1963-69 (D-dredge, S-
shovel, N-net)

Old Tampa Bay

Stations

Individuals

Stations

Individuals

3-8

2

3-9

1

3-10

3

3-12

1

3-13

1

4-5

3

4-10

3

4-16

2

4-19

10

5-2

1

5-3

2

5-4

3

5-5

3

5-6

10

5-7

6

5-8

1

5-11

6

5-13

2

6-4-A

15

6-6

1

Upper Tampa Bay

D

4

10-5

4

10-6

11

10-7

1

10-8

1

10-9

6

10-10

1

10-12

4

10-14-A

1

11-4

14

11-6

1

11-21

12-5

14

12-7

2

12-15

2

13-12

3

13-13

441

Table 188. — Apoprlonospio pyqmaea — Locality records and
number of individuals from survey stations,
Tampa Bay, Florida, 1963-69 (D-dredge, S-
shovel, N-net)-(continued)

Boca Ciega Bay

Stations

Individuals Stations

Individuals

D S N

D S N

BC-E

13

BC-M

1

BC-N

1

D-l

5

D-2

16

D-3

2

D-9

4

D-ll

1

D-13

2

D-17

26

1

D-19-A

1

D-24

2

D-25

1

PB-4

1

PB-5

5

14-2

2

15-1

2

15-3

1

15-4

3

15-5

1

15-6

2

15-8

2

15-9

10

15-10

1

15-11

13

15-12

5

15-13

14

15-17

8

16-1

1

16-6

37

16-7

14

Terra Ceia Bay

E-4 24 E-5

Lower Tampa Bay

14-5

11

14-8

7

14-16

2

14-17

2

14-18

12

15-18

3

15-19

9

15-20

1

16-11

2

16-19

4

16-20

17

16-21

10

16-22

3 0

16-23

11

17-3

5

17-6

1

17-7

1

17-8

11

17-9

30

17-10

58

17-12

2

17-13

1

17-14

9

18-4

6

442

Table 189.~Apoprionospio pyqmaea — Mean and range of

observed environmental factors from survey
stations, Tampa Bay, Florida, 1963-69

Factor

Mean

Range

Number
observations

Water temperature (*C.)

Salinity (%.)

PH

Depth (m.)

Sediment type

Granules (wt. %)

Sands (wt. %)

Silts (wt. %)

Clay (wt. %)

CaC03 (wt. %)

Organic carbon (wt. %)

Organic nitrogen (wt. %)

Mean grain size,
total sample (0)

Standard deviation,
total sample (0)

Skewness, total sample

Kurtosis, total sample

Mean grain size,
noncarbonate fraction (0)

Standard deviation,
noncarbonate fraction (0)

Mean grain size,
carbonate fraction (0)

Standard deviation,
carbonate fraction (0)

24.9

12.8 to 33.8

91

29.0

19.2 to 34.8

91

8.1

7.7 to 8.4

83

1.0

£1 to 2.7

91

sand

shelly sand to
silty sand

89

1.8

0.0 to 28.8

89

94.2

27.9 to 100

89

2.4

0.0 to 22.1

89

0.8

0.0 to 5.2

33

8.4

0.6 to 85.2

89

0.8

0.01 to 8.5

66

0.04

0.00 to 0.2

66

2.5 0.5 to 4.1 89

1.1 0.4 to 3.0 89

0.6 -1.7 to 3.6 89

15.7 -0.8 to 76.3 89

3.0 1.4 to 9.0 88

1.4 0.5 to 2.7 88

-0.2 -2.5 to 3.0 78

1.3 0.3 to 2.9 78

443

Displo unclnata Hartman, 1951

Specimens were collected at only one survey station
in upper Tampa Bay, and at one in Boca Ciega Bay (table
190).

In both localities the sediment was poorly sorted,
fine sand. Shell content was less than 10 percent and
there were few large shell fragments. Even though the
percentage of silt and clay was less than four, organic
carbon content was over two percent (table 191) .

Algae were found in bottom samples from both stations,
but no sea grasses were noted.

The specimen taken in Boca Ciega Bay in September was
a juvenile. Off St. Petersburg Beach, juveniles were also
collected in May. No gravid specimens were recorded.

D. uncinata has been collected in the Gulf of Mexico
and is otherwise known from the waters of New England.

444

Table 190. — Dispio unclnata — Locality records and number

of individuals from survey stations, Tampa Bay,
Florida, 1963-69 (D-dredge, S-shovel, N-net)

Upper Tampa Bay

Stations

Individuals Stations

Individuals

D S N

D S N

10-10

1

Boca Ciega Bay

15-4

1

445

Table 191. — Displo uncinata — Mean and range of observed
environmental factors from survey stations,
Tampa Bay, Florida, 1963-69

Factor

Water temperature (*C.)

Salinity {%.)

pH

Depth (m.)

Sediment type

Granules (wt. %)

Sands (wt. %)

Silts (wt. %)

Clay (wt. %)

CaCO, (wt. %)

Organic carbon (wt. %)

Organic nitrogen (wt. %)

Number

Mean

Ranqe

observations

27.5

25.0 to 29.9

2

26.8

20.5 to 33.1

2

8.1

7.9 to 8.2

2

0.7

—

2

sand

—

2

4.8

0.0 to 9.7

2

91.8

83.7 to 100

2

2.8

0.0 to 5.7

2

0.5

0.0 to 1.0

2

8.1

1.0 to 15.1

2

2.5

—

1

0.01

—

1

Mean grain size,

total sample (0) 2.4 2.3 to 2.5

\
Standard deviation,
total sample (0) 1.6 0.6 to 2.5

Skewness, total sample -1.1 -1.4 to -0.8 2

Kurtosis, total sample 6.6 3.1 to 10.2 2

Mean grain size,

noncarbonate fraction (0) 2.8 2.7 to 2.8 2

Standard deviation,

noncarbonate fraction (0) 1.2 1.1 to 1.3 2

Mean grain size,

carbonate fraction (0) -0.9 -1.1 to -0.8 2

Standard deviation,

carbonate fraction (0) 1.2 — 2

446

Paraprionosplo pinnata (Ehlers, 1901)
(Described and illustrated by Foster, 1969)

Well represented in all areas of the Estuary, P.
pinnata was collected at a total of 197 survey stations,
and at two incidental localities in Old Tampa Bay as well
as one in Boca Ciega Bay. The area of least abundance was
lower Tampa Bay. The worm was especially abundant at sta-
tion 14-2 where 357 individuals were collected in a single
dredge haul (table 192).

Although the worm was found mostly in sand, it oc-
curred in a range of sediment types from shelly sand to
silty clay. Average sediment at dredge and shovel stations
was poorly sorted, very fine sand. The content of organic
carbon was nearly one percent and the percentage of silt and
clay was over 15 percent. Large shell fragments were pres-
ent at only a few stations, and the average shell content
of sediments was under 10 percent (table 193).

Twenty-eight percent of the bottom samples contained
algae and sea grasses were present in many. Halophlla
was the only sea grass not recorded.

Gravid specimens were collected in August, and juve-
niles were taken in June through November.

P. pinnata has been collected in temperate and tropi-
cal waters of the Atlantic and in the eastern Pacific. It
has also been recorded from the Gulf of Mexico.

447

Table 192. — Paraprionospio pinna ta — Locality records and
number of individuals from survey stations,
Tampa Bay, Florida, 1963-69 (D-dredge, S-
shovel, N-net)

Old Tampa Bay

Stations

Individuals Stations

Individuals

D S N

D S N

D

55

7

B-l

1

1-2

11

1-3

40

12

1-4

36

241

1-5

23

53

2-2

1

2-3

2

2-4

1

2-5

3

3-2

17

3-3

6

3-4

49

163

3-5

27

85

3-6

28

59

3-7

38

58

3-8

52

4

3-9

44

3-10

7

3-11

56

3

3-12

116

6

3-13

1

4-2

11

6

4-3

9

10

4-4

26

58

4-5

62

3

4-6

70

13

4-7

116

93

4-8

37

38

4-9

48

4-10

11

2

4-11

42

4-12

83

4

4-13

139

72

4-14

75

23

4-15

80

74

4-16

75

23

4-1 7-A

75

1

4-18-A

3

1

4-19

9

2

4-20

2

5-1-A

1

5-1-B

5

6

5-2

5

5-3

3

1

5-4

12

5-5

7

5-6

23

5-7

4

5-8

4

5-9

3

5-11

2

5-12

14

2

5-13

9

6-1-A

1

6-1-C

1

6-2

2

6-4-A

27

6-5

4

6-6

2

448

Table 192.

-Paraprionospio pinnata — Locality records and
number of individuals from survey stations,
Tampa Bay, Florida, 1963-69 (D-dredge, S-
shovel, N-net)-(continued)

Hillsborough

Bay

Stations

Individuals

Stations

Indiv:

Lduals

D

S N

□

S

N

C-2

51

3

9-2

14

C-3

4

56

9-3

64

1

C-4

3

9-4

31

9

C-5

1

2

9-5

1

C-6

1

9-6

26

7-1

2

9-7

3

8

7-3

1

9-8

3

8-1

24

10-15

29

10

8-2

11

18

10-16

20

8-3

5

5

10-17

41

3

8-4

1

10-19

49

10

8-5

1

10-20

5

102

8-7

Z

10-21

56

8-8

2

10-22

49

12

8-9

3

Upper Tampa

Bay

10-6

1

11-18

112

22

10-8

5

11-19

87

19

10-9

4

11-20

27

18

10-12

4

11-21

9

18

10-14-B

4

11-22

69

18

11-4

9

2

11-23

80

8

11-6

23

11-24

105

17

11-7

34

36

11-25

161

43

11-8

46

100+

11-26

186

8

11-9

116

11-27

173

13

11-10

2

11-28

8

11-11

9

8

11-28-2

2

11-12

74

17

12-11

1

11-13

36

7

12-14

15

11-14

198

20

12-16

2

11-15

352

26

13-12

18

11-16

84

25

13-13

2

11-17

28

23

449

Table 192. — Paraprionospio pinnata — Locality records and
number of Individuals from survey stations,
Tampa Bay, Florida, 1963-69 (D-dredge, S-
shovel, N-net)-(continued)

Boca Ciega Bay

Stations

Individuals Stations

Individuals

D S N

D S N

BC-A

55

5

BC-A-1

1

BC-C

3

BC-E

1

BC-H

9

BC-I

32

BC-M

66

BC-N

1

D-l

31

D-2

27

D-3

2

D-5

28

D-6

3

D-9

26

D-10

43

1

D-ll

3

D-13

18

15

D-15

2

32

D-17

15

5

D-19-B

115

D-20

57

12

D-21

19

1C

D-22

75

D-24

2

D-2 5

1

1

PB-1

110

1

50

PB-4

10

1

PB-5

17

14-2

357

6

14-3

37

14-4

188

15-1

42

?

15-3

2

15-4

50

15-5

289

3

15-6

18

15-8

135

3

15-9

10

15-11

291

1

15-12

96

1

15-13

221

1

15-14

49

12

15-15

8

7

15-17

76

1

16-1

1

16-5

4

16-6

28

16-7

79

2

16-8

1

Terra Ceia Bay

E-l

E-2
E-3
E-4

on

218
33

42

E-5
E-7
E-8

4

63
1

450

Table 192. — Paraprlonosplo pinnata — Locality records and
number of Individuals from survey stations,
Tampa Bay, Florida, 1963-69 (D-dredge, 3-
shovel, N-net)-(continued)

Lower Tampa Bay

Stations

Individuals Stations

Individuals

D S N

D S N

14-8

43

14-19

1

14-20

1

15-18

39

15-29

1

15-32

2

16-10

1

16-11

2

16-16

1

16-20

20

16-21

6

16-22

19

17-2

1

17-8

1

17-9

5

17-13

45

17-14

32

451

Table 193. — Paraprlonosplo pinnata — Mean and range of
observed environmental factors from survey
stations, Tampa Bay, Florida, 1963-69

Number
Factor Mean Range observations

Water temperature (*C.)

Salinity (%0)

pH

Depth (m.)

Sediment type

Granules (wt. %)

Sands (wt. %)

Silts (wt. %)

Clay (wt. %)

CaCO, (wt. %)

Organic carbon (wt. %)

Organic nitrogen (wt. %)

Mean grain size,

total sample (0) 3.2 -4.0 to 8.0 185

Standard deviation,

total sample (0) 1.4 0.4 to 3.5 185

Skewness, total sample 0.6 -1.7 to 3.6 185

Kurtosis, total sample 10.9 -1.3 to 76.3 185

Mean grain size,

noncarbonate fraction (0) 3.1 1.4 to 9.0 176

Standard deviation,

noncarbonate fraction (0) 1.5 0.4 to 3.2 176

Mean grain size,

carbonate fraction (0) -0.2 -2.6 to 3.0 169

Standard deviation,

carbonate fraction (0) 1.3 0.2 to 3.1 169

25.9

12.8 to 33.8

188

27.1

15.6 to 34.8

187

7.2

7.0 to 8.5

166

1.2

£1 to 4.0

188

sand

shelly sand to
silty clay

185

1.7

0.0 to 79.7

185

84.6

3.5 to 99.9

185

7.9

0.0 to 56.5

185

5.8

0.0 to 65.9

185

9.7

0.6 to 66.0

185

0.8

0.01 to 8.5

109

0.1

0.00 to 0.2

110

452

Polydora soclalis (Schmarda, 1861)
(Described and Illustrated by Blake, 1971)

Found in all areas of the Estuary, P. soclalis was
collected at a total of 139 survey stations and at 12
incidental localities. Areas of least abundance were Old
Tampa and Hillsborough Bays (table 194).

Average sediment type at dredge and shovel stations
was poorly sorted, fine sand that contained over 15 per-
cent shell. The content of silt and clay was about six
percent and organic carbon was under one percent (table
195).

Algae, shoal grass, turtle grass, or manatee grass,
were present in 58 of the bottom samples.

A gravid specimen was collected in September, and
juvenile worms were found in August through December.

P. soclalis has been reported from the Gulf of Mexico
and is otherwise known along the Atlantic seaboard of North
America and in the eastern Pacific.

453

Table 194. — Polydora soclalis — Locality records and number
of individuals from survey stations, Tampa Bay,
Florida, 1963-69 (D-dredge, S-shovel, N-net)

Old Tampa Bay

Stations Individuals Stations Individuals

A-l

A-3

B-2

3-10

2

3-16

4-11

1

4-12

1

4-16

1

5-2

3

65
6

5-3

1

5-12

1

6-1-A

3

6-1-B

1

6-2

3

6-3

6-4-A

2

6-5

1

6-7-A

1

Hillsborough Bay

C-3 1 8-10

C-8-2 1 10-18

Upper Tampa Bay

10-1-A

3

10-2

1

10-3

1

10-12

1

10-13

1

11-3

2

11-5

2

11-16

1

1

11-28

26

12-2

1

12-3

1

12-6

3

12-7

5

12-8

1

12-9

1

12-10

1

12-12

2

12-13

5

12-14

6

4

12-15

2

12-16

2

1

13-1-A

93

13-3

8

13-5

3

1

13-6

1

13-8

1

13-10

10

13-13

3

454

Table 194.— Polydora socialls — Locality records and number
of individuals from survey stations, Tampa Bay,
Florida, 1963-69 (D-dredge, S-shovel, N-net)-
( continued)

Boca Ciega Bay

Stations

Individuals Stations

Individuals

D S N

D S N

BC-A

1

BC-A-1

2

BC-C

1

5

BC-G

1

BC-H

1

BC-M

1

1

11

BC-N

64

6

D-2

7

1

D-3

3

D-ll

5

D-12

6

D-13

9

D-17

4

3

D-18

19

D-19-A

1

D-22

8

D-2 3

8

D-24

4

D-25

3

2

D-26

31

PB-1

1

PB-4

3

6

PB-5

1

?

14-1-A

1

14-2

3

2

14-3

1

14-4

11

1

15-1

8

15-2

3

15-3

1

15-4

5

15-5

3

15-6

4

3

15-8

2

15-9

6

15-10

3

15-11

12

14

15-12

14

15-13

18

2

15-14

7

15-15

2

1

15-16

5

16-1

17

16-2

22

6

16-4

1

16-5

11

16-6

18

5

16-7

9

16-8

51

4

Terra Ceia Bay

E-l 5 E-5 1

E-2 5 S-6 4

E-3 2 E-7 1

E-4 3

455

Table 194. — Polydora socialls — Locality records and number
of individuals from survey stations, Tampa Bay,
Florida, 1963-69 (D-dredge, S-shovel, N-net)-
(continued)

Lower Tampa Bay

Stations

Individuals Stations

Individuals

D S N

D S N

14-17

1

15-18

1

15-20

7

15-21

1

15-23

1

15-24

5

15-25

1

15-26

9

15-29

19

15-30

2

15-31

21

15-32

1

16-9-B

16-11

2

16-13

15

16-15

6

14

16-16

1

16-17

1

2

16-19

1

16-20

1

4

16-21

2

16-22

1

16-25

47

16-26

1

16-27

14

17-2

56

2

17-5

2

11

17-6

7

9

17-7

4

3

17-8

4

17-9

2

17-10

1

456

Table 195. — Polydora socialls — Mean and range of observed
environmental factors from survey stations,
Tampa Bay, Florida, 1963-69

Number
Factor Mean Range observations

Water temperature (*C.)

Salinity (%„)

PK

Depth (m.)

Sediment type

Granules (wt. %)

Sands (wt. %)

Silts (wt. %)

Clay (wt. %)

CaC03 (wt. %)

Organic carbon (wt. %)

Organic nitrogen (wt. %)

Mean grain size,

total sample (0) 2.5 -1.0 to 7.1 120

Standard deviation,

total sample (0) 1.3 0*5 to 3.8 120

Skewness, total sample 0.3 -1.6 to 2.6 120

Kurtosis, total sample 9.6 -1.5 to 43.8 119

Mean grain size,

noncarbonate fraction (0) 3.0 1.4 to 8.7 117

Standard deviation,

noncarbonate fraction (0) 1.3 0.4 to 3.4 117

Mean grain size,

carbonate fraction (0) 0.1 -2.3 to 3.0 100

Standard deviation,

carbonate fraction (0) 1.3 0.2 to 2.9 100

23.7

12.8 to 33.2

125

29.7

3.7 to 35.1

125

8.0

7.1 to 8.4

119

1.1

l_l to 4.0

125

sand

shelly sand to
silty clay

120

3.3

0.0 to 44.5

120

91.1

11.2 to 99.9

120

3.5

0.0 to 44.4

120

2.1

0.0 to 65.9

119

15.5

0.6 to 75.1

120

0.6

0.01 to 6.9

9?

0.04

0.00 to 0.2

92

457

Polydora websteri Hartman, 1943
(Described and illustrated by Blake, 1971)

Specimens were collected at a total of 73 survey
stations in all areas of the Estuary, and at three inci-
dental localities in Old Tampa Bay and lower Tampa Bay
(table 196).

Average sediment type where the worm occurred was
poorly sorted, fine sand. The silt-clay fraction was
nearly eight percent, and organic carbon was one percent.
A few large shell fragments were present in most samples,
and average shell content was nearly 11 percent (table 197).

Twenty-three of the bottom samples contained algae
and one or more species of the five sea grasses found in
the Estuary.

A gravid specimen was collected in August, and newly
born young were found attached to dwelling tubes of adults
in May, July, August, September, and November.

P. websteri has been collected in the Gulf of Mexico
and is well known as a shell borer along the coasts of
eastern and western North America, and the Hawaiian
Islands.

458

Table 196. — Polydora websterl — Locality records and number
of individuals from survey stations, Tampa Bay,
Florida, 1963-69 (D-dredge, S-shovel, N-net)

Old Tampa Bay

Stations

Individuals

Stations

Individuals

A- 3

1

5-2

1

B-l

8

14

5-4

1

B-2

1

3

6-1-A

2

3-1-A

19

6-1-C

17

3-7

1

6-1-D

40

3-17

1

6-2

1

4-1

1

6-3

1

4

5-1-B

1

6-4-A

2

Hillsborough Bay

c

35

8-10

1

C-l

5

9-1

23

C-2

43

16

9-3

76

112

C-3

45

36

9-4

5

18

C-4

50

9-8

3

C-5

1

1

9-9

5

48

C-6

13

10-15

10

7-1

C

1

10-16

1

7-3

6

24

10-18

5

8-2

1

10-19

1

8-6

68

10-20

1

8-8

5

63

10-22

5

73

8-9

596

89

10-23

4 21

Upper Tampa Bay

10-1-A

11-22

11-28

11-28-1
11-28-2
12-14

273
2

459

Table 196. — Polydora websterl — Locality records and number
of individuals from survey stations, Tampa Bay,
Florida, 1963-69 (D-dredge, S-shovel, N-net)--
(continued)

Boca Ciega Bay

Stations

Individuals Stations

Individuals

D S N

D S N

BC-I

1

BC-M

14

BC-N

1

1

D-2

1

D-9

7

D-18

1

D-2 5

9

PB-1

1

3

PB-4

783

PB-5

1

3

15-1

3

15-4

17

15-6

2

15-8

1

15-11

15-14

2

15-15

16-2

16-4

16-5

16-7

2

1

1

18

Terra Ceia Bay

E-l

1

Lower Tampa Bay

14-5
15-27

1 16-10
1

3

460

Table 197. — Polydora websteri — Mean and range of observed
environmental factors from survey stations,
Tampa Bay, Florida, 1963-69

Factor

Mean

Range

Number
observations

Water temperature (*C.)
Salinity (%0)

PH

Depth (m.)
Sediment type

Granules (wt. %)

Sands (wt. %)

Silts (wt. %)

Clay (wt. %)

CaC03 (wt. %)

Organic carbon (wt. %)

Organic nitrogen (wt. %)

Mean grain size,
total sample (0)

Standard deviation,
total sample (0)

Skewness, total sample

Kurtosis, total sample

Mean grain size,
noncarbonate fraction (0)

Standard deviation,
noncarbonate fraction (0)

Mean grain size,
carbonate fraction (0)

Standard deviation,
carbonate fraction (0)

28.3

15.5 to 33.8

54

24.4

15.6 to 34.9

54

7.9

6.7 to 8.5

47

0.8

l_l to 2.3

54

sand

shelly sand to
silty sand

51

4.2

0.0 to 72.9

51

90.3

27.1 to 99.9

51

6.1

0.0 to 13.4

51

1.8

0.0 to 11.1

51

10.6

0.5 to 75.6

50

1.0

0.1 to 4.8

24

0.06

0.01 to 0.2

24

2.6

-1.9 to 4.2

1.4 0*5 to 2.7

0.7 -0.8 to 3.4

11.3 -1.5 tc 73.5

3.2 2.3 to 8.7

1.6 0.5 to 2.5

-0.5 -2.6 to 2.2

1.4 0.2 to 2.9

50

50

50
50

49

49
49
49

461

Prlonospio cirrobranchlata Day, 1961
(Described and illustrated by Day, 1967)

Collections of this species came from a total of 69
survey stations in all areas of the Estuary except lower
Tampa Bay. P. cirrobranchlata was recorded in that area
only from an incidental collection made near Mullet Key
(table 198).

Average sediment type at dredge and shovel stations
was poorly sorted, very fine sand that bordered on the
silty sand category. Silt and clay content was over 18
percent and organic carbon was about one percent. The
shell content was over 12 percent, and some large fragments
were present (table 199).

Algae were found in about 10 percent of the bottom
samples, together with one or more sea grasses that included
manatee, shoal, and turtle grass.

No gravid individuals were collected, but one juvenile
was found in August.

Previously unrecorded from the Gulf of Mexico, P.
cirrobranchlata is known from the coast of North Carolina
and Africa.

462

Table 198. — Prionospio clrrobranchiata — Locality records

and number of individuals from survey stations,
Tampa Bay, Florida, 1963-69 (D-dredge, S-
shovel, N-net)

Old Tampa Bay

Stations

Ind

iv:

Lduals

Stations

Individuals

0

S

N

D

S

N

A

1

4-16

1

B

1

4-18-B

1

1-3

2

2

5-1-B

8

1

1-4

13

1

5-3

3

1-5

1

5-4

2

3-1-A

2

5-6

2

4-2

3

5-8

1

4-6

1

5-9

1

4-7

2

5-11

1

4-8

1

5-12

13

4-11

1

5-13

1

4-13

7

6-4-A

1

4-14

3

6-5

24

4-15

5

6-6

14

Hillsborough

Bay

C-3

3

10-17

15

10-16

5

5

10-19

9

8

Upper

Tampa

Bay

10-4

16

11-14

13

10-6

2

11-15

43

11-2

1

11-16

8

11-4

13

11-17

6

11-5

3

11-18

7

1

11-6

12

11-19

5

1

11-7

3

11-20

16

11-8

8

11-22

17

10

11-9

42

11-24

1

11-11

3

11-26

1

11-12

7

11-28

1

11-13

2

463

Table 198. — Prlonospio cirrobranchiata — Locality records

and number of individuals from survey stations,
Tampa Bay, Florida, 1963-69 (D-dredge, S-
shovel, N-net)-(continued)

Boca Ciega Bay

Stations

Individuals Stations

Individuals

D S N

D S N

BC-N
D-ll
D-25
15-1
15-3
15-4
15-5

15-6

15-8

15-11

15-12

15-17

16-6

1
5

1

1

10

Terra Ceia Bay

E-3

464

Table 199. — Prionosplo cirrobranchiata — Mean and range of
observed environmental factors from survey
stations, Tampa Bay, Florida, 1963-69

Factor

Mean

Range

Number
observations

Water temperature (*C.)
Salinity (%. )

PH

Depth (m. )

Sediment type

Granules (wt. %)

Sands (wt. %)

Silts (wt. %)

Clay (wt. %)

CaC03 (wt. %)

Organic carbon (wt. %)

Organic nitrogen (wt. %)

Mean grain size,
total sample (0)

Standard deviation,
total sample (0)

Skewness, total sample

Kurtosis, total sample

Mean grain size,
noncarbonate fraction (0)

Standard deviation,
noncarbonate fraction (0)

Mean grain size,
carbonate fraction (0)

Standard deviation,
carbonate fraction (0)

28.8

17.5

to 33.8

64

26.0

21.0

to 34.3

64

8.0

7.0

to 8.3

59

1.6

&■

to 4.0

64

sand

shelly sand to
clayey silt

63

1.8

0.0

to 41.5

63

78.9

4.6

to 100

63

10.4

0.0

to 52.6

63

7.7

0.0

to 50.3

63

12.3

0.6

to 66.0

63

0.9

0.1

to 8.5

35

0.1

0.00 to 0.3

35

3.4

1.5

0.7

11.9

3.2

1.5

-0.3

1.5

0.9 to 7.3

0.4 to 3.5

-0.8 to 3.4

-0.9 to 73.5

1.7 to 9.0

0.5 to 2.2

-2.5 to 2.4

0.4 to 2.9

63

63
63
63

63

63
61

61

465
Prionospio heterobranchla texana Hartman, 1951

Except for Hillsborough Bay, specimens were collected
in all areas of the Estuary. Fifty-six, or about 78 per-
cent, of the 71 survey stations where the worm was found
were located in Boca Ciega Bay and lower Tampa Bay. All
six of the incidental collections were also located in
those two areas (table 200) .

Poorly sorted, fine sand was the bottom type where
specimens were generally found, but several collections
came from softer sediments that contained large amounts of
silt and clay. The average amount of silt and clay was
about seven percent, and organic carbon was nearly one per-
cent. Most of the shell in sediment samples was in the
sand size class (table 201).

In the 28 bottom samples that contained vegetation,
algae were consistently present, and some contained one or
more of the five sea grasses found in the Estuary.

A gravid specimen was collected in November, and
juvenile worms were found in September and October.

Prionospio h. texana is known only from the Gulf of
Mexico.

466

Table 200. — Prlonosplo heterobranchia texana — Locality

records and number of individuals from survey
stations, Tampa Bay, Florida, 1963-69 CD-
dredge, S-sbovel, N-net)

Old Tampa Bay

Stations

Individuals

Stations

Individuals

B-2

8

5-2

4

5-4

4

6-1-A

2

6-1-B

2

6-1-C
6-4-A
6-7-A
6-8

D-2

1

D-3

2

1

D-5

10

D-7

1

D-10

1

D-ll

1

8

D-17

2

D-18

1

D-19-A

4

D-2 3

2 4

D-25

6

D-26

1

PB-1

140

PB-4

2

17

14-4

1

15-1

1

20

4
3

Upper Tampa Bay

11-3

11-20

11-22

1
1

13-8
1 13-13

1

1

Boca Ciega 3ay

15-2

5

15-3

3

15-4

1

15-10

2

15-12

1

15-15

5

13

15-16

21

15-17

6

16-1

4 5

16-2

15

16-3

78

16-4

62

16-5

164

16-6

9

16-7

34

16-8

1

Terra Ceia Bay

E-6

E-8

467

Table 200. — Prionospio heterobranchia texana — Locality

records and number of individuals from survey
stations, Tampa Bay, Florida, 1963-69 CD-
dredge, S-shovel, N-net)-(continued)

Lower Tampa Bay

Stations

Individuals Stations

Individuals

D S N

D S N

14-6

4

15-18

18

15-23

1

15-24

4

15-29

22

15-31

16-10

2

16-13

23

16-14

5

16-15

6

16-16

13

16-17

7

16-20

1

16-21

3

16-22

3

16-25

17-2

12

17-4

5

17-5

3

17-6

10

17-7

2

18-3

43

18-4

1

468

Table 201. — Prionospio heterobranchia texana — Mean and

range of observed environmental factors from
survey stations, Tampa Bay, Florida, 1963-69

Factor

Water temperature (*C.)

Salinity (%.)

PH

Depth (m.)

Sediment type

Granules (wt. %)

Sands (wt. %)

Silts (wt. %)

Clay (wt. %)

CaC03 (wt. %)

Organic carbon (wt. %)

Organic nitrogen (wt. %)

Mean grain size,

total sample (0) 2.6 0.6 to 8.8 62

Standard deviation,

total sample (0) 1.3 0.5 to 2.7 62

Skewness, total sample 0.3 -1.0 to 2.6 62

Kurtosis, total sample 8.4 -0.6 to 43.8 62

Mean grain size,

noncarbonate fraction (0) 3.1 1.9 to 8.7 59

Number

Mean

Ranqe

observations

25.1

12.8

to

34.1

66

31.4

24.1

to

34.9

66

8.1

7.8

to

8.3

64

1.0

Zi

to

4.0

66

sand

sand

to

silt

62

2.4

0.0

to

13.4

62

92.3

5.5

to

99.8

62

4.7

0.1

to

89.4

62

2.1

0.0

to

65.9

62

16.3

0.7

to

68.0

62

0.9

0.1

to

6.9

43

0.1

0.00 to 1.2

43

Standard deviation,

noncarbonate fraction (0) 1.4 0.6 to 5.2 59

Mean grain size,

carbonate fraction (0) 0.1 -1.9 to 1.8 53

Standard deviation,

carbonate fraction (0) 1.2 0.7 to 2.6 53

1.3

0.5

to

2.7

0.3

-1.0

to

2.6

8.4

-0.6

to

43.8

3.1

1.9

to

8.7

1.4

0.6

tc

5.2

0.1

-1.9

to

1.8

1.2

0.7

to

2.6

469

Scolelepls squamata (Muller, 1806)
(Described and illustrated by Day, 1967)

Specimens were collected at a total of 43 survey
stations in all areas of the Estuary, and at three inci-
dental localities in Old Tampa Bay, Boca Ciega Bay, and
lower Tampa Bay (table 202).

Except for one station in silty sand, all collections
came from medium to very fine sand. Average shell content
of the sediments was about 11 percent, the silt and clay
fraction was less than three percent, and organic carbon
was under five percent (table 203) .

Twenty-two of the bottom samples contained algae and
some also had shoal grass, manatee grass, or turtle grass.

A gravid specimen was collected in December and a
juvenile was found in October.

S. squamata has been collected in the Gulf of Mexico
and is known also from temperate and tropical waters of
the Atlantic and eastern Pacific.

470

Table 202. — Scolelepls squamata — Locality records and

number of individuals from survey stations,
Tampa Bay, Florida, 1963-69 (D-dredge, S-
shovel, N-net)

Old Tampa Bay

D-28 1

10-0 129

10-6 1

10-12 2

11-1 1

11-28 1

Stations

Individuals

Stations

Individuals

D

S N

D S N

4-20

6-1-D

17

1

6-4-A
6-8

1

2

Hillsborough

Bay

9-1

2

Upper Tampa

Bay

11-28-1

1

11-28-2

1

12-16

1

13-1-A

11

13-12

2

13-13

8

Boca Ciega Bay

BC-M

D-2 1

15-2 2

15-7 10

15-8 1

15-10

239

15-11

9

15-12

2

16-6

1

16-7

15

15-9

2

Terra Ceia Bay

E-2
E-4

2

1

E-5
E-6

1
2

471

Table 202. — Scolelepls squamata — Locality records and

number of Individuals from survey stations,
Tampa Bay, Florida, 1963-69 (D-dredge, S-
shovel, N-net)-(continued)

Lower Tampa Bay

Stations

Individuals Stations

Individuals

D S N

D S N

14-17

1

14-19

2

14-20

5

15-18

1

15-19

6

15-20

4

15-26

1

16-15

1

16-28

17-2

2

18-4

1

472

Table 203. — Scolelepis squamata — Mean and range of observed
environmental factors from survey stations,
Tampa Bay, Florida, 1963-69

Factor

Mean

!

?anqe ob

Number

servations

Water temperature (*C.

)

24.2

12.8

to

34.1

41

Salinity (%. )

28.6

17.3

to

34.5

41

PH

8.1

7.7

to

8.3

39

Depth (m.)

0.7

D-

to

4.0

42

Sediment type

sand

shelly sand to
silty sand

40

Granules (wt. %)

2.5

0.0

to

29.4

40

Sands (wt. %)

95.2

70.6

to

99.9

40

Silts (wt. %)

1.8

0.0

to

22.1

40

Clay (wt. %)

0.5

0.0

to

5.2

40

CaC03 (wt. %)

11.1

0.5

tc

66.0

39

Organic carbon (wt. %)

0.4

0.1

to

1.4

32

Organic nitrogen (wt.

%)

0.03

0.00 tc

i 0.2

32

Mean grain size,
total sample (0)

2.4

0.1

to

4.1

39

Standard deviation,
total sample (0)

1.1

0.5

tc

2.0

39

Skewness, total sample

0.2

-1.2

to

2.2

39

Kurtosis, total sample

13.0

-1.0

to

35.7

3 9

Mean grain size,
noncarbonate fraction

(0)

2.9

1.8

tc

3.9

40

Standard deviation,
noncarbonate fraction

(0)

1.4

0.4

to

3.2

40

Mean grain size,
carbonate fraction (0)

0.2

-2.2

to

2.1

38

Standard deviation,
carbonate fraction (0)

1.3

0.6

to

1.9

38

47 3

Spio setosa Verrill, 1873
(Described and illustrated by Hartman, 1945)

Hillsborough Bay was the only area of the Estuary not
represented among the 43 survey stations where this worm
was collected. Incidental collections came from two lo-
calities in Boca Ciega Bay and one in Old Tampa Bay (table
204).

Sand was the only sediment type in which the worm was
found. Average shell content was about 19 percent, but
few large fragments were present. Most bottom samples had
very little silt and clay, and less than one percent organic
carbon (table 205).

Algae, and manatee and turtle grass were the plants
found in 12 of the 40 dredge and shovel samples.

A juvenile specimen was collected in July, but no
gravid worms were noted.

S. setosa occurs along the eastern coast of the
United States, but has not been previously reported for
the Gulf of Mexico.

474

Table 204. — Splo setosa — Locality records and number of
individuals from survey stations, Tampa Bay,
Florida, 1963-69 (D-dredge, S-shovel, N-net)

Old Tampa Bay

Stations

Individuals Stations

Individuals

D S N

D S N

4-16 1

5-5 1

5-7 14

5-8 2

5-9 6

14-7

1

15-18

53

15-20

1

15-21

1

15-28

1

15-29

1

15-31

1

16-13

8

16-15

12

16-16

61

16-17

11

5-12

1

5-13

5

6-1-B

6-3

2

6-5

25

6-6

6

5-11

4

6-6

6

1

Upper Tampa Bay

10-2

10-3
11-3

4
2

12-10
2 13-11

1

1

1

Boca Ciega Bay

D-22
D-25

1

16-6
1 16-7

6
3

Terra Ceia Bay

E-8

2

Lower Tampa Bay

16-21

1

17-2

5

17-3

13

17-4

39

17-6

6

17-7

6

17-8

13

17-9

2

17-10

13

18-4

1

475

Table 205. — Spio setosa — Mean and range of observed

environmental factors from survey stations,
Tampa Bay, Florida, 1963-69

Number
Factor Mean Range observations

Water temperature (*C.) 25.6 15.0 to 33.8 40

Salinity (%.) 29.5 22.4 to 34.6 40

pH 8.0 7.7 to 8.3 40

Depth (m.) 1.5 /\ to 4.0 40

Sediment type sand — 3 7

Granules (wt. %) 1.8 0.0 to 8.9 37

Sands (wt. %) 96.4 87.8 to 100 37

Silts (wt. %) 1.3 0.0 to 8.6 37

Clay (wt. %) 0.6 0.0 to 3.6 37

CaC03 (wt. %) 19.3 0.7 to 85.2 37

Organic carbon (wt. %) 0.5 0.02 to 3.3 28

Organic nitrogen (wt. %) 0.04 0.01 to 0.2 28

Mean grain size,

total sample (0) 2.2 0.5 to 3.3 37

Standard deviation,

total sample (0) 1.1 0.4 to 2.0 37

Skewness, total sample 0.5 -1.3 to 3.6 37

Kurtosis, total sample 17.8 3.2 to 76.3 37

Mean grain size,

noncarbonate fraction (0) 3.0 1.4 to 8.4 37

Standard deviation,

noncarbonate fraction (0) 1.4 0.6 to 3.2 37

Mean grain size,

carbonate fraction (0) -0.1 -1.8 to 1.7 30

Standard deviation,

carbonate fraction (0) 1.2 0.4 to 2.1 30

1.1

0.4

to

2.0

0.5

-1.3

to

3.6

17.8

3.2

to

76.3

3.0

1.4

to

8.4

1.4

0.6

to

3.2

-0.1

-1.8

to

1.7

1.2

0.4

to

2.1

476

Splophanes borobyx (Claparede, 1870)
(Described and illustrated by Day, 1967)

Specimens were collected at a total of 21 survey
stations in all areas of the Estuary except Hillsborough
Bay. Two incidental collections were recorded from Boca
Ciega Bay and one from lower Tampa Bay. More than one-
half of the station records for S. bombvx were from Boca
Ciega Bay alone (table 206).

All specimens were collected in sand. As an average,
the sand was fine and poorly sorted, and contained nearly
13 percent shell. The amount of silt and clay was under
five percent, and organic carbon was nearly one percent
(table 207).

Algae were recorded in one-third of the dredge and
shovel samples, and at some, shoal grass, turtle grass,
or manatee grass were also noted.

Neither juvenile nor gravid specimens were collected.

This species has a world-wide distribution in temper-
ate and tropical waters, and has been collected in the
Gulf of Mexico. r.

477

Table 206. — Spiophanes bombyx — Locality records and num-
ber of individuals from survey stations,
Tampa Bay, Florida, 1963-69 (D-dredge, S-
shovel, N-net)

Old Tampa

Bay

Stations

Individuals

Stations

Individuals

D

S

N

D S N

3-11
4-19

1

1

6-7-A

1

Upper Tampa Bay

11-5

1

12-5

1

Boca Ciega

Bay

D-ll
D-22
D-23
D-25
PB-1
PB-5

1

2

1

1

3
1

1
1

15-6
15-8
16-1
16-6
16-7

1

1

4
6

1

Terra Ceia

Bay

E-5

3

Lower Tampa Bay

16-20
16-22

1
3

16-27

17-2

4
1

478

Table 207. — Spiophanes bombyx — Mean and range of observed
environmental factors from survey stations,
Tampa Bay, Florida, 1963-69

Factor

Mean

Janqe

Number
observations

Water temperature (

•c,

.)

24.6

14.5

to

33.2

22

Salinity (%„)

30.5

21.5

to

34.5

22

PH

8.1

7.6

to

8.3

22

Depth (m.)

1.1

n

to

4.0

22

Sediment type

sand

—

22

Granules Iwt.

%)

1.0

0.0

to

5.2

22

Sands (wt. %)

94.5

88.9

to

99.2

22

Silts (wt. %)

3.3

0.2

to

8.6

22

Clay (wt. %)

0.8

0.1

to

2.3

22

CaC03 (wt. %)

12.9

1.2

to

66.0

22

Organic carbon

(wt.

%)

0.9

0.1

to

6.9

14

Organic nitrog

en (w

t.

%)

0.04

0.0]

. to

0.2

14

Mean grain size,
total sample (0)

Standard deviation,
total sample (0)

Skewness, total sample

Kurtosis, total sample

Mean grain size,
noncarbonate fraction (0)

Standard deviation,
noncarbonate fraction (0)

Mean grain size,
carbonate fraction (0)

Standard deviation,
carbonate fraction (0)

2.7 1.9 to 3.4

1.2

0.6

to

1.9

0.5

-0.6

to

1.9

10.0

0.6

to

38.8

2.9

1.9

t:o

3.7

1.5

0.5

to

3.2

-0.4 -2.5 to 1.3
1.3 0.7 to 2.9

22

2 2
22
22

19

19

19

19

479

Streblosplo benedlcti Webster, 1879
(Described and illustrated by Hartman, 1969)

This minute spionid was recorded from one incidental
locality in lower Tampa Bay (silt, in a suspended, sedi-
ment collector located in Bishop Harbor) and one in Hills-
borough Bay. Otherwise, S. benedlcti was found at a
total of 74 survey stations in all areas of the Estuary,
except lower Tampa Bay. Areas of greatest abundance were
Hillsborough and Boca Ciega Bays. Dredge hauls containing
more than 200 specimens were taken at several stations, and
one collection of 1,044 worms was recorded at station 8-9
in Hillsborough Bay (table 208).

Sediment data show that the average bottom type occu-
pied by S. benedicti was poorly sorted, fine sand with
nearly 12 percent shell. At more than 15 percent, the silt
and clay fraction was nearly large enough to classify the
bottom type as silty sand (table 209).

Algae were present in 18 of 65 dredge and shovel
samples, and at some of these there were also shoal, manatee
or turtle grass.

Neither gravid nor juvenile specimens were seen.
S. benedicti has been collected in the Gulf of Mexico
and is also known to occur on Atlantic and Pacific coasts
of the United States.

480

Table 208. — Streblospio benedicti — Locality records and
number of individuals from survey stations,
Tampa Bay, Florida, 1963-69 (D-dredge, S-
shovel, N-net)

Old Tampa Bay

Stations

In

divi

.duals

Stations

Indivi

duals

D

S

N

D

S

N

A- 3

25

5-1-B

13

B

1

5-2

7

3-17

1

Hillsborough

Bay

C

2

8-7

10

C-l

6

8-8

3

1

C-2

139

1

8-9

1044

10

C-3

14

107

8-10

36

C-4

23

9-2

10

C-5

10

9-3

50

10

C-6

8

23

9-4

10

10

C-9

1

9-7

1

10

7-1

968

10

9-8

10

7-2

12

9-9

42

10

7-3

302

1

10-19

10

8-2

6

10

10-22

3

10

8-3

2

10

10-23

1

8-4

10

Upper

Tampa

Bay

11-28

2

481

Table 208. — Streblospio benedlctl — Locality records and
number of Individuals from survey stations,
Tampa Bay, Florida, 1963-69 (D-dredge, S-
shovel, N-net)-(continued)

Boca Ciega Bay

Stations

Individuals Stations

Individuals

D S N

D S N

BC-A

20

2

BC-H

9

BC-I

1

D-l

26

D-2

17

D-3

1

D-5

10

D-7

1

D-9

6

D-10

13

D-13

9

6

D-l 4

3

1

D-l 7

2

1

D-19-A

1

D-19-B

71

D-20

250

1

D-21

254

102

D-2 2

185

D-2 4

3

PB-1

3

PB-4

6

PB-5

1

15-1

41

15-2

1

15-3

1

15-4

163

15-5

84

15-6

9

15-8

56

15-9

2

15-10

2

15-11

59

15-12

55

15-13

51

15-15

15-17

2

16-1

2

16-2

1

16-5

6

16-8

3

12

Terra Ceia Bay

E-2

482

Table 209. — Streblospio benedicti — Mean and range of ob-
served environmental factors from survey
stations, Tampa Bay, Florida, 1963-69

Factor

Mean

Range

Number
observations

Water temperature (*C.)

Salinity (%.)

pH

Depth (m. )

Sediment type

Granules (wt. %)

Sands (wt. %)

Silts (wt. %)

Clay (wt. %)

CaCO, (wt. %)

Organic carbon (wt. %)

Organic nitrogen (wt. %)

Mean grain size,
total sample (0)

Standard deviation,
total sample (0)

Skewness, total sample

Kurtosis, total sample

Mean grain size,
noncarbonate fraction (0)

Standard deviation,
noncarbonate fraction (0)

Mean grain size,
carbonate fraction (0)

Standard deviation,
carbonate fraction (0)

26.7

14.5 to 32.0

65

27.2

15.6 to 34.8

65

8.0

6.7 to 8.5

61

0.8

£1 to 2.0

65

sand

shelly sand to
silty clay

64

2.1

0.0 to 46.2

64

81.7

5.0 to 99.9

64

10.8

0.1 to 89.4

64

4.8

0.0 to 46.5

64

11.6

0.6 to 69.0

64

0.8

0.1 to 4.8

33

0.05

0.01 to 0.2

33

2.8 -0.8 to 7.8 64

1.5 0.5 to 2.6 64

0.3 -1.6 to 2.2 64

8.0 -1.1 to 25.5 64

3.1 1.8 to 8.7 62
1.5 0.4 to 2.5 62

-0.2 ^2.6 to 1.4 62

1.4 0.4 to 2.9 62

483
Pseudopolydora sp.
This undetermined spionid is about 5 mm. long by 0.3
mm. wide, and looks very much like Polydora cltrona (see
Hartman, 1969). Characteristic setae have been illustrated
(figure 9, A, B) .

Sepcimens were collected at a total of 60 survey sta-
tions throughout the Estuary, except for Terra Ceia Bay.
Hillsborough Bay was the only area where an incidental
collection was made. This worm was extremely plentiful at
station 11-17 in upper Tampa Bay, where 1,098 specimens
were collected in a single dredge haul (table 210).

Average bottom type was very fine, poorly sorted sand
that contained some large shell fragments, and about 13
percent shell altogether. The percentage of silt and clay
was nearly enough to designate sediment type as silty sand,
rather than sand. The weight percentage of organic carbon
was under one (table 211) .

Only eight of 58 bottom samples contained vegetation.
Algae were present, and also found in some were shoal or
turtle grass.

No gravid specimens were noted, but juveniles were
collected in August, September, and December.

484

Table 210. — Pseudopolydora sp. — Locality records and number
of individuals from survey stations, Tampa Bay,
Florida, 1963-69 (D-dredge, S-shovel, N-net)

Old Tampa Bay

Stations

Individuals

Stations

Individuals

B-2

1-4

94

3-4

5

3-5

1

3-7

3

3-9

1

3-17

4-2

5

4-3

6

4-4

21

4-6

74

4-7

64

4-8

23

4-9

2

4-10

1

4-12

35

4-13

399

4-14

16

4-15

488

4-16

18

4-18-A

4-19

4

5-1-B

27

5-2

34

5-3

4

6-2

18

6-7-A

Hillsborough Bay

9-3

10-16

10-17

72

Upper Tampa Bay

11-7

1

11-8

4

11-9

215

11-11

4

11-12

11

11-13

1

11-14

1

11-15

167

11-16

1

11-17

1098

11-22

4

11-25

2

11-27

1

12-14

7

485

Table 210. — Pseudopolydora sp. — Locality records and number
of individuals from survey stations, Tampa Bay,
Florida, 1963-69 (D-dredge, S-shovel, N-net)-
(continued)

Boca Ciega Bay

Stations

Individuals Stations

Individuals

D S N

D S N

D-9

1

D-19-B

3

D-20

1

D-22

4

D-25

15-3

15-4

10

15-5

7

15-8

4

15-9

15-11

7

15-17

2

16-5

Lower Tampa Bay

14-5
16-15

1
1

17-4

8

486

Table 211. — Pseudopolydora sp. — Mean and range of observed
environmental factors from survey stations,
Tampa Bay, Florida, 1963-69

Factor

Mean

Range

Number
observations

Water temperature (*C.)

Salinity (%„)

PH

Depth (m. )

Sediment type

Granules (wt. %)

Sands (wt. %)

Silts (wt. %)

Clay (wt. %)

CaC03 (wt. %)

Organic carbon (wt. %)

Organic nitrogen (wt. %)

Mean grain size,
total sample (0)

Standard deviation,
total sample (0)

Skewness, total sample

Kurtosis, total sample

Mean grain size,
noncarbonate fraction (0)

Standard deviation,
noncarbonate fraction (0)

Mean grain size,
carbonate fraction (0)

Standard deviation,
carbonate fraction (0)

28.2

15.5 to 33.2

58

25.6

18.3 to 34.4

58

8.0

7.1 to 8.3

47

1.6

/l to 4.0

58

sand

shelly sand to
silty clay

57

1.9

0.0 to 41.5

57

79.1

5.0 to 99.4

57

11.1

0.0 to 51.0

57

8.6

0.0 to 47.0

57

12.9

0.7 to 66.0

57

0.7

0.1 to 2.3

28

0.06

0.00 to 0.2

28

3.5 0.9 to 7.2 57

1.6 0.6 to 3.5 57
0.6 -0.8 to 2.2 57
7.8 -1.3 to 41.2 57

3.1 1.7 to 4.1 57

1.5 0.5 to 2.3 57

-0.3 -2i'5 to 2.4 56

1.4 0.7 to 2.7 56

487
Family MAGELONIDAE Cunningham and Ramage, 1888
The magelonlds constitute a small family of sediment
dwellers that are found in temperate and tropical seas
throughout the world. They are deposit feeders, and secure
food by means of adhesive filaments on their long palps.

A single species, Magelona pettiboneae. was found in
Tampa Bay. A larger species, Magelona rioiai. occurs out-
side the Estuary, along St. Petersburg Beach and other

island beaches.

Magelona pettiboneae Jones, 1963

Specimens were collected at a total of 71 survey sta-
tions throughout the Estuary, and at four incidental local-
ities in upper and lower Tampa Bay as well as Boca Ciega
Bay (table 212).

M. pettiboneae was found mostly in sediments of poorly
sorted, fine sand that had some large shell fragments and
an average shell content of less than 10 percent. Average
silt and clay content was less than four percent, but
organic carbon was nearly one percent (table 213).

Algae, and one or more of all the sea grasses found in
the Estuary were noted in 42 of the 76 bottom samples.

No gravid specimens were seen, but juvenile worms were
collected in June through December.

M. Pettiboneae has been collected only in the eastern
Gulf of Mexico.

488

Table 212. — Maqelona pettiboneae — Locality records and
number of individuals from survey stations,
Tampa Bay, Florida, 1963-69 (D-dredge, S-
shovel, N-net)

Old Tampa Bay

Stations Individuals Stations Individuals

5-4 5

5-5 1

6-1-C 3

6-1-D 20

6-7-A 4

B-2

9

3-2

2

4-5

3

4-10

1

5-1-A

1

Hillsborough Bay

10-15

1

Upper Tampa Bay

D-28

24

10-1-A

2

10-3

2

10-4

1

10-12

10

10-13

3

10-14-A

3

4

11-1

5

11-2

2

11-28

26

11-28-1

37

11-28-2

2

12-1

7

12-3

1

13-1-A

11

13-1-B

16

13-2

1

13-13

I

489

Table 212. — Magelona pettlboneae — Loeality records and
number of individuals from survey stations,
Tampa Bay, Florida, 1963-69 (D-dredge, S-
shovel, N-net)-(continued)

Boca

Ciega

Bay

Stations

Individuals

Stations

Individuals

D

S

N

D

S N

BC-C

1

15-6

2

BC-N

2

15-9

1

D-2

9

15-10

1

D-5

1

15-15

1

D-ll

13

47

15-16

1

D-19-A

8

16-1

6

D-19-B

1

16-2

3

D-2 3

2

16-3

8

D-25

12

16-4

16

PB-1

1

16-5

1

PB-4

1

8

16-6

1

14-1-A

1

16-7

1

15-2

51

16-8

1

15-3

5

Terra

Ceia

Bay

E-6

44

Lower

Tampa Bay

15-23

1

16-25

5

16-9-A

21

16-26

1

16-9-B

19

17-2

6

16-10

1

17-6

10

16-13

3

17-7

15

16-20

1

17-8

7

16-21

1

17-9

3

490

Table 213. — Maqelona pettiboneae — Mean and range of ob-
served environmental factors from survey
stations, Tampa Bay, Florida, 1963-69

Number
Factor Mean Range observations

Water temperature CC.)

Salinity (%„)

pH

Depth (m.)

Sediment type

Granules (wt. %)

Sands (wt. %)

Silts (wt. %)

Clay (wt. %)

CaC03 (wt. %)

Organic carbon (wt. %)

Organic nitrogen (wt. %)

Mean grain size,

total sample (0) 2.4 -4.0 to 4.3 74

Standard deviation,

total sample (0) 1.2 0.5 to 2.8 74

Skewness, total sample 0.4 -1.4 to 3.6 74

Kurtosis, total sample 11.9 -0.2 to 76.3 73

Mean grain size,

noncarbonate fraction (0) 3.1 1.4 to 8.7 70

25.8

12.8

to 33.8

76

29.3

18.5

to 35.1

76

8.0

7.4

to 8.4

69

0.7

D-

to 4.0

76

sand

shelly sand to
clayey sand

75

2.5

0.0

to 79.7

75

93.3

20.2

to 99.9

75

2.5

0.0

to 15.8

75

0.9

0.0

to 14.3

75

9.4

0.6

to 49.5

74

0.9

0.1

to 6.9

53

0.05

0.00 to 0.3

53

Standard deviation,

noncarbonate fraction (0) 1.4 0.5 to 3.2 70

Mean grain size,

carbonate fraction (0) -0.1 -2.1 to 2.5 61

Standard deviation,

carbonate fraction (0) 1.2 0.0 to 3.1 61

1.2

0.5

to

2.8

0.4

-1.4

to

3.6

11.9

-0.2

to

76.3

3.1

1.4

to

8.7

1.4

0.5

to

3.2

-0.1

-2.1

to

2.5

1.2

0.0

to

3.1

491
Family POECILOCHAETIDAE Hannerz, 1956
This small family contains less than a dozen species,
which are sparingly distributed and rarely collected in
temperate and tropical waters. Poecllochaetids inhabit
tubes of sand and silt, and feed on bottom deposits and
suspended detritus by means of long, grooved palps.
A single species, Poecilochaetus lohnsoni. was
collected in Tampa Bay.

Poecilochaetus johnsonl Hartman, 1939
(Described and illustrated by Hartman, 1969)

Individuals were collected in all areas of the Estuary
at a total of 26 survey stations and at two incidental
localities in Boca Ciega Bay and lower Tampa Bay. At sta-
tion 6-2, 24 specimens were collected in a single dredge
haul (table 214).

P. iohnsoni was found only in sand. As an average, the
sand was fine and poorly sorted and contained about 15 per-
cent shell. Silt and clay content never exceeded 10 percent,
and organic carbon was less than one percent (table 215).

Slightly more than one-third of the bottom samples
contained algae, and one had turtle grass as well.

A gravid specimen was collected in October, but no
juvenile worms were found.

492
P. johnsonl was described from collections in southern
California, and is otherwise known from the Gulf of Mexico
and North Carolina.

493

Table 214. — Foecllochaetus johnsoni — Locality records and
number of individuals from survey stations,
Tampa Bay, Florida, 1963-69 (D-dredge, S-
shovel, N-net)

Old Tampa Bay

Stations

Individuals Stations

Individuals

D S N

D S N

4-19
5-3

4 6-2
2 6-3

24

10

Hillsborough Bay

10-15

1

10-9

1

10-12

2

10-13

1

11-3

1

11-5

1

Upper Tampa Bay

Boca Ciega Bay

10 11-16

12-1 1

13-1-A 1

13-4 6

BC-N

1

D-2

2

D-24

PB-1

2

15-1

12

15-8

1

15-9

15-13

1

Lower Tampa Bay

14-5
15-29

1

1

16-14
17-2

2
2

494

Table 215. — Poecllochaetus johnsoni — Mean and range of ob-
served environmental factors from survey sta-
tions, Tampa Bay, Florida, 1963-69

Factor

Water temperature (°C.)

Salinity (%.)

pH

Depth (m.)

Sediment type

Granules (wt. %)

Sands (wt. %)

Silts (wt. %)

Clay (wt. %)

CaC03 (wt. %)

Organic carbon (wt. %)

Organic nitrogen (wt. %)

Mean grain size,

total sample (0) 2.3 0.6 to 3.1 21

Standard deviation,
total sample (0)

Skewness, total sample

Kurtosis, total sample

Mean grain size,
noncarbonate fraction (0)

Standard deviation,
noncarbonate fraction (0)

Mean grain size,
carbonate fraction (0)

Standard deviation,
carbonate fraction (0)

Number

Mean

Ranc

le

observations

27.1

18.5

to

31.8

23

28.1

18.5

to

34.5

23

8.0

7.6

to

8.3

20

1.2

D-

to

4.0

23

sand

~

21

2.3

0.0

to

7.9

21

95.3

88.4

to

99.8

21

1.6

0.0

to

6.1

21

0.6

0.0

to

2.6

21

14.9

0.6

to

68.0

21

0.6

0.1

to

3.3

11

0.04

0.00 tc

' 0.2

11

1.1

0.5

to

1.9

21

0.2

-1.3

to

1.9

21

12.6

0.1

to

41.2

21

3.3

1.8

to

8.4

20

1.6

0.6

to

3.2

20

-0.7

-2.5

to

0.5

16

1.5

1.0

to

3.1

16

495
Family TROCHOCHAETIDAE Pettlbone, 1963

This family contains one genus and about six species
of worms that are rarely collected. In the United States,
one species has been recorded from the California coast,
and two occur in the New England region. The trocho-
chaetids build tubes and use their long, grooved palps to
gather food from bottom deposits and to capture particulate
matter in the water column.

A single, undetermined species was collected in Tampa
Bay.

Trochochaeta sp.

An anterior fragment was collected that measured 2
mm. wide by 20 mm. long. The palps were missing. The
anterior region consists of five setlgers — the fifth
bearing a series of stout, acicular setae (figure 9,C).
Branchial segments begin with the sixth setiger and con-
tinued throughout the length of the fragment examined.
The branchiae are single filaments that bear cilia on the
inner margin (figure 9,D). Aside from the acicular setae
mentioned, simple capillary setae were the only other type
noted.

The single specimen collected in Boca Ciega Bay was
dredged from Bunces Pass (table 216).

496

There, water depth was over 2m., and bottom type was
poorly sorted, medium sand. The content of shell and
granule size particles was high, and percentages of fine
particles and organic carbon were quite low(table 217).

No vegetation was recorded at the collection site.

The specimen was not gravid, but on the basis of its
size, I assume it was an adult.

497

Table 216. — Trochochaeta sp. — Locality records and number

of individuals from survey stations, Tampa Bay,
Florida, 1963-69 (D-dredge, S-shovel, N-net)

Boca Ciega Bay

Stations Individuals Stations Individuals

D S N D S N

BC-N 1

498

Table 217. — Trochochaeta sp. — Mean and range of observed
environmental factors from survey stations,
Tampa Bay, Florida, 1963-69

Factor

Mean

Range

Number
observations

Water temperature (*C.) 17.5

Salinity (.%,) 32.2

pH 8.3

Depth (m.) 2.3

Sediment type sand

Granules (wt. %) 14.7

Sands (wt. %) 83.5

Silts (wt. %) 1.5

Clay (wt. %) 0.3

CaC03 (wt. %) 38.2

Organic carbon (wt. %) 0.2

Organic nitrogen (wt. %) 0.03

Mean grain size,

total sample (0) 1.4

Standard deviation,

total sample (0) 1.9

Skewness, total sample -0.3

Kurtosis, total sample 0.9

Mean grain size,

noncarbonate fraction (0) 2.7

Standard deviation,
noncarbonate fraction (0) 0.7

Mean grain size,

carbonate fraction (0) 1.5

Standard deviation,

carbonate fraction (0) 0.2

499
Family CHAETOPTERIDAE Malmgren, 1667

Worms of this family live in membranous tubes in tem-
perate and tropical waters throughout the world. They feed
on suspended organic material that is trapped on a mucus
membrane and transferred to the mouth.

Five species were found in Tampa Bay. The most common
was Spiochaetopterus costarum oculatus. it was found in
all areas of Tampa Bay from saline waters near Egmont Key
into nearly fresh, tidal waters of tributary streams.
Chaetopterus variopedatus was collected only from upper and
lower Tampa Bay and Boca Clega Bay. Three, undetermined
mesochaetopterids were collected in Boca Ciega Bay and lower
Tampa Bay.
Key to CHAETOPTERIDAE Collected in Tampa Bay

1 Dwelling tube u-shaped; palps shorter than

anterior body region Chaetopterus variopedatus

- Dwelling tube straight; palps longer than

anterior body region 2

2 Dwelling tube membranous, ringed, and
transparent; setiger 4 bears a single,
stout, acicular

seta • Spiochaetopterus costarum oculatus

- Dwelling tube covered with sand grains;
setiger 4 bears a group of stout,
acicular, setae # 3

3 Dwelling tube rust-colored; palps unhanded;

eyes absent Hesochaetopterus sp. A

500

Dwelling tube covered with uncolored sand grains;
palps unhanded; eyes present.... Mesochaetopterus sp. B

Dwelling tube brown; palps banded with brown

pigment; diffuse eye spots present at base

of palps Mesochaetopterus sp . C

Chaetopterus varlopedatus (Renier, 1804)
(Described and illustrated by Hartman, 1969)

The 75 survey stations where C. varlopedatus was col-
lected were equally distributed between upper and lower
Tampa Bay and Boca Ciega Bay. Specimens were also col-
lected at an incidental locality on tidal flats adjacent
to the Sunshine Skyway in lower Tampa Bay (table 218) .

The worm was found mostly in sandy sediment, but a
few collections came from shelly or silty sand. Average
bottom type was poorly sorted, fine sand with nearly 20
percent shell, less than five percent silt and clay, and
under one percent organic carbon (table 219).

Nineteen of 48 bottom samples contained algae, and at
one of these, turtle grass was also present.

Gravid specimens were collected in June, July, and
August, but no young were found.

C. varlopedatus has been collected in the Gulf of
Mexico and at many localities throughout the world in tem-
perate and tropical waters . Vast beds of this worm have been
observed in the Gulf a few miles off the Florida west coast.

501

Table 218.— Chaetopterus variopedatus — Locality records

and number of individuals from survey stations,
Tampa Bay, Florida, 1963-69 (D-dredge, S-
shovel, N-net)

Upper Tampa Bay

Stations

Individuals Stations

Individuals

D S N

D S N

10-4

1

11-5

1

11-6

2

11-8

1

11-16

2

1

11-20

3

1

11-21

1

12-7

1

12-8

1

12-9

1

12-10

1

12-12

1

12-13

1

12-14

7

1

12-15

1

10

12-16

1

13-1-A

1

13-3

1

13-5

1

13-6

11

13-7

20

13-8

1

13-9

1

13-10

1

13-12

2

1

Boca Ciega Bay

BC-A

1

BC-E

1

BC-I

3

BC-N

1

D-2

1

D-8

1

D-16

1

D-19-B

1

1

D-22

1

1

D-24

1

14-2

1

14-3

1

1

14-4

1

1

15-1

1

15-3

1

15-4

1

1

15-5

1

1

15-6

1

1

15-8

5

1

15-10

1

15-11

2

1

15-12

1

1

15-13

4

1

15-14

14

1

16-1

1

16-6

1

502

Table 218. — Chaetopterus variopedatus — Locality records

and number of individuals from survey stations,
Tampa Eay, Florida, 1963-69 (D-dredge, S-
shovel, N-net)-(continued)

Lower Tampa Bay

Stations

Individuals Stations

Individuals

D S N

D S N

14-9

1

14-10

1

1

14-11

12

1

14-13

21

1

14-15

7

15-18

1

15-21

1

15-23

1

15-26

1

15-27

1

16-10

1

1

16-11

1

16-12

1

16-14

1

16-15

1

16-16

1

16-17

1

16-18

1

16-20

1

16-21

1

1

16-22

1

1

17-2

2

1

17-5

1

17-6

1

503

Table 219. — Chaetopterus variopedatus — Mean and range of
observed environmental factors from survey
stations, Tampa Bay, Florida, 1963-69

Number
Factor Mean Range observations

Water temperature (*C.)

Salinity (%.)

PH

Depth (m.)

Sediment type

Granules (wt. %)

Sands (wt. %)

Silts (wt. %)

Clay (wt. %)

CaCO, (wt. %)

Organic carbon (wt. %)

Organic nitrogen (wt. %)

Mean grain size,

total sample (0) 2.5 0.4 to 4.1 48

Standard deviation,
total sample (0)

Skewness, total sample

Kurtosis, total sample

Mean grain size,
noncarbonate fraction (0)

Standard deviation,
noncarbonate fraction (0)

Mean grain size,
carbonate fraction (0)

Standard deviation,
carbonate fraction (0)

21.4

13.0 to 30.8

48

30.0

24.3 to 34.6

47

8.1

7.7 to 8.5

46

1.6

£1 to 4.0

48

sand

shelly sand to
silty sand

4B

3.0

0.1 to 21.4

48

92.1

72.5 to 99.1

48

3.6

0.1 to 22.1

48

1.3

0.1 to 8.8

48

19.5

1.2 to 66.0

43

0.5

0.03 to 5.0

46

0.03

0.00 to 0.2

46

1.4

0.7 to

2.7

48

0.3

-1.2 to

2.1

48

7.4

-0.04 to

24.5

48

2.6

1.7 to

4.9

48

1.4

0.5 to

3.4

48

0.0

-2.5 to

2.2

38

1.3

0.2 to

2.9

38

504

Spiochaetopterus costarum oculatus (Webster, 1879)
(Described by Gitay, 1969)

Except for Nereis succlnea. this worm was found more
widely distributed in the Estuary than any other poly-
chaete. it was collected in all areas at a total of 219
survey stations, and seven incidental localities (table
220).

Average bottom type at dredge and shovel stations
was poorly sorted, fine sand. Shell was present in the
amount of nearly 12 percent and consisted of some large
particles. The percentage of silt and clay was over 16,
and nearly one percent organic carbon was present (table
221).

About 30 percent of the bottom samples contained algae,
and one or more species of all sea grasses found in the
Estuary aside from Halophila.

No juvenile worms were observed, and tubes were not
opened to determine the reproductive condition of adults.

This species has been collected in the Gulf of Mexico
and is otherwise known from the northwestern Atlantic.

505

Table 220. — Spiochaetopterus costarum oculatus — Locality
records and number of individuals from survey
stations, Tampa Bay, Florida, 1963-69 CD-
dredge, S-shovel, N-net)

Old Tampa

Bay

Stations

Individuals

Stations

Individuals

D

S

N

D

S

N

A

1

4-6

12

A-2

1

4-7

10

1

A-6

1

4-8

13

1

B

8

4-9

4

B-l

3

4-11

8

B-2

3

4-12

30

1-3

6

10

4-13

8

1

1-4

3

14

4-14

41

1-5

3

1

4-15

46

4

2-3

1

4-16

42

7

2-5

2

4-1 7-A

128

3-2

1

4-19

3

3-3

11

5-1-B

2

3-4

2

i

5-2

12

3-5

4

18

5-3

7

3-6

10

7

5-4

8

3-7

6

2

5-5

4

3-8

50

5-6

3

3-9

4

5-11

1

3-11

103

6-1-A

7

3-12

309

1

6-1-B

9

3-13

1

6-1-C

1

3-14

3

6-2

3

3-15

3

6-4-A

5

2

3-16

12

6-6'

3

4-2

3

6- 7-A

2

4-4

6

1

506

Table 220. — Splochaetopterus co a tar urn oculatus — Locality
records and number of Individuals from survey
stations, Tampa Bay, Florida, 1963-69 CD-
dredge, S-shovel, N-net)-( continued)

Stations

Individuals

Hillsborough Bay

Stations

Individuals

C-l

2

8-8

1

C-2

1

8-9

1

1

C-5

1

10

9-3

150

C-6

1

10

9-4

60

C-8

1

9-6

C-9

1

10-15

1

7-1

4

10-16

4

7-2

1

10-17

10

7-3

2

10-19

9

8-1

1

10-20

7

8-2

4

1

10-21

1

8-3

8

10-22

23

507

Table 22Q.--Spiochaetopterus costarum oculatus — Locality
records and number of individuals from survey
stations, Tampa Bay, Florida, 1963-69 (D-
dredge, S-shovel, N-net)-(contlnued)

Upper

Tampa Bay

Stations

Individuals

Stations

Individuals

D

S

N

D

S

N

10-

■1-A

2

11.

-19

13

1

10-

-3

1

1

11-

-20

12

1

10-

-4

58

1

11-

-21

61

1

10-

-6

1

11-

-22

17

1

10-

-7

1

11-

-23

6

1

10-

-8

16

11-

-24

6

10-

-9

14

11-

-25

45

1

10-

-14-A

1

11-

-26

29

1

11-

-2

2

11-

-27

30

11.

-3

1

11-

-28

8

11.

-4

5

1

11-

-28-1

2

11.

-5

23

12-

-1

1

11-

-6

54

12-

-3

11-

-7

39

1

12-

-4

5

11.

-8

3

1

12-

-6

11.

-9

1

12-

-7

11.

-10

1

12-

-9

11.

-11

5

1

12-

-13

11-

-12

1

1

12-

-14

259

11.

-13

8

1

12-

-15

3

11.

-14

10

1

12.

-16

1

11.

-15

3

1

13-

-1-A

3

11.

-16

117

1

13-

-5

3

11.

-17

1

13-

-11

1

11.

-IB

18

13-

-i2

10

1

508

Table 220.--Spiochaetopterus costarum oculatus— Locality
records and number of individuals from survey
stations, Tampa Bay, Florida, 1963-69 CD-
dredge, S-shovel, N-net)-(continued)

Boca Ciega Bay

Stations

Individuals Stations

Individuals

D S N

D S N

BC-A

BC-E

BC-G

BC-H

BC-M

BC-M-1

BC-N

D-l

D-2

D-3

D-4

D-5

D-6

D-7

D-8

D-10

D-ll

D-l 3

D-l 4

D-l 6

D-l 7

D-19-B

D-20

D-21

D-22

17

1

1
2

39

13

10
10
10
10

D-2 5

PB-1

14-1-A

14-2

14-3

14-4

15-1

15-3

15-4

15-5

15-6

15-7

15-8

15-9

15-10

15-11

15-12

15-13

15-14

15-15

15-16

15-17

16-1

16-6

16-7

2
2

10

10
3
4
3

3

4

1

22

6

1
1
i
1
11

24
12

D-2 3

8

Terra Ceia Bay

E-2
E-3

3-4

19
5

1

E-5
E-7
E-8

1
17

1

10

509

Table 220.— Spiochaetopterus costarum oculatus — Locality
records and number of individuals from survey
stations, Tampa Bay, Florida, 1963-69 CD-
dredge, S-shovel, N-net)-( continued)

Lower Tampa Bay

Stations

Individuals Stations

Individuals

D S N

0 S N

14-5

2

14-6

1

14-10

3

14-11

1

14-13

2

14-15

1

14-18

12

15-18

1

15-19

15-20

1

15-22

2

15-23

2

15-24

1

15-26

15-31

1

15-32

1

16-10

3

16-11

4

16-13

5

16-16

1

16-17

1

16-20

19

1

16-21

37

1

16-22

37

1

16-23

2

16-25

2

16-26

5

16-27

5

1

17-2

4

17-5

3

1

17-6

17

17-7

8

17-8

2

17-9

3

18-3

1

510

Table 221.--Splochaetopterus costarum oculatus--Mcan and
range of observed environmental factors from
survey stations, Tampa Bay, Florida, 1963-69

Factor

Mean

Range

Number
observations

Water temperature (*C.)

Salinity (*.)

PH

Depth (m.)

Sediment type

Granules (wt. %)

Sands (wt. %)

Silts (wt. %)

Clay (wt. %)

CaC03 (wt. %)

Organic carbon (wt. %)

Organic nitrogen (wt. %)

Mean grain size,
total sample (0)

Standard deviation,
total sample (0)

Skewness, total sample

Kurtosis, total sample

Mean grain size,
noncarbonate fraction (0)

Standard deviation,
noncarbonate fraction (0)

Mean grain size,
carbonate fraction (0)

Standard deviation,
carbonate fraction (0)

26.1

13.0

to

33.8

199

27.0

0.7

to

35.0

198

8.0

7.0

to

8.5

174

1.2

Zi

to

4.0

200

sand

shelly sand to
clayey silt

196

2.5

0.0

to

79.7

196

85.3

4.6

to

99.9

196

7.1

0.0

to

56.5

196

4.9

0.0

to

65.9

196

11.5

0.6

to

69.0

195

0.8

0.04 to 8.5

130

0.05

0.00 to 0.3

130

2.9

-4.0

to

7.3

195

1.4

0.5

to

3.5

195

0.6

-1.4

to

3.6

195

10.3

-1.3

to

76.3

195

3.1

1.4

to

9.0

194

1.4

0.4

to

3.2

194

-0.1

-2.6

to

3.0

181

1.3

0.2

to

3.1

181

511
Mesochaetopterus sp. A

This species constructs a long, straight, fibrous,
dwelling tube that is covered with rust-colored sand
grains where it is exposed above the sediment surface.
Only anterior worm fragments were collected. The largest
was about 35 mm. long by 3 mm. wide. It had palps that
were about 30 mm. long. An anterior portion, setae from
setigers one, three, and four, and an uncinus have been
illustrated (figure 9,E,F,G,H, I) .

Specimens were collected at four survey stations in
Boca Ciega Bay and at one in lower Tampa Bay (table 222).

Sediment at these five sites was sand that, as an
average, was fine and poorly sorted. Shell content was
nearly 18 percent, and the percentages of silt, clay, and
organic carbon were low (table 223).

Algae, shoal grass, and turtle grass were found at
two of the collection sites.

Neither gravid nor juvenile specimens were seen.

Tubes of this worm wash ashore in great numbers along
St. Petersburg Beach after storms, and I have seen similar
tubes on sand flats around Beaufort, North Carolina.

512

Table 222.--Mesochaetopterus sp. A — Locality records and
number of Individuals from survey stations,
Tampa Bay, Florida, 1963-69 (D-dredge, S-
shovel, N-net)

Boca Ciega Bay

Stations

Individuals Stations

Individuals

D S N

0 S N

D-3
D-25

1 14-3
1 14-4

1

1

Lower Tampa Bay

14-12

1

513

Table 223. — Mesochaetopterus sp. A — Mean and range of ob-
served environmental factors from survey
stations, Tampa Bay, Florida, 1963-69

Factor

Mean

Range

Number
observations

Water temperature (*C.)

Salinity (%. )

PH

Depth (m.)

Sediment type

Granules (wt. %)

Sands (wt. %)

Silts (wt. %)

Clay (wt. %)

CaC03 (wt. %)

Organic carbon (wt. %)

Organic nitrogen (wt. %)

Mean grain size,
total sample (0)

Standard deviation,
total sample (0)

Slcewness, total sample

Kurtosis, total sample

Mean grain size,
noncarbonate fraction (0)

Standard deviation,
noncarbonate fraction (0)

Mean grain size,
carbonate fraction (0)

Standard deviation,
carbonate fraction (0)

19.8

17.4

to

27

5

30.7

29.1

to

33.1

5

8.2

8.0

to

8.4

5

1.2

0-

to

3.3

5

sand

—

5

4.4

0.8

to

7.5

5

90.7

81.0

to

94.8

5

3.9

0.8

to

10.0

5

1.0

0.3

to

2.2

5

17.9

3.5

to

45.5

5

0.2

0.1

to

0.4

5

0.02

0.01 tc

I 0.03

5

2.4

1.4 to 3.1

1.6 1.2 to 2.4

0.1 -0.4 to 0.9

5.3 1.7 to 9.1

2.8 2.5 to 3.3

1.4 0.7 to 2.7
0.0 -0.5 to 0.8
1.2 0.9 to 1.8

Figure 9. — Diagnostic features of Pseudopolydora sp.,

Trochochaeta sp . , and Mesochaetopterus sp . A

Pseudopolydora sp. : (A) Brush-top, acicular seta

from the fifth setiger (B)
Acicular hook from the fifth
setiger

Trochochaeta sp. : (c) Group of acicular setae

from setiger five (D) Setiger
seven showing branchia and
single parapodial lobe

Mesochaetopterus sp. A: (E) Anterior end (F) Setae

from setiger one (G) Seta
from setiger three (H) Setae
from setiger r.f our (I) Uncinus
from abdominal region.

515

FIGURE 9

M

516
Mesochaetopterus sp. B

This mesochaetopterid lives in a fragile, membranous
tube covered with sand grains. Only anterior fragments of
worms were collected. The anterior region is about 5 mm.
long by 2 mm. wide, and the tentacles are about 10 mm. long.
Segments of the middle body region are about 3 mm. long.
There is a pair of distinct eye spots near the palp bases.
In some respects this species resembles Mesochaetopterus
minuta. The anterior end, setae from setigers one and four,
and an unclnus have been illustrated (figure 10, A, B,C,D,E,F) .

Specimens were collected from Bunces Pass in Boca Ciega
Bay (BC-N) and from two survey stations in lower Tampa Bay
(table 224).

All collections were made in sand that was fine and
poorly sorted. Shell content was high, and contained some
large fragments. Silt, clay, and organic carbon percentages
were very low (table 225) .

Algae and turtle grass were noted in bottom samples
from one station.

No juvenile worms were collected, and no observations
were made on gamete production.

517

Table 224.--Mesochaetopterus sp. B--Locality records and
number of individuals from survey stations,
Tampa Bay, Florida, 1963-69 (D-dredge, S-
shovel, N-net)

Boca Ciega Bay

Stations

Individuals Stations

Individuals

D S N

D S N

BC-N

10

Lower Tampa Bay

15-21

3 18-4

1

518

Table 225. — Mesochaetopterus sp. B — Mean and range of ob-
served environmental factors from survey
stations, Tampa Bay, Florida, 1963-69

Factor

Mean

Range

Number
observations

24.2

23.2

to

25.1

2

32.7

31.2

to

34.2

2

7.9

7.7

to

8.1

2

1.0

—

2

sand

—

2

4.2

2.7

to

5.8

2

93.9

90.9

to

97.0

2

1.3

0.2

to

2.4

2

0.5

0.1

to

0.9

2

28.5

7.2

to

49.9

2

0.07

0.03 to

i 0.1

2

0.02

2

Water temperature (*C.)

Salinity <*.)

PH

Depth (m.)

Sediment type

Granules (wt. %)

Sands (wt. %)

Silts (wt. %)

Clay (wt. %)

CaC03 (wt. %)

Organic carbon (wt. %)

Organic nitrogen (wt. %)

Mean grain size,
total sample (0)

Standard deviation,
total sample (0)

Skewness, total sample

Kurtosis, total sample

Mean grain size,
noncarbonate fraction (0)

Standard deviation,
noncarbonate fraction (0)

Mean grain size,
carbonate fraction (0)

Standard deviation,
carbonate fraction (0)

2.1

2.0 to 2.1

1.5 1.0 to 1.9

-0.6 -0.7 to -0.5

6.7 6.4 to 6.9

2.2 1.9 to 2.6

1.0 0.7 to 1.4

-0.5 -0.7 to -0.4

1.4 1.3 to 1.4

519

Mesochaetopterus sp. C

This undetermined species constructs a brown, fibrous
dwelling tube that is sparsely covered with sand grains.
Only a few, anterior segments from two specimens were col-
lected. The peristomium bears a pair of tentacles that are
about 25 mm. long, and banded with light brown pigment.
Black pigment spots are clustered at the palp bases (eyes?).
The anterior end, and setae from setiger four have been
illustrated (figure 10,G,H,I,J).

Specimens were collected at a survey station in Boca
Ciega Bay (BC-N) and at an incidental locality near Mullet
Key in lower Tampa Bay (table 226).

No sediment data are available for either locality.

Neither locality had bottom vegetation.

No gravid sepclmens were collected, and no juveniles
were found.

520

Table 226. — Mesochaetopterus sp. C — Locality records and
number of individuals from survey stations,
Tampa Bay, Florida, 1963-69 (D-dredge, S-
shovel, N-net)

BC-N

Boca Ciega Bay

Stations Individuals Stations Individuals

Figure 10. — Diagnostic features of Mesochaetopterus sp. B
and Mesochaetopterus sp. C

Mesochaetopterus sp. B: (A) Anterior end (B) Dorsal

setae from setiger one (C)
Ventral seta from setiger one

(D) Setae from setiger four

(E) Seta from setiger four

(F) Uncinus from abdominal
region

Mesochaetopterus sp. C: (G) Anterior end (H) Dorsal

seta from setiger four (I)
Middle seta from setiger four
(J) Ventral setae from setiger
four.

FIGURE 10

522

*£U

0.05MM 0.05MM 0.10MM

523

Family CIRRATULIDAE Carus, 1863
Clrratulids occur In seas throughout the world where
they are generally found in soft sediments. Some, however,
nestle among shells, and others burrow in shell or rock.
These worms have grooved palps or tentacles that are used
to gather food from bottom deposits.

Twelve cirratulids were identified in Tampa Bay. Only
three of these were determined with certainty as the palps,
tentacles, and branchial processes, which are important
taxonomic features, were often missing, especially in
dredged material. Only two species, Cirratulus sp. D and
Tharyx sp. C, were found in all areas of the Estuary. The
next most widely distributed species, Cirratulus grandis,
Cirriforrnia filigera, Cirriformia sp. A, Cirriformia sp. B,
and Cirratulus sp. A, were found in most areas from upper
Tampa Bay to Tampa Bay entrance. In addition, Cirriformia
sp. A was found in Old Tampa Bay. The remaining five
species were collected only in lower Tampa Bay, or that
area and Boca Ciega Bay as well (Dodecaceria concharum,
Cirratulus sp. B, Cirratulus sp. C, Tharyx sp. A, and
Tharyx sp. B) .

Key to CIRRATULIDAE Collected in Tampa Bay
1 Peristomium bears a pair of grooved palps 2

524

- Palps absent; anterior setigers bear

grooved, tentacular filaments 4

2 Parapodla contain slender, capillary setae,
as well as stout, acicular, spoon-shaped

setae Dodecacerla concharum

Parapodia contain slender, capillary

setae only 3

3 Serrate, capillary setae in anterior segments
are replaced by smooth, capillary setae in

median and posterior segments Tharyx sp. A

- All setae are fine, smooth capillaries ... Tharyx sp. B

Anterior neurosetae and all notosetae are

fine, smooth capillaries; median and

posterior neurosetae have a serrate

margin Tharyx sp . C

4 First branchial filaments arise with first
tentacular filaments 5

- First branchial filaments arise in front

of the tentacular filaments 7

5 Capillary setae only Cirratulus grandis

Branchial and tentacular filaments arise

on the third setiger Cirratulus sp. A

Branchial and tentacular filaments arise

on the first setiger 6

6 Median and posterior segments have acicular
hooks only in both notopodia and

neuropodia; eyes present Cirratulus sp. B

Acicular hooks in median and posterior

segments accompanied by capillary setae;

eyes present Cirratulus sp . C

- Acicular hooks appear only in neuropodia

of posterior segments; no eyes Cirratulus sp. D

525

7 Acicular setae have entire tips and first

arise about setiger 12 Cirriformia filigera

- Acicular setae have entire tips and

appear on the first setiger Cirriformia sp. A

- Acicular setae appear in notopodia about
setiger 25, and in neuropodia about
setiger 15; some have bifid

tips Cirriformia sp. B

Cirratulus grandis Verrill, 1873
This species was the largest cirratulid found in the
Eatuary. Specimens measured up to 200 mm. in length. It
was collected at a total of 53 survey stations in all areas
of the Estuary except Old Tampa Bay and Hillsborough Bay.
Incidental collections came from four localities in Boca
Clega and lower Tampa Bays. Thirty-seven of the survey sta-
tions and three incidental localities were in Boca Ciega Bay
(table 227).

Average sediment type at dredge and shovel stations
was poorly sorted, fine sand. It had less than 10 percent
shell, and only a few fragments in the granule and larger
size classes. Weight percentage of silt and clay was about
five percent and organic carbon was less than one percent
(table 228).

One-half of the bottom samples contained algae and
one or more sea grasses that included all of those found

526
in the Estuary except widgeon grass.

Gravid specimens were collected in March, and juvenile
worms were found in May, August, October, November, and
December.

C. grand is has been collected in the Gulf of Mexico
and along the coast of the eastern United States.

527

Table 227. — Clrratulus qrandls — Locality records and

number of Individuals from survey stations,
Tampa Bay, Florida, 1963-69 (D-dredge, S-
shovel, N-net)

Upper Tampa Bay

Stations

Individuals Stations

Individuals

D S N

0 S

N

D-28
12-14

1 13-1-A
2 13-13

1
1

Boca Ciega Bay

BC-A

4

15-4

1

BC-C

10

15-6

11

BC-E

7

15-8

4

BC-G

4

15-9

1

BC-I

1

15-11

4

BC-M

25

3

15-12

16

BC-M-1

16

15-13

7

BC-N

2

1

15-14

5

D-2

2

15-15

134

D-6

10

15-16

61

D-19-A

5

15-17

1

D-2 3

1

16-1

64

D-25

2

4

16-2

2

PB-4

3

16-3

110

PB-5

1

16-4

127

14-1-A

40

16-5

1

14-2

1

16-6

2

14-3

22

16-8

32

14-4

15

Terra Ceia Bay

E-4

E-6

528

Table 227.-- Clrratulus grandls — Locality records and

number of Individuals from survey stations,
Tampa Bay, Florida, 1963-69 (D-dredge, S-
shovel, N-net)-( continued)

Lower Tampa Bay

Stations

Individuals Stations

Individuals

D S N

D S N

14-6

16

14-18

24

15-31

2

15-32

1

16-10

4

16-21

2

16-22

2

16-23

1

17-13

9

17-15

142

529

Table 228«-- Clrratulus grandls— Mean and range of observed
environmental factors from survey stations,
Tampa Bay, Florida, 1963-69

Factor

Mean

Range

Number
observations

Water temperature (#C.)

22.3

12.8

to

30.8

53

Salinity (%.)

30.7

26.3

to

34.8

53

PH

8.1

7.7

to

8.5

49

Depth (m. )

0.8

D-

to

2.3

53

Sediment type

sand

sand
sand

to

silty

52

Granules (wt. %)

2.5

0.0

to

14.7

52

Sands (wt. %)

92.4

72.5

to

99.8

52

Silts (wt. %)

3.9

0.1

to

22.1

52

Clay (wt. %)

1.2

0.0

to

7.2

52

CaC03 (wt. %)

9.9

1.2

to

66.0

52

Organic carbon (wt. %)

0.6

0.1

to

6.9

47

Organic nitrogen (wt. %)

0.03

0;00 to 0.2

47

Mean grain size,
total sample (0)

2.7

1.4

to

3.5

52

Standard deviation,
total sample (0)

1.3

0.5

to

2.5

52

Skewness, total sample

0.3

-1.2

to

1.6

52

Kurtosis, total sample

8.0

-0.04 to 24.4

52

Mean grain size,
noncarbonate fraction (0)

2.9

1.8

to

8.7

51

Standard deviation,
noncarbonate fraction (0)

1.1 0.5 to 2.2

51

Mean grain size,
carbonate fraction (0)

0.3 -2.5 to 2.4

45

Standard deviation,
carbonate fraction (0)

1.1 0.2 to 2.9

45

530

Cirriformia flligera (delle Chiaje, 1825)
(Described and illustrated by Day, 1967)

Large, complete specimens were collected from oyster
clumps at three incidental localities in Boca Ciega Bay.
Others came from 14 survey stations in all areas of the
Estuary between upper and lower Tampa Bay (table 229).

Sediment data indicate that C. filigera generally
inhabits sand that is fine and poorly sorted. Average
shell content was over 20 percent with most of it being
in the sand size categories. The weight percentage of
silt and clay was about five percent, and organic carbon
was under one percent (table 230) .

Only two of 10 bottom samples contained algae, and
one or more sea grasses that included shoal, manatee, and
turtle grass.

No gravid specimens were noted, but juveniles were
collected in May, September, October, November, and
December.

This species has been collected in the Gulf of Mexico
and from equatorial and temperate waters around the world.

531

Table 229. — Cirrlformla flllqera — Locality records and
number of individuals from survey stations,
Tampa Bay, Florida, 1963-69 (D-dredge, S-
shovel, N-net)

Upper Tampa Bay

Stations

Individuals Stations

Individuals

0 S N

D S N

12-13

3

Boca Ciega Bay

BC-N

2

15-1

D-25

1

1

15-11

D-26

18

15-12

14-3

10

15-13

Terra Ceia Bay

E-5

3 E-6

2

Lower Tampa Bay

D-27
15-32

1

2

16-11

1

532

Table 230. — Cirrlformla fillqera — Mean and range of

observed environmental factors from survey
stations, Tampa Bay, Florida, 1963-69

Factor

Mean

Range

Number
observations

Water temperature (*C.)

Salinity (%.)

pH

Depth (m.)

Sediment type

Granules (wt. X)

Sands (wt. %)

Silts (wt. %)

Clay (wt. %)

CaC03 (wt. %)

Organic carbon (wt. %)

Organic nitrogen (wt. %)

Mean grain size,
total sample (0)

Standard deviation,
total sample (0)

Skewness, total sample

Kurtosis, total sample

Mean grain size,
noncarbonate fraction (0)

Standard deviation,
noncarbonate fraction (0)

Mean grain size,
carbonate fraction (0)

Standard deviation,
carbonate fraction (0)

22.9

13.0

to

26.8

10

31.8

29.4

to

35.1

10

8.0

7.8

to

8.3

10

1.0

tf

to

2.3

10

sand

sand
sand

to

silty

9

4.0

0.3

to

14.7

9

90.8

72.4

to

99.4

9

4.2

0.0

to

22.1

9

0.9

0.0

to

5.1

9

23.6

0.9

to

99.6

9

0.6

0.1

to

3.0

7

0.02

0.00 to 0.04

7

2.6

3.1

1.4 to 4.1

1.4

0.9 to 2.0

9

0.2

-1.1 to 1.0

9

7.4

-0.04 to 21.2

8

2.1 to 6.1

1.2 0.7 to 1.8

0.6 -1.8 to 3.0

1.0 0.2 to 1.6

533

Dodecaceria concharum Oersted, 1943
(Described and illustrated by Hartman, 1969)

Many specimens were extracted from limestone clumps
collected by net in lower Tampa Bay, and one was taken
from a large, live gastropod (Busycon) in Boca Ciega Bay
(table 231).

No specific, environmental data were obtained, and
no information is available on the worm's reproductive
habits.

D. concharum is commonly found in rocky, coastal
waters around the world from temperate latitudes to the
tropics. Hartman (1951) recorded Dodecaceria near
concharum from the Gulf of Mexico.

534

Table 231. --Dodecacer la concharum — Locality records and
number of individuals from survey stations,
Tampa Bay, Florida, 1963-69 (D-dredge, S-
shovel, N-net)

Boca Ciega Bay

Stations

Individuals Stations

Individuals

D S N

D S N

D-25

1

Lower Tampa Bay

18-3

25

535
Cirratulus sp. A

This cirratulid has a rounded prostomium and no eyes.
Ventrally, around the mouth and over the first few setigers,
there are spots of dark pigment. Branchial and tentacular
filaments begin on setiger three. Bifid, acicular neuro-
setae begin on the ninth setiger (figure 11, A) and bifid,
acicular notosetae begin on setiger seven (figure 11, B).
The acicular setae occur in pairs. Capillary setae are
present dorsally and ventrally on all setigers.

Specimens were collected at 12 survey stations in
lower Tampa Bay and at one in upper Tampa Bay (table 232).

Sediments at all bottom stations were either sand or
shelly sand that contained very little silt and clay, but
nearly one percent organic carbon. Shell content was high,
and consisted mainly of sand and granule size particles
(table 233).

Vegetation was noted in only two bottom samples.

Algae were present, but no sea grasses were recorded.

Neither gravid nor juvenile individuals were seen.

5 36

Table 232 ♦— Cirratulus sp. A—Locality records and number

of individuals from survey stations, Tampa Bay,
Florida, 1963-69 (D-dredge, S-shovel, N-net)

Upper Tampa Bay

Stations

Individuals Stations

Individuals

D S N

D S N

13-3

44

Lower Tampa Bay

15-29

4

15-31

2

16-12

16-13

2

16-14

108

16-15

17

16-16

3

16-17

1

16-20

17-2

43

17-3

75

17-4

13

537

Table 233. — Clrratulus sp. A — Mean and range of observed
environmental factors from survey stations,
Tampa Bay, Florida, 1963-69

Factor

Mean

Range

Number
observations

Water temperature (*C.)

Salinity (%.)

PH

Depth (m.i

Sediment type

Granules (wt. %)

Sands (wt. %)

Silts (wt. %)

Clay (wt. %)

CaC03 (wt. *)

Organic carbon (wt. %)

Organic nitrogen (wt. %)

Mean grain size,
total sample (0)

Standard deviation,
total sample (0)

Skewness, total sample

Kurtosis, total sample

Mean grain size,
noncarbonate fraction (0)

Standard deviation,
noncarbonate fraction (0)

Mean grain size,
carbonate fraction (0)

Standard deviation,
carbonate fraction (0)

23.9

21.2 to

24.9

12

32.6

30.4 to

34.5

12

8.0

7.7 to

8.2

12

2.4

£i to

4.0

12

sand

shelly sand
to sand

11

5.4

0.5 to

21.4

11

93.2

77.8 to

99.2

11

1.2

0.2 to

2.7

11

0.3

0.1 to

0.8

11

54.0

20.7 to

85.2

11

0.8

0.1 to

3.3

11

0.06

0.01 to 0.2

11

1.3

0.4 to

1.9

11

1.3

1.0 to

1.6

11

0.4

0.1 to

0.8

11

4.4

0.8 to

8.2

11

3.3

2.2 to 5.9

1.4 0.6 to 3.2

0.5 -0.1 to 1.7

1.0 0.8 to 1.3

11
11
10
10

538
Cirratulus sp. B

The prostomium is pointed and bears a pair of dis-
tinct eyes. Branchial and tentacular filaments appear
on the first setlger. Acicular setae are bifid and appear
ventrally on the first setiger (figure 11, C). They first
arise dorsally in median notopodia and persist in neuro-
podia through posterior setigers. There are as many as
12 acicular setae per fascicle. Capillary setae are pres-
ent dorsally and ventrally through about 20 setigers.
Those in dorsal fascicles are quite long.

Specimens were collected at three survey stations and
one incidental locality in Boca Ciega Bay, and at 12 survey
stations in lower Tampa Bay (table 234) .

Sediments at these stations were shelly sand or sand.
The content of silt and clay was less than five percent
and organic carbon was under one percent. As an average,
sediment sorting was very poor (table 235).

One-third of the bottom samples contained algae and
either turtle or manatee grass.

Neither juveniles nor worms in reproductive condition
were collected.

539

Table 234. — Clrratulus sp. B — Locality records and number

of individuals from survey stations, Tampa Bay,
Florida, 1963-69 (D-dredge, S-shovel, N-net)

Boca Ciega Bay

Stations Individuals Stations Individuals

PB-4 1 16-7

16-6 6

Lower Tampa Bay

16-11 3 16-25

16-13 3 17-2 8

16-19 5 17-6 3

16-21 11 17-8 1

16-22 1 17-9 3

16-23 2 18-3 1

540

Table 235.-- Cirratulus sp. B — Mean and range of observed
environmental factors from survey stations,
Tampa Bay, Florida, 1963-69

Factor

Mean

Range

Number
observations

Water temperature CO)

Salinity (%.)

PH

Depth Cm.)

Sediment type

Granules (wt. %)

Sands (wt. %)

Silts (wt. %)

Clay (wt. %)

CaCO, (wt. %)

Organic carbon (wt. %)

Organic nitrogen (wt. %)

Mean grain size,
total sample (0)

Standard deviation,
total sample (0)

Skewness, total sample

Kurtosis, total sample

Mean grain size,
noncarbonate fraction (0)

Standard deviation,
noncarbonate fraction (0)

Mean grain size,
carbonate fraction (0)

Standard deviation,
carbonate fraction (0)

22.8

19.2

to 25.2

32.9

30.5

to 34.5

8.0

7.8

to 8.2

1.7

D-

to 4.0

sand

shelly sand
to sand

6.0

0.3

to 28.7

91.3

68.8

to 98.3

2.1

1.0

to 4.7

0.5

0.2

to 1.2

19.0

2.7

to 44.4

0.7

0.0

to 3.3

0.04

0.01 to 0.2

2.1 0.9 to 3.1

3.5 0.8 to 3.0

0.01 -0.8 to 0.8

7.1 -0.8 to 17.9

3.0 1.4 to 6.1

1.3 0.6 to 3.2

0.4 -0.6 to 3.0

1.0 0.7 to 1.3

15
15
15
15
15

15
15
15
15

15
15
15

15

15
15
15

15

15

12

12

541

Cirratulus sp. C

The prostomium bears a pair of eyes, and the peri-
stomium is modified dorsally in the shape of an elongated
cephalic plate. Branchial and tentacular filaments begin
on the first setiger. Neuropodial, acicular setae appear
on setiger one (figure 11, D) and continue on all segments.
Dorsally, acicular setae first appear about setiger 25
(figure 11, E). Capillary notosetae of anterior segments
have a spinous margin (figure 11, F). The pygldium has
the characteristic shape illustrated (figure 11, G) .

Specimens were collected at a survey station and
incidental locality in Boca Clega Bay, and at two survey
stations in lower Tampa Bay (table 236).

Sediments at collecting stations were poorly sorted,
fine sand that contained over 15 percent shell, less than
five percent silt and clay, and less than one percent
organic carbon (table 237).

Algae were recorded at one station.

No data on the worm's reproductive habits are avail-
able.

542

Table 236. — Clrratulus sp. C — Locality records and number

of individuals from survey stations, Tampa Bay,
Florida, 1963-69 (D-dredge, S-shovel, N-net)

Boca Ciega Bay

Stations

Individuals Stations

Individuals

D S N

D S N

16-6

1

Lower Tampa Bay

17-8

2 17-10

1

543

Table 237. — Cirratulus sp. C — Mean and range of observed
environmental factors from survey stations,
Tampa Bay, Florida, 1963-69

Factor

Mean

Ranc

ie

Number
observations

Water temperature (

•c.

)

20.8

19.0

to

24.2

3

Salinity (%.)

32.5

30.8

to

34.3

3

PH

8.1

8*0

to

8.2

3

Depth (m. )

1.3

1.0

to

1.7

3

Sediment type

sand

--

3

Granules 'wt. %)

4.6

1.3

to

8.9

3

Sands (wt. %)

93.2

87.8

to

96.1

3

Silts (wt. %)

1.6

0.5

to

2.4

3

Clay (wt. %)

0.5

0.1

to

0.9

3

CaC03 (wt. %)

15.6

10.0

to

19.8

3

Organic carbon (wt.

%)

0.5

0.1

to

1.0

3

Organic nitrogen (w

t.

%)

0.01

~

3

Mean grain size,
total sample (0)

2.3

2.1

to

2.4

3

Standard deviation,
total sample (0)

Skewness, total sample

Kurtosis, total sample

Mean grain size,
noncarbonate fraction (0)

Standard deviation,
noncarbonate fraction (0)

Mean grain size,
carbonate fraction (0)

Standard deviation,
carbonate fraction (0)

1.5 1.0 to 2.0

-0.6 -1.3 to 0.1

7.8 4.2 to 14.5

2.7 2.4 to 3.1

0.9 0.6 to 1.3

-0.6

0.8

544

Cirratulus sp. D

This species has no eyes. Branchial and tentacular
filaments begin on the first setiger. Except for about
the last 25 segments, only capillary setae are present in
notopodia and neuropodia. In these posterior segments,
bifid, acicular setae accompany capillary ones (figure 11,
H) . The last few segments contain only acicular setae.

This undetermined cirratulid was found in all areas
of the Estuary at 15 survey stations (table 238).

Sediment type was predominantly sand, but specimens
were also collected in shelly sand and soft sediments.
The average sediment type was poorly sorted, fine sand
that contained a large amount of shell and over 12 percent
silt and clay. The organic carbon content was nearly one
percent (table 239).

Most collections came from depths below 2 m., and
no vegetation was noted in bottom samples.

No specimens provided information on the worm's
reproductive habits.

545

Table 238.--Clrratulus sp. D~Locality records and number

of individuals from survey stations, Tampa Bay,
Florida, 1963-69 (D-dredge, S-shovel, N-net)

Old Tampa Bay

Stations

Individuals Stations

Individuals

D

S

N

D S N

6-2

1

Hillsborough Bay

10-16

4

1 10-17

4

Upper Tampa Bay

10-4
11-12

17
1

11-15
11-16

42

46 3

Boca Ciega Bay

15-4

1

Terra Ceia Bay

E-l

2

Lower Tampa Bay

15-26
16-13
16-16

1
5
2

17-2
17-4
17-5

2

4

1

546

Table 239. — Clrratulus sp. D — Mean and range of observed
environmental factors from survey stations,
Tampa Bay, Florida, 1963-69

Factor

Mean

Range

Number
observations

Water temperature

CO

27.2

22.6 to 31.8

14

Salinity (*. )

28.7

22.3 to 34.5

14

PH

8.0

7.6 to 8.2

14

Depth (m. )

2.5

£1 to 4.0

14

Sediment type

sand

shelly sand to
silty clay

14

Granules (wt. %)

6.6

0.4 to 41.5

14

Sands (wt. %)

80.5

12.4 to 99.2

14

Silts (wt. %)

7.4

0.0 to 40.2

14

Clay (wt. %)

4.9

0.0 to 40.0

14

CaC03 (wt. %)

37.5

15.1 to 65.5

14

°rganic carbon (wt

. %)

0.8

0.1 to 3.3

10

Organic nitrogen (

wt. %)

0.05

0.00 to 0.2

10

Mean grain size,
total sample (0)

Standard deviation,
total sample (0)

Skewness, total sample

Kurtosis, total sample

Mean grain size,
noncarbonate fraction (0)

Standard deviation,
noncarbonate fraction (0)

Mean grain size,
carbonate fraction (0)

Standard deviation,
carbonate fraction (0)

2.4

0.9 to 7.1

14

1.8

1.0

to

3.5

14

0.1

-0.8

to

0.7

14

2.6

-0.4

to

6.3

14

3.3

2.4

to

5.5

14

1.5

0.6

to

3.2

14

0.2

-1.7

to

1.7

13

1.4

0.8

to

2.7

13

547
Cirriformia sp. A
This species is characterized by the presence of a
very deep ventral groove, and straight, acicular spines
in neuropodia of all setigers (figure 11,1).

Specimens were collected at one survey station in
each of the following areas: Old Tampa Bay, upper Tampa
Bay, Boca Ciega Bay, and lower Tampa Bay. Additional, in-
cidental collections were made at two stations in Boca
Ciega Bay and lower Tampa Bay near Mullet Key (table 240).
Sediments at dredge stations were all shelly sand or
sand. Average bottom type was poorly sorted, fine sand
that contained over 23 percent shell, about five percent
silt and clay, and an exceptionally high amount of organic
carbon. Much of the shell was in the granule or coarser
size category (table 241).

Vegetation was recorded at one station, and consisted
of algae and turtle grass.

Neither gravid nor juvenile specimens were collected.

548

Table 240. — Clrrlformla sp. A — Locality records and number
of individuals from survey stations, Tampa Bay,
Florida, 1963-69 (D-dredge, S-shovel, N-net)

6-2

Old Tampa Bay

Stations Individuals Stations Individuals
D S N D S N

Upper Tampa Bay

11-15

16-2

17-14

Boca Ciega Bay

Lower Tampa Bay

549

Table 241. — Cirriformia sp. A — Mean and range of observed
environmental factors from survey stations,
Tampa Bay, Florida, 1963-69

Factor

Mean

Water temperature (*C.)

Salinity (*.)

pH

Depth (m. )

Sediment type

Granules <wt. *)

Sands (wt. %)

Silts (wt. %)

Clay (wt. *)

CaC03 (wt. %)

Organic carbon (wt. %)

Organic nitrogen (wt. %)

Mean grain size,
total sample (0)

Standard deviation,
total sample (0)

Skewness, total sample

Kurtosis, total sample

Mean grain size,
noncarbonate fraction (0)

Standard deviation,
noncarbonate fraction (0)

Mean grain size,
carbonate fraction (0)

Standard deviation,
carbonate fraction (0)

Range

Number
observations

26.2

18.0 to 31.8

3

26.1

23.8 to 29.9

3

8.1

7.8 to 8.3

3

2.0

Zl to 3 . 0

3

sand

shelly sand
to sand

3

16.0

0.02 to 41.5

3

78.8

43.7 to 99.2

3

3.2

0.0 to 9.2

3

1.9

0.0 to 5.6

3

23.4

1.8 to 36.5

3

2.7

1.1 to 4.3

3

0.2

0.1 to 0.2

3

1.7

0.9 to 2.7

1.8

0.6

to

3.S

0.6

-0.5

to

1.9

11.3

-0.4

to

34.2

3.4

3.0

to

4.1

1.8

1.7

to

2.0

-0.1

-1.7

to

1.0

1.3

1.1

to

1.5

3
3
3

3

3

3

3

550
Clrrlformia sp. B
This cirratulid has lateral lobes on the prostomium.
Ventrally, acicular hooks arise about setiger 15 and con-
tinue to the end of the body. Dorsally, acicular hooks
arise about setiger 25 (figure 11, J) . Simple, capillary
setae are present in notopodla and neuropodla of all seg-
ments.

This species was found at two survey stations in
upper Tampa Bay and at one in lower Tampa Bay (table 242).

Average sediment type at dredge and shovel stations
was poorly sorted, fine sand. The percentage of shell
was over 2 3, silt and clay were virtually absent, and or-
ganic carbon was less than one percent (table 243).

Algae were recorded at one station and were the only
plants noted.

No gravid worms were seen and no juveniles were
collected.

551

Table 242. — Clrriformla sp. B — Locality records and number
of individuals from survey stations, Tampa Bay,
Florida, 1963-69 (D-dredge, S-shovel, N-net)

Upper Tampa Bay

Stations

Individuals Stations

Individuals

D S N

D S N

10-3

4 11-1

1

Lower Tampa Bay

15-26

1

552

Table 243. — Clrrlformia sp. B — Mean and range of observed
environmental factors from survey stations,
Tampa Bay, Florida, 1963-69

Factor

Mean

Range

Number
observations

Water temperature (*C.)

Salinity (.%.)

PH

Depth (m.)

Sediment type

Granules (wt. %)

Sands (wt. %)

Silts (wt. %)

Clay (wt. %)

CaC03 (wt. %)

Organic carbon (wt. %)

Organic nitrogen (wt. %)

Mean grain size,
total sample (0)

Standard deviation,
total sample (0)

Skewness, total sample

Kurtosis, total sample

Mean grain size,
noncarbonate fraction (0)

Standard deviation,
noncarbonate fraction (0)

Mean grain size,
carbonate fraction (0)

Standard deviation,
carbonate fraction (0)

27.9

24.1

to 31.5

3

26.1

22.7

to 32.3

3

7.8

7.8

to 8.0

3

1.0

D-

to 2.3

3

sand

shelly sand
to sand

3

9.6

0.7

to 21.5

3

89.7

78.5

to 98.7

3

0.5

0.0

to 1.0

3

0.2

0.0

to 0.4

3

23.8

0.9

to 46.9

3

0.6

0.2

to 1.2

2

0.07

0.02 to 0.1

2

1.5 0.8 to 2.4

1.5

0.7

to

2.3

3

0.1

-0.5

to

0.2

3

9.4

-0.2

to

26.4

3

3.0

2.4

to

3.8

3

1.5

1.0

to

2.3

3

0.7

-1.8

to

0.5

3

1.5

1.0

to

1.7

3

553

Tharyx sp. A
In this species the capillary setae of anterior seg-
ments have a fine, spinous edge (figure 11, K). This
spinous margin disappears in median and posterior capil-
laries, which are entirely smooth. A pair of indistinct
eyes was noted on the prostomium.

A single individual was collected in lower Tampa Bay
(table 244).

At that station, the sediment was moderately sorted,
medium sand that had very little shell, less than one
percent silt and clay, and less than one percent organic
carbon (table 245) .

Vegetation at the station consisted of algae and
turtle grass.

No data are available concerning reproduction in
this species.

554

Table 244. — Tharyx sp. A — Locality records and number of
individuals from survey stations, Tampa Bay,
Florida, 1963-69 (D-dredge, S-shovel, N-net)

Lower Tampa Bay

Stations

Individuals Stations

Individuals

D S N

D S N

16-25

1

555

Table 245. — Tharyx sp. A — Mean and range of observed

environmental factors from survey stations,
Tampa Bay, Florida, 1963-69

Factor

Mean

Water temperature (*C.) 21.0

Salinity (X.) 30.5

PH 8.2

Depth (m.) 0.3

Sediment type sand

Granules (wt. %) 1.0

Sands (wt. %) 98.3

Silts (wt. X) 0.6

Clay (wt. %) 0.2

CaC03 (wt. %) 5.1

Organic carbon (wt. %) 0.5

Organic nitrogen (wt. %) 0.6

Mean grain size,

total sample (0) 1.9

Standard deviation,

total sample (0) 0.9

Skewness, total sample 0.2

Kurtosis, total sample 9.6

Mean grain size,

noncarbonate fraction (0) 2.3

Standard deviation,

noncarbonate fraction (0) 0.9

Mean grain size,

carbonate fraction (0) -0.1

Standard deviation,

carbonate fraction (0) 1.2

Range

Number
observations

556
Tharyx sp. B

This worm was distinguished from other members of the
genus by the presence of smooth capillary setae on all
setlgers.

It was collected at one station in Boca Ciega Bay and
another in lower Tampa Bay (table 246).

Sediment in both localities was poorly sorted, medium
sand. The shell content was moderately high, but percent-
ages were low in the silt, clay, and organic carbon cate-
gories (table 247) .

Algae were present at one station. No sea grasses
were noted.

No gravid specimens were collected, and no juveniles
were observed.

557

Table 246. — Tharyx sp. B — Locality records and number of
individuals from survey stations, Tampa Bay,
Florida, 1963-69 (D-dredge, S-shovel, N-net)

BC-N

15-31

Boca Ciega Bay

Stations Individuals Stations Individuals

Lower Tampa Bay

558

Table 247,— Tharyx sp. B — Mean and range of observed

environmental factors from survey stations,
Tampa Bay, Florida, 1963-69

Factor

Water temperature (*C.)

Salinity {%.)

PH

Depth (m. )

Sediment type

Granules (wt. %)

Sands (wt. %)

Silts (wt. %)

Clay (wt. %)

CaC03 (wt. %)

Organic carbon (wt. %)

Organic nitrogen (wt. %)

Mean grain size,
total sample (0)

Standard deviation,
total sample (0)

Skewness, total sample

Kurtosis, total sample

Mean grain size,
noncarbonate fraction (0)

Standard deviation,
noncarbonate fraction (0)

Mean grain size,
carbonate fraction (0)

Standard deviation,
carbonate fraction (0)

Number

Mean

" Ranqe

observations

20.8

17.5 to

24.0

2

31.3

30.4 to

32.2

2

8.1

8.0 to

8.3

2

1.5

£1 to

2.3

2

sand

—

2

9.6

4.5 to

14.7

2

88.4

83.5 to

93.4

2

1.7

1.5 to

1.9

2

0.3

0.3 to

0.4

2

29.4

20.7 to

38.2

2

0.3

0.2 to

0.4

2

0.03

—

2

1.6

1.4 to

1.8

2

1.7

1.5 to

1.9

2

-0.1

-0.3 to

0.1

2

2.6

0.9 to

4.2

2

2.4

2.2 to

2.7

2

0.8

0.7 to

0.9

2

0.8

0.2 to

1.5

2

0.7

0.2 to

1.2

2

559
Tharyx sp. C

In this species the anterior setae are all smooth
capillaries. Capillary setae with a serrate margin ap-
pear only in neuropodia of median and posterior segments
(figure 11, L) .

Specimens were collected in all areas of the Estuary
at 85 survey stations and at four incidental localities in
Boca Ciega Bay, upper Tampa Bay, and lower Tampa Bay (table
248).

The worms were taken in a wide range of sediments be-
tween shelly sand and clayey silt. Average sediment type
was very fine, poorly sorted sand. The mean percentage of
silt and clay was nearly 15 percent, and the content of
organic carbon approached one percent. Shell comprised
nearly 15 percent of the sediment (table 249).

Thirty-two of 53 bottom samples contained algae as
well as one or more of all five species of sea grasses
found in the Estuary.

No juveniles or specimens, with mature gametes were
collected.

560

Table 248. — Tharyx sp. C — Locality records and number of
individuals from survey stations, Tampa Bay,
Florida, 1963-69 (D-dredge, S-shovel, N-net)

Old Tampa Bay

Stations Individuals Stations Individuals

1-4 6 6-1-C 1

3-1-A 1 6-7-A 2

4-2 5

Hillsborough Bay

Upper Tampa Bay

10-4 1 H_17 x

11-6 1 11-18 1

H-8 3 11-20 35

H-9 136 H.22 8

H-ll 14 11-25 10

11-12 1 11_26 7

11-13 1 H_27 2

H-15 2 13-1-A

C-2 2 10-20 2

10-15 5 10-21 1

10-16 6 10-22 3

10-19 22

561

Table 248. — Tharyx sp. C — Locality records and number of
Individuals from survey stations, Tampa Bay,
Florida, 1963-69 (D-dredge, S-shovel, N-net)-
( continued)

Boca Ciega Bay

Stations

Individuals Stations

Individuals

0 S N

0 S N

BC-A

126

BC-C

1

BC-H

1

BC-I

2

BC-N

1

D-2

65

D-3

14

D-4

1

D-S

D-6

239

D-7

1

D-9

19

D-10

46

D-ll

48

D-12

1

D-17

1

D-19-A

5

D-22

113

D-23

49

D-2 5

1

PB-1

3

PB-l-A

15

PB-4

3

10

14-2

101

14-3

2

14-4

38

15-3

1

29

15-4

38

15-5

37

15-6

38

15-8

51

15-9

4

15-11

9

15-12

76

15-13

285

15-14

13

15-15

15-16

1

15-17

1

16-1

17

16-2

43

16-4

1

16-5

7

16-6

3

16-8

1

Terra Ceia Bay

12

38

E-6
E-7

Lower Tampa Bay

14-19
15-18
16-13
16-25

16-26
16-27
17-4
17-6

19

562

Table 249. — Tharyx sp. C-- Mean and range of observed

environmental factors from survey stations,
Tampa Bay, Florida, 1963-69

Factor

Mean

Range

Number
observations

Water temperature (*C.)

Salinity (%. )

PH

Depth (m.)

Sediment type

Granules (wt. %)

Sands (wt. %)

Silts (wt. %)

Clay (wt. %)

CaC03 (wt. %)

Organic carbon (wt. %)

Organic nitrogen (wt. %)

Mean grain size,
total sample (0)

Standard deviation,
total sample (0)

Skewness, total sample

Kurtosis, total sample

Mean grain size,
noncarbonate fraction (0)

Standard deviation,
noncarbonate fraction (0)

Mean grain size,
carbonate fraction (0)

Standard deviation,
carbonate fraction (0)

24.7

13.0 to 33.2

85

29.6

18.5 to 34.8

85

8.1

7.1 to 8.4

80

1.1

£1 to 4.0

85

sand

shelly sand to
clayey silt

84

2.5

0.0 to 41.5

84

82.9

4.6 to 99.4

84

9.6

0.2 to 89.4

84

4.9

0.0 to 47.0

84

14.9

1.0 to 66.0

84

0.8

0.01 to 6.9

55

0.05

0.00 to 0.2

55

3.1 0.7 to 7.3 84

1.5 0.6 to 3.5 84

0.3 -1.7 to 3.4 84

7.4 -0.9 to 73.5 84

3.0 1.7 to 8.7 77

1.3 0.4 to 3.1 77
-0.1 -2.5 to 2.4 73

1.4 0.4 to 3.1 72

Figure 11. — Diagnostic features of Clrratulus sp. A,

Cirratulus sp. B, Clrratulus sp. C, Cirra-
tulus sp. D, Cirriformla sp. A, Clrriformla
sp. B, Tharyx sp. A, and Tharyx sp. C

Clrratulus sp. A:

Clrratulus sp. B:

Clrratulus sp. C:

Clrratulus sp. D:

Clrriformla sp. A:

Clrriformla sp. B:

Tharyx sp. A:

Tharyx sp. C:

(A) Bifid, acicular setae from
median neuropodium (B) Bifid,
acicular setae from median notopodium

(C) Bifid, acicular setae from
median neuropodium

(D) Acicular setae from anterior
neuropodium (E) Acicular setae from
posterior notopodium (F) Spinous,
capillary seta from anterior
notopodium (G) Pygidium in ventral vie'
(H) Bifid, acicular and capillary
setae from posterior neuropodium

(I) Acicular setae from median

neuropodium

(J) Acicular setae from posterior

neuropodium

(K) Spinous, capillary seta from

anterior notopodium

(L) Serrate, capillary seta from

posterior neuropodium.

564

FIGURE 11

C

0.02 MM 0.01 MM 0.01 MM

0.05MM

0.02 MM 0.01 MM

565
Family FLABELLIGERIDAE Saint-Joseph, 1894

Flabelligerids are generally found in temperate to
tropical waters, and have a world-wide distribution.
They feed on bottom deposits, and live in sediments or
crevices.

A single species, Pherusa arenosa. was found in
Tampa Bay .

Pherusa arenosa (Webster, 1879b)

Specimens were collected at a total of 11 survey
stations in areas of the Estuary from upper Tampa Bay
to lower Tampa Bay (table 250).

Average sediment type was poorly sorted, fine sand
that contained nearly 15 percent shell, less than five
percent silt and clay, and very little organic carbon
(table 251) .

One-half of the bottom samples contained algae, but
no sea grasses were noted.

No juvenile specimens were collected, and no di-
sections were made to determine the maturity of gametes.

P_i. arenosa is known from the east coast of the United
States, but has not been previously recorded in the Gulf
of Mexico.

566

Table 250. — Pherusa arenosa — Locality records and number

of individuals from survey stations, Tampa Bay,
Florida, 1963-69 (D-dredge, S-shovel, N-net)

Upper Tampa Bay

Stations

Individuals Stations

Individuals

D

S

N

D S N

10-6

1

11-5

1

Boca Ciega Bay

15-14

1

Terra Ceia Bay

E-l

1 E-7

1

Lower Tampa Bay

14-9

14-11

14-13

2

1
1

16-10
16-27
18-3

5
1
2

567

Table 251. — Pherusa arenosa — Mean and range of observed
environmental factors from survey stations,
Tampa Bay, Florida, 1963-69

Factor

Mean

Range

Number
observations

Water temperature (*C.) 22.6

Salinity (X.) 29.8

PH 8.0

Depth (m. ) 1.9

Sediment type sand

Granules (wt. %) 5.2

Sands (wt. %) 91.3

Silts (wt. %) 2.6

Clay (wt. %) 1.0

CaC03 (wt. %) 14.6

Organic carbon (wt. %) 0.4

Organic nitrogen (wt. %) 0.01

Mean grain size,

total sample (0) 2.2

Standard deviation,

total sample (0) 1.5

Slcewness, total sample 0.4

Kurtosis, total sample 8.7

Mean grain size,

noncarbonate fraction (0) 2.9

Standard deviation,
noncarbonate fraction (0) 1.3

Mean grain size,

carbonate fraction (0) -0.5

Standard deviation,

carbonate fraction ((B) 1.3

15.0 to 30.5

21.0 to 34.6

7.8 to 8.3

£1 to 3.0

shelly sand
to sand

0.1 to 20.8

77.3 to 99.2

0.3 to 6.2

0.1 to 3.2

1.4 to 43.3

0.04 to 2.8

0.00 to 0.02

0.9 to 2.9

0.6 to 2.0
-0.5 to 1.9
-0.03 to 27.7

1.9 to 4.4

0.6 to 2.2

-2.5 to 1.0

0.9 to 1.8

10
10
10
10
10

10
10
10
10
10
8
8

10

10
10
10

10

10

10

10

568
Family OPHELIIDAE Malmgren, 1867

The ophelids Inhabit sediments in seas throughout
the world where they feed on organic material contained
in bottom deposits.

Three species were found in Tampa Bay. Ammotrypane
aulogaster was found only as far into"the Estuary as
upper Tampa Bay, while the range of Armandia agllis and
Travisia sp. extended as far as Old Tampa Bay. None of
the three were found in Hillsborough Bay.
Key to OPHELIIDAE Collected in Tampa Bay

1 Body has distinct, ventral and lateral grooves;
pygidium prominent 2

- Grooves absent; pygidium knob-like Travisia sp.

2 Eyes present in lateral grooves Armandia agilis

- Lateral grooves have no eyes Ammotrypane aulogaster

Ammotrypane aulogaster Rathke, 1843
(Described and illustrated by Hartman, 1969)

A single specimen was collected in upper Tampa Bay,
and the other 23 records came from survey stations in
Boca Ciega Bay and lower Tampa Bay (table 252).

All collections came from shelly sand or sand. As
an average, the sediment was poorly sorted, fine sand
that contained about 14 percent shell. The percentage
of silt and clay was small, as was the percentage of

569
organic carbon (table 253).

Seven of 20 bottom samples contained vegetation that
consisted of algae and one or more of three sea grasses —
shoal grass, turtle grass, and manatee grass.

No information was obtained on the worm's repro-
ductive habits.

A. auloqaster was originally described from Norway
and has also been recorded from the east and west coasts
of the United States, it has not been previously re-
ported from the Gulf of Mexico.

570

Table 252. — Ammotrypane auloqaster — Locality records and
number of individuals from survey stations,
Tampa Bay, Florida, 1963-69 (D-dredge, S-
shovel, N-net)

Upper Tampa Bay

Stations

Individuals Stations

Individuals

D S N

D S N

13-2

1

Boca Ciega Bay

BC-E

2

BC-H

1

BC-I

1

BC-M

2

BC-N

12

D-17

2

D-25 1

PB-1 1

PB-4 37
PB-5 7

14-4 1

15-9 1

Lower Tampa Bay

14-5

14-8

1

15-25

1

16-10

1

17-9

10

17-10

35

17-12

56

17-13

19

17-14

23

18-3

4

18-4

1

571

Table 253.— Ammotry pane auloqaster — Mean and range of
observed environmental factors from survey
stations, Tampa Bay, Florida, 1963-69

Factor

Mean

Ranqe

Number
observations

Water temperature (

•c.

)

20.7

17.0 to 26.8

20

Salinity (%.)

31.9

28.5 to 34.8

20

PH

8.1

7.8 to 8.5

20

Depth (m.)

1.2

O- to 3.0

20

Sediment type

sand

shelly sand
to sand

20

Granules (wt. %)

4.0

0.02 to 20.8

20

Sands (wt. %)

93.5

77.4 to 99.8

20

Silts (wt. %)

1.8

0.1 to 7.9

20

Clay (wt. *)

0.7

0.02 to 4.8

20

CaC03 (wt. %)

14.4

1.1 to 52.3

20

Organic carbon (wt.

%)

0.4

0.01 to 4.3

19

Organic nitrogen (w

t.

%)

0.03

0.00 to 0.2

19

Mean grain size,
total sample (0)

Standard deviation,
total sample (0)

Skewness, total sample

Kurtosis, total sample

Mean grain size,
noncarbonate fraction (0)

Standard deviation,
noncarbonate fraction (0)

Mean grain size,
carbonate fraction (0)

Standard deviation,
carbonate fraction (0)

2.3

0.9 to 3.4

2.7

1.4 to 4.4

1.2 0.2 to 2.7
0.6 -1.3 to 2.3
0.9 0.2 to 1.4

20

1.2

0.5 to 2.0

20

0.3

-1.7 to 1.9

20

11.8

-0.03 to 34.3

20

19

19

15

15

572

Armandia agilis (Andrews, 1891)
(Described and illustrated by Renaud, 1956)

Specimens were collected at 36 survey stations in
lower Tampa Bay, one in Terra Ceia Bay, and five in Boca
Ciega Bay. In additon, there were collections at two
incidental localities in Boca ciega Bay, and one on a
sandy shoal south of Gandy Bridge in Old Tampa Bay (table
254) .

Average sediment type at dredge and shovel stations
was poorly sorted, fine sand that had a high percentage of
shell, and only small amounts of silt and clay. The organic
carbon content was nearly one percent (table 255) .

One-half of the bottom samples contained algae and
one or more sea grasses that included manatee, turtle, and
shoal grass.

Juvenile worms were collected in October, but no
gravid specimens were noted.

This species has been collected in the Gulf of Mexico
and is otherwise known from the east coast of the United
States.

573

Table 254. — Armandla aqllis — Locality records and number

of individuals from survey stations, Tampa Bay,
Florida, 1963-69 (D-dredge, S-shovel, N-net)

Boca Ciega Bay

Stati

ons

Individuals Stations

Individuals

D

S

N

D S N

BC-N

D-2

14-4

1
1
4

16-6
16-7

14

4

Terra Ceia Bay

E-8

1

Lower Tampa Bay

14-5

9

14-6

2

14-7

1

14-9

6

14-10

6

14-12

4

14-13

9

14-14

3

14-15

2

14-16

13

14-17

2

15-22

1

15-23

1

15-27

2

15-29

2

15-30

1

15-31

2

16-11

33

16-13

22

16-15

10

1

16-16

12

16-17

12

16-19

5

16-20

2

1

16-21

4

16-23

2

16-24

1

16-26

1

17-2

7

17-4

3

17-5

4

1

17-6

99

4

17-7

25

17-8

40

1

18-3

14

18-4

1

574

Table 255«--Armandla agills— Mean and range of observed
environmental factors from survey stations,
Tampa Bay, Florida, 1963-69

Factor

Mean

Range

Number
observations

Water temperature (

•c.)

22.2

15.0 to 29.4

42

Salinity (%.)

32.1

29.5 to 34.5

41

PH

8.0

7.8 to 8.3

42

Depth (m. )

1.7

£1 to 4.0

42

Sediment type

sand

shelly sand
to sand

41

Granules (wt. %)

4.4

0.1 to 28.8

41

Sands (wt. %)

93.5

68.8 to 99.2

41

Silts (wt. %)

1.6

0.2 to 4.7

41

Clay (wt. %)

0.5

0.0 to 2.2

41

CaC03 (wt. %)

26.7

2.4 to 65.5

41

Organic carbon (wt.

%)

0.7

0.1 to 5.0

39

Organic nitrogen (w

t. %)

0.04

0.00 to 0.2

39

Mean grain size,
total sample (0)

2.0

0.9 to 3.1

41

Standard deviation,
total sample (0)

Skewness, total sample

Kurtosis, total sample

Mean grain size,
noncarbonate fraction (0)

Standard deviation,
noncarbonate fraction (0)

Mean grain size,
carbonate fraction (0)

Standard deviation,
carbonate fraction (0)

1.4 0;8 to 3.0 41

0.05 -1.7 to 1.0 41

6.6 -0.8 to 31.9 41

2.8 1.9 to 5.5 40

1.3 0.6 to 3.2 40

0.4 -1.7 to 2.1 34

1.1 0.4 to 1.9 34

575

Travisia sp.
This undetermined ophelid resembles Travisia carnea.
which was described from New England and has been col-
lected as far south as Virginia. The species from Tampa
Bay has 30 or more setigers, and branchial filaments that
begin on setlger three and project from all except the last
few segments (figure 12, A) .

Specimens were collected at a total of 136 survey sta-
tions in all areas of the Estuary except Hillsborough Bay.
Large collections of the worm were common, and 458 were
taken in a single dredge haul at station 13-10 in upper
Tampa Bay. Other specimens came from two incidental col-
lections in Old Tampa Bay and one in lower Tampa Bay
(table 256).

The only bottom sample that contained soft sediment
(sandy clay) came from Port Tampa on a clay bank covered
with a thin layer of sand. All other sediments from which
specimens were taken consisted of shelly sand or sand.
Average bottom type was poorly sorted, fine sand. The
shell fraction contained some large fragments, and account-
ed for more than 14 percent of all sediment particles. Silt
and clay percentages were low, but organic carbon approach-
ed one percent (table 257).

576
Algae were present in 40 percent of the bottom samples
along with one or more of all sea grasses found in the Es-
tuary except Halophila.

Juvenile specimens were collected in June, but no
gravid worms were noted.

577

Table 256. — Travisla sp. — Locality records and number of
individuals from survey stations, Tampa Bay,
Florida, 1963-69 (D-dredge, S-shovel, N-net)--
( continued)

Boca Ciega Bay

Stations

Individuals Stations

Individuals

D s N

D S N

BC-E
BC-M
BC-N

12

15-8

15-17

16-1

14-3

13

16-6

42

Terra Ceia Bay

E-4
E-5

1
27

E-8

51

578

Table 256. — Travlsla sp. — Locality records and number of
individuals from survey stations, Tampa Bay,
Florida, 1963-69 (D-dredge, S-shovel , N-net)

Old Tampa Bay

Stations

Individuals

Stations

Individuals

3-8

22

3-9

72

3-10

85

3-11

37

3-12

17

3-13

3

4-10

2

4-16

16

4-1 7-A

4

4-18-A

59

4-19

4

5-5

156

5-6

53

5-7

42

5-8

107

5-9

135

5-10

14

5-11

95

5-12

38

5-13

47

6-1-A

8

6-1-B

55

6-1-C

28

6-2

18

6-3

200

6-4-A

6

6-5

162

6-6

91

6-7-A

11

Upper Tampa Bay

D

6

D-28

1

10-1-A

41

10-2

4

10-3

32

10-4

7

10-5

1

10-6

128

10-7

39

10-8

132

10-9

130

10-10

81

10-11

37

10-12

51

10-13

1

11-1

3

11-2

25

11-3

22

11-4

34

11-5

11

11-6

1

12-1

2

12-2

23

12-3

2

12-4

2

12-5

8

12-6

3

12-7

4

12-8

8

12-9

2

12-10

3

12-11

1

12-12

1

12-16

1

13-1-A

22

13-1-B

2

13-5

69

13-6

1

13-7

1

13-8

1

13-10

458

579

Table 256.— Travisia sp.— Locality records and number of
individuals from survey stations, Tampa Bay,
Florida, 1963-69 (D-dredge, S-shovel, N-net)--
(continued)

Lower Tampa Bay

Stations

Individuals Stations

Individuals

D S N

D S N

D-2 7

14-5

390

14-6

16

14-7

13

14-8

20

14-9

4

14-10

3

14-11

2

14-12

18

14-13

1

14-14

1

14-15

19

14-16

3

14-17

17

14-20

15-18

349

15-19

70

15-20

5

15-21

42

15-22

7

15-23

2

15-25

3

15-26

10

15-27

20

15-28

34

15-29

12

15-30

90

15-31

69

15-32

15

15-33

111

16-9

123

16-9-A

28

16-9-B

13

16-10

5

16-13

5

16-15

5

16-16

24

16-17

4

16-19

1

16-23

17

16-24

78

16-27

33

17-1

4

17-2

1

17-4

2

17-5

1

17-6

3

17-7

1

17-8

21

17-10

4

17-11

57

17-12

41

17-13

2

17-14

1

18-4

9

580

Table 257. — Travisia sp. — Mean and range of observed

environmental factors from survey stations,
Tampa Bay, Florida, 1963-69

Factor

Mean

Ranqe ob.

Number
servatlons

Water temperature (

•c.)

24.2

13.0 to 33.8

136

Salinity (%„)

26.1

18.5 to 34.5

135

PH

8.0

7.7 to 8.3

127

Depth (m. )

1.3

O- to 4.0

136

Sediment type

sand

shelly sand to
sandy clay

131

Granules (wt. %)

2.1

0.0 to 28.8

131

Sands (wt. %)

95.9

24.5 to 100

131

Silts (wt. %)

1.1

0.0 to 5.6

131

Clay (wt. %)

0.9

0.0 to 65.9

130

CaC03 (wt. %)

14.6

0.6 to 66.0

131

Organic carbon (wt.

X)

0.8

0.03 to 8.5

101

Organic nitrogen (w

t. %)

0.05

0.00 to 0.3

101

Mean grain size,
total sample (0)

Standard deviation,
total sample (0)

Skewness, total sample

Kurtosls, total sample

Mean grain size,
noncarbonate fraction (0)

Standard deviation,
noncarbonate fraction (0)

Mean grain size,
carbonate fraction (0)

Standard deviation,
carbonate fraction (0)

2.3 0.8 to 7.1 131

1.1 0.4 to 3.0 131

0.4 -1.7 to 3.6 131

15.2 -0.8 to 78.2 131

3.1 1.7 to 9.0 130

1.4 0.5 to 3.4 130
-0.1 -2.5 to 2.5 110

1.3 0.2 to 2.1 110

581
Family CAPITELLIDAE Grube, 1862

This moderately large family has representative
species in all seas. Capitellids are burrowing worms
that feed on bottom deposits. Certain members of the
genus Capitella have received considerable attention in
recent years because they can withstand low levels of
dissolved oxygen and may be the only polychaetes present
in areas that are heavily polluted by organic matter, such
as sewage .

Nine species were collected in Tampa Bay. The only
one that was found exclusively in saline waters near the
Gulf was Scyphoproctus platyproctus . The other eight
species were taken in at least one area from the upper
and lower reaches of the Estuary (Capitella capitata,
Capitellides jonesi, Capitomastus aciculatus, Dasybranchus
lumbricoides, Dasybranchus lunulatus, Heteromastus
filiformis, Notomastus hemipodus, and Notomastus
latericeus) .
Key to CAPITELLIDAE Collected in Tampa Bay

1 Thoracic region consists of 9 setigers 2

Thoracic region consists of more than

9 setigers 3

2 Setae occur on the peristomium; first 2

setigers bear acicular spines. . .Capitomastus aciculatus

582

Setae occur on the peristomium; first 2

setigers have capillary setae only Capltella capitata

Peristomium has no setae; prostomlum has a pair

of distinct eye-spots; first 2 setigers have

only capillary setae Capltellides -jonesi

3 Thoracic region consists of 11 setigers 4

Thoracic region consists of 12 or 13 setigers 6

4 Thoracic setigers contain capillary setae and
hooded hooks beginning on the sixth

setlger Heteromastus flliforrois

- Thoracic setigers have capillary setae only 5

5 First setiger has both notosetae and

neurosetae Notomastus latericeus

- First setiger has notosetae, but no

neurosetae Notomastus hemipodus

6 Thoracic region consists of 12 setigers;
body terminates in an anal plaque that

bears aclcular spines Scyphoproctus platyproctus

Thoracic region consists of 13 setigers;

abdominal branchiae appear as filamentous

tufts Dasybranchus lumbricoides

- Thoracic region consists of 13 setigers;
abdominal branchiae appear as one or

several filaments Dasybranchus lunulatus

Capitella capitata (Fabricius, 1780)
(Described and illustrated by Day, 1967)

Specimens were collected in all areas of the Estuary

at a total of 78 survey stations, and at five incidental

localities in Old Tampa Bay, Boca Ciega Bay, and lower

Tampa Bay. Collections of over 100 individuals per dredge

583
haul were made at three stations in Hillsborough Bay and
at one station in Boca Ciega Bay (table 258) .

Average bottom type at dredge and shovel stations
was poorly sorted, fine sand. It contained nearly 11
percent shell (including some large particles) about 10
percent silt and clay, and less than one percent organic
carbon (table 259).

Algae, and one or more of all five sea grasses found
in the Esfuary were collected in 28 of the 44 bottom
samples from which C. capita ta was taken.

No gravid specimens were noted, but juvenile worms
were collected in May and August.

This species is distributed throughout the world and
has been collected from the Gulf of Mexico.

584

Table 258. — Capitella capita ta — Locality records and number
of individuals from survey stations, Tampa Bay,
Florida, 1963-69 (D-dredge, S-shovel, N-net)

Old Tampa Bay

Stations

Individuals

Stations

Individuals

A-6

2

B-l

5

B-2

3

B-3

3

3-14

1

3-15

1

3-17

3

5-2

11

5-3

1

5-4 "

12

6-1-B

2

6-1-C

55

6-2

4

6-4-A

4

6-5

1

6-7-A

3

6-8

1

Hillsborough Bay

c

C-4

116

C-5

5

C-9

23

8-2

1

8-6

310

8-8

1

8-9

422

25

8-10

30

9-8

1

10-18

3

Upper Tampa Bay

10-0

10-11

16

10-12

24

10-13

16

10-14-A

10-14-B

3

11-1

11-3

1

11-5

1

11-6

1

11-7

1

11-27

11-28

25

11-28-1

76

13-1-A

2

13-13

1

585

Table 258. — Capltella capita ta — Locality records and number
of individuals from survey stations, Tampa Bay,
Florida, 1963-69 (D-dredge, S-shovel, N-net)-
( continued)

Boca

Ciega

Bay

Stations

Individuals

Stations

Individuals

D

S

N

D

S

N

BC-M

3

PB-

-4

3

1

D-l

6

PB-

-5

1

1

D-2

6

14-

-1-A

1

D-ll

3

14-2

2

D-l 2

12

15-

-1

5

D-l 3

3

15-

-2

11

D-14

1

15-

-5

1

D-l 5

3

6

15-

-10

7

D-16

2

15-

-11

1

D-l 7

1

16-

■1

1

D-18

3

16-

-3

35

D-20

1

16-

-4

125

1

D-21

1

16-

-5

98

D-2 5

1

16-

-6

8

PB-1

3

Terra

Ceia

Bay

E-2

14

Lower

Tampa Bay

15-18

2

16-

■25

2

16-14

1

16-

■28

1

586

Table 259. — Capitella capitata — Mean and range of observed
environmental factors from survey stations,
Tampa Bay, Florida, 1963-69

Factor

Mean

Number
Ranqe observations

Water temperature (

•c.)

27.3

12.8 to 34.1

72

Salinity (%.)

26.5

15.6 to 34.9

71

PH

8.0

7.2 to 8.4

65

Depth (m. )

0.7

£1 to 3.3

72

Sediment type

sand

shelly sand to
silty clay

72

Granules (wt. %)

3.9

0.0 to 72.9

72

Sands (wt. %)

86.0

5.0 to 99.9

72

Silts (wt. %)

6.9

0.0 to 66.2

72

Clay (wt. %)

3.0

0.0 to 46.5

72

CaC03 (wt. %)

10.7

0.6 to 75.6

71

Organic carbon (wt.

X)

0.6

0.1 to 2.2

31

Organic nitrogen (w

t. %)

0.04

0.00 to 0.2

31

Mean grain size,
total sample (0)

2.8

-1.9 to 7.2

71

Standard deviation,
total sample (0)

SJcewness, total sample

Kurtosis, total sample

Mean grain size,
noncarbonate fraction (0)

Standard deviation,
noncarbonate fraction (0)

Mean grain size,
carbonate fraction (0)

Standard deviation,
carbonate fraction (0)

1.3 0.5 to 2.7 71
0.5 -1.3 to 2.6 71

11.6 -1.5 to 43.8 71

3.0 1.9 to 8.4 66

1.5 0.4 to 2.3 66

-0.4 -2.5 to 1.9 62

1.4 0.6 to 2.8 62

587
Capitellides jonesi Hartman, 1959a

Specimens were taken at 42 survey stations in Old
Tampa Bay, Hillsborough Bay, upper Tampa Bay, Boca Ciega
Bay, and lower Tampa Bay. In addition, individuals were
collected at two incidental localities in lower Tampa
Bay (table 260) .

Although some specimens were found in very soft sedi-
ments, average figures show that the worm inhabits poorly
sorted, fine sand. The mean figure for silt and clay was
over eight percent, shell was under 10 percent, and organic
carbon was over one percent (table 261) .

One-third of the bottom samples contained algae and
one or more sea grasses that included shoal, manatee, and
turtle grass.

No specimens with mature gametes were observed, but
juvenile worms were collected in August and October.

As far as I know, C. jonesi was previously known
only from the type locality in St. Andrews Bay on the
Gulf coast of Florida, and from Biscayne Bay in southern
Florida.

508

Table 260. — Capitellldes jonesl — Locality records and

number of individuals from survey stations,
Tampa Bay, Florida, 1963-69 (D-dredge, S-
shovel, N-net)

Old Tampa Bay

Stations

Individuals Stations

Individuals

D

S

N

D

S

N

B-l

5

Hillsborough Bay

C-2
8-8
8-9
9-3

2

1

9-4
4 9-9

10-19
1 10-23

1
1
6

1

Upper Tampa Bay

10-1-A

10-11

11-1

11-3

11-4

3

1
2

1

11-9

11-11

17 11-27

1 12-10

13-13

4

9
9

1

1

3

Boca Ciega Bay

BC-A

BC-M

D-9

D-13

D-18

D-19-B

D-22

D-25

PB-1

PB-4

1

1
2

4
1

6

PB-5
1 14-4
15-3
15-4
15-11
15-15
16-1

1 16-2

2 16-7
5 16-8

10

1

1
6

81

2

1
1

22
3

1

Lower Tampa Bay

15-20
15-21

1
1

16-28

1

589

Table 261. — Capitellldes lonesl — Mean and range of observed
environmental factors from survey stations,
Tampa Bay, Florida, 1963-69

Factor

Mean

Range

Number
observations

Water temperature (*C.)

Salinity (%.)

PH

Depth (m.)

Sediment type

Granules (wt. %)

Sands (wt. %)

Silts (wt. *)

Clay (wt. %)

CaC03 (wt. %)

Organic carbon (wt. %)

Organic nitrogen (wt. %)

Mean grain size,
total sample (0)

Standard deviation,
total sample (0)

Skewness, total sample

Kurtosis, total sample

Mean grain size,
noncarbonate fraction (0)

Standard deviation,
noncarbonate fraction (0)

Mean grain size,
carbonate fraction (0)

Standard deviation,
carbonate fraction (0)

25.0

12.8 to 31.4

29

28.7

18.5 to 34.9

29

8.0

7.4 to 8.3

28

0.9

{X to 3 .0

29

sand

shelly sand to
clayey mud

28

2.1

0.0 to 9.7

28

89.9

26.9 to 99.9

28

5.5

0.0 to 32.8

28

2.7

0.0 to 39.2

28

9.4

0.6 to 50.5

28

1.2

0.03 to 8.5

20

0.04

0.01 to 0.2

20

2.8 0.5 to 6.5 28

1.3 0.5 to 2.5 28

0.3 -1.4 to 1.7 28

10.1 -0.4 to 41.2 28

3.5 1.9 to 9.0 28

1.5 0.6 to 2.4 28

0.1 -1.9 to 1.4 24

1.3 0.5 to 2.3 24

590
Capitomastus aclculatus Hartman, 1959a

Specimens were collected at a single survey station
in Hillsborough Bay, and at four survey stations and one
incidental locality in Boca Ciega Bay (table 262).

Sediment data show that the worm was found only in
fine or very fine sand. Average content of shell was
under 10 percent, and silt and clay fractions amounted
to between six and seven percent. Data for organic carbon
are not available (table 263).

Two bottom samples contained algae in addition to
shoal and turtle grass.

Neither gravid nor juvenile specimens were noted in
any collection.

C. aciculatus. as Capitellides jonesi. was described
from St. Andrews Bay on the Florida Gulf coast, and has
since been recorded only from Blscayne Bay, Florida.

591

Table 262.— Capltomastus aciculatus — Locality records and
number of individuals from survey stations,
Tampa Bay, Florida, 1963-69 (D-dredge, S-
shovel, N-net)

Hillsborough Bay

Stations

Individuals Stations

Individuals

D S N

D S N

9-1

10

Boca Ciega Bay

D-10
D-13

16 D-15
13 PB-4

22

1 1

592

Table 263. — Capitomastus aclculatus — Mean and range of
observed environmental factors from survey
stations, Tampa Bay, Florida, 1963-69

Factor

Mean

Range

Number
observations

Water temperature (*C.)
Salinity (*.)

PH

Depth (m.)

Sediment type

Granules (wt. %)

Sands (wt. %)

Silts (wt. %)

Clay (wt. %)

CaC03 (wt. %)

Organic carbon (wt. %)

Organic nitrogen (wt. %)

Mean grain size,
total sample (0)

Standard deviation,
total sample (0)

Skewness, total sample

Kurtosis, total sample

Mean grain size,
noncarbonate fraction (0)

Standard deviation,
noncarbonate fraction (0)

Mean grain size,
carbonate fraction (0)

Standard deviation,
carbonate fraction (0)

29.1

24.5

to

31.1

4

28.8

17.3

to

33.9

4

8.2

8.1

to

8.3

4

0.4

&

4

sand

—

4

0.6

0.0

to

2.0

4

92.8

88.2

to

98.4

4

5.0

1.1

to

8.9

4

1.6

0.5

to

2.8

4

8.6

0.5

to

16.2

4

2.7 2.5 to 3.1 4

1.2 0.8 to 1.7 4
0.9 0.4 to 2.2 4

11.8 2.4 to 35.7 4

2.6 2.1 to 3.0 3

1.3 1.2 to 1.5 3
-0.5 -1.0 to 0.05 3

1.4 0.9 to 1.9 3

593

Dasybranchus lumbricoides Grube, 1878
(Described and illustrated by Hartman, 1947a)

Aside from an incidental collection in Old Tampa Bay
(near Oldsmar) D. lumbricoides was found only in Boca
Ciega Bay and lower Tampa Bay at six survey and two inci-
dental locations (table 264) .

Average sediment type was poorly sorted, fine sand
that contained under five percent silt and clay, but more
than two percent organic carbon. The percentage of shell
was also high (table 265).

Algae were noted in one-half of the bottom samples,
together with one or more of the following sea grasses:
shoal grass, manatee grass, and turtle grass.

A juvenile specimen was collected in October, but no
gravid individuals were seen.

This species has been previously collected in the
Gulf of Mexico as well as the eastern Pacific, and the
western Atlantic between North Carolina and the Caribbean.

594

Table 264. — Dasybranchus lumbricoldes — Locality records

and number of Individuals from survey stations,
Tampa Bay, Florida, 1963-69 (D-dredge, S-
shovel, N-net)

Boca Ciega Bay

Stations

Individuals Stations

Individuals

D

S

N

D S N

D-6

D-11

D-19-A

1

1
3

1

D-23
PB-l-A

1
1

Lower Tampa Bay

17-3

1

595

Table 265. — Dasybranchus lumbricoides — Mean and range of
observed environmental factors from survey
stations, Tampa Bay, Florida, 1963-69

Factor

Mean

Range

Number
observations

Water temperature (*C.)

Salinity (.%.)

PH

Depth (m.)

Sediment type

Granules (wt. %)

Sands (wt. %)

Silts (wt. %)

Clay (wt. %)

CaC03 (wt. %)

Organic carbon (wt. X)

Organic nitrogen (wt. %)

Mean grain size,
total sample (0)

Standard deviation,
total sample (0)

Skewness, total sample

Kurtosis, total sample

Mean grain size,
noncarbonate fraction (0)

Standard deviation,
noncarbonate fraction (0)

Mean grain size,
carbonate fraction (0)

Standard deviation,
carbonate fraction (0)

26.4

18.0

to

30.8

8

31.9

23.3

to

34.1

8

8.2

8.0

to

8.3

8

0.6

D-

to

2.7

8

sand

—

8

1.9

0.0

to

5.6

8

93.7

87.9

to

98.9

8

3.3

0.3

to

7.2

8

0.5

0.0

to

1.0

8

22.9

3.5

to

85.2

8

2.9

0.3

to

6.9

3

0.1

0.01 tc

> 0.2

3

2.3

0.5 to 2.9

1.1

0.8

to

1.4

8

0.4

-0.7

to

1.5

8

7.8

1.7

to

22.6

8

2.8

2.1

to

3.4

6

1.4

1.0

to

1.8

6

0.0

-1.6

to

1.3

6

1.3

0.4

to

2.6

6

596

Dasybranchus lunulatus Ehlers, 1887
(Described and illustrated by Hartman, 1947)

Boca Ciega Bay was the only area of the Estuary where
this worm was collected at survey stations. Otherwise,
it was found at one incidental locality in Old Tampa Bay,
one in lower Tampa Bay, and at three in Boca Ciega Bay
(table 266).

Except for one station in silty sand, all dredge and
shovel collections came from sand. As an average, the
sand was fine and poorly sorted. It contained less than
10 percent shell, only about five percent silt and clay,
and less than one percent organic carbon (table 267).

Six of 13 bottom samples contained algae, and either
shoal grass or turtle grass.

Juvenile worms were collected in September and
November. No gravid specimens were noted.

D. lunulatus has been previously collected in the
Gulf of Mexico and has a known geographic range that ex-
tends from North Carolina to the Caribbean.

597

Table 266.-- Dasybranchus lunulatus — Locality records and
number of individuals from survey stations,
Tampa Bay, Florida, 1963-69 (D-dredge, S-
shovel, N-net)

Boca Ciega Bay

Stations

Individuals Stations

Individuals

D S N

D S N

BC-A-1

BC-C

BC-G

BC-H

D-l

D-2

D-3

12

D-6

1

D-9

4

D-ll

33

PB-l-A

1

PB-4

2

PB-5

2

598

Table 267. — Dasybranchus lunulatus — Mean and range of
observed environmental factors from survey
stations, Tampa Bay, Florida, 1963-69

Factor

Mean

Range

Number
observations

Water temperature (*C.)

Salinity (X.)

pH

Depth (m. )

Sediment type

Granules (wt. %)

Sands (wt. %)

Silts (wt. %)

Clay (wt. %)

CaC03 (wt. %)

Organic carbon (wt. %)

Organic nitrogen (wt. %)

Mean grain size,
total sample (0)

Standard deviation,
total sample (0)

Skewness, total sample

Kurtosis, total sample

Mean grain size,
noncarbonate fraction (0)

Standard deviation,
noncarbonate fraction (0)

Mean grain size,
carbonate fraction (0)

Standard deviation,
carbonate fraction (0)

22.5

15.5

to

30.0

13

31.9

23.3

to

34.3

13

8.2

8.0

to

8.4

13

0.5

O-

to

1.0

13

sand

sand
sand

to

silty

13

1.9

0.0

to

7.4

13

92.6

75.0

to

99.0

13

4.6

0.3

to

22.8

13

0.8

0.0

to

2.2

13

8.6

2.9

to

17.5

13

0.6

0.0]

. tc

i 1.0

7

0.05

o.o:

. tc

i 0.1

7

2.7 2.2 to 4.1

3.1

2.6 to 3.7

1.4 0.6 to 2.2

0.1 -1.9 to 2.1

1.3 0.4 to 2.6

13

1.3

0.7 to 2.4

13

0.4

-0.6 to 1.5

13

8.9

1.3 to 22.6

13

11

11

11

11

599

Heteromastus f lliformis (Claparede, 1864)
(Described and illustrated by Day, 1967)

H. f lllformis was the roost commonly found capitellid
in the Estuary, and occurred at a total of 128 survey
stations in all areas as well as at nine incidental local-
ities (table 268) .

Several collections came from soft sediments, but
most were taken in sand. Average sediment type was moder-
ately sorted, fine sand. The shell content was over 15
percent, silt and clay percentages were under five, and
organic carbon was nearly one percent (table 269).

Algae were noted in 60 of 132 bottom samples, together
with one or more sea grasses that included all of those
found in the Estuary except widgeon grass.

Gravid specimens were recorded in September and
December, and juveniles were collected from May to Decem-
ber as well as in February.

H. filiformis has been collected in the Gulf of Mexico
and has world-wide distribution.

600

Table 268.~Heteromastus f iliformis — Locality records and
number of individuals from survey stations,
Tampa Bay, Florida, 1963-69 (D-dredge, S-
shovel, N-net)

Old Tampa Bay

Stations

Individuals

Stations

Individuals

D

S

N

D

S N

A-2

8

4-20

3

A-3

1

5-3

5

A-5

13

5-4

1

A-6

8

5-10

1

B

1

5-13

4

B-2

1

6-1-D

4

B-3

2

6-2

76

1-1

1

6-3

7

4-7

1

6-5

2

4-16

2

6-8

1

Hillsborough

Bay

C-l

11

10-22

1

Upper

Tampa

Bay

D-28

9

12-2

6

10-0

4

12-3

1

10-1-A

6

12-7

2

10-3

18

12-8

18

10-4

5

12-9

3

10-6

5

12-10

18

10-7

2

12-11

23

11-1

2

12-12

45

11-2

2

12-14

4

11-3

2

12-15

7

11-4

18

13-1-A

16

11-9

4

13-3

32

11-16

4

2

13-5

71

11-20

1

13-6

3

11-28-1

4

13-8

3

12-1

1

13-10

39

601

Table 268. — Heteromastus f iliformis — Locality records and
number of individuals from survey stations,
Tampa Bay, Florida, 1963-69 (D-dredge, S-
shovel, N-net)-(continued)

Boca

Ciega

Bay

Stations

Individuals

Stations

Individ

uals

D

S

N

D

S

N

BC-A

2

15-2

22

BC-C

4

15-3

1

3

BC-G

6

15-4

14

BC-M

1

15-5

1

BC-N

2

15-6

1

D-2

13

15-8

1

D-3

2

15-9

2

D-6

41

15-10

1

D-7

5

15-12

1

D-ll

14

40

15-14

3

1

D-18

1

15-16

1

D-19-A

1

16-1

22

D-2 3

17

16-2

5

D-2 5

7

1

16-3

8

PB-1

7

1

16-4

1

PB-l-A

25

16-5

5

PB-4

8

1

10

16-6

30

PB-5

6

3

16-7

2

14-1-A

6

16-8

25

Terra Ceia

Bay

E-l

1

E-6

26

E-2

X

E-8

3

E-3

3

602

Table 268. — Heteromastus filiformls — Locality records and
number of individuals from survey stations,
Tampa Bay, Florida, 1963-69 (D-dredge, S-
shovel, N-net)-( continued)

Lower Tampa Bay

Stations

Individuals

Stations

Individuals

14-5

2

14-10

2

14-12

1

14-19

15-21

12

15-22

1

15-24

3

15-27

2

15-28

1

15-29

19

15-30

10

15-31

67

15-32

1

16-9-B

16-12

16-13

6

16-14

18

16-15

4

16-16

82

16-17

26

16-21

4

16-24

3

16-25

16-27

5

17-2

3

17-4

2

17-5

5

17-&

3

17-7

2

17-10

1

17-15

12

603

Table 269. — Heteromastus flliformls — Mean and range of
observed environmental factors from survey
stations, Tampa Bay, Florida, 1963-69

Factor

Mean

Range

Number
observations

Water temperature (*C.)

Salinity (%. )

PH

Depth (m. )

Sediment type

Granules (wt. %)

Sands (wt. %)

Silts (wt. %)

Clay (wt. %)

CaC03 (wt. %)

Organic carbon (wt. %)

Organic nitrogen (wt. %)

Mean grain size,
total sample (0)

Standard deviation,
total sample (0)

Skewness, total sample

Kurtosis, total sample

Mean grain size,
noncarbonate fraction (0)

Standard deviation,
noncarbonate fraction (0)

Mean grain size,
carbonate fraction (0)

Standard deviation,
carbonate fraction (0)

24.1

13.0

to

34.1

132

29.3

18.3

to

35.1

132

8.1

6.7

to

8.4

126

1.1

D-

to

4.0

132

sand

shelly £
to silt

land

129

2.3

0.0

to

21.5

129

93.2

5.5

to

99.9

129

3.4

0.0

to

89.4

129

1.0

0.0

to

9.1

129

IS. 6

0.7

to

75.1

129

0.8

0.1

to

8.5

91

0.1

0.00 tc

i 2.1

91

2.4

0.4

to

6.4

128

0.9

-1.4

to

2.9

128

0.3

-1.7

to

2.9

128

10.0

-0.2

tc

78.2

128

3.1

1.7

to

9.0

118

1.4

0.4

to

3.4

118

0.0

-2.5

to

2.4

102

1.3

0.4

to

2.9

102

604

Notomastus hemipodus Hartman, 1947
(Described and illustrated by Hartman, 1969)

Specimens were collected at a total of 26 survey
stations in all areas of the Estuary except Hillsborough
Bay. The only incidental collection was made in Boca
Ciega Bay near Johns Pass (table 270).

Average sediment type from bottom samples was poorly
sorted, fine sand. Only one collection came from soft
sediment, and that was a clay bank covered by a thin
layer of sand near Port Tampa in Old Tampa Bay. Very
little shell was present in most samples. The mean
amount of silt and clay was under 10 percent, and organic
carbon was nearly one percent (table 271) .

In addition to algae, shoal or manatee grass were
present in about one-third of the bottom samples.

A juvenile specimen was collected in July, but no
gravid worms were seen.

N. hemipodus has been found in the Gulf of Mexico
and is otherwise known from the eastern and western
coasts of the United States.

605

Table 270. — Notomastus hemipodus — Locality records and
number of individuals from survey stations,
Tampa Bay, Florida, 1963-69 (D-dredge, S-
shovel, N-net)

Old Tampa Bay

Stations

Individuals

Stations

Individuals

1-4

1

3-8

4

3-9

2

3-10

2

3-11

3

3-12

2

3-14

3

3-15

5

3-16

5

4-10

1

4-16

6

4-1 7-A

1

4-19

15

5-13

1

6-1-A

16

6-1-B

4

Upper Tampa Bay

10-4
11-6

4

1

11-28

3

Terra Ceia Bay

E-6

4

"

Lower Tampa Bay

16-9

16-9-A

16-22

8

13

2

16-23

17-9

17-11

1
2

27

606

Table 271. — Notomastus hemipodus — Mean and range of

observed environmental factors from survey
stations, Tampa Bay, Florida, 1963-69

Factor

Mean

Range

Number
observations

Water temperature (*C.)

Salinity (%.)

pH

Depth (m. )

Sediment type

Granules (wt. %)

Sands (wt. %)

Silts (wt. X)

Clay (wt. %)

CaC03 (wt. %)

Organic carbon (wt. %)

Organic nitrogen (wt. %)

Mean grain size,
total sample (0)

Standard deviation,
total sample (0)

Skewness, total sample

Kurtosis, total sample

Mean grain size,
noncarbonate fraction (0)

Standard deviation,
noncarbonate fraction (0)

Mean grain size,
carbonate fraction (0)

Standard deviation,
carbonate fraction (0)

27.4

13.0 to 32.0

26

26.4

23.0 to 32.4

26

8.0

7.1 to 8.2

18

1.0

£X to 3.0

26

sand

sand to
sandy clay

25

0.7

0.0 to 3.2

25

93.1

24.5 to 99.1

25

2.8

0.4 to 10.5

25

3.8

0.1 to 65.9

25

3.2

0.7 to 17.9

25

0.8

0.1 to 2.5

15

0.05

0.01 to 0.1

15

2.8

1.9 to 7.1

1.2 0.7 to 2.7
1.0 -1.4 to 2.6

17.5 -0.6 to 43.8

2.8 1.9 to 7.1

1.5 0.7 to 2.2

-0.7 -2.5 to 2.5

1.3 0.9 to 1.7

25

25
25

25

25
25
24
24

607

Notomastus latericeus Sars, 1851
(Described and illustrated by Day, 1967)

Eight of the 17 survey stations where N. latericeus
was collected were located in Boca Ciega Bay. The other
nine were from all other areas of the Estuary except
Hillsborough Bay (table 272).

One collection was made in silty sand, and all others
came from sand. Average sediment type was poorly sorted,
fine sand that had little silt and clay, only seven per-
cent shell, and over one percent organic carbon (table
273).

Less than one-half of the bottom samples contained
algae, and one or more sea grasses that included shoal,
manatee, and turtle grass.

Juvenile specimens were collected in September, Oc-
tober, and November, but no gravid worms were seen.

This species has been collected in the Gulf of
Mexico, and is otherwise known from localities through-
out the world.

608

Table 272. — Notomastus latericeus — Locality records and
number of individuals from survey stations,
Tampa Bay, Florida, 1963-69 (D-dredge, S-
shovel, N-net)

Old Tampa Bay

Stations

Individuals Stations

Individuals

0

S N

D S N

4-1

3 5-4

1

Upper Tampa Bay

11-6

1

Boca Ciega Bay

BC-I
D-23
15-1
15-2

1

4

15-4

1 15-9
15-10

2 15-12

1

2
1

6

Terra Ceia Bay

E-2

1

Lower Tampa Bay

14-16
15-32
17-8

1
1
2

17-13
17-14

3

1

609

Table 2 73. — Notomastus laterlceus — Mean and range of

observed environmental factors from survey
stations, Tampa Bay, Florida, 1963-69

Factor

Mean

Range

Number
observations

Water temperature (*C.)

Salinity (%. )

pH

Depth (m.)

Sediment type

Granules (wt. %)

Sands (wt. %)

Silts (wt. %)

Clay 'wt.%)

CaC03 (wt. %)

Organic carbon (wt. %)

Organic nitrogen (wt. %)

Mean grain size,
total sample (0)

Standard deviation,
total sample (0)

Skewness, total sample

Kurtosis, total sample

Mean grain size,
noncarbonate fraction (0)

Standard deviation,
noncarbonate fraction (0)

Mean grain size,
carbonate fraction (0)

Standard deviation,
carbonate fraction (0)

24.0

14.5 to 33.8

17

30.5

23.6 to 34.1

17

8.2

7.9 to 8.5

16

0.9

£1 to 3.0

17

sand

sand to silty
sand

17

2.0

0.02 to 9.7

17

93.0

. 83.7 to 99.6

17

3.7

0.2 to 22.1

17

1.2

0.1 to 5.2

17

7.0

0.9 to 18.2

17

1.1

0.1 to 6.9

14

0.05

0.01 to 0.2

14

2.7 2.1 to 4.1 17

1.3 0.6 to 2.5 17

0.4 -0.8 to 2.1 17

11.6 -0.4 to 34.3 17

2.8 1.8 to 3.3 17

1.2 0.4 to 1.9 17
-0.1 -1.9 to 1.0 15

1.3 0.6 to 1.9 15

610

Scyphoproctus platyproctus Jones, 1961

One specimen was collected in Boca Ciega Bay, and
another was taken in lower Tampa Bay near Mullet Key
(table 274) .

Sediment at the Boca Ciega Bay station was sand
that contained nearly 20 percent silt and clay. The
shell content was over 19 percent, and organic carbon
was under one percent (table 275).

No vegetation was noted at collection sites.

No observations were made on the worm's reproduc-
tive habits.

This unusual species was originally described from
collections in the northern Gulf of Mexico off Panama
City, Florida. As far as I know, there are no records of
S.. platyproctus outside the Gulf of Mexico.

611

Table 274. — Scyphoproctus platyproctus — Locality records

and number of individuals from survey stations,
Tampa Bay, Florida, 1963-69 (D-dredge, S-
shovel, N-net)

Boca Ciega Bay

Stations Individuals Stations individuals

D S N D S N

BC-A 1

612

Table 2 75. — Scyphoproctus platyproctus — Mean and range of
observed environmental factors from survey
stations, Tampa Bay, Florida, 1963-69

Factor

Mean

Range

Water temperature (*C.) 17.0

Salinity (.%.) 31.4

PH 7.9

Depth (m. ) 0.7

Sediment type sand

Granules (wt. %) 1.8

Sands (wt. %) 78.8

Silts (wt. *) 12.2

Clay (wt. %) 7.2

CaC03 (wt. %) 19.4

Organic carbon (wt. t) 0.5

Organic nitrogen (wt. %) 0.01

Mean grain size,

total sample (0) 3.5

Standard deviation,

total sample (0) 2.1

Skewness, total sample 0.5

Kurtosis, total sample 1.9

Mean grain size,

noncarbonate fraction (0) 3.1

Standard deviation,

noncarbonate fraction (0) 1.5

Mean grain size,

carbonate fraction (0) 0.6

Standard deviation,

carbonate fraction (0) 1.0

Number
observations

613
Family ARENICOLIDAE Johnston, 1835

Commonly known as lugworms, members of this family
are distributed in all seas. Most species live in a u-
shaped burrow and feed on organic matter in the sediment
as well as that which is concentrated from water pumped
through the sand "filter" at the anterior end of the
Burrow.

Only one species, Arenicola cristata, was collected

in Tampa Bay. This species leaves no conical depression

over the anterior end of the burrow, and extrudes no

sand castings at the posterior end. Its only surface

sign is a large, oval, gelatinous egg case.

Arenicola cristata Stimpson, 1856
(Described and illustrated by Hartman, 1969)

Specimens were collected at a total of 22 survey sta-
tions and seven incidental localities in all areas of the
Estuary except Hillsborough Bay and Terra Ceia Bay (table
276).

No worms were found in soft sediments, and average
sediment type at dredge and shovel stations was poorly
sorted, fine sand, it contained only small amounts of
shell, and silt and clay, and less than one percent or-
ganic carbon (table 277).

614

Seventeen of the 22 bottom samples contained algae
and one or more of all sea grasses found in the Estuary
except widgeon grass.

Egg cases of A. cristata were seen in every month
of the year.

This species occurs in the Gulf of Mexico, and on
the eastern coast of the United States from New England
to Florida. On the west coast, it has been reported only
from southern California.

615

Table 276. — Arenicola crlstata — Locality records and number
of individuals from survey stations, Tampa Bay,
Florida, 1963-69 (D-dredge, S-shovel, N-net)

Old Tampa Bay

Stations

Individuals

Stations

Individuals

A-2
A-6
B-l
2-1

3-14
3-15
3-17
6-1-B

Upper Tampa Bay

D-28
10-0

14

1

11-1
13-13

Boca Ciega Bay

D-l

1

D-19-A

1

14-1-A

9

16-4
16-5
16-8

14-1-B

10

Lower Tampa Bay

14-19
15-31

1

7

17-1

1

G16

Table 277. — Arenlcola cristata — Mean and range of observed
environmental factors from survey stations,
Tampa Bay, Florida, 1963-69

Factor

Mean

Range

Number
observations

Water temperature (*C.)

Salinity {%.)

pH

Depth (m. )

Sediment type

Granules ^wt. %)

Sands (wt. %)

Silts (wt. %)

Clay Cwt. %)

CaC03 (wt. %)

Organic carbon (wt. %)

Organic nitrogen (wt. %)

Mean grain size,
total sample (0)

Standard deviation,
total sample (0)

Skewness, total sample

Kurtosis, total sample

Mean grain size,
noncarbonate fraction (0)

Standard deviation,
noncarbonate fraction (0)

Mean grain size,
carbonate fraction (0)

Standard deviation,
carbonate fraction (0)

26.9

12.8

to

32.7

22

27.8

18.3

to

33.4

22

8.0

7.7

to

8.3

16

0.4

Zi

to

1.0

22

sand

—

22

1.5

0.0

to

13.4

22

95.3

80.5

to

99.8

22

2.2

0.2

to

7.2

22

0.9

0.1

to

3.6

22

4.6

0.7

to

20.8

22

0.7

0.2

to

2.6

14

0.04

0.01 to 0.1

14

2.7 1.8 to 3.1 22

1.1 0.5 to 2.3 22

0.8 -0.5 to 2.6 22

14.7 1.5 to 43.8 22

3.1 2.1 to 4.2 22

1.5 0.6 to 3.1 22

-0.3 -2.4 to 1.8 19

1.3 0.9 to 2.4 19

617

Family MALDANIDAE Malmgren, 1867
This is a large family of tube-building species that
are found throughout the world in sand and softer sedi-
ments. The tube is composed of a membranous matrix in
which sediment particles are incorporated. The diet of
maldanids consists of organic material in bottom deposits,
and perhaps particulate, organic material that enters the
dwelling tube in water currents generated by the worm.

Five maldanid species were found in Tampa Bay.
Branchioasychis americana and Maldane sarsi were collected
in all areas of the Estuary. Clymenella mucosa was found
everywhere except Hillsborough Bay. Clymenella torquata
callda was taken at widely separated localities in Old
Tampa Bay and lower Tampa Bay, and Clymenella zonalis was
found only in the comparatively saline waters of Boca Ciega
Bay and lower Tampa Bay.
Key to MALDANIDAE Collected in Tampa Bay

1 Segments 7 to 11 bear numerous gill

filaments Branchioasychis americana

- Gill filaments absent 2

2 Anal plate has a lateral notch on

each side Maldane sarsi

- Anal plate has numerous, marginal filaments 3

618

3 Fourth setiger modified in the form of a
broad, flanged collar; dorsal edge of
cephalic plate has about 10
indentations Clymenella torquata calida

Fourth setiger unmodified; cephalic plate

has 5 indentations Clymenella zonalis

- Fourth setiger unmodified; cephalic plate

has 2 indentations Clymenella mucosa

Branchioasychis americana Hartman, 1945

Although this species was found throughout Tampa Bay,
most of the 47 survey station records came from Boca Ciega
and Terra Ceia Bays, and lower Tampa Bay. At station E-7
in Terra Ceia Bay, 104 specimens were collected in a single
dredge haul (table 278). Five incidental localities for
B. americana were recorded in Boca Ciega Bay and Old Tampa
Bay.

Average sediment type at dredge and shovel stations
was poorly sorted, fine sand that contained less than 10
percent shell, nearly eight percent silt and clay, but
little organic carbon (table 279).

Algae were found in 19 of 43 bottom samples together
with one or more sea grasses that included shoal, manatee,
and turtle grass.

Juvenile worms were collected in September, October,
and November. No gravid specimens were noted.

619
B. amerlcana was originally described from North
Carolina, and has been collected elsewhere on the south
Atlantic coast of the United States and in the Gulf of
Mexico.

620

Table 278. — Branchloasychls americana — Locality records

and number of individuals from survey stations,
Tampa Bay, Florida, 1963-69 (D-dredge, S-
shovel, N-net)

Old Tampa Bay

Stations

Individuals Stations

Individuals

D

S

N

D S N

2-2

2-3
2-4

3

1
1

2-5
4-12

15

1

Hillsborough Bay

10-20

2

Upper Tampa Bay

11-16
11-20
11-21

1 11-22

1 11-26

2 12-14

1
3
1

Boca Ciega Bay

BC-E

1

BC-H

1

BC-I

2

BC-M

19

D-ll

2

D-25

1

PB-l-A

1

14-2

4

14-3

4

14-4

17

15-3

15-6

B

15-11

2

15-14

6

15-15

1

16-1

16-6

1

Terra Ceia Bay

E-l 3

E-2

E-3 30

E-4

2

E-7

104

E-8

1

621

Table 278. — Branchloasychis americana — Locality records

and number of individuals from survey stations,
Tampa Bay, Florida, 1963-69 (D-dredge, S-
shovel, N-net)-(continued)

Lower Tampa Bay

Stations

Individuals Stations

Individuals

D S N

D S N

14-6

2

15-31

1

16-10

8

16-20

3

16-21

6

16-22

18

16-23

10

17-2

17-7

1

17-8

4

17-9

11

17-13

2

622

Table 2 79. — Branchioasychls aroericana — Mean and range of
observed environmental factors from survey
stations, Tampa Bay, Florida, 1963-69

Factor

Mean

Range

Number
observations

Water temperature (•(:.)

Salinity (%.)

PH

Depth (m.)

Sediment type

Granules (wt. %)

Sands (wt. %)

Silts (wt. %)

Clay (wt. %)

CaC03 (wt. %)

Organic carbon (wt. %)

Organic nitrogen (wt. %)

Mean grain size,
total sample (0)

Standard deviation,
total sample (0)

Skewness, total sample

Kurtosis, total sample

Mean grain size,
noncarbonate fraction (0)

Standard deviation,
noncarbonate fraction (0)

Mean grain size,
carbonate fraction (0)

Standard deviation,
carbonate fraction (0)

21.7

14.5

to

31.3

43

30.3

22.9

to

34.6

43

8.0

7.3

to

8.5

43

1.0

D-

to

2.3

43

sand

sand
silt

to

clayey

43

1.6

0.0

to

11.2

43

90.6

11.2

to

99.8

43

5.2

0.1

to

44.4

43

2.5

0.02

: tc

i 43.8

43

9.3

0.6

to

44.4

43

0.4

0.04

, tc

i 2.0

36

0.02

o.oc

i tc

i 0.1

36

2.9 1.7 to 7.1 43

1.4 0.5 to 2.2 43
0.6 -0.6 to 2.0 43

9.05 1.4 to 24.4 43

2.8 1.4 to 4.4 42

1.2 0.4 to 2.4 42

0.3 -2.5 to 2.3 36

1.2 0.4 to 2.9 36

623

Clymenella mucosa (Andrews, 1891)
(Described by Mangum, 1962)

C. mucosa was found to be the most common maldanid
in the Estuary, but even so, no specimens were collected
in Hillsborough Bay. From all other areas of the Estuary,
there were records from a total of 100 survey stations and
11 incidental localities. The worm occurred regularly and
in large numbers along transects in upper Tampa Bay, and
from there to transect-18 (table 280).

This species was collected in bottom types that varied
from shelly sand to clayey silt, but most specimens came
from sand. As an average, the sand was fine and poorly
sorted, and had a considerable amount of shell. The silt
and clay content was less than five percent, and the per-
centage of organic carbon approached one percent (table
281).

Algal vegetation was present in one-half of the bottom
samples, together with sea grasses that included all five
species found in the Estuary.

Gravid or juvenile specimens were collected in every
month but March.

C. mucosa has a geographic range from North Carolina
to the Caribbean, and has been collected in the Gulf of
Mexico.

624

Table 280. — Clymenella mucosa — Locality records and number
of individuals from survey stations, Tampa Bay,
Florida, 1963-69 (D-dredge, S-shovel, N-net)

Old Tampa Bay

Stations

Individuals

Stations

Individuals

A-6
B-l
B-2
2-1

84
13

6-1-A
6-1-C
6-2
6-7-A

2

31

Upper Tampa Bay

D

4

D-28

4

10-0

3

10-1-A

25

10-10

1

10-11

1

11-1

28

11-2

11

11-3

363

11-4

4

11-16

1

11-17

1

11-22

3

11-28-1

20

12-1

33

12-2

1

12-3

6

12-5

11

12-6

21

12-7

4

12-8

30

12-9

46

12-10

51

12-11

145

12-12

110

13-1-A

21

13-1-B

15

13-3

1

13-4

5

13-5

42

13-6

40

13-7

65

13-8

17

13-9

1

13-10

11

13-13

12

625

Table 280. — Clymenella mucosa — Locality records and number
of Individuals from survey stations, Tampa Bay,
Florida, 1963-69 (D-dredge, S-shovel, N-net)-
( continued)

Boca Ciega

Bay

Stations

Individuals

Stations

Indivi

duals

D

S

N

D

S

N

BC-A

13

PB-5

14

3

BC-A-1

1

14-1-A

2

BC-C

4

14-3

3

BC-G

3

15-1

2

BC-I

2

15-2

4

10

BC-M

9

11

15-3

3

10

BC-M-1

1

15-5

2

BC-N

95

1

15-6

17

D-l

1

15-8

3

D-2

181

5

15-11

1

D-3

9

15-12

4

1

D-4

2

15-13

1

D-5

4

15-15

5

D-6

25

15-16

21

D-ll

12

30

15-17

2

D-l 4

10

16-1

4

1

D-15

1

16-2

25

D-l 7

40

8

16-3

80

D-23

25

16-4

124

D-2 4

2

16-5

7

D-2 5

8

16-6

51

1

PB-1

13

100+

16-7

6

PB-4

77

10

15

16-8

32

Terra Ceia

Bay

E-l

3

E-5

16

2

E-2

2

B-6

29

E-3

5

E-8

56

3

E-4

30

1

626

Table 280. — Clymenella mucosa — Locality records and number
of individuals from survey stations, Tampa Bay,
Florida, 1963-69 (D-dredge, S-shovel, N-net)-
( continued)

Lower Tampa Bay

Stations

Individuals Stations

Individuals

D S N

D S N

D-2 7

3

14-5

48

14-6

130

14-7

6

14-8

209

14-10

17

14-12

4

14-13

1

14-14

6

14-15

40

14-16

3

14-17

2

15-18

36

15-19

13

15-20

9

15-21

47

15-22

7

15-23

1

15-26

9

15-27

26

15-28

19

15-29

84

15-30

116

15-31

35

15-32

73

15-33

43

16-9

8

16-9-A

63

16-9-B

58

16-10

2

16-11

26

16-12

10

10

10

16-13

67

16-14

77

1

16-15

60

16-16

20

10

16-17

16

16-19

3

16-20

1

7

16-21

1

1

16-22

3

16-23

2

16-24

44

16-25

22

16-26

7

16-27

2

16-28

1

17-1

2

17-2

58

1

17-3

22

17-4

23

17-5

52

17-6

37

17-7

22

17-8

121

17-9

13

1

17-10

28

17-11

13

17-12

15

17-13

1

17-14

2

18-3

80

18-4

30

627

Table 281. — Clymenella mucosa — Mean and range of observed
environmental factors from survey stations,
Tampa Bay, Florida, 1963-69

Factor

Mean

Range

Number
observations

Water temperature (°C.)

Salinity (%.)

pH

Depth (m.)

Sediment type

Granules (wt. %)

Sands (wt. %)

Silts (wt. %)

Clay (wt. %)

CaC03 (wt. %)

Organic carbon (wt. %)

Organic nitrogen (wt. %)

Mean grain size,
total sample (0)

Standard deviation,
total sample (0)

Skewness, total sample

Kurtosis, total sample

Mean grain size,
noncarbonate fraction (0)

Standard deviation,
noncarbonate fraction (0)

Mean grain size,
carbonate fraction (0)

Standard deviation,
carbonate fraction (0)

22.5

12.8 to 33.2

161

30.2

19.2 to 35.1

161

8.1

7.6 to 8.4

155

1.1

/l to 4.0

161

sand

shelly sand to
clayey silt

155

2.5

0.0 to 28.8

155

92.8

6.9 to 100

155

3.1

0.0 to 75.0

155

1.4

0.0 to 65.9

154

16.6

0.7 to 85.2

154

0.8

0.01 to 8.5

126

0.04

0.00 to 0.3

126

2.4

0.4 to 7.6

154

1.2

0.5 to 3.0

154

0.2

-1.7 to 1.9

154

9.1

-0.9 to 41.2

153

3.1 1.4 to 9.0

1.3 0.4 to 3.2

0.3 -2.4 to 3.0

1.2 0.04 to 2.9

143
143
118
118

628
Clymenella torquata calida Hartman, 1951

The cephalic plate of this worm has been illustrated
(figure 12,B,C) because Hartman (1951) gave only a descrip-
tion.

Specimens were taken at one survey station in Boca
Ciega Bay, and near Oldsmar, Florida, at an incidental
station in Old Tampa Bay (table 282).

Sediment at the station in Boca Ciega Bay was very
poorly sorted, fine sand that contained a moderate amount
of shell and considerable silt. Data for organic carbon
are not available (table 283).

No bottom vegetation was noted at either station.

No observations were made on the worm's reproductive
habits .

C. torquata calida was originally described from
specimens collected in Barataria Bay, Grand Isle, Louisi-
ana. Specimens from Tampa Bay represent the only other
collections, and support Hartman 's contention that the
Louisiana material represents a valid subspecies.

629

Table 282. — Clymenella torquata calida — Locality records

and number of individuals from survey stations,
Tampa Bay, Florida, 1963-69 (D-dredge, S-
shovel, N-net)

Boca Ciega Bay

Stations Individuals Stations Individuals

D-3

6 30

Table 283. — Clymenella torquata calida — Mean and range of
observed environmental factors from survey
stations, Tampa Bay, Florida, 1963-69

Factor

Mean

Range

Number
observations

Water temperature (*C.) 27.0

Salinity (%.) 33.1

pH 8.1

Depth (m.) 0.3

Sediment type sand

Granules (wt. %) 7.4

Sands (wt. %) 81.0

Silts (wt. %) 10.0

Clay (wt. %) 1.6

CaC03 (wt. %) 17.5

Organic carbon (wt. %)

Organic nitrogen (wt. %) —

Mean grain size,

total sample (0) 2.5

Standard deviation,

total sample (0) 2.4

Skewness, total sample -0.2

Kurtosis, total sample 1.7

Mean grain size,

noncarbonate fraction (0) 3.3

Standard deviation,

noncarbonate fraction (0) 1.8

Mean grain size,

carbonate fraction (0) -0.3

Standard deviation,

carbonate fraction (0) 1.8

631

Clymenella zonalis (Verrill, 1874)
(Described and illustrated by Mangum, 1962)

The five survey stations where C. zonalis was collect-
ed were divided between Boca Ciega Bay and lower Tampa Bay
(table 284) .

The bottom type at all localities was sand that, as
an average, was fine and poorly sorted. Mean figures show
that the percentage of shell was high, as was organic
carbon (table 285).

Two bottom samples contained algae and shoal, manatee,
or turtle grass.

Neither juvenile nor gravid specimens were collected.

C. zonalis has been collected on the Atlantic coast
from North Carolina and New England. Tampa Bay records
represent the first collections from the Gulf of Mexico.

632

Table 284. — Clymenella zonalis — Locality records and

number of individuals from survey stations,
Tampa Bay, Florida, 1963-69 (D-dredge, S-
shovel, N-net)

17-4

Boca Ciega Bay

Stations Individuals Stations Individuals

D

s

N

D

S

N

D-19-A
D-22

3

2

D-23
15-4

1

5

Lower Tampa Bay

633

Table 285. — Clymenella zonalls — Mean and range of observed
environmental factors from survey stations,
Tampa Bay, Florida, 1963-69

Number
Factor Mean Range observations

Water temperature (

•c.

)

27.0

24.1

to

30.8

5

Salinity (%.)

32.4

30.8

to

34.0

5

pH

8.2

8.0

to

8.3

5

Depth (m. )

1.1

Zi

to

2.7

5

Sediment type

sand

—

5

Granules (wt. %)

4.0

0.2

to

9.7

S

Sands (wt. %)

90.1

83.7

to

95.6

5

Silts (wt. %)

4.9

1.2

to

8.6

5

Clay (wt. %)

1.0

0.5

to

2.3

5

CaC03 (wt. %)

25.0

13.3

to

65.5

5

Organic carbon (wt.

%)

2.7

0.6

to

6.9

3

Organic nitrogen (w

t.

%)

0.1

0.03 tc

i 0.2

3

Mean grain size,

total sample (0) 2.3 1.3 to 3.0

Standard deviation,
total sample (0)

Skewness, total sample

Kurtosis, total sample

Mean grain size,
noncarbonate fraction (0)

Standard deviation,
noncarbonate fraction (0)

Mean grain size,
carbonate fraction (0)

Standard deviation,
carbonate fraction (0)

1.7

1.3

to

2.5

5

0.3

-0.8

to

1.2

5

4.8

2.4

to

6.3

5

2.9

2.1

to

3.0

5

1.5

1.2

to

1.9

5

0.1

-1.1

to

1.7

5

1.1

0.8

to

1.2

5

634

Maldane sarsi Malmgren, 1866
(Described and illustrated by Day, 1967)

Individuals were collected at 21 survey stations in
all areas of the Estuary. About one-half of the stations
were located in Old Tampa Bay. The largest number of
specimens in a single dredge haul were taken at station
E-3 in Terra Ceia Bay (table 286).

Average bottom type was poorly sorted, very fine sand
that contained less than 10 percent shell. The silt and
clay fraction was nearly 10 percent, but organic carbon
was less than one percent (table 287).

One-third of the bottom samples contained algae, and
shoal grass was found in a few.

Neither gravid nor juvenile specimens were found.

M. sarsi has been collected in the Gulf of Mexico and
is otherwise known from numerous localities in all seas.

635

Table 286. — Maldane sarsl — Locality records and number of
individuals from survey stations, Tampa Bay,
Florida, 1963-69 (D-dredge, S-shovel, N-net)

B-2
1-4
2-4
3-7
3-11

Old Tampa Bay

Stations

Individuals Stations

Individuals

D S N

D S N

4-8

1

4-11

1

4-12

6

4-13

1

4-15

2

Hillsborough Bay

10-22

1

Upper Tampa Bay

11-22

1

Boca Ciega Bay

BC-I
D-22

2

2

15-1
15-12

1
3

Terra Ceia Bay

E-2
E-3

48

1 E-7
1

4

Lower Tampa Bay

16-21

1

17-9

2

636

Table 287. — Maldane sarsl — Mean and range of observed

environmental factors from survey stations,
Tampa Bay, Florida, 1963-69

Number
Factor Mean Range observations

Water temperature (*C.)

Salinity (%.)

PH

Depth (m.)

Sediment type

Granules (wt. %)

Sands (wt. %)

Silts (wt. %)

Clay (wt. %)

CaC03 (wt. %)

Organic carbon (wt. %)

Organic nitrogen (wt. %)

Mean grain size,

total sample (0) 3.1 2.6 to 4.2 21

Standard deviation,
total sample (0)

Skewness, total sample

Kurtosis, total sample

Mean grain size,
noncarbonate fraction (0)

Standard deviation,
noncarbonate fraction (0)

Mean grain size,

carbonate fraction (0) -0.4 -2.5 to 1.7 20

Standard deviation,

carbonate fraction (0) 1.2 0.6 to 1.9 20

26.1

14.5

to

32.0

22

27.0

22.4

to

34.0

22

8.0

7.1

to

8.5

20

1.3

D-

to

2.3

22

sand

sand
sand

to

silty

21

0.6

0.0

to

4.7

21

89.8

72.5

to

97.2

21

6.0

1.3

to

22.1

21

3.6

0.5

to

11.2

21

6.8

0.8

to

54.7

21

0.4

0.04 to 1.0

12

0.03

0.01 to 0.1

12

1.5

1.0 to

2.6

21

1.0

-0.6 to

1.7

21

8.0

-0.04 to

17.5

21

3.0

1.4 to

3.8

21

1.4

0.4 to

2.2

21

637

Family OWENIIDAE Rloia, 1917

This is a small family that contains about six genera.
The various species are known from localities in most seas
where they usually construct membranous tubes studded with
particles of sand and shell. Although the diet of some
species has not been determined, members of the genus Owenla,
and others with a frilly, prostomial membrane, feed on par-
ticulate organic material suspended in the water column.

Three owenlids were collected in Tampa Bay. None were

collected in either Old Tampa or Hillsborough Bays. Owenia

fusiformis. the most commonly found species, was collected

in all areas of the Estuary. Boguea enigmatica was taken

in Boca Ciega and Terra Ceia Bays, and Myriochele sp., was

collected only in lower Tampa Bay.

Key to OWENIIDAE Collected in Tampa Bay

1 Prostomium divided and modified as a

frilly membrane Owenia fusiformis

Prostomium modified as a smooth

collar Myriochele sp.

Prostomium unmodified; minute;

not tubicolous Boguea enigmatica

Boguea enigmatica Hartman, 1945

Specimens were collected at a total of seven survey

stations in Boca Ciega and Terra Ceia Bays (table 288).

638

Average sediment at dredge stations was poorly sorted,
fine sand. It contained only nine percent shell, and very
little silt, clay, or organic carbon (table 289) .

All of the bottom samples contained algae, and two
had turtle grass as well.

Neither gravid nor juvenile specimens were collected.

Aside from the collections reported here, Boguea
enigmatica is known only from the type locality in Bogue
Sound near Beaufort, North Carolina.

639

Table 288. — Boquea eniqmatlca — Locality records and number
of individuals from survey stations, Tampa Bay,
Florida, 1963-69 (D-dredge, S-shovel, N-net)

Boca Ciega Bay

Stations Individuals Stations Individuals

D-2 1 PB-l XO

D-17 6 PB-4 1 1

D-2 4 6

Terra Ceia Bay
E-4 1 E-5

640

Table 289. — Boquea eniqmatica — Mean and range of observed
environmental factors from survey stations,
Tampa Bay, Florida, 1963-69

Factor

Mean

Range

Number
observations

Water temperature (*C.)

Salinity (*.)

PH

Depth (m. )

Sediment type

Granules (wt. %)

Sands (wt. %)

Silts (wt. %)

Clay (wt. %)

CaC03 (wt. %)

Organic carbon (wt. %)

Organic nitrogen (wt. %)

Mean grain size,
total sample (0)

Standard deviation,
total sample (0)

Skewness, total sample

Kurtosis, total sample

Mean grain size,
noncarbonate fraction (0)

Standard deviation,
noncarbonate fraction (0)

Mean grain size,
carbonate fraction (0)

Standard deviation,
carbonate fraction (0)

20.5

14.5

to 27.0

3

31.8

30.5

to 33.2

3

8.2

—

3

1.3

&

to 2.0

3

sand

—

3

3.9

0.8

to 7.1

3

94.7

91.2

to 98.8

3

0.8

0.3

to 1.8

3

0.6

0.1

to 1.4

3

9.0

6.1

to 13.6

3

0.1

0.0]

. to 0.3

2

0.1

0.04 to 0.1

2

2.2

1.9 to 2.5

1.4

0.9

to

1.8

3

0.4

-0.6

to

-0.1

3

6.0

4.6

to

8.7

3

2.9

2.6

to

3.1

3

1.0

0.6

to

1.4

3

0.2

-1.7

to

0.9

3

1.1

0.8

to

1.4

3

641

Owenia fusiformis delle Chiaje, 1844
(Described and illustrated by Day, 1967)

In upper Tampa Bay, Boca Ciega Bay, Terra Ceia Bay,
and lower Tampa Bay, O. fusiformis was found at a total of
73 survey stations, incidental collections were recorded
in Boca Ciega Bay and lower Tampa Bay. As many as 24
specimens were taken in a single dredge haul at station
11-4 in upper Tampa Bay (table 290).

Silty sand was recorded at one station, but sand was
the sediment type at all others. As an average, the sand
was fine and poorly sorted. It had a moderate amount of
shell, less than five percent silt and clay, and nearly
one percent organic carbon (table 291).

Thirty-four of 74 bottom samples contained algae and
one or more sea grasses that included shoal, manatee, and
turtle grass.

No gravid specimens were noted, however, a juvenile
worm was collected in November.

This species has been collected in the Gulf of Mexico
and at many other localities around the world.

642

Table 290. — Owenla fusiformis — Locality records and number
of individuals from survey stations, Tampa Bay,
Florida, 1963-69 (D-dredge, S-shovel, N-net)

Upper Tampa Bay

Stations

Individuals Stations

Individuals

D S N

D S N

10-4

3

10-7

2

10-8

3

10-14-A

11-4

24

11-5

10

11-16

1

12-2

12-3

5

12-6

1

12-7

1

12-12

2

10

12-14

8

12-15

4

12-16

2

13-1-B

13-4

4

13-5

9

13-6

4

13-7

1

13-8

3

13-9

3

13-10

1

Boca Ciega Bay

BC-A

4

BC-A-1

1

BC-E

6

BC-N

3

D-2

1

D-19-B
D-23

D-2 5

PB-4

1

PB-5

1

15-4

1

15-16

3

16-6

15

10

Terra Ceia Bay

E-4
E-5

E-8

643

Table 290. — Owenia fusiformis — Locality records and number
of individuals from survey stations, Tampa Bay,
Florida, 1963-69 (D-dredge, S-shovel, N-net)--
( continued)

Lower Tampa Bay

Stations

Individuals Stations

Individuals

D S N

D S N

14-7

2

14-8

2

14-15

5

14-16

10

14-17

5

15-20

2

15-21

5

15-22

4

15-23

1

15-26

1

15-27

2

15-29

2

15-30

3

15-31

18

15-32

5

16-9-B

16-10

1

16-13

6

16-14

1

16-17

16-22

3

16-23

14

16-24

4

16-25

16-27

10

17-2

4

17-5

1

17-6

7

17-7

1

17-8

2

17-9

10

17-10

1

17-13

1

18-3

1

644

Table 291. — Owenia f uslf ormis — Mean and range of observed
environmental factors from survey stations,
Tampa Bay, Florida, 1963-69

Factor

Mean

Number
Range observations

Water temperature (*C.)
Salinity (%. )

PH

Depth (m. )

Sediment type

Granules (wt. %)

Sands (wt. %)

Silts (wt. %)

Clay (wt. %)

CaC03 (wt. %)

Organic carbon (wt. %)

Organic nitrogen (wt. %)

Mean grain size,
total sample (0)

Standard deviation,
total sample (0)

Skewness, total sample

Kurtosis, total sample

Mean grain size,
noncarbonate fraction (0)

Standard deviation,
noncarbonate fraction (0)

Mean grain size,
carbonate fraction (0)

Standard deviation,
carbonate fraction (0)

21.9

13.0

to

31.3

7 A

30.2

21.2

to

35.1

73

8.1

7.7

to

8.4

73

1.4

D-

to

4.0

74

sand

sand
sand

to

silty

71

2.7

0.0

to

14.7

71

95.0

72.8

to

99.5

71

1.6

0.0

to

12.2

71

0.6

0.0

tc

7.2

71

18.5

1.5

to

68.0

71

0.8

0.1

to

8.5

60

0.04

0.00 to 0.2

60

2.3 0.6 to 7.6 71

1.2 0.5 to 2.7 71
0.1 -1.7 to 1.9 71

9.1 0.3 to 31.9 70

2.9 1.4 to 9.0 66

1.3 0.5 to 3.2 66
0.2 -1.8 to 2.2 50

1.2 0.2 to 2.0 50

645
Myriochele sp.

This undetermined species resembles Myriochele
pygidialls in general form, shape of prostomial collar,
and shape of uncini (figure 12,D,E,F). It is much smaller,
however (0.5 mm. wide by 20 mm. long) and the pygidium is
forked rather than divided into numerous processes (figure
12, G).

Collections were limited to comparatively saline waters
of lower Tampa Bay where the worm was taken at 21 survey
stations (table 292).

Sand was the only bottom type where the worm was found.
Mean grain size was in the medium sand category, and parti-
cles were poorly sorted. The average shell content was
high, the percentage of silt and clay was below five, and
organic carbon was under one percent (table 293) .

Algae were recorded from three bottom samples, but
no sea grasses were noted.

Neither gravid nor juvenile specimens were seen.

646

Table 292. — Myriochele sp. — Locality records and number
of individuals from survey stations, Tampa
Bay, Florida, 1963-69 (D-dredge, S-shovel,
N-net)

Lower Tampa Bay

Stations

Individuals Stations

Individuals

D S N

D S N

15-24

2

15-26

1

16-10

3

16-11

1

16-13

42

16-14

4

16-15

17

16-17

4

16-20

2

16-21

1

17-2

16

17-3

1

17-4

4

17-5

6

17-6

16

17-7

6

17-8

9

17-9

16

17-10

1

17-12

3

17-13

2

647

Table 293. — Myriochele sp. — Mean and range of observed
environmental factors from survey stations,
Tampa Bay, Florida, 1963-69

Factor Mean

Water temperature i'C.) 22.5

Salinity (%.) 32.7

pH 8.0

Depth (m. ) 2.1

Sediment type sand

Granules (wt. %) 3.6

Sands (wt. %) 94.0

Silts (wt. %) 1.8

Clay (wt. %) 0.5

CaC03 (wt. %) 32.0

Organic carbon (wt. %) 0.7

Organic nitrogen (wt. %) 0.04

Mean grain size,

total sample (0) 2.0 0.5 to 3.1 20

Standard deviation,
total sample (0)

Skewness, total sample

Kurtosis, total sample

Mean grain size,
noncarbonate fraction (0)

Standard deviation,
noncarbonate fraction (0)

Mean grain size,
carbonate fraction (0)

Standard deviation,
carbonate fraction (0)

Number

Ranq

e

observations

18.0

to

25.0

21

29.9

to

34.5

21

7.8

to

8.3

21

1.0

to

4.0

21

—

20

0.2

to

8.9

20

87.8

to

98.9

20

0.4

to

4.7

20

0.1

to

1.3

20

2.4

to

85.2

20

0.1

to

3.3

20

0.00 tc

i 0.2

20

1.3

0.7

to

2.0

20

0.2

-1.3

to

1.0

20

7.6

2.0

to

16.1

20

3.2

1.4

zo

6.1

20

1.3

0.5

to

3.2

20

0.7

-0.1

to

3.0

12

1.0

0.8

to

1.3

12

Figure 12. — Diagnostic features of Travisia sp., Clymenella

torguata calida, and Myriochele sp.

Travisia sp. :

(A) Entire worm showing

ventral surface and mouth
Clymenella torguata calida: (B) Anterior end in dorsal

view (C) Anterior end in
lateral view

Myriochele sp. :

(D) Anterior end in lateral

view (E) Anterior end showing
prostomial groove (F) Series
of uncini from setiger four
(G) Terminal segments and

pygidium.

649

FIGURE 12

Vfal* F

0.01 MM

650

Family SABELLARIIDAE Johnston, 1865
These worms are generally found in temperate and
tropical seas throughout the world. They construct hard,
sandy tubes on solid objects. Sabellariids may occur in-
dividually and in small groups, or they may proliferate as
vast colonies that form reefs. Their diet consists of or-
ganic material suspended in the water column.

Two species were found in Tampa Bay. Sabellaria
florldensis was collected as far into the Estuary as upper
Tampa Bay, but Sabellaria gracilis was not found outside
Boca Ciega Bay and lower Tampa Bay.
Key to SABELLARIIDAE Collected in Tampa Bay

1 Outer opercular paleae have a central, spinous
spike, and 2 smooth teeth on each
side Sabellaria florldensis

- Lateral teeth more numerous and arranged

asymmetrically Sabellaria gracilis

Sabellaria florldensis Hartman, 1944b
Only one specimen was taken in upper Tampa Eay, and
collections from the other 17 survey stations were limited
to Boca Ciega and lower Tampa Bays. One incidental col-
lection was made near Mullet Key in lower Tampa Bay (table
294).

Sand was the only bottom type recorded for collections

651

of S. floridensis. As an average, it was poorly sorted
and fine, and contained about 17 percent shell, over seven
percent silt and clay, but very little organic carbon
(table 295).

One of seven bottom samples contained algae together
with shoal and turtle grass.

No juvenile specimens were collected, and dwelling
tubes were not opened in order to examine worms for de-
velopment.

S.. floridensis has been collected only in the Gulf
of Mexico, where it is apparently indigenous.

652

Table 294. — Sabellarla f loridensls — Locality records and
number of individuals from survey stations,
Tampa Bay, Florida, 1963-69 (D-dredge, S-
shovel, N-net)

Upper Tampa Bay

Stations

Individuals Stations

Individuals

D S N

D S N

12-13

1

Boca Ciega Bay

BC-A 5 PB-1 4

BC-A-1 3 14-2 25

BC-I 1 14-3 25

BC-M 1 14-4 40

BC-N 12 7 15-5 6

D-22 10 15-6 3

D-25

1

15-11

1

Lower Tampa Bay

16-10
17-2

2

17-5
15

1

653

Table 295. — Sabellaria f loridensls — Mean and range of
observed environmental factors from survey
stations, Tampa Bay, Florida, 1963-69

Factor

Mean

Number
Range observations

Water temperature (*C.)

Salinity (%. )

pH

Depth (m. )

Sediment type

Granules iut. %)

Sands (wt. %)

Silts (wt. %)

Clay (wt. %)

CaC03 (wt. %)

Organic carbon (wt. %)

Organic nitrogen (wt. %)

Mean grain size,
total sample (0)

Standard deviation,
total sample (0)

Skewness, total sample

Kurtosis, total sample

Mean grain size,
noncarbonate fraction (0)

Standard deviation,
noncarbonate fraction (0)

Mean grain size,
carbonate fraction (0)

Standard deviation,
carbonate fraction (0)

20.6

32.3
8.1
1.3

sand
4.5

91.2
4.8
2.4

17.1
0.2
0.01

17.0 to 26.0

29.8 to 35.1

7.8 to 8.5

£1 to 2.3

0.6 to 14.7

83.5 to 98.8

1.0 to 12.2

0.0 to 7.2

3.5 to 38.2

0.1 to 0.5
0.00 to 0.05

2.7 1.4 to 3.5

1.5 1.0 to 2.1

0.2 -1.1 to 0.9

5.9 0.9 to 11.6

3.0 2.5 to 4.4

1.1 0.7 to 1.9
0.8 0.5 to 1.5
0.8 0.2 to 1.3

7
7
6

6

6

654

Sabellaria gracilis Hartman, 1944
(Described and illustrated by Hartman, 1969)

Specimens were collected at a total of 31 survey
stations in Boca Ciega Bay and lower Tampa Bay (table
296).

Silty sand was recorded at one station, but all other
collections came from sand or shelly sand. The sand was
mostly fine and poorly sorted, and average shell content
was over 27 percent. The mean percentage of silt and clay
fractions was less than four, and organic carbon was less
than one percent (table 297).

One-third of the bottom samples contained algae and
either shoal or turtle grass.

Juvenile specimens were collected in October and
November, but no gravid individuals were seen.

Aside from records for Tampa Bay, S. gracilis has
been collected only in southern California.

655

Table 296. — Sabellaria gracilis — Locality records and

number of individuals from survey stations,
Tampa Bay, Florida, 1963-69 (D-dredge, S-
shovel, N-net)

Boca Ciega Bay

Stations

Individuals Stations

Individuals

Q S N

D S N

BC-A

BC-A-1

BC-M

BC-N

D-13

D-23

D-25

PB-1

2

PB-4

1

PB-5

15-6

1

15-11

2

16-2

1

16-6

10

1
11

10

1

Lower Tampa Bay

14-5

14-6

1

14-9

1

15-22

1

15-26

1

15-31

5

16-10

63

16-11

15

16-14

34

16-15

3

16-19

3

16-25

2

17-2

1

4

17-4

1

17-5

1

17-6

2

2

17-7

1

656

Table 297. — Sabellaria gracilis — Mean and range of observed
environmental factors from survey stations,
Tampa Bay, Florida, 1963-69

Number
Factor Mean Range observations

Water temperature (*C.)

Salinity (%. )

pH

Depth (m. )

Sediment type

Granules (wt. %)

Sands (wt. %)

Silts (wt. %)

Clay (wt. %)

CaCCu (wt. %)

Organic carbon (wt. %)

Organic nitrogen (wt. %)

Mean grain size,

total sample (0) 2.1 1.1 to 3.5 21

Standard deviation,
total sample (0)

Skewness, total sample

Kurtosis, total sample

Mean grain size,
noncarbonate fraction (0)

Standard deviation,
noncarbonate fraction (0)

Mean grain size,
carbonate fraction (0)

Standard deviation,
carbonate fraction (0)

22.2

15.0 to 26.0

21

32.5

29.9 to 35.1

21

8.0

7.8 to 8.2

21

1.6

/I to 4 .0

21

sand

shelly sand to
silty sand

21

5.4

0.0 to 28.8

21

91.2

78.8 to 98.3

21

2.6

0.6 to 12.2

21

0.9

0.0 to 7.2

21

27.7

5.1 to 65.5

21

0.7

0.1 to 4.8

19

0.03

0.01 to 0.2

19

1.5

0.8

to

3.0

21

0.01

-1.7

to

1.3

21

4.9

-0.8

to

15.8

20

3.3

2.2

to

8.7

19

1.3

0.6

to

3.2

19

0.5

-1.7

to

3.0

17

1.1

0.8

to

1.9

17

657

Family PECTINARIIDAE Quatrefaqes, 1865

Members of this family build conical tubes in which

sand and other foreign materials are incorporated. They

feed on bottom deposits and are found in seas throughout

the world.

A single species, Cistenides gouldii. was found in

Tampa Bay.

Cistenides gouldii Verrill, 1873
(Described and illustrated by Hartman, 1942a)

Collections of this polychaete came from all areas of
the Estuary at a total of 116 survey stations and five inci-
dental localities. One-third of these records were from
Old Tampa Bay alone (table 298).

The worm was collected in a range of sediments that
varied from shelly sand to clayey silt. Average sediment
type, however, was poorly sorted, fine sand. It had less
than 10 percent shell, more than eight percent silt and
clay, and nearly one percent organic carbon (table 299).

Bottom vegetation was noted at 40 of 99 dredge and
shovel stations. The plants included algae and one or
more species of all sea grasses found in the Estuary ex-
cept Halophila.

Juvenile specimens were collected from June through

658

December, but no gravid individuals were seen.

C. gouldii has a geographic range that extends from
New England south to the Caribbean and into the Gulf of
Mexico.

659

Table 298. — Cistenides qouldil — Locality records and

number of individuals from survey stations,
Tampa Bay, Florida, 1963-69 (D-dredge, S-
shovel, N-net)

Old

Tampa

Bay

Stations

Individuals

Stations

Individuals

D

S

N

D

S

N

A-l

1

3-12

6

B

9

10

3-13

1

B-l

1

10

3-14

1

B-2

2

3-15

5

2

1-1

4

4-2

1

1-2

3

4-3

1

1-3

3

40

4-5

1

1-4

7

62

4-6

3

1-5

8

26

4-7

2

2-1

1

4-13

2

2-4

2

4-14

1

2-5

1

4-16

2

3-1-A

1

4-1 7-A

1

3-3

13

4-19

1

3-4

1

2

5-3

2

3-5

1

5

5-4

1

3-6

4

6-1-A

6

3-7

4

6-1-C

1

3-8

11

6 -7-A

2

3-11

4

Hillsborough

Bay

C-2

1

C-8-2

1

C-3

3

1

9-3

27

2

C-5

1

9-4

1

C-6

10

10-15

5

10

C-8

1

10-16

2

C-8-1

1

10-22

9

10

660

Table 298. — Cistenldes gouldii — Locality records and

number of individuals from survey stations,
Tampa Bay, Florida, 1963-69 (D-dredge, S-
shovel, N-net J-(continued)

Upper Tampa Bay

Stations

Individuals Stations

Individuals

D S N

D S N

10-4

3

10-9

1

10-12

3

10-13

2

10-14-B

5

11-1

10

11-3

1

11-4

34

10

11-6

2

11-8

5

10

11-11

2

11-13

5

11-14

4

11-15

2

11-17

1

11-18

4

11-19

4

11-20

9

11-21

4

11-22

3

11-26

1

2

11-27

8

12

11-28

3

12-2

1

Boca Ciega Bay

BC-A

3

10

BC-A-1

1

2

BC-H

1

1

BC-I

1

BC-M

2

BC-N

1

D-2

1

D-5

10

D-9

1

D-ll

1

3

D-17

2

1

D-20

10

D-21

10

D-2 3

1

D-2 5

3

PB-1

8

PB-4

1

14-2

1

15-1

2

15-4

1

15-6

3

15-8

3

15-12

2

15-14

2

15-16

1

16-6

2

Terra Ceia Bay

E-l
E-3

E-6
E-7

661

Table 298. — Cistenides gouldii — Locality records and

number of individuals from survey stations,
Tampa Bay, Florida, 1963-69 (D-dredge, S-
shovel, N-net)-(continued)

Lower Tampa Bay

Stations

Individuals Stations

Individuals

D S N

D S N

14-5

1

15-19

1

15-31

3

16-23

1

16-25

2

16-26

1

17-1

17-6 1

17-8 1

17-9 1

17-13 1

662

Table 299. — Cistenides qouldli — Mean and range of observed
environmental factors from survey stations,
Tampa Bay, Florida, 1963-69

Factor

Mean

Ranc

e

Number
observations

Water temperature (*C.

)

26.0

13.0

to

33.8

99

Salinity (%, )

26.5

0.7

to

35.1

99

PH

7.9

7.0

to

8.5

84

Depth (m. )

0.9

D-

to

2.7

99

Sediment type

sand

shelly sand t
clayey silt

o 98

Granules (wt. %)

1.5

o.'o

to

34.5

98

Sands (wt. %)

89.6

11.2

to

99.8

98

Silts (wt. %)

5.0

0.0

to

50.2

98

Clay (wt. %)

3.5

0.0

to

65.9

98

CaCO, (wt. %)

7.9

0.7

to

66.0

97

Organic carbon (wt. %)

0.8

0.04 tc

8.5

55

Organic nitrogen (wt.

%)

0.1

0.01 tc

0.2

55

Mean grain size,
total sample (0)

2.8

0.6

to

7.1

98

Standard deviation,
total sample (0)

1.4

0.5

to

3.8

98

Skewness, total sample

0.7

-1.3

to

2.1

98

Kurtosis, total sample

10.5

-1.1

to

41.2

97

Mean grain size,
noncarbonate fraction

(0)

3.1

1.4

to

9.0

91

Standard deviation,
noncarbonate fraction

(0)

1.5

0.4

to

2.5

91

Mean grain size,
carbonate fraction (0)

-0.3

-2.6

to

2.3

84

Standard deviation,
carbonate fraction (0)

1.3

0.6

to

3.1

84

663

Family AMPHARETIDAE Malmqren, 1867

Ampharetids are found in all seas where they construct
membranous tubes that contain particles of sand and shell,
or silt. They feed on bottom deposits.

Three species were collected in Tampa Bay. The only

one found in all areas of the Estuary was Melinna maculata.

The next most widely distributed was Isolda pulchella,

which occurred in all areas except Boca Ciega Bay.

Sabellides oculata was found at widely separated localities

in Old Tampa Bay, Hillsborough Bay, and Boca Ciega Bay.

Key to AMPHARETIDAE Collected in Tampa Bay

1 Both smooth and pinnate branchial

filaments present Isolda pulchella

- All branchiae smooth; transverse membrane

on the dorsum of setiger 2 Melinna maculata

- All branchiae smooth; dorsal membrane

absent Sabellides oculata

Isolda pulchella Muller, 1858
(Described and illustrated by Day, 1967)

This worm was collected at a total of 63 survey sta-
tions in all areas of the Estuary except Old Tampa Bay.
More than one-half of these collections were recorded in
lower Tampa Bay, and it was in that area that the greatest
number per dredge haul were taken (table 300).

664

Aside from one collection in silty sand, all specimens
came from either shelly sand or sand. Average bottom type
was poorly sorted, fine sand that contained about 20 per-
cent shell, less than three percent silt and clay, and
less than one percent organic carbon (table 301).

Vegetation at 27 of the stations consisted of algae,
together with shoal grass, turtle grass, or manatee grass.

Juvenile specimens were collected in September and
October. No gravid worms were seen.

This species has never before been recorded from the
Gulf of Mexico, although specimens have been found in
Biscayne Bay, Florida, and other localities in temperate
and tropical waters of both the Atlantic and Pacific.

665

Table 300. — Isolda pulchella — Locality records and number

of individuals from survey stations, Tampa Bay,
Florida, 1963-69 (D-dredge, S-shovel , N-net)

Hillsborough Bay

Stations

Individuals Stations

Individuals

D S N

D S N

10-16

1

Upper Tampa Bay

10-4

3

10-7

1

11-4

7

11-15

12-2

1

12-3

4

12-14

10

12-15

1

13-3

7

13-4

2

13-5

6

13-6

2

13-10

2

Boca Ci.ega Bay

BC-A

1

BC-E

1

BC-N

14

D-25

14-3

1

14-4

1

15-9

15-14

4

15-16

1

16-6

16

Terra Ceia Bay

E-5
E-6

2

1

1 E-8

2

666

Table 300. — Isolda pulchella — Locality records and number

of individuals from survey stations, Tampa Bay,
Florida, 1963-69 (D-dredge, S-shovel, N-net)-
( continued)

Lower Tampa Bay

Stations

Individuals Stations

Individuals

D S N

D S N

14-5

1

14-6

8

14-9

4

14-10

4

14-11

1

14-13

6

14-14

2

14-15

9

14-16

5

15-18

1

15-22

1

15-26

1

15-29

4

15-30

12

15-31

122

15-32

5

16-10

6

16-11

2

16-13

2

16-15

1

16-20

5

16-21

16

16-22

6

16-23

17

16-26

1

16-27

20

17-2

14

5

17-5

30

1

17-6

121

2

17-7

82

17-8

83

17-9

47

2

17-10

11

17-12

10

17-13

1

18-3

1

667

Table 301. — Isolda pulchella — Mean and range of observed
environmental factors from survey stations,
Tampa Bay, Florida, 1963-69

Factor

Mean

Range

Number
observations

Water temperature (*C.)
Salinity (%„)

PH

Depth (m.)
Sediment type

Granules (wt. %)

Sands (wt. %)

Silts (wt. %)

Clay (wt. %)

CaC03 (wt. %)

Organic carbon (wt. %)

Organic nitrogen (wt. %)

Mean grain size,
total sample (0)

Standard deviation,
total sample (0)

Skewness, total sample

Kurtosis, total sample

Mean grain size,
noncarbonate fraction (0)

Standard deviation,
noncarbonate fraction (0)

Mean grain size,
carbonate fraction (0)

Standard deviation,
carbonate fraction (0)

21.1

13.0 to 31.3

63

30.7

21.8 to 35.1

62

8.0

7.8 to 8.4

62

1.6

£1 to 4.0

63

sand

shelly sand to
silty sand

61

3.2

0.02 to 21.4

61

94.3

77.8 to 99.8

61

1.8

0.1 to 12.2

61

0.6

0.0 to 7.2

61

20.1

1.4 to 75.1

61

0.7

0.1 to 8.4

58

0.03

0.00 to 0.2

58

2.2 0.4 to 3.5 61

1.3 0.5 to 2.1 61
0.2 -1.7 to 1.9 61
8.2 0.3 to 29.4 60

2.8 1.4 to 9.0 59

1.2 0.5 to 3.2 59

0.3 -2.5 to 3.0 42

1.1 0.2 to 1.9 42

608
Plsta palmata (Verrill, 1873)
Specimens were collected at a total of 20 survey sta-
tions in all areas of the Estuary except Old Tampa Bay and
Hillsborough Bay. in addition, p. palmata was recorded at
four incidental localities in Boca Ciega and lower Tampa
Bays. More than one-half of all collections were made in
Boca Ciega Bay (table 314).

One collection came from silty sand, but the rest
were all taken in shelly sand or sand. Average sediment
type was poorly sorted, fine sand. It had 15 percent shell,
somewhat more than five percent silt and clay, and under
one percent organic carbon (table 315).

Algae were present in six of 15 bottom samples along
with either shoal or turtle grass.

A gravid specimen was found in August and juvenile
worms were collected in February, May, and September.

This polychaete has been collected in the Gulf of
Mexico and is known along the Atlantic coast from Virginia
to New England.

669

Table 302. — Melinna maculata — Locality records and number

of individuals from survey stations, Tampa Bay,
Florida, 1963-69 (D-dredge, S-shovel, N-net)

Old Tampa Bay

Stations Individuals Stations Individuals

A-l

2

A-2

18

A-3

1

B

2

B-l

5

2-1

4

2-2

8

2-3

40

2-4

15

2-5

7

3-5

3-12

1

3-14

8

3-15

8

3-16

12

3-17

11

4-1

4

4-2

3

Hillsborough Bay

C-l
C-2

3

6 10-20

1

Upper Tampa Bay

10-12
11-25

1

1

11-26
13-2

1

10

Boca Ciega Bay

BC-G 5 D-23 1

BC-M 10 D-2 5 1

BC-N 1 PB-4 1

D-6 2 15-3 5

D-ll 1 16-6 1

Terra Ceia Bay

E-2

3

E-6

1

Lower Tampa Bay

16-11
16-26

1

4

16-27
17-15

1

2

670

Table 303. — Kelinna maculata — Mean and range of observed
environmental factors from survey stations,
Tampa Bay, Florida, 1963-69

Number
Factor Mean Range observations

Water temperature (*C.) 26.6 13.0 to 32.0 38

Salinity (.%.) 26.8 18.3 to 34.3 38

PH 7.9 6.7 to 8.4 31

Depth (m.) 0.7 [X to 2.3 38

Sediment type sand shelly sand to 37

clayey sand

Granules (wt. %) 2.3 0.0 to 34.5 37

Sands (wt. %) 90.2 18.2 to 98.7 37

Silts (wt. %) 3.4 0.4 to 11.9 37

Clay (wt. %) 1.9 0.3 to 9.1 37

CaC03 (wt. %) 5.4 0.6 to 21.8 37

Organic carbon (wt. %) 1.1 0.2 to 6.9 19

Organic nitrogen (wt. %) 0.1 0.01 to 1.2 19

Mean grain size,

total sample (0) 2.7 0.6 to 3.3 37

Standard deviation,

total sample (0) 1.4 0.6 to 3.8 37

Skewness, total sample 0.9 -0.8 to 2.0 37

Kurtosis, total sample 10.6 -0.7 to 28.9 37

Mean grain size,

noncarbonate fraction (0) 3.3 1.9 to 6.1 36

Standard deviation,

noncarbonate fraction (0) 1.6 0.4 to 2.4 36

Mean grain size,

carbonate fraction (0) -0.2 -2.4 to 3.0 36

Standard deviation,

carbonate fraction (0) 1.4 0.6 to 2.8 36

671

Sabellides oculata Webster, 1879a

Specimens were found at only eight survey stations
in Old Tampa Bay and Boca Ciega Bay, and at one incidental
locality in Hillsborough Bay (McKay Bay) . As many as 15
individuals were collected in the shovel sample at station
A-2 in the upper reaches of Old Tampa Bay (table 304).

Silty mud was recorded at one station, but the other
six dredge and shovel samples came from bottom that was
mostly medium or fine sand. The average shell content of
sediments was under 10 percent, and the percentage of silt
and clay was over 12. The percentage of organic carbon
was nearly one (table 305).

Vegetation was recorded at four stations, and consisted
of algae in addition to either shoal or turtle grass.

A juvenile specimen was found in November, but no
gravid worms were noted.

This worm has been collected in the Gulf of Mexico
at Seahorse Key, Florida, and is otherwise known only
along the Atlantic coast from Virginia to New England.

672

Table 304. — Sabellides oculata — Locality records and

number of individuals from survey stations,
Tampa Bay, Florida, 1963-69 (D-dredge, S-
shovel, N-net)

Old Tampa Bay

Stati

ons

Individuals Stations

Ind

ividuals

D

S

N

D

S N

A-2
A-5

15
2

2-4
3-15

1

1

Boca Ciega Bay

BC-N
PB-1

1

PB-l-A
1 PB-4

1

2

1

673

Table 305. — Sabellides oculata — Mean and range of observed
environmental factors from survey stations,
Tampa Bay, Florida, 1963-69

Factor

Mean

Range

Number
observations

Water temperature (*C.)

Salinity (i„)

PH

Depth (m.)

Sediment type

Granules (wt. %)

Sands (wt. %)

Silts (wt. %)

Clay (wt. %)

CaC03 (wt. %)

Organic carbon (wt. %)

Organic nitrogen (wt. %)

Mean grain size,
total sample (0)

Standard deviation,
total sample (0)

Skewness, total sample

Kurtosis, total sample

Mean grain size,
noncarbonate fraction (0)

Standard deviation,
noncarbonate fraction (0)

Mean grain size,
carbonate fraction (0)

Standard deviation,
carbonate fraction (0)

24.4

15.5

to

30.5

7

25.1

18.5

to

32.2

7

7.7

7.1

to

8.3

6

0.6

a

to

2.3

7

sand

sand
mud

to

silty

7

2.3

0.0

to

14.7

7

85.4

31.4

to

99.0

7

7.7

0.5

to

44.6

7

4.6

0.2

to

24.0

7

8.1

0.7

to

38.2

7

0.9

0.2

to

1.6

2

0.02

0.01 to 0.03

2

3.1

1.4 to 6.4

1.4 0.7 to 2.6

0.7 -0.3 to 1.6

13.9 0.7 to 28.9

3.2 2.7 to 3.9

1.6 0.7 to 2.4

0.6 -1.2 to 1.5

1.1 0.2 to 2.1

674

Family TEREBELLIDAE Grube, 1851
The family is a large one, and terebellids are found
in seas throughout the world. As a rule, these worms con-
struct a dwelling tube and feed on organic, bottom deposits.
Their feeding process has been described by Dales (1963) .
Nine species were found in Tampa Bay. Hillsborough
Bay was the only area of the Estuary where no terebellids
were collected. Species that were found as far into the
Estuary as Old Tampa Bay included Liomia medusa, Loimia
viridis, Polycirrus eximius, and Thelepus setosus.
Enoplobranchus sanguineus, Pista cristata, Pista palmata,
and Terebella rubra were found only between upper and
lower Tampa Bay. Trichobranchus glacialis is apparently
limited to the comparatively saline waters of lower Tampa
Bay.
Key to TEREBELLIDAE Collected in Tampa Bay

1 Branchiae absent, or confined to the

mid-region of the body 2

- Branchiae present on the dorsum of some

anterior segments 3

2 Branchiae absent Polycirrus eximius

Branchiae on the mid-region bear tufts

of fine setae Enoplobranchus sanguineus

3 Notopodial spinigers present on more

than 17 segments 4

675

- Notopodial spinlgers present on 17 or

fewer segments 5

4 Three pairs of branchiae, dendritically

branched Terebella rubra

Three pairs of branchiae, undivided

filaments Thelepus setosus

5 Notosetae present on 15 thoracic
segments; thoracic neurosetae have

a long shaft Tricobranchus glacialis

Notosetae present on 17 thoracic

segments; thoracic neurosetae have

no shaft 6

6 Two pairs of branchiae 7

Three pairs of branchiae 8

7 Branchiae appear as a tuft of filaments

born on a long, basal stalk Plsta cristata

Branchiae appear as dendritically branched

filaments born on a short, basal stalk. .. .Pista palmata

8 Tube composed of sand and shell; thoracic
uncini have 5 or 6 teeth, and abdominal

uncini have 4 Loimia medusa

Tube composed of silt and clay; thoracic

uncini have 7 teeth, and abdominal

uncini have 6 Loimia viridis

Enoplobranchus sanguineus (Verrill, 1873)
(Described and illustrated by Verrill, 1881)

Specimens were collected at a single station in upper
Tampa Bay, one in Boca Ciega Bay, and one in lower Tampa
Bay (table 306).

Average sediment type for the three localities was

676

poorly sorted, medium sand that had more than 20 percent
shell. Many of the shell particles were in the granule
and coarser size classes. The average content of silt and
clay was less than two percent, and organic carbon was
nearly one percent (table 307).

Algae were recorded at one station, but no sea grasses
were seen.

Neither gravid nor juvenile specimens were collected.

E. sanguineus has been collected in the Gulf of Mexico
and the western Atlantic from New England to the Caribbean.

677

Table 306. — Enoplobranchus sanguineus — Locality records

and number of individuals from survey stations,
Tampa Bay, Florida, 1963-69 (D-dredge, S-
shovel, N-net)

Upper Tampa Bay

Stations

Individuals Stations

Individuals

D S N

D S N

10-3

1

Boca Ciega Bay

16-6

1

Lower Tampa Bay

15-31

1

67e

Table 307. — Enoplobranchus sanguineus — Mean and range of
observed environmental factors from survey
stations, Tampa Bay, Florida, 1963-69

Factor

Mean

Range

Number
observations

Water temperature (*C.)

Salinity (%.)

PH

Depth (m. )

Sediment type

Granules (wt. %)

Sands (wt. %)

Silts (wt. %)

Clay (wt. %)

CaC03 (wt. %)

Organic carbon (wt. %)

Organic nitrogen (wt. %)

Mean grain size,
total sample (0)

Standard deviation,
total sample (0)

Skewness, total sample

Kurtosis, total sample

Mean grain size,
noncarbonate fraction (0)

Standard deviation,
noncarbonate fraction (0)

Mean grain size,
carbonate fraction (0)

Standard deviation,
carbonate fraction (0)

27.6

24.0

to 31.5

29.1

22.7

to 34.3

8.1

8..0

to 8.2

0.8

Zi

to 1.3

sand

shelly sand
to sand

9.1

1.3

to 21.5

89.3

78.5

to 96.2

1.3

0.0

to 2.1

0.3

0.0

to 0.5

21.4

19.8

to 23.6

0.9

0.4

to 1.2

0.04

0.01 to 0.1

1.7

0.8 to 2.4

1.7 1.3 to 2.3

-0.1 -0.5 to 0.1

2.9 -0.2 to 4.7

2.7 2.2 to 3.1

1.1 0.9 to 1.3
-0.7 -1.8 to 0.2

1.2 0.8 to 1.6

679

Loimla medusa (Savigny, 1820)
(Described and illustrated by Day, 1967)

Collections of this worm came from a total of 34
survey stations in all areas of the Estuary except Hills-
borough and Terra Cela Bays. Specimens were also taken at
three incidental stations in Boca Ciega Bay and lower
Tampa Bay (table 308).

Sediment data show that the worm occurred only in
sand that had a medium or fine texture. As an average,
the sand was poorly sorted, and contained about 13 percent
shell — some of which was in large particle size classes.
The average percentage of silt and clay was less than two
percent, but organic carbon was more than one percent
(table 309).

Eight bottom samples contained algae, and in addition,
two had shoal and turtle grass.

Gravid specimens were collected in July, and juveniles
were found from July through November.

L. medusa has a world-wide distribution in temperate
and tropical seas. It has been collected previously in
the Gulf of Mexico.

680

Table 308. — Loimia medusa — Locality records and number
of individuals from survey stations, Tampa
Bay, Florida, 1963-69 (D-dredge, S-shovel,
N-net)

Old Tampa Bay

Stations Individuals Stations Individuals

A-6

3-8

3

3-16

4-6

1

4-16

1

5-3

2

5-6

3

5-7

1

5-11

7

5-12

7

6-2

3

6-4-A

2

6-5

1

6-6

1

Upper Tampa Bay

10-3
10-4

2

1 10-6
10-7

1

1

Boca Ciega Bay

BC-C 1 D-25 3

BC-H 1 PB-1 4

BC-M 1 16-1 1

BC-N 3 16-6 1

Lower Tampa Bay

15-31 1
16-9-B 1

17-2 5

15-30 3 17-7 2

14-13

2

15-27

1

15-29

1

681

Table 309. — Loimia medusa — Mean and range of observed

environmental factors from survey stations,
Tampa Bay, Florida, 1963-69

Factor

Number

Mean

Ranc

ie

observations

27.8

16.8

to

32.7

28

27.3

21.0

to

35.1

28

8.0

7.8

to

8.3

24

1.4

£1

to

4.0

28

sand

—

26

1.9

0.0

to

14.7

26

96.3

83.5

to

99.9

26

1.2

0.0

to

6.5

26

0.7

0.0

to

3.6

26

13.1

0.7

to

43.3

26

1.1

0.2

to

2.9

15

0.1

0.00 tc

i 0.2

15

Water temperature ( *C. )

Salinity (%. )

pH

Depth (m.)

Sediment type

Granules (wt. %)

Sands (wt. %)

Silts (wt. %)

Clay (wt. %)

CaC03 (wt. %)

Organic carbon (wt. %)

Organic nitrogen (wt. %)

Mean grain size,
total sample (0)

Standard deviation,
total sample (0)

Skewness, total sample

Kurtosis, total sample

Mean grain size,
noncarbonate fraction (0)

Standard deviation,
noncarbonate fraction (0)

Mean grain size,
carbonate fraction (0)

Standard deviation,
carbonate fraction (0)

2.3

1.4 to 3.2

26

1.1

0.4

to

1.9

26

0.6

-1.0

to

2.4

26

17.5

0.1

to

62.5

25

3.2

2.5

to

7.1

25

1.7

0.7

to

3.2

25

-0.5

-2.3

to

1.8

23

1.3

0.2

to

2.0

23

682

Loimia viridls Moore, 1903
(Described and illustrated by Hartman, 1945)

This species was collected at five survey stations
and one incidental locality (Port Tampa) in Old Tampa Bay,
and at a single survey station in upper Tampa Bay as well
as one in Boca Ciega Bay (table 310).

Average sediment type was clayey sand that had a silt
and clay percentage of 24.8. The shell component was
small, but contained some large particles. The average
amount of organic carbon was less than one percent (table
311).

No bottom samples contained vegetation.

A juvenile worm was collected in August, but no gravid
specimens were recorded.

This species has been collected in the Gulf of Mexico
and along the Atlantic seaboard between North Carolina and
New England.

683

Table 310. — Loimia vlrldls — Locality records and number
of individuals from survey stations, Tampa
Bay, Florida, 1963-69 (D-dredge, S-shovel,
N-net)

Old Tampa Bay

Stations

Individuals Stations

Individuals

D

S

N

D S N

4-12

4-14
4-18-A

3

1
1

5-13
6-1-A

2

1

Upper Tampa Bay

11-8

1

Boca Ciega Bay

15-9

1

684

Table 311. — Loimia vlridls — Mean and range of observed
environmental factors from survey stations,
Tampa Bay, Florida, 1963-69

Factor

Water temperature (°C.)

Salinity (%„)

PH

Depth (m.)

Sediment type

Granules (wt. %)

Sands (wt. %)

Silts (wt. %)

Clay (wt. %)

CaC03(wt. %)

Organic carbon (wt. %)

Organic nitrogen (wt. %)

Mean grain size,

total sample (0) 4.0 2.4 to 7.1 7

Standard deviation,

total sample (0) 1.4 0.6 to 2.7 7

Skewness, total sample 0.5 -0.6 to 1.7 7

Kurtosis, total sample 11.8 -0.6 to 26.3 7

Kean grain size,

noncarbonate fraction (0) 2.9 1.8 to 3.7 7

Standard deviation,

noncarbonate fraction (0) 1.7 1.2 to 2.3 7

Mean grain size,

carbonate fraction (0) -0.5 -1.8 to 0.5 7

Standard deviation,

carbonate fraction (0) 1.3 1.0 to 1.7 7

Mean

1

*ange

Number
observations

29.5

26.8

to

32.0

7

25.7

24.1

to

33.0

7

8.0

7.8

to

8.1

7

1.4

/l

to

2.7

7

clayey
sand

sand
silt

to

clayey

7

0.2

0.0

to

0.5

7

74.9

16.2

to

99.4

7

9.3

0.2

to

50.2

7

15.5

0.7

to

65.9

7

5.6

0.7

to

21.9

7

0.4

0.2

to

0.6

2

0.03

0.02

! tc

i 0.05

2

685

Pista crlstata (Muller, 1776)
(Described and illustrated by Day, 1967)

Individuals were found at a total of 14 survey sta-
tions in all areas of the Estuary except Old Tampa and
Hillsborough Bays. More than one-half of these collections
were recorded in Boca Clega Bay (table 312).

Although one collection was made in silty sand, aver-
age sediment type was poorly sorted, medium sand. It con-
tained a moderate amount of shell, less than five percent
silt and clay, and nearly two percent organic carbon (table
313).

Vegetation was recorded in eight of 13 bottom samples.
Algae were present together with one or more species of
sea grass that included shoal, manatee, and turtle grass.

No gravid specimens were collected, but a juvenile
worm was found in February.

P. cristata is a cosmopolitan species, and has been
collected in the Gulf of Mexico.

686

Table 312. — Pista crlstata — Locality records and number
of individuals from survey stations, Tampa
Bay, Florida, 1963-69 (D-dredge, S-shovel,
N-net)

Upper Tampa Bay

Stations

Individuals Stations

Individuals

D S N

D S N

11-4

1 12-3

1

Boca Ciega Bay

BC-A

1

PB-4

2

D-2

2

PB-5

1

D-23

1

15-8

1

D-2 5

7

1

16-6

4

PB-1

1

Terra Ceia Bay

E-l

1

Lower Tampa Bay

16-27

6

17-8

1

687

Table 313. — Plsta crista ta — Mean and range of observed
environmental factors from survey stations,
Tampa Bay, Florida, 1963-69

Factor

Mean

Range

Number
observations

Water temperature (*C.)

Salinity (%„)

PH

Depth (m.)

Sediment type

Granules (wt. %)

Sands (wt. %)

Silts (wt. %)

Clay (wt. %)

CaC03 (wt. %)

Organic carbon (wt. %)

Organic nitrogen (wt. %)

Mean grain size,
total sample (0)

Standard deviation,
total sample (0)

Skewness, total sample

Kurtosis, total sample

Mean grain size,
noncarbonate fraction (0)

Standard deviation,
noncarbonate fraction (0)

Mean grain size,
carbonate fraction (0)

Standard deviation,
carbonate fraction (0)

22.6

14.7 to 29.5

13

31.2

24.7 to 34.3

13

8.1

7.9 to 8.4

12

0.9

£1 to 1.7

13

sand

sand to
silty sand

13

2.7

0.0 to 8.9

13

92.9

78.8 to 98.7

13

2.9

0.3 to 12.2

13

1.1

0.0 to 7.2

13

18.1

2.8 to 66.0

13

1.8

0.1 to 8.5

10

0.05

0.01 to 0.2

10

2.5 1.9 to 3.5 13

1.4 0.6 to 2.1 13
0.3 -0.6 to 1.7 13

6.5 1.0 to 25.7 13

3.4 2.1 to 9.0 11

1.2 0.4 to 1.9 11

0.2 -0.8 to 0.8 9

1.2 0.8 to 1.7 9

688
Pista palmata (Verrill, 1873)

Specimens were collected at a total of 20 survey sta-
tions in all areas of the Estuary except Old Tampa Bay and
Hillsborough Bay. In addition, P. palmata was recorded at
four incidental localities in Boca Ciega and lower Tampa
Bays. More than one-half of all collections were made in
Boca Ciage Bay (table 314).

One collection came from silty sand, but the rest
were all taken in shelly sand or sand. Average sediment
type was poorly sorted, fine sand. It had 15 percent shell,
somewhat more than five percent silt and clay, and under
one percent organic carbon(table 315).

Algae were present in six of 15 bottom samples along
with either shoal or turtle grass.

A gravid specimen was found in August and juvenile
worms were collected in February, May, and September.

This polychaete has been collected in the Gulf of
Mexico and is known along the Atlantic coast from Virginia
to New England.

689

Table 314. — Pista palmata — Locality records and number
of individuals from survey stations, Tampa
Bay, Florida, 1963-69 (D-dredge, S-shovel,
N-net)

Upper

Tampa

Bay

Stations

Individuals

Stations

Individuals

D

S N

D S N

11-4

12-14

12-16

2
1

1

13-3
13-13

2

1

Boca Ciega

Bay

BC-A

3

1

BC-I

1

BC-N

16

D-ll

1

D-22

1

D-25

1

12

PB-1

1

PB-4

4

PB-5

3

2

14-2

2

15-4

1

16-1

1

Terra Ceia Bay

E-2

Lower Tampa Bay

14-6

16-10

690

Table 315. — Pista palmata — Mean and range of observed

environmental factors from survey stations,
Tampa Bay, Florida, 1963-69

Factor

Mean

Range

Number
observations

Water temperature (*C.)
Salinity (%„)

pH

Depth (m.)

Sediment type

Granules (wt. %)

Sands (wt. %)

Silts (wt. %)

Clay (wt. %)

CaC03 (wt. %)

Organic carbon (wt. %)

Organic nitrogen (wt. %)

Mean grain size,
total sample (0)

Standard deviation,
total sample (0)

Skewness, total sample

Kurtosis, total sample

Mean grain size,
noncarbonate fraction (0)

Standard deviation,
noncarbonate fraction (0)

Mean grain size,
carbonate fraction (0)

Standard deviation,
carbonate fraction (0)

18.7

12.8 to 29.4

15

29.7

21.4 to 34.0

15

8.1

7.6 to 8.5

15

1.0

/l to 2.3

15

sand

shelly sand to
silty sand

14

2.7

0.0 to 21.4

14

90.7

77.8 to 99.9

14

4.3

0.1 to 12.2

14

1.8

O.'O to 7.2

14

15.0

1.2 to 75.1

14

0.4

0.1 to 1.5

11

0.01

0.00 to 0.04

11

2.6 0.4 to 3.5 14

1.4 0.5 to 2.1 14

0.5 -0.4 to 1.6 14

6.3 0.6 to 18.4 14

2.9 2.1 to 4.4 12

1.2 0.4 to 2.0 12

0.6 -1.6 to 2.2 10

1.2 0.6 to 2.6 10

691

Polycirrus eximius (Leidy, 1855)
(Described and illustrated by Verrill, 1873)

Hillsborough Bay was the only area of the Estuary
where P. eximius was not collected. Specimens came from
a total of 38 survey stations, and 24 of these were located
in lower Tampa Bay. At station 16-13, 58 specimens were
collected in a single dredge haul (table 316).

Shelly sand and sand were the only bottom types in
which the worm was collected. The average sediment was
poorly sorted, medium sand that contained more than 20
percent shell and very little silt and clay. Its organic
carbon content was one percent (table 317).

Algae were recorded at 14 of 34 dredge and shovel
stations. Sea grasses present with the algae included
shoal, manatee, or turtle grass.

A gravid specimen was recorded in December and juve-
nile worms were collected in August and December.

P. eximius has not been recorded for the Gulf of
Mexico. Otherwise, it is known along the Atlantic coast
from North Carolina to New England.

692

Table 316. — Polyclrrus exlmius — Locality records and

number of individuals from survey stations,
Tampa Bay, Florida, 1963-69 (D-dredge, S-
shovel, N-net)

Old Tampa Bay

Stations

Individuals Stations

Individuals

0

S

N

D S N

5-12
6-2

1

14

6-3
6-5

6 4
3

Upper Tampa Bay

10-3
11-4
12-11

3
2

1

13-6
1 13-10

1

3

Boca Ciega Bay

15-11

1

16-5

1

Terra Ceia Bay

E-4
E-7

1

1 E-8

3

Lower Tampa Bay

14-12

15-18

5

15-21

11

15-24

2

15-28

4

15-29

1

15-30

1

15-33

4

16-9

1

16-12

16-13

58

16-14

12

16-15

20

16-16

59

16-17

22

16-22

1

16-27

9

17-2

16

17-3

2

17-4

11

17-7

1

17-8

1

17-9

17-11

693

Table 317. — Polycirrus eximlus — Mean and range of observed
environmental factors from survey stations,
Tampa Bay, Florida, 1963-69

Number

Factor

Mean

Ranqe

observations

Water temperature (

"O

23.8

15.0 to 32.0

34

Salinity (%„)

30.2

22.7 to 34.5

34

pH

8.0

7.7 to 8.3

33

Depth (m. )

1.7

/l to 4 . o

34

Sediment type

sand

shelly sand
to sand

30

Granules (wt.

%)

3.2

0.0 to 21.5

30

Sands (wt. %)

95.0

78.5 to 99.8

30

Silts (wt. %)

1.3

0.0 to 7.1

30

Clay (wt. %)

0.4

0.0 to 3.2

30

CaC03 (wt. %)

26.6

2.2 to 85.2

30

Organic carbon (wt.

%)

1.0

0.03 to 8.5

27

Organic nitroc

|en (v\

t. %)

0.05

0.00 to 0.2

27

Mean grain size,
total sample (0)

Standard deviation,
total sample (0)

Skewness, total sample

Kurtosis, total sample

Mean grain size,
noncarbonate fraction (0)

Standard deviation,
noncarbonate fraction (0)

Mean grain size,
carbonate fraction (0)

Standard deviation,
carbonate fraction (0)

1.9 0.5 to 3.0 30

1.3 0.6 to 2.0 30

0.1 -1.4 to 1.7 30

7.3 -0.2 to 25.7 30

3.3 1.9 to 9.0 30

1.3 0.6 to 3.2 30

0.1 -1.8 to 1.7 25

1.2 0.8 to 2.1 25

694
Terebella rubra (Verrill, 1873)

Specimens were found at a total of 14 survey stations
in all areas of the Estuary except Old Tampa Bay and Hills-
borough Bay (table 318).

All were collected in medium or fine sand that was
poorly sorted. As an average, the percentage of shell in
sediments was 20, silt and clay amounted to nearly three
percent, and organic carbon was less than one percent
(table 319).

Algae were recorded in 75 percent of the bottom
samples.

Neither gravid nor juvenile specimens were found.

T. rubra has been collected in the Gulf of Mexico and
southern Florida as well as along the Atlantic coast be-
tween North Carolina and New England.

695

Table 318. — Terebella rubra — Locality records and number
of individuals from survey stations, Tampa
Bay, Florida, 1963-69 (D-dredge, S-shovel,
N-net)

Upper Tampa Bay

Stations

Individuals Stations

Individuals

D S N

D S N

11-6
13-4

3 13-7
1

1

Boca Ciega Bay

BC-N 1 PB-1 6

D-2 10 PB-5 4

D-22 1 15-6 1

Terra Ceia Bay

E-l

1

Lower Tampa Bay

17-6
17-7

1
1

17-15
1 18-3

1

1

696

Table 319. — Terebella rubra — Mean and range of observed
environmental factors from survey stations,
Tampa Bay, Florida, 1963-69

Number
Factor Mean Range observations

Water temperature CO 21.0 14.7 to 29.1 4

Salinity (%.) 28.2 24.3 to 29.9 4

pH 8.1 7.9 to 8.2 4

Depth (m.) 1.8 /I to 2.7 4

Sediment type sand — 4

Granules (wt. %) 1.6 0.1 to 4.9 4

Sands (wt. %) 95.5 92.8 to 97.5 4

Silts (wt. %) 1.9 1.0 to 2.9 4

Clay (wt. %) 1.0 0.3 to 1.5 4

CaC03 (wt. %) 20.0 2.9 to 41.4 4

Organic carbon (wt. %) 0.3 0.1 to 0.7 4

Organic nitrogen (wt. %) 0.04 0.01 to 0.1 4

Mean grain size,

total sample (0) 2.31 1.7 to 3.0 4

Standard deviation,

total sample (0) 1.2 1.0 to 1.6 4

Skewness, total sample 1.1 0.2 to 2.1 4

Kurtosis, total sample 12.5 3.5 to 20.1 4

Mean grain size,

noncarbonate fraction (0) 2.6 2.4 to 3.3 4

Standard deviation,

noncarbonate fraction (0) 0.9 0.4 to 1.5 4

Mean grain size,

carbonate fraction (0) 0.2 -0.1 to 0.6 2

Standard deviation,

carbonate fraction (0) 1.3 0.9 to 1.7 2

697

Thelepus setosus (Quatrefages, 1865)
(Described and illustrated by Hartrnan, 1969)

Specimens were often found attached to the base of
sea grasses, and were collected at a total of 24 survey
stations in all areas of the Estuary except Hillsborough
Bay. Fourteen survey localities and an incidental col-
lection were recorded in Boca Ciega Bay. Another incident-
al locality was situated near Mullet Key in lower Tampa
Bay (table 320).

All specimens from dredge and shovel samples were
taken in medium to very fine sand. Average sediment type
was poorly sorted, fine sand that had less than 10 per-
cent shell, over five percent silt and clay, and more
than one percent organic carbon (table 321) .

Every bottom sample contained algae and one or more
sea grasses that included turtle, manatee, or shoal grass.

Neither gravid nor juvenile specimens were recorded.

This polychaete has been recorded in the Gulf of
Mexico and otherwise has a cosmopolitan distribution in
temperate and tropical seas.

698

Table 320. — Thelepus setosus — Locality records and number

of individuals from survey stations, Tampa Bay,
Florida, 1963-69 (D-dredge, S-shovel, N-net)

Old Tampa Bay

Stations

Individuals Stations

Individuals

D S N

D S N

4-16

1

Upper Tampa Bay

10-1-A

1 10-3

1

Boca Ciega Bay

BC-M 2

BC-N 1

D-2 1

D-23 7

D-25 4 2

PB-1 1

PB-4 2 2

15-3

2 1

15-15

9

15-16

3

16-1

2

16-2

108

16-3

2

16-8

2

Terra Ceia Bay

E-6

1

Lower Tampa Bay

14-6

16-14

16-25

1

1

3

16-27

17-2

17-15

1

2

2

699

Table 321. — Thelepus setosus — Mean and range of observed
environmental factors from survey stations,
Tampa Bay, Florida, 1963-69

Factor

Number

Mean

Ranqe

observations

22.2

13.0 to 30.0

15

32.0

29.4 to 33.8

15

8.2

8.0 to 8.4

14

0.5

£1 to 1.7

15

sand

—

15

2.9

0.04 to 11.2

15

91.3

82.3 to 98.3

15

4.6

0.6 to 11.8

15

1.2

0.2 to 2.8

15

9.7

2.9 to 23.4

15

1.5

0.2 to 6.9

13

0.1

0.02 to 0.2

13

Water temperature (*C.)

Salinity (%„)

PH

Depth (m.)

Sediment type

Granules (wt. %)

Sands (wt. %)

Silts (wt. %)

Clay (wt. %)

CaCO, (wt. %)

Organic carbon (wt. %)

Organic nitrogen (wt. %)

Mean grain size,
total sample (0)

Standard deviation,
total sample (0)

Skewness, total sample

Kurtosis, total sample

Mean grain size,
noncarbonate fraction (0)

Standard deviation,
noncarbonate fraction (0)

Mean grain size,
carbonate fraction (0)

Standard deviation,
carbonate fraction (0)

2.6

1.4
0.4
6.6

2.6

1.2

0.7

1.3

1.9 to 3.4

0.9 to 2.0

-0.5 to 1.1

1.8 to 21.2

1.9 to 3.4
0.7 to 2.2

-0.8 to 2.4

0.9 to 2.3

15

15
15
15

15

14

14

14

700

Tricobranchus glacialis Malmgren, 1866
(Described and illustrated by Day, 1967)

The single specimen collected came from lower Tampa
Bay at station 16-27 (table 322).

There, the sediment was poorly sorted, fine sand
that contained slightly more than 10 percent shell, less
than five percent silt and clay, and very little organic
carbon (table 323).

Algae were recorded in the dredge sample, but no sea
grasses were present.

The specimen was neither gravid nor a juvenile.

T. glacialis has never before been collected in the
Gulf of Mexico, even though it is well known from many
localities throughout the world.

701

Table 322. — Tricobranchus qlacialis — Locality records and
number of individuals from survey stations,
Tampa Bay, Florida, 1963-69 (D-dredge, S-
shovel, N-net)

Lower Tampa Bay

Stations

Individuals Stations

Individuals

D S N

D S N

16-27

1

702

Table 323. — Trichobranchus qlacialis-'-Mean and range of
observed environmental factors from survey
stations, Tampa Bay, Florida, 1963-69

Factor

Mean

Range

Number
observations

Water temperature (*C.) 21.0

Salinity (%. ) 30.3

pH 8.0

Depth (m. ) 1.7

Sediment type sand

Granules (wt. %) 1.8

Sands (wt. %) 95.5

Silts (wt. %) 2.1

Clay (wt. %) 0.6

CaC03 (wt. %) 11.22

Organic carbon (wt. %) 0.2

Organic nitrogen (wt. %) 0.02

Mean grain size,

total sample (0) 2.3

Standard deviation,

total sample (0) 1.3

Skewness, total sample 0.3

Kurtosis, total sample 6.0

Mean grain size,

noncarbonate fraction (0) 2.1

Standard deviation,

noncarbonate fraction (0) 1.0

Mean grain size,

carbonate fraction (0) -0.8

Standard deviation,

carbonate fraction (0) 1.4

703
Family SABELLIDAE Malmgren, 1867

This is a very large family of polychaetes that con-
tains species which occur mostly in temperate and tropical
waters around the world. Sabellids feed on organic material
suspended in the water column, and some supplement their
diet by feeding on bottom deposits. The feeding mechanism
for Sabellastarte maqnifica has been described by Fitz-
simons (1965) .

Six sabellid species were collected in the Estuary.
Hillsborough Bay was the only area where none were found.
Fabricia sabella was the most widely distributed species,
and occurred in the areas between Old Tampa Bay and trans-
ect-18. Two other species, Branchionuna nigromaculata and
Sabella microphthalma, also ranged into the Estuary as far
as Old Tampa Bay. The remaining three, Chone duneri,
Mega 1 omnia bioculatum, and Meqaloroma lobiferum, were not
collected beyond lower Tampa Bay.
Key to SABELLIDAE Collected in Tampa Bay

1 Radioles have paired, external, cirriform
appendages Branchiomma nigromaculata

Radioles lack paired processes on

the outer surface 2

2 Two or more radioles have compound

eyes at the distal end 3

704

Radioles may have eyes, but not

compound ones 4

3 One pair of eyes present Megalomroa bioculatum

- Eyes small and numerous Meqalomma loblferum

4 Radioles joined by a membrane through

about one-half of their length Chone duneri

Radioles joined only at their bases 5

5 Numerous, small eyes spaced irregularly

along the length of radioles Sabella microphthalma

- One pair of eyes at the base of the
radioles and another on the

pygidium Fabricia sabella

Branch iomma nigromaculata (Baird, 1865)
(Described and illustrated by Jones, 1962)

Other than a single specimen collected by net in Old
Tampa Bay, all records were from Boca Ciega Bay and lower
Tampa Bay. The worm was found at a total of 53 survey
stations and six incidental localities. Forty-seven of
the survey stations were situated in Boca Ciega Bay. There,
at station 15-3, nearly 3,000 individuals were collected
in a single dredge haul (table 324).

Average sediment type at dredge and shovel stations
was poorly sorted, fine sand that had over 10 percent
shell, more than eight percent silt and clay, and nearly
one percent organic carbon (table 325). Mention should
also be made of the enormous numbers of this worm that were

705

noticed, but not recorded, attached to seawalls, pilings,
and floating docks. At survey stations, B. nigromaculata
was generally found on tunicates or sea grass.

One-half of the bottom samples contained algae as
well as one or more of all sea grasses found in the Es-
tuary, except widgeon grass.

Gravid specimens were collected in July and November,
while juveniles were found in January, February, May, and
from August through November.

B. nigromaculata has been collected in the Gulf of
Mexico and is otherwise known to occur in temperate to
tropical waters around the world.

706

Table 324. — Branchiomma niqromaculata — Locality records

and number of individuals from survey stations,
Tampa Bay, Florida, 1963-69 (D-dredge, S-
shovel , N-net)

Old Tampa Bay

Stations

Individuals Stations

Individuals

D S N

D S N

B-2

1

Boca Ciega Bay

BC-A

6

3

BC-C

13

BC-E

3

BC-G

93

BC-H

1

10

BC-I

6

3

BC-M

7

1

BC-M-

•1

3

BC-N

1

10

D-l

1

10

D-2

12

10

D-3

1

10

D-6

302

D-8

10

D-9

5

D-l 3

10

D-18

124

D-19-

•A

1

D-19-

■B

1

10

D-22

21

1

D-23

8

10

D-24

1

D-25

130

4

D-26

13

PB-I

1

25

PB-4

1

27

56

PB-5

288

32

14-2

2

14-4

23

10

15-1

1

1

15-3

2910

506

10

15-4

72

10

15-5

5

10

15-6

1C

15-11

1

10

15-12

1

1

15-14

?.

15-15

10

15-16

63

10

15-17

1

16-1

524

10

16-2

690

10

16-3

2

16-4

1

16-5

1

16-7

3

16-8

1

Lower Tampa Bay

15-18

10

15-30

2

4

15-31

1

15-32
17-13

707

Table 325. — Branchiomma niqromaculata — Mean and range of
observed environmental factors from survey
stations, Tampa Bay, Florida, 1963-69

Number
Factor Mean Range observations

Water temperature (*C.)

Salinity (%.)

pH

Depth (m.)

Sediment type

Granules (wt. %)

Sands (wt. %)

Silts (wt. %)

Clay (wt. %)

CaCO, (wt. %)

Organic carbon (wt. %)

Organic nitrogen (wt. %)

Mean grain size,

total sample (0) 2.8 1.4 to 7.1 43

Standard deviation,
total sample (0)

Skewness, total sample

Kurtosis, total sample

Mean grain size,
noncarbonate fraction (0)

Standard deviation,
noncarbonate fraction (0)

Mean grain size,
carbonate fraction (0)

Standard deviation,
carbonate fraction (0)

23.2

16.5

to

30.8

44

32.2

29.6

to

34.9

44

8.2

7.7

to

8.5

43

0.7

D-

to

2.3

44

sand

sand
silt

to

clayey

43

2.9

0.0

to

14.7

43

88.8

11.2

to

99.8

43

5.9

0.1

to

44.4

43

2.3

0.0

to

43.8

43

11.4

0.9

to

44.4

43

0.8

0.0]

. to 6.9

33

0.04

0.01

. to 0.2

33

1.5

0.5 to

2.5

43

0.3

-0.8 to

1.6

43

7.0

-0.04 to

24.4

43

3.0

1.9 to

8.7

41

1.2

0.5 to

2.4

41

0.5

-1.3 to

2.3

40

1.1

0.2 to

2.5

4 0

708

Chone duneri Malmgren, 1867
(Described and illustrated by Fauvel, 1927)

Specimens were found at five survey stations and one
incidental locality (Bunces Pass) in Boca Ciega Bay. A-
nother incidental locality was in lower Tampa Bay near
Mullet Key (table 326).

Sediment data show that C. duneri was collected only
in sand that was medium to very fine. The average amount
of shell present was over 18 percent, silt and clay amount-
ed to less than three percent, and organic carbon was over
one percent (table 327).

Algae were recorded in two of six bottom samples as
were shoal and turtle grass.

A juvenile specimen was collected in October, but no
gravid individuals were recorded.

C. duneri occurs along the coasts of Europe and New
England, but has not been previously recorded in the Gulf
of Mexico.

709

Table 326. — Chone dunerl — Locality records and number of
individuals from survey stations, Tampa Bay,
Florida, 1963-69 (D-dredge, S-shovel, N-net)

Boca

Ciega

Bay

Stations

Individuals

Stations

Individuals

D

S

N

D S N

BC-N
D-2S
PB-1

6

1

1
1

16-7
16-8

1

1

710

Table 327. — Chone dunerl — Mean and range of observed

environmental factors from survey stations,
Tampa Bay, Florida, 1963-69

Factor

Mean

Number
Range observations

Water temperature (*C.)

Salinity (%„)

PH

Depth (m. )

Sediment type

Granules (wt. %)

Sands (wt. %)

Silts (wt. %)

Clay (wt. %)

CaC03 (wt. %)

Organic carbon (wt. %)

Organic nitrogen (wt. %)

Mean grain size,
total sample (0)

Standard deviation,
total sample (0)

Skewness, total sample

Kurtosis, total sample

Mean grain size,
noncarbonate fraction (0)

Standard deviation,
noncarbonate fraction (0)

Mean grain size,
carbonate fraction (0)

Standard deviation,
carbonate fraction (0)

23.4

32.8

8.0

1.4

sand

5.3

91.8

2.1

0.5

18.6

1.1

0.04

15.0 to 30.0

31.3 to 34.0

7.9 to 8.3

IX to 2.3

0.0 to 14.7
83.5 to 97.8
0.6 to 5.6
0.0 to 1.1
2.7 to 38.2
0.4 to 2.6
0.03 to 0.07

2.2 1.4 to 3.0

1.2 0.6 to 2.0
-0.3 -1.7 to 0.8

4.7 0.3 to 17.9

3.3 2.7 to 3.6
1.3 0.7 to 2.2
0.8 -0.1 to 1.5
0.7 0.2 to 1.2

711

Fabricia sabella (Ehrenberg, 1837)
(Described and illustrated by Fauvel, 1927)

Twenty-two of the 39 survey stations where F. sabella
was collected were located in lower Tampa Bay. There was
one record from Old Tampa Bay and a few from each other
area except Hillsborough Bay. At some localities the worm
was extremely abundant. For example, 869 specimens were
taken in a single dredge haul at station 17-6 in lower
Tampa Bay (table 328).

All dredge and shovel collections came from either
shelly sand or sand. As an average, sediment was poorly
sorted, medium sand that contained more than 20 percent
shell, less than three percent silt and clay, and less than
one percent organic carbon (table 329).

Algae and one or more of all the sea grasses found in
the Estuary, except widgeon grass, were recorded in 16 of
the 35 bottom samples.

Neither gravid nor juvenile specimens were noted.

F. sabella has been recorded along the coasts of
Europe and eastern North America, but it has not been
collected before in the Gulf of Mexico.

712

Table 328. — Fabricia sabella — Locality records and number

of individuals from survey stations, Tampa Bay,
Florida, 1963-69 (D-dredge, S-shovel, N-net)

Old Tampa Bay

Stations

Individuals Stations

Individuals

D S N

D S N

6-2

1

Upper Tampa Bay

10-4
11-28

50 13-1-A
6 13-3

68
760

Boca Ciega Bay

BC-M
BC-N
D-17
D-22

156

1

1

10

1

15-14
16-3
16-4
16-5

14-10

26

14-16

1

15-23

2

15-31

34

15-33

2

16-9-B

3

16-13

108

16-15

12

16-17

16-23

10

16-25

]

.34

D-25

1 16-6

391

Terra Ceia Bay

E-5

1

1 E-6

17

41

Lower Tampa Bay

16-27

45

17-2

82

17-3

1

17-5

64

17-6

869

17-7

79

17-8

55

17-9

22

17-10

10

17-12

2

17-13

1

713

Table 329. — Fabricia sabella — Mean and range of observed
environmental factors from survey stations,
Tampa Bay, Florida, 1963-69

Factor

Water temperature (*C.)

Salinity (%,,)

PH

Depth (m. )

Sediment type

Granules (wt. %)

Sands (wt. %)

Silts (wt. %)

Clay (wt. %)

CaC03 (wt. %)

Organic carbon (wt. %)

Organic nitrogen (wt. %)

Mean grain size,
total sample (0)

Standard deviation,
total sample (0)

Skewness, total sample

Kurtosis, total sample

Mean grain size,
noncarbonate fraction (0)

Standard deviation,
noncarbonate fraction (0)

Mean grain size,
carbonate fraction (0)

Standard deviation,
carbonate fraction (0)

Number

Mean

Ranqe

observations

21.8

13.0 to 31.0

35

31.5

23.0 to 35.1

35

8.1

7.8 to 8.4

3 5

1.5

£1 to 4.0

35

sand

shelly sand
to sand

35

4.3

0.2 to 21.4

35

93.1

77.6 to 99.1

35

2.1

0.0 to 10.5

35

0.5

0.0 to 2.2

35

21.5

1.4 to 85.2

35

0.5

0.1 to 3.3

32

0.03

0.00 to 0.2

32

2.0 0.4 to 3.0 35

1.3 0.7 to 2.3 35

0.1 -1.7 to 1.3 35

7.1 0.3 to 21.2 34

2.8 1.4 to 5.5 33

1.1 0.5 to 3.2 33

0.2 -2.5 to 1.5 22

1.1 0.2 to 1.9 22

714

Megalomma bioculatum (Ehlers, 1887)
(Described and illustrated by Day, 1967)

This species was collected at a total of 27 survey
stations in Boca Ciega Bay, Terra Ceia Bay, and lower
Tampa Bay. Most of the stations were located in Boca
Ciega Bay (table 330).

Two collections were made in soft bottom, but the
rest came from sand. As an average, sediment type was
poorly sorted, very fine sand. It had 13 percent shell,
over 10 percent silt and clay, but very little organic
carbon (table 331).

Algae were recorded in one-third of the bottom
samples together with one or more species of sea grass
that included shoal, manatee, and turtle grass.

No gravid specimens were collected, but juvenile
worms were found in February, April, May, and September
through October.

This worm has been collected in the Gulf of Mexico
and is also known from temperate and tropical waters in
the eastern and western Atlantic. <■

715

Table 330. — Meqalomma bloculatum — Locality records and
number of individuals from survey stations,
Tampa Bay, Florida, 1963-69 (D-dredge, S-
shovel, N-net)

BC-A

3

BC-H

1

BC-I

4

BC-M

1

D-13

1

D-15

D-25

PB-1

21

PB-4

1

PB-5

1

14-2

8

E-l
E-3

14

Terra Ceia Bay

6
12

E-4
E-7

Boca Ciega Bay

Stations

Individuals Stations

Individuals

D S N

D S N

14-3

1

14-4

3

15-4

3

15-6

8

15-8

3

15-11

17

15-12

9

15-13

4

16-6

1

16-7

1

2
13

10

Lower Tampa Bay

16-27

17-13

716

Table 331. — Meqalomma bioculatum — Mean and range of

observed environmental factors from survey
stations, Tampa Bay, Florida, 1963-69

Factor

Mean

Range

Number
observations

Water temperature (*C.)

Salinity (.%.)

pH

Depth (m. )

Sediment type

Granules (wt. %)

Sands (wt. %)

Silts (wt. %)

Clay (wt. %)

CaC03 (wt. %)

Organic carbon (wt. %)

Organic nitrogen (wt. %)

Mean grain size,
total sample (0)

Standard deviation,
total sample (0)

Skewness, total sample

Kurtosis, total sample

Mean grain size,
noncarbonate fraction (0)

Standard deviation,
noncarbonate fraction (0)

Mean grain size,
carbonate fraction (0)

Standard deviation,
carbonate fraction (0)

20.6

31.1

8.1

0.9

sand

1.4
88.3
6.7
3.4
13.0
0.2
0.02

3.1

14.5 to 27.0

29.1 to 34.5
7.6 to 8.5

l_l to 1.7

sand to silty
clay

0.0 to 9.7

11.2 to 98.7
0.3 to 44.4
0.1 to 43.8
2.2 to 66.0
0.01 to 1.0
0.00 to 0.1

1.9 to 7.1

26
26
24
26
26

26
26
26
26
26
22
22

26

1.4 0.8 to 2.5 26

0.4 -0.9 to 1.6 26

7.7 -0.04 to 17.9 26

2.8 2.1 to 3.6 24
0.9 0.4 to 2.2 24
0.02 -2.3 to 2.3 21
1.1 0.6 to 2.9 21

717
Mega 1 omnia lobiferum (Ehlers, 1887)

Specimens were found at a single station in Boca
Ciega Bay, and at one in lower Tampa Bay (table 332).

At the one site for which sediment data are available,
the bottom was poorly sorted, medium sand. Shell content
was high, and some large fragments were present. The
percentage of silt and clay was under four, and organic
carbon amounted to less than one percent (table 333).

No vegetation was recorded at either station.

Neither gravid nor juvenile specimens were noted.

M. lobiferum has been recorded only in the Gulf of
Mexico.

713

Table 332. — Meqalomma lobiferum — Locality records and

number of individuals from survey stations,
Tampa Bay, Florida, 1963-69 (D-dredge, S-
shovel, N-net)

Boca Ciega Bay

Stations

Individuals Stations

Individuals

D S N

D S N

BC-N

1

Lower Tampa Bay

17-2

1

719

Table 333. — Meqalomma lobiferum — Mean and range of observed
environmental factors from survey stations,
Tampa Bay, Florida, 1963-69

Factor

Water temperature (*C.)

Salinity (%„)

PH

Depth (m.)

Sediment type

Granules (wt. %)

Sands (wt. %)

Silts (wt. %)

Clay (wt. %)

CaCO, (wt. %)

Organic carbon (wt. %)

Organic nitrogen (wt. %)

Mean grain size,

total sample (0) 1.9 — 1

Standard deviation,

total sample (0) 1.5 — 1

Skewness, total sample 0.5 ~ 1

Kurtosis, total sample 4.7 — 1

Mean grain size,

noncarbonate fraction (0) 3.5 — 1

Standard deviation,

noncarbonate fraction (0) 3.2 — 1

Mean grain size,

carbonate fraction (0) -0.1 — 1

Standard deviation,

carbonate fraction (0) 0.9 — 1

K e a n

:

(anc

le

Number
observations

26.8

24,

.1

to

29.

.4

2

34.2

34.

.0

to

34.

,5

2

8.1

8,

,0

to

8.

,2

2

3.0

2.

.3

to

4.

,0

2

sand

—

1

1.7

—

1

94.9

—

1

2.7

—

1

0.7

—

1

39.8

—

1

0.5

—

1

0.04

1

720

Sabclla raicrophthalma Verrill, 1873
(Illustrated by Smith, 1964)

S. microphthalma was collected at a total of 24 survey

stations in all areas of the Estuary except upper Tampa

Bay and Hillsborough Bay. One incidental collection came

from Old Tampa Bay, and another was recorded in lower

Tampa Bay. The area of greatest abundance was Boca Ciega

Bay where 19 collections were recorded (table 334).

Silty sand occurred at one station, but bottom type
at all others was sand. The sand was mostly fine and
poorly sorted. Average shell content was over 11 percent,
the silt and clay fraction was nearly seven percent, and
organic carbon was over one percent (table 335).

Vegetation was present in 11 of 15 bottom samples,
and consisted of algae and one or more of three sea grasses
shoal, manatee, and turtle grass.

Gravid specimens were recorded in July, November, and
December, while juveniles were collected in February, and
from August through November.

S. microphthalma has been recorded along the Atlantic
coast of the United States and in the Gulf of Mexico.

721

Table 334. — Sabella microphthalma — Locality records and
number of individuals from survey stations,
Tampa Bay, Florida, 1963-69 (D-dredge, S-
shovel, N-net)

Old Tampa Bay

Stations

Individuals

Stations

Individuals

B-2

5-4

Boca Ciega Bay

BC-A

1

BC-I

1

BC-M

32

37

BC-N

6

D-2

1

10

D-3

2 5

D-8

1

D-13

1

D-18

2

D-25

2

D-2 6

1

PB-1

1

100+

PB-4

4

10

PB-5

2

15-6

1

15-16

1

16-2

4

16-7

2

16-8

1

E-5

Terra Ceia Bay

Lower Tampa Bay

15-31

722

Table 335. — Sabella microphthalma — Mean and range of

observed environmental factors from survey
stations, Tampa Bay, Florida, 1963-69

Number
Factor Mean Range observations

Water temperature (*C.) 22.8 13.0 to 33.8 15

Salinity (%„) 30.6 21.4 to 34.9 15

PH 8.1 7..6 to 8.5 14

Depth (m.) 0.5 £L to 1.0 15

Sediment type sand sand to silty 14

sand

Granules (wt. %) 1.9 0.0 to 7.1 14

Sands (wt. %) 91.0 78.8 to 99.6 14

Silts (wt. %) 4.7 0.3 to 13.4 14

Clay (wt. %) 1.9 0.1 to 4.8 14

CaC03 (wt. %) 11.3 1.1 to 23.4 14

Organic carbon (wt. %) 1.1 0.2 to 4.8 10

Organic nitrogen (wt. %) 0.05 0.01 to 0.2 10

Mean grain size,

total sample (0) 2.8 1.8 to 3.5 14

Standard deviation,

total sample (0) 1.4 0.6 to 2.1 14

Skewness, total sample 0.5 -0.6 to 1.6 14

Kurtosis, total sample 8.3 1.3 to 31.2 14

Mean grain size,

noncarbonate fraction (0) 3.3 2.2 to 8.7 12

Standard deviation,

noncarbonate fraction (0) 1.3 0.7 to 2.2 12

Mean grain size,

carbonate fraction (0) 0.5 -1.8 to 2.3 12

Standard deviation,

carbonate fraction (0) 1.1 0.6 to 1.6 12

1.4

0.6

to

2.1

0.5

-0.6

CO

1.6

8.3

1.3

to

31.2

3.3

2.2

to

8.7

1.3

0.7

to

2.2

0.5

-1.8

to

2.3

1.1

0.6

to

1.6

723
Family SERPULIDAE Savigny, 1818

Members of this family construct calcareous tubes
that may be found attached to a variety of surfaces in
seas throughout the world. Serpulids feed on suspended
organic material, exclusively.

Three species were found in Tampa Bay. Spirorbis
spirillum was collected on the leaves of turtle grass and
other sea grasses in all areas of the Estuary except Old
Tampa and Hillsborough Bays. Eupomatus dianthus was found
on shells and rocks in Boca Ciega Bay and lower Tampa Bay,
and Salmacina dysteri was found on the underside of sub-
merged, wooden structures in Boca Ciega Bay.
Key to SERPULIDAE Collected in Tampa Bay
1 Operculum fitted with spines Eupomatus dianthus

- Operculum smooth and flat Spirorbis spirillum

- Operculum absent Salmacina dysteri

Eupomatus dianthus (Verrill, 1873)
(Described and illustrated by Hartman, 1945)

Specimens were collected at seven survey stations in
Boca Ciega Bay and at one in lower Tampa Bay (table 336).

Sediment at dredge and shovel stations was sand. As
an average, it was fine and poorly sorted. The mean per-
centage of shell was over 12, silt and clay content was

;-.".

724

lore than eight percent, and organic carbon was under
one percent (table 337).

Vegetation in both bottom samples consisted of algae,
and turtle grass.

A juvenile specimen was found in September, but no
gravid worms were seen.

E. di an thus has been collected in the Gulf of Mexico
and the western Atlantic between New England and the
Caribbean.

725

Table 336. — Eupomatus dianthus — Locality records and

number of individuals from survey stations,
Tampa Bay, Florida, 1963-69 (D-dredge, S-
shovel, N-net)

Boca Ciega Bay

Stations

Individuals Stations

Individuals

D S N

D S N

D-2
D-3

D-18
D-24

PB-1
PB-4
15-1

Lower Tampa Bay

17-2

726

Table 337. — Eupomatus dianthus — Mean "and range of observed
environmental factors from survey stations,
Tampa Bay, Florida, 1963-69

Factor

Water temperature (*C.)

Salinity (%„)

PH

Depth (m.)

Sediment type

Granules (wt. %)

Sands (wt. %)

Silts (wt. %)

Clay (wt. %)

CaC03 (wt. %)

Organic carbon (wt. %)

Organic nitrogen (wt. %)

Mean grain size,

total sample (0) 2.9 2.5 to 3.4 2

Standard deviation,

total sample (0) 1.9 1.8 to 1.9 2

Skewness, total sample -0.3 -0.6 to -0.01 2

Kurtosis, total sample 3.6 2.6 to 4.6 2

Mean grain size,

noncarbonate fraction (0) 2.9 2.7 to 3.1 2

Standard deviation,

noncarbonate fraction (0) 1.7 1.4 to 2.1 2

Mean grain size,

carbonate fraction (0) -0.2 -0.4 to 0.1 2

Standard deviation,

carbonate fraction (0) 1.2 1.0 to 1.4 2

Number

Mean

Ranqe

observations

26.3

25.5 to 27.0

2

34.0

33.2 to 34.9

2

8.2

—

2

0.3

—

2

sand

—

2

5.3

3.4 to 7.1

2

86.1

91.2 to 81.0

2

6.9

0.3 to 13.4

2

1.7

1.4 to 2.1

2

12.6

7.3 to 18.0

2

0.7

—

1

0.03

1

727

Salmaclna dysteri (Huxley, 1855)
(Described and illustrated by Fauvel, 1927)

Specimens were collected from the underside of
wooden, sediment trays that had been submerged in mari-
culture tanks at the National Marine Fisheries Service
dock on Boca Ciega Bay.

S. dysteri has been collected in the eastern and
western Atlantic, and in the Gulf of Mexico.

728

Spirorbis spirillum (Linnaeus, 1758)
(Described and illustrated by Fauvel, 1927)

This species was found in great profusion on the
leaves of sea grasses (especially turtle grass) at practi-
cally every station from upper Tampa Bay to transect-18.
Its distribution has not been listed by station because
the worm is not directly associated with sedimentary fea-
tures and many were collected on fragments of grass drift-
ing in the Estuary. In the tables summarizing polychaete
distribution and abundance, S. spirillum is listed under
the four most seaward areas of the Estuary, and under the
category headed, very common.

S. spirillum has been collected in the Gulf of Mexico
and around the world in warm seas .

CHAPTER 6
BIOGEOGRAPHY, REPRODUCTION, ABUNDANCE AND DISTRIBUTION

Concluding comments on the polychaete fauna in Tampa
Bay may be made on the basis of the preceding data relative
to individual species, and data on species composition and
numbers of individuals found at each survey station (Appendix
A and B) .

Biogeography

The total number of polychaete species collected in
Tampa Bay Estuary was 178 (table 338). They were divided
among 40 families and 130 genera. Two of the families
(PISIONIDAE and TROCHOCHAETIDAE ) have not been previously
reported from the Gulf of Mexico. Many of the undetermined
species (33) are certainly undescribed, and may include a
number that are indigenous to the Gulf. Among the species
that were determined, 35 are newly recorded from Gulf waters,
and have been designated by an asterisk in the table re-
ferred to above. The known geographic ranges of the worms
listed emphasize the observation made by Hartman (1951) that

729

730

Gulf polychaetes are an extremely heterogeneous group, and
in most instances, the resident species are found in ad-
jacent or more distant seas.

Reproduction

Considering the subtropical location of the Estuary,
and the geographic ranges exhibited by the polychaete fauna,
it is not surprising that juveniles or individuals with
mature gametes were recorded for 53 species in more than
one season. Of these, 12 species showed evidence of year-
round reproduction. If the period of intensive survey
sampling had been extended to one year, and time had per-
mitted dissection of each specimen, then I expect a far
greater number of species would have been found in breeding
condition throughout the year. Justification for such an
assumption is based on reports of year-round breeding among
many tropical and subtropical groups, and especially poly-
chaetes as reported in Biscayne Bay, Florida, by McNulty
and Lopez (1969).

Abundance and Distribution

Under this heading, the polychaetes collected in Tampa
Bay Estuary have been considered by species and as indivi-
duals in the overall estuarine system, and by areas, tran-
sects, and survey stations. Comparisons between worms from

731

stations, transects and areas are based on dredge samples
only in order to avoid the bias that would be introduced
by considering data collected with other sampling gear, or
in intertidal situations. Data from PB- stations have also
been omitted as those stations were sampled on more than
one occasion.
Species Diversity

The observed polychaete diversity in the Estuary (178
species) is greater than that reported for any single ent-
bayment in North America. Because of the polychaete variety,
and the large number of species recorded for other groups,
Tampa Bay may be classified as a natural, tropical system
of high diversity (Copeland, 1970) in which communities are
of the biologically accommodated type (Sanders, 1968). Ac-
cording to the thesis of Sanders, polychaete diversity in
the Estuary is a result of (1) mild climate, (2) correspond-
ingly moderate water temperature, (3) fairly high salinity
over a large area ,(4) sediments that are predominantly sand
and shell, and (5) high primary production. Provided with
such a favorable physical environment, time is also required
for the development of the subtle, intra-specific relation-
ships that are characteristic of biologically accommodated
communities. Time, however, may be a comparatively minor

732

factor for community development in Tampa Bay because Gulf
waters are part of the Atlantic circulation and have mixed
with the Pacific in recent time. From these more ancient
seas there has no doubt been a more or less uninterupted
influx of larval polychaetes that were, in many instances,
preadapted to conditions in Tampa Bay and the Gulf generally.

The total number of species found in each area of the
Estuary was as follows: Old Tampa Bay, 95; Hillsborough
Bay, 55; upper Tampa Bay, 113; Boca Ciega Bay, 156; Terra
Ceia Bay, 86; and lower Tampa Bay, 151 (table 338). The
average number of species collected per dredge sample from
the same areas was 14, 8, 15, 23, 27, and 22, respectively
(Appendix A and B) . The high species diversity observed
in most seaward areas of the Estuary was expected and is
directly related to high salinity (Wells, 1961) . The low
figure for Terra Ceia Bay was probably due to insufficient
sampling (eight stations) whereas the low figure recorded
for Hillsborough Bay is unquestionably a consequence of
pollution from domestic sewage and perhaps industry as well.
This conclusion is supported by other studies that show
there is great diversity among fishes, crustaceans, and
mollusks in all areas of the Estuary except Hillsborough
Bay. Other components of the benthos that indicate a high

733
degree of pollution In Hillsborough Bay by their rarity or
absence include sea grasses, echinoderms, lancelets (Branchio-
storna carlbaeum) and branchiopods (Glottidla pyramidata) .
The sludge deposited in Hillsborough Bay is unsuited for
most polychaetes and other bottom organisms because of its
fine texture and high BOD (Reish, 1959, 1967; Federal Water
Pollution Control Administration, 1969). Although fine sedi-
ments are not restricted to Hillsborough Bay, it is the only
area where they originate primarily from sewage solids. Aside
from a few isolated areas, adjacent stations where fine sedi-
ments were recorded were found in Old Tampa Bay (stations 3-4
through 3-7; 4-3 and 4-4), upper Tampa Bay (stations 11-7
through 11-14; 11-17 through 11-21; 11-23 and 11-24) and
Boca Ciega Bay (stations BC-H, D-4, D-7, D-8, D-14, D-15,
D-16. D-20, D-21 and D-24) . No silty or clayey bottoms were
recorded in lower Tampa Bay or Terra Ceia Bay. At the 11
stations where soft sediments (greater than 20 percent silt
and clay) were found in Hillsborough Bay, the average number
of species collected per station was four. Sediments of
similar texture in Old Tampa Bay (six stations) had an aver-
age of 13 species per station; soft sediments in upper Tampa
Bay (16 stations) had an average of 14 species; and in Boca
Ciega Bay, the 10 stations with fine sediments had an average

7 34

of nine species per station. Except for stations D-20,
D-21, and BC-H, the fine sediments recorded in Boca Ciega
Bay were all situated in deeply dredged access canals be-
tween land-fills. Such areas are closed at one end and
have restricted water circulation. Bottom water in these
canals and in Hillsborough Bay are the only areas of the
Estuary where zero DO has been recorded.

Seventy-nine, or about 45 percent, of the polychaetes
recorded for the Estuary were collected at one or more of
the 49 stations where sediments proved to be silty or clayey.
Eight of these species occurred at 20 or more of the sta-
tions where fine sediment was recorded and another seven
were found at 15 or more localities where the bottom was
soft — Paraprlonosplo pinnata (41), Splochaetopterus c.
oculatus (36), Glycinde pacifica (29), Parahesione luteola
(29), Gyptis vittata (25), Cistenides gouldll (21), Phyllodoce
arenae (21). Nereis succinea (20), Sthenelals boa (18), Pseudeury-
thoe ambigua (18). Sigambra tentaculata (18), Polynoid B (17),
Pseudopolydora sp. (15), Streblosplo benedicti (15), Prlonospio
cirrobranchiata (15). The 15 worms listed above comprise
only about nine percent of the species recorded in the Es-
tuary, and the majority of them were found more commonly
in areas of sandy or shelly sediment. Three species, however.

735

were collected mostly In sediments composed of more than
20 percent silt and clay, and may be considered as worms
that are indicative of soft sediments — Parahesione
luteola. Sigambra tentaculata. and Polynoid B.

Johnson (1970) pointed out that eurytoplc species are
the ones most likely to persist in areas of environmental
stress. This principle apparently applies to the poly-
chaetes collected from deposits of silt and clay in Tampa
Bay Estuary. Seven of the species found at 15 or more sta-
tions where soft bottom was recorded were also among the
17 species found at 100 or more localities in the Estuary
as a whole — Nereis succlnea. Splochaetopterus c. oculatus,
Paraprionosplo plnnata. Phyllodoce arenae, Gyptls vittata.
Glvcinde pacifica, Cistenides gouldii . Of these, the first
three species were collected at 200 or more localities and
were the most widely distributed polychaetes found in the
Estuary. It is of interest to note that the first (Nereis
succlnea) is an omnivore, the second ( Splochaetopterus c.
oculatus ) is a suspension feeder, and the third (Paraprionos-
plo pinna ta) is a deposit feeder. With few exceptions, the
species listed as very common (table 338) have all been col-
lected in the southeastern United States where estuarine
systems have not been drastically disturbed. As a group.

736

they may be regarded as Indicators of natural or nearly
natural waters and sediments.
Numbers of Individuals

In Tampa Bay, there was a direct relation between
species diversity and numbers of individuals per dredge
sample. That is, the average number of individuals per
sample was greater in lower Tampa Bay (318), Terra Ceia
Bay (363), and Boca Clega Bay (349), than in upper Tampa
Bay (274), or in Old Tampa Bay (168) and Hillsborough Bay
(225). The difference in figures for Old Tampa Bay and
Hillsborough Bay is noteworthy because it indicates that
sewage pollution has benefited the comparatively few poly-
chaete species that remain in Hillsborough Bay. Those
that are apparently favored by organic enrichment are
Streblospio benedicti and Capltella capitata. These worms
were the only ones found in Hillsborough Bay that occurred
in abnormally high numbers (over 200 individuals per sta-
tion) . Both species have been noted in areas of high or-
ganic pollution in estuaries on the east and west coasts
of the United States (Wass, 1967; Dean, 1970). If only the
soft bottom areas in Hillsborough Bay and access canals in
Boca Ciega Bay are compared in terms of average species
diversity and number of individuals per dredge sample (less

7 37

than six for both calculations in both areas) it is evi-
dent that bottom conditions in these localities have
deteriorated to the point where practically no worms can
survive. As noted by Leppakoski (1969) and others, poly-
chaetes are usually the last benthic metazoans that sur-
vive in sediments where organic pollution reduces DO to
zero or nearly zero for prolonged periods. At present,
polychaetes and a few mollusks are the only benthic in-
vertebrates that persist over large areas of Hillsborough
Bay and in the access canals of Boca Ciega Bay (Sykes and
Hall, 1970; Taylor, Hall, and Saloman, 1970). On the basis
of data from studies of sewage pollution in Biscayne Bay,
Florida, it seems unlikely that these two impoverished
areas will ever support a normal assemblage of polychaetes
and other benthos.
Blomass

If the average number of individuals per dredge sample

from all areas of the Estuary is multiplied by 3.3 (to con-

2
vert the area dredged to In. ) then the overall mean be-

2

comes 1314 polychaetes/m. Data from more quantitative,

blomass samples (figure 1) show that polychaetes comprise
about 50 percent of the infauna. Therefore, an average
figure for the blomass of all benthic invertebrates would

7 38

2

be on the order of 2600 animals/m. for Tampa Bay Estuary.
These figures for polychaetes, and other bottom fauna, are
about average when compared with biomass data from other
estuarine systems (Sanders, 1956, 1960; McNulty, 1961;
Gordon, 1966; Mclntyre and Eleftheriou, 1968; Lie, 1969;
Peer, 1970; Stephenson, Williams, and Lance, 1970).

No attempt has been made to determine the average dry
weight of worms/m.2, however, a figure of 137 g./m.2 was
previously reported for all benthlc invertebrates in an
undisturbed area of Boca Ciega Bay (Taylor and Saloman,
1968). This figure ia quite high and exceeds by a factor
of two the figure reported by Sanders, Goudsmit, Mills,
and Hampson (1962) for a rich intertidal area in Barnstable
Harbor, Massachusetts.

A start has been made toward understanding the origin,
systematics, and distribution of polychaete worms in Tampa
Bay Estuary. The embayment supports a rich and diverse
polychaete fauna, but in some areas the unfortunate activities
of man have made the bottom uninhabitable for most worms
and other bottom life. Further work along the same lines
of research is desirable, and background information is now
available to begin studies on the role of polychaetes in es-
tuarine processes — especially those that lead to the pro-
duction of species that are directly useful to man.

7 39

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CO

APPENDIX A

In this appendix, the polychaetes collected at
special, lettered stations in Tampa Bay Estuary from
June through December, 1963, are listed by family and
species; and the number of individuals taken by dredge,
shovel, or net is indicated. Sediment characteristics
and the collection date for each station are also in-
cluded.

749

STATION A

Sediment Type: Sand

Weight Percentages — Granules: 0.0

Silts: 0.4

750

Date: June 20

Sands: 99.4
Clay: 0.2

Family and Species

Dredge Shovel Net

POLYNOIDAE

Polynoid B

NEREIDAE

Nereis succinea

GLYCERIDAE

Glycera americana

GONIADIDAE

Glycinde pacif ica

ONUPHIDAE

Diopatra cuprea

PARAONIDAE

Aricidea sp.

SPIONIDAE

Prionospio cirrobranchiata

CHAETOPTERIDAE

Spiochaetopterus c. oculatus

1
2
10
4
2
3
1
1

10

STATION A-l

751

Sediment Type: Shelly Sand

Weight Percentages — Granules: 34.5

Silts: 5.0

Date: June 25

Sands:
Clay:

58.0
2.6

Family and Species

Dredge Shovel Net

PHYLLODOCIDAE

Phyllodoce f ragilis

NEREIDAE

Laeonereis culveri
Nereis succinea
Perinereis f loridana

GLYCERIDAE

Glycera americana

EUNICIDAE

Marphysa sanguinea

SPIONIDAS

Polydora socialis

PECTINARIIDAS

Cistenides qouldii

AKPHARETIDAE

Melinna maculata

24
31
17

65
1
2

752

STATION A-2

Sediment Type: Sand Date: July 5

Weight Percentages — Granules: 0.2 Sands: 94.3

Silts: 3.2 Clay: 2.4

Family and Species Dredge Shovel Net

GLYCERIDAE

Glycera americana 2

GONIADIDAE

Glycinde pacif ica 1

ORBINIIDAE

Scoloplos robustus 3

CHAETOPTERIDAE

Spiochaetopterus c. oculatus 1

CAPITELLIDAE

Heteromastus f iliformis 8

ARENICCLIDAE

Arenicola cristata 1

AMPHARETIDAE

Melinna maculata 18

Sabellides oculata 15

STATION A-3

753

Sediment Type: Sand

Weight Percentages — Granules: 6.0

Silts: 11.9

Date: July 5

Sands: 72.9

Clay: 9.1

Family and Species

Dredge Shovel Net

PHYLLODOCIDAE

Eteone heteropoda

NEREIDAE

Laeonereis culveri
Nereis succinea

1

65

EUNICIDAE

Marphysa sanguinea

SPIONIDAE

Polydora socialis
Polydora websteri
Streblospio benedicti

CAPITELLIDAE

Heteromastus f iliformis

AMPHARETIDAE

Melinna maculata

13

6
1

25

754

STATION A-4

Sediment Type: Sand Date: July 5

Weight Percentages — Granules: 0.2 Sands: 98.3

Silts: 0.9 Clay: 0.6

Family and Species Dredge Shovel Net

No Polychaetes Recorded

755

STATION A-5

Sediment Type: Sand Date. July 5

Weight Percentages — Granules: 0.6 Sands: 98.5

Silts: 0.7 Clay: 0.2

Family and Species Dredge Shovel Net

NEREIDAE

Laeonereis culveri 303

Nereis succinea 3

GLYCERIDAE

Glycera americana 1

ORBINIIDAE

Scoloplos robustus 5

CAPITELLIDAE

Heteromastus f iliformis 13

AMPHARETIDAE

Sabellldes oculata 2

756

STATION A-6

Sediment Type: Sand Date: July 18

Weight Percentages — Granules: 0.0 Sands: 98.8

Silts: 0.5 Clay: 0.7

Family and Species Dredge Shovel Net

PHYLLODOCIDAE

Steone heteropoda 6

Phyllodoce arenae 3

NEREIDAE

Laeonereis culveri 54

GLYCERIDAE

Glycera amerlcana 3

GONIADIDAE

Glyclnde paciflca 2

EUNICIDAE

Karphysa sanquinea 1

ORBINIIDAE

Scoloplos robustus 4

CHASTCPTERIDAE

Spiochaetopterus c. oculatus 1

CAPITELLID\E

Capitella capita ta 2

Heteromastus f iliformis 8

ARENICOLIDAE

Arenicola crista ta 2

MALDANIDAE

Clymenella mucosa 84

TEREBELLIDAE

Loimia medusa 1

757

Sediment Type: Sand
Weight Percentages -

STATION B

Granules:
Silts:

0.0
0.8

Date: June 25

Sands:
Clay:

94.0
5.2

Family and Species

Dredge Shovel Net

POLYNOIDAE

Polynoid B

PHYLLODOCIDAE

Eteonc he teropoda
Sumida sanquinea
Phyllodoce arenae

HSSIONIDAE

Gyptis vittata

NEREIDAE

Nereis succinea

NEPHTYIDAE

Nephtys picta

GLYCSRIDAE

Glycera americana

GONIADIDAE

Glycinde pacif ica

ONUPHIDAE

Diopatra cuprea

ORBINIIDAE

Scoloplos rubra

SPIONIDAE

Paraprionospio pinnata
Prionospio cirrobranchiata
Streblospio benedicti

CHAETOPTERIDAE

Spiochaetopterus c. oculatus

CAPITELLIDAE

Heteromastus f iliformls

12

3
7

2

32

2
30
13
15

55
1

758

STATION B — (Continued)

Family and Species

Dredge Shovel Net

PECTINARIIDAE

Cistenides gouldii

10

AMPHARETIDAE

Melinna maculata

STATION B-l

759

Sediment Type: Sand

Weight Percentages — Granules: 0.1

Silts: 0.9

Date: July 31

Sands: 98.1
Clay: 0.8

Family and Species

Dredge Shovel Net

PHYLLODOCIDAE

Eumida sanquinea

HESIONIDAE

Gyptis vittata

SYLLIDAE

Exoqone dispar

NEREIDAE

Nereis succinea

GLYCERIDAE

Glycera americana

ONUPHIDAE

Diopatra cuprea

ORBINIIDAE

Scoloplos robustus

PARAONIDAE

Aricidea sp.

SPIONIDAE

Paraprionospio pinnata
Polvdora websteri

CHAETOPTERIDAE

Spiochaetopterus c. oculatus

CAPITELLIDAE

Capitella capitata
Capitellides Jonesi

ARENICOLIDAE

Arenlcola crista ta

1

22

1

2

9

218

10

14

760

STATION B-l — (Continued)

Family and species Dredge Shovel Net

MALDANIDAE

Clymenella mucosa 13

PECTINARIIDAE

Cistenides gouldii 1 io

AMPHARETIDAE

Melinna maculata 5

STATION B-2

761

Sediment Type: Sand

Weight Percentages — Granules:

Silts:

Date: July 31

0.0

Sands: 92.9

3.3

Clay: 3.7

Family and Species

Dredge Shovel Net

AMPHINOMIDAE

Pseudeurythoe ambigua

HESIONIDAE

Gyptis vittata

PILARGIDAE

Ancistrosyllis jonesi

SYLLIDAE

Exoqone dispar

NEREIDAE

Nereis succinea

GLYCERIDAE

Glycera americana

GONIADIDAE

Glycinde pacif ica

ONUPHIDAE

Diopatra cuprea

ARABELLIDAE

Arabella iricolor

ORBINIIDAE

Scoloplos robustus
Scoloplos rubra

PARACNIDAE

Aricidea taylori
Aricidea sp.

SPIONIDAE

Polydora socialis
Polydora websteri
Prionospio h. texana
Pseudo polydora sp.

36

2

1

2 4

11

5

2

3

23

2

12
15

2
3

2

1
1
8
4

3

762

STATION B-2 — (Continued)

Family and Species Dredge Shovel Net

MAGELONIDAE

Kagelona pettiboneae 9

CHAETOPTERIDAE

Spiochaetopterus c. oculatus 3

CAFITSLLIDAE

Capitella capltata 3

Heteromastus filiformis 1

MALDANIDAE

Clymenella mucosa

Kaldane sarsi 2

PECTINARIIDAE

Cistenides gouldii 2

SABELLIDAE

Branchlomma nigromaculata

Sabella microphthalma 1

STATION B-3

763

Sediment Type: Sand
Weight Percentages -

Granules:
Silts:

0.2
3.0,

Date: July 25

Sands: 95.8
Clay: 1.0

Family and Species

Dredge Shovel Net

PHYLLODOCIDAE

Eteone heteropoda

NEREIDAE

Laeonereis culveri
Nereis succinea

GYLCERIDAE

Glycera americana

GONIADIDAE

Glycinde pacif ica

CAPITELLIDAE

Capitella capitata
Heteromastus filiformis

59
15

764

STATION C

Sediment Type: Clayey Sand

Weight Percentages — Granules: 0.7

Silts: 16.6

Date: Aug. 13

Sands: 68.3
Clay: 14.4

Family and Species

Dredge Shovel Net

PHYLLODOCIDAE

Eteone heteropoda

HESIONIDAE

Parahesione luteola

NEREIDAE

Nereis succinea

GONIADIDAE

Glycinde pacif ica

EUNICIDAE

Karphysa sanquinea

SPIONIDAE

Polydora websteri
Streblospio benedicti

CAPITELLIDAE

Capitella capitata

5
42
33

3

3

35
2

765

STATION C-l
Sediment Type: Sand
Weight Percentages — Granules: 7.8

Silts:

3.4

Date: Aug. 13

Sands: 88.3
Clay: 0.6

Family and Species

Dredge Shovel Net

PHYLLODOCIDAE

Steone heteropoda

HESIONIDAE

Gyptis vittata

NEREIDAE

Laeonereis culveri

ONUPHIDAE

Diopatra cuprea

EUNICIDAE

Marphysa sanquinea

ORBINIIDAE

Scoloplos robustus

PARAONIDAE

Aricidea sp.

SPIONIDAS

Polydora websteri
Streblospio benedicti

CHAETCPTERIDAE

Spiochaetopterus c oculatus

CAPITELLIDAE

Heteromastus f iliformis

AMPHARETIDAE

Melinna maculata

41
13

11

10

STATION C-2

766

Sediment Type: Sand

Weight Percentages — Granules: 1.4

Silts: 0.9

Date:

Aug

Sands: 97.3
Clay: 0.4

13

Family and Species

Dredge Shovel Net

PHLLODOCIDAE

Steone heteropoda

HESIONIDAE

Gyptis vittata
Parahesione luteola

51

29

NSREIDAE

Laeonereis culveri
Nereis succinea

1
71

71

N5PHTYIDAE

Nephtys picta 1

GONIADIDAE

Glycinde pacifica 54

ONUPHIDAE

.Oiopatra cuprea 25

EUNICIDAE

Karphysa sanguinea 2

ORBIMIIDAE

Scoloplos rubra 1

PARAONIDAE

Aricidea sp. 2

SPIONIDAE

Paraprionospio pinnata 51

Polydora websteri 43

iitreblospio benedicti 139

CHAETOPTERIDAE

Spiochaetopterus c. oculatus 1

CIRRATULIDAE

Tharyx sp. C 2

3

16

1

767

STATION C-2 — (Continued)

Family and Species

Dredge Shovel Net

CAPITELLIDAE

Capitellides jonesi

PECTINARIIDAE

Cistenides qouldii

AMPHARETIDAE

Melinna maculata

768

STATION C-3

Sediment Type: Sand Date: Aug. 15

Weight Percentages — Granules: 1.3 Sands: 92.0

Silts: 3.6 Clay: 3.1

Family and Species Dredge Shovel Net

AMPHINOMIDAE

Pseudeurythoe ambiqua 4

PHYLLODOCIDAE

Phyllodoce arenae 4

HESIONIDAS

Parahesione luteola 23

NE RE I DAE

Nereis succinea 96 212

Nicon lackeyi 1

GLYCERIDAE

Glycera americana 12

GONIADIDAE

Glycinde pacif ica 3

ONUFHIDAE

Diopatra cuprea 1 1

ORBINIIDAE

Scoloplos rubra 5

SPIONIDAE

Paraprionospio pinnata 4 56

Polydora socialis 1

Polydora websteri 45 36

Prionospio cirrobranchiata 3

Streblospio benedicti 14 107

PECTINARIIDAE

Cistenides qouldii 3 . l

STATION C-4

769

Sediment Type: Sand

Weight Percentages — Granules: 0.6

Silts: 3.3

Date:

Aug

Sands: 94.4
Clay: 1.7

15

Family and Species

Dredge Shovel Net

PHYLLODOCIDAE

Eteone heteropoda

NEREIDAE

Laeonereis culveri
Nereis succinea

ORBINIIDAE

Scoloplos robustus

SPIONIDAE

Paraprionospio pinnata
Polydora websteri
Streblospio benedicti

CAPITELLIDAE

Capltella capitata

13

23
11

3
50
23

116

770

STATION C-5

Sediment Type: Sand
Weight Percentages -

Date: Aug. 1

Granules:

0.0

Sands: 97.2

Silts:

2.8

Clay: 0.0

Family and Species Dredge Shovel Net

NEREIDAE

Nereis succinea 4 5

ONUPHIDAE

Diopatra cuprea 10

SPIONIDAE

Paraprionospio pinnata 1 2

golydora websteri 1 1

Streblospio benedicti 10

CHAETOPTERIDAE

Spiochaetopterus c. oculatus 1 10

CAPITELLIDAE

Capitella capitata 5

PECTINARIIDAE

Cistenides gouldii 1

771

STATION C-6

Sediment Type: Sand Date: Aug. 15

Weight Percentages — Granules: 0.4 Sands: 97.5

Silts: 1.4 Clay: 0.7

Family and Species Dredge Shovel Net

HESIONIDAE

Gyptis vittata 1

NEREIDAE

Nereis succinea 2

ONUPHIDAE

Diopatra cuprea 31 10

SPIONIDAE

Paraprionospio pinnata 1

Polydora websterl 13

Streblospio benedicti 8 23

CHAETOPTERIDAE

Spiochaetopterus c.. oculatus 1 10

PSCTINARIIDAE

Cistenides qouldii 10

772

STATION C-7

Sediment Type: Shelly Sand Date: Aug. 21

Weight Percentages — Granules: 45.2 Sands: 54.5

Silts: 0.3 Clay: 0.0

Family and Species Dredge Shovel Net

NEREIDAB

Nereis succinea 2

GLYCSRIDAE

Glycera americana 2

ONUPHIDAE

Diopatra cuprea 3

DORVILLEIDAE

Dorvillea rudolphi X

773

STATION C-8

Sediment Type: Sand Date: Aug. 22

Weight Percentages — Granules: 0.4 Sands: 95.1

Silts: 3.6 Clay: 0.9

Family and Species Dredge Shovel Net

ONUPHIDAE

Diopatra cuprea 2

CHAETOPTERIDAE

Spiochaetopterus c. oculatus 1

PECTINAR1IDAE

Cistenides gouldil 1

774

STATION C-8-1

Sediment Type: Sand Date: Aug. 22

Weight Percentages — Granules: 0.6 Sands: 91.7

Silts: 4.0 Clay: 3.7

PHYLLODOCIDAE

Eteone heteropoda

NEREIDAE

Nereis succinea

ONUPHIDAE

Diopatra cuprea

PECTINARIIDAE

Cistenides gouldii

Family and Species Dredge Shovel Net

775

STATION C-8-2

Sediment Type: Sandy Mud

Weight Percentages — Granules: 0.1

Silts: 37.5

Date: Aug. 22

Sands: 41.4
Clay: 21.1

Family and Species

Dredge Shovel Net

NEREIDAE

Laeonereis culveri
Nereis succinea

ONUPHIDAE

Diopatra cuprea

SPIONIDAE

Polydora socialis

PECTINARIIDAE

Cistenides qouldii

776

STATION C-9

Sediment Type: Shelly Sand Date: Aug. 27

Weight Percentages — Granules: 46.2 Sands: 53.5

Silts: 0.2 Clay: 0.0

Family and Species Dredge Shovel Net

AMPHINOMDAS

Pseudeurythoe ambiqua 1

NEREIDAE

Laeonereis culver! 1

Nereis succinea 8

SPIONIDAE

Streblospio benedicti 1

CHA3T0PTERIDAE

Spiochaetopterus c. oculatus 1

CAPITELLIDAE

Capitella capitata 23

STATION D

777

Sediment Type: Sand

Weight Percentages — Granules: 5.5

Silts: 0.0

Date: Dec. 6

Sands:
Clay:

94.5
0.0

Family and Species

Dredge Shovel Net

PHYLLODOCIDAE

Phyllodoce arenae

NEREIDAE

Nereis arenaceodentata
Nereis £. occidentalis
Nereis succinea

GONIADIDAE

Glycinde paclf ica

ORBINIIDAE

Scoloplos fragilis

PARAON1DAE

Aricidea fragilis

SPIONIDAE

Apoprionospio pyqmaea
Polydora socialis

OPHELIIDAE

Travisia sp.

MALDANIDAE

Clymenella mucosa

778

STATION D-l

Sediment Type: Sand Date: Sept. 23

Weight Percentages — Granules: 0.1 Sands: 97.9

Silts: 1.8 Clay: 0.2

Family and Species Dredge Shovel Net

POLYNOIDAE

Folynoid B 1

PHYLLODOCIDAE

Eteone heteropoda 1

NEREIDAE

Nereis arenaceodentata 6 5

Nereis succinea 1

GONIADIDAE

Glycinde pacif ica 5

ONUPHIDAE

Diopatra cuprea 1

Onuphis sp. 1 1

PARAONIDAE

Aricidea f raqilis 10

SPICNIDAE

Apoprionospio pyqmaea 5

P araprionospio pinnata 31

Streblospio benedicti 26

CHAETOPTERIDAE

Spiochaetopterus c. oculatus 1

CAPITELLIDAE

Capitella capitata 6

jasybranchus lunulatus 1

ARENICOLIDAE

Arenicola cristata 1

KALDANIDAE

Clymenella mucosa 1

SABELLIDAE

Branchiomma nigromaculata 1 10

779

STATION D-2

Sediment Type: Sand
Weight Percentages -

Granules:
Silts:

7.1
0.3

Date: Sept. 23

Sands:
Clay:

91.2
1.4

Family and Species

Dredge Shovel Net

PHYLLODOCIDAE

Eteone heteropoda

Sumida sanquinea
Phyllodoce arenae
Phyllodoce fraqilis

HESIONIDAE

Gyptis vittata

SYLLIDAE

Autolytus cornutus
Syllis sp. B

NEREIDAE

Nereis arenaceodentata
Nereis p_. occidentalis
Nereis succinea

GONIADIDAE

Glycinde pacif ica

ONUPHIDAE

Diopatra cuprea
Onuphis sp.

EUNICIDAE

Karphysa sanquinea

ARABELLIDAE

Drilonereis lonqa
Drilonereis magna

DORVILLSIDAE

Dorvillea rudolphi

ORBINIIDAE

Scoloplos robustus
Scoloplos rubra

PARAONIDAE

Aricidea fraqilis

13

2

12

342
23

1

3

93

40

2

66

10

STATION D-2 — (Continued)

780

Family and Species

Dredge Shovel

Net

SPIONIDAE

Apoprionospio pygmaea
Paraprionospio pinnata
Polydora socialis
Polydora websteri
pr ioncspio h. t e x a n a
Scolelepis squamata
Streblospio benedicti

16

27

7

1

1
17

MAGELONIDAE

Maqelona pettiboneae

POECILOCHAETIDAE

Poecilochaetus johnsoni

CHAETOPTERIDAE

Chaetopterus variopedatus

Spiochaetopterus c. oculatus

CIRRATULIDAE

Cirratulus grandis
Tharyx sp. C

OPHELIIDAE

Armandia agilis

2

6 5

CAPITELLIDAE

Capitella capitata
Dasybranchus lunulatus
Heteromastus filiformis

b

3

13

MALDANIDAE

Clymenella mucosa

181

OWENIIDAE

Boguea eniqmatica
Owenia fusiformis

PECTINARIIDAE

Cistenides qouldii

TEREBELLIDAE

Pista cristata

Terebella rubra
Thelepus setosus

2

in

781

STATION D-2 — (Continued)

Family and Species Dredge Shovel Net

SABELLIDAE

Branchiomroa niqromaculata 12 10

Sabella mlcrophthalma 1 10

SERPULIDAE

Eupomatus dianthus 1

782

STATION D-3

Sediment Type: Sand
Weight Percentages -

Date: Sept. 23

Granules:

7.4

Sands: 81.0

Silts:

10.0

Clay: 1.5

Family and Species Dredge Shovel Net

HESIONIDAE

Gyptis vittata 4

PILARGIDAE

Sigambra bassi 1

SYLLIDAE

Exoqone dispar 5 3

Syllis sp. B 1

NEREIDAE

Nereis arenaceodentata 66

Nereis £. occidentalis 46

ONUPHIDAE

Onuphis nebulosa 3

Onuphis sp. 60

EUNICIDAE

Marphysa sanquinea 10

ORBINIIDAE

Scoloplos robustus 1

Scoloplos rubra 2

PARAONIDAE

Aricidea fragilis 15

SPIONIDAE

Apoprionospio pyqmaea 2

Paraprionospio pinna ta 2
i'Oiydora socialis 3

Prionosoio h. texana 2 1

Streblospio benedicti 1

CHAETOPTERIDAE

Spiochaetopterus c. oculatus 1

Kesochaetopterus sp. A 1

CIRRATULIDAE

Tharyx sp. C 14

783

STATION D-3 — (Continued)

Family and Species Dredge Shovel Net

CAPITELLIDAE

Dasybranchus lunulatus 12

Heteromastus f iliformis 2

MALDANIDAE

Clymenella mucosa 9

Clymenella t. calida 1

SABELLIDAE

Branchiomma niqromaculata 1 10

Sabella microphthalma 25

SBRPULIDAE

Eupomatus dianthus 2

784

STATION D-4

Sediment Type: Clayey Silt Date: Sept. 23

Weight Percentages — Granules: 0.0 Sands: 6.9

Silt: 75.0 Clay: 18.1

Family and Species Dredge Shovel Net

NEREIDAE

Nereis £. occidentalis 1

CHAETOPTERIDAE

Spiochaetopterus c. oculatus 1

CIRRATULIDAE

Tharyx sp. C 1

MALDANIDAE

Clymenella mucosa 2

785

STATION D-5

Sediment Type: Sand Date: Sept. 23

Weight Percentages — Granules: 0.1 Sands: 97.2

Silts: 2.7 Clay: 0.1

Family and Species Dredge Shovel Net

PHYLLCDOCIDAE

Eteone heteropoda X

HESIONIDAE

Gyptis vittata 1

NEREIDAE

Nereis arenaceodentata 10

ONUPHIDAE

Diopatra cuprea X

PARAONIDAE

Aricidea fraqilis 3

SPIONIDAE

Paraprionospio pinna ta 28

Prionospio h. texana X0

Streblospio benedicti X0

MAGELONIDAE

Maqelona pettiboneae X

CHAETOPTERIDAE

Spiochaetopterus c. oculatus X

CIRRATULIDAE

Tharyx sp. C 2

KALDANIDAE

Clymenella mucosa 4

PECTINARIIDAE

Cistenides gouldii X0

786

STATION D-6

Sediment Type: Sand Date: Sept. 23

Weight Percentages — Granules: 0.1 Sands: 96.3

Silts: 3.0 Clay: 0.6

Family and Species Dredge Shovel Net

HESIONIDAE

Podarke obscura 1

SYLLIDAE

Syllis sp. B 2

NEREIDAE

Nereis arenaceodentata 3

Nereis £. occidentalis 1

ONUPHIDAE

Diopatra cuprea 5

Onuphis sp. 201

EUNICIDAE

Marphysa sanqinea 1

LUMBRINSRIDAE

Lumbrinerls bassi 2

ARABELLIDAE

Drilonereis cylindrica 2

Drilonereis magna 1

ORBINIIDAE

Scoloplos robustus 49

Scoloplos rubra 2

PARAOf.'IDAE

Aricidea fraqilis 33

SPIONIDAE

Paraprionospio pinnata 3

CHAETOFTERIDAE

Spiochaetopterus c. oculatus 39

CIRRATULIDAE

Cirratulus qrandis 10

Tharyx sp. C 239

787

STATION D-6 — (Continued)

Family and Species Dredge Shovel Net

CAPITELLIDAE

Dasybranchus lumbricoides 1

Dasybranchus lunulatus 1

Heteromastus f iliformis 41

NALDANIDAE

Clymenella mucosa 25

AKPHAR3TIDAE

Melinna maculata 2

SABELLIDAE

Branchiomma niqromaculata 302

STATION D-7

788

Sediment Type: Silt

Weight Percentages — Granules: 0.0

Silts: 89.4

Date: Sept. 23

Sands:
Clay:

5.5
5.1

Family and Species

Dredge Shovel Net

GLYCSRIDAE

Glycera americana

ONUPHIDAE

Onuphis sp.

SPIONIDAE

Prionospio h. texana
Streblospio benedicti

CHAETOPTERIDAE

Spiochaetopterus c. oculatus

CIRRATULIDAE

Tharyx sp. C

CAPITELLIDAE

Heteromastus f iliformis

789

STATION D-8

Sediment Type: Silty Sand Date: Sept. 25

Weight Percentages — Granules: 0.0 Sands: 60.1

Silts: 33.9 Clay: 6.0

Family and Species Dredge Shovel Net

NEREIDAE

Nereis £. occidentalis 1

Nereis succinea 2

CHAETOPTERIDAE

Chaetopterus variopedatus 1

Spiochaetopterus c. oculatus 1 1

SABELLIDAE

Branchiomma niqromaculata 10

Sabella microphthalma 1

790

STATION D-9

Sediment Type: Sand Date. Sept. 25

Weight Percentages — Granules: 0.9 Sands: 95.6

Silts: 2.8 Clay: 0.8

Family and Species Dredge Shovel Net

HESIONIDAE

Gyptis vittata 2

NEREIDAE

Nereis arenaceodentata 24

GONIADIDAE

Glycinde pacif ica 3

ONUPHIDAE

Diopatra cuprea

Onuphis sp. 2

ORBINIIDAE

Scoloplos rubra 1

PARAONIDAE

Aricidea f raqilis 45

SPIONIDAE

Apoprionospio pymaea 4

Paraprionospio pinnata 26
Polydora websteri

Streblospio benedicti 6

Pseudopolydora sp. 1

CIRRATULIDAE

Tharyx sp. C 19

CAPITELLIDAE

Capitellides jonesi 1

Dasybranchus lunulatus 4

PECTINARIIDAE

Cistenides qouldii 1

SABELLIDAE

Branchiomma nigromaculata

791

STATION D-10

Sediment Type: Sand Date: Sept. 25

Weight Percentages — Granules: 0.3 Sands: 88.2

Silts: 8.9 Clay: 2.6

Family and Species Dredge Shovel Net

HESIONIDAS

Gyptis vittata 2

ONUPHIDAE

Diopatra cuprea 1

PARAONIDAE

Aricidea fraqilis 13

SPIONIDAE

Paraprionospio pinnata 43 1

Prionospio h. texana 1

Streblospio benedicti 13

CHAETOPTERIDAE

Spiochaetopterus c. oculatus 1 1

CIRRATULIDAE

Tharyx sp. C 46

CAPITELLIDAE

Capitomastus aciculatus 16

STATION D-ll

792

Sediment Type: Sand
Weight Percentages -

Date: Sept. 25

Granules:

0.0

Sands: 92.0

Silts:

7.2

Clay: 0.8

Family and Species

Dredge Shovel Net

SIGALIONIDAE

Sthenelais boa

PHYLLODGCIDAE

Eteone heteropoda
Phyllodoce arenae

HESIONIDAE

Gyptis vittata

PILARGIDAE

Sigambra bassi
Sigambra tentaculata

NEREIDAE

Laeonerels culveri
Nereis arenaceodentata
Nereis succinea

GLYCERIDAE

Glycera americana

GONIADIDAE

Glycinde paclfica

ONUPHIDAE

Diopatra cuprea
Onuphis sp.

ARA3ELLIDAE

Drilonereis cyllndrica

ORBINIIDAE

Scoloplos rubra

PARAONIDAE

Aricidea fragilis

13
76

17

20

793

STATION D-ll — (Continued)

Family and Species Dredge Shovel Net

SPIONIDAE

Apoprionospio pygmaea 1

Paraprionospio pinnata 3

Polydora socialis 5

Prionospio cirrobranchiata 1

Prionospio h. texana n 1 8

Spiophanes bombyx 1

MAGELONIDAE

Maqelona pettiboneae 13 47

CHAETOPTERIDAE

Spiochaetopterus c. oculatus 2 13

CIRRATULIDAE

Tharyx sp. C 48

CAPITELLIDAE

Capitella capitata 3

Dasybranchus lumbricoides 1 3

Dasybranchus lunulatus 33

Heteromastus f ilif ormis 14 40

MALDANIDAE

Branchioasychis americana 2

Clymenella mucosa 12 30

PECTIN ARIIDAE

Cistenides gouldii 1 3

AMPHARETIDAE

Kelinna maculata 1

TEREBELLIDAE

Pista palmata 1

794

STATION D-12

Sediment Type: Shelly Sand

Weight Percentages — Granules: 21.4

Silts: 0.2'

Date: Sept. 25

Sands:
Clay:

78.4
0.0

Family and Species

Dredge Shovel Net

HESIONIDAE

Gyptis vittata

NEREIDAE

Nereis arenaceodentata
Nereis £. occidentalis

GONIADIDAS

Glycinde pacif ica

OR3INIIDAE

Scoloplos rubra

SPIONIDAE

Polydora socialis

CIRRATULIDAE

Tharyx sp. C

CAPITELLIDAE

Capitella capitata

6

1

12

795

STATION D-13

Sediment Type: Sand Date: Sept. 25

Weight Percentages — Granules: 0.2 Sands: 82.5

Silts: 14.5 Clay: 2.8

Family and Species Dredge Shovel Net

PHYLLCDCCIDAE

Phyllodoce arenae 1

NEREIDAE

Nereis arenaceodentata 1 3

ONUPHIDAE

Diopatra cuprea 10

PARAONIDAE

Aricidea fraqilis 2

SPIONIDAE

Apoprionospio pyqmaea 2

Paraprionospio pinnata 18 15

Polydora socialis 9

Streblospio benedicti 9 5

CHAETOPTSRIDAE

Spiochaetopterus c. oculatus 5 1

CAPITELLIDAE

Capitella capitata 3

Capitellides jonesi 2

Capitomastus aciculatus 13

SABELLARIIDAE

5abellaria gracilis 1

SABELLIDAE

Branchiomma nigromaculata 10

Keqalomma bioculatum 1

Sabella microphthalma x

796

STATION D-14

Sediment Type: Clayey Silt Date: Sept. 25

Weight Percentages — Granules: 0.0 Sands: 7.0

Silts: 66.2 Clay: 26.8

Family and Species Dredge Shovel Net

ONUPHIDAE

Diopatra cuprea 1

SPIONIDAE

Streblospio benedicti 3 1

CHAETOPTERIDAE

Spiochaetopterus c. oculatus 4

CAPITELLIDAE

Capitella capitata 1

MALDANIDAE

Clymenella mucosa 10

797

STATION D-15

Sediment Type: Clayey Silt

Weight Percentages — Granules: 0.0

Silts: 64.5

Date: Sept. 25

Sands: 5.8
Clay: 29.7

Family and Species

Dredge Shovel Net

SYLLIDAE

Exogone dispar

NEREIDAE

Nereis succinea

ONUPHIDAE

Diopatra cuprea
Onuphis sp.

ARABELLIDAE

Drilonereis magna

SPIONIDAE

Paraprionospio pinnata

CAPITELLIDAE

Capitella capitata
Capi tomastus aciculatus

MALDANIDAE

Clymenella mucosa

SABELLIDAE

Megalomma bioculatum

i
3 2

6

2 2

STATION D-16

798

Sediment Type: Clayey Silt Date: Sept. 25

Weight Percentages — Granules: 0.0 Sands: 13.8

Silts: 69.3 Clay: 16.8

Family and Species Dredge Shovel Net

CHAETOPTERIDAE

Chaetopterus variopedatus 1

Spiochaetopterus c. oculatus

CAPITELLIDAE

Capitella capitata 2

799

STATION D-17

Sediment Type: Sand Date: Sept. 25

Weight Percentages — Granules: 1.7 Sands: 93.9

Silts: 3.7 Clay: 0.7

Family and Species Dredge Shovel Net

PHYLLODOCIDAE

Eteone heteropoda 1

Eumida sanguinea • 1

Phyllodoce arenae 1 2

SYLLIDAS

Exoqone dlspar 1

NEREIDAE

Nereis arenaceodentata 2 2

Nereis Pj. occidentalis 1 12

Nereis succinea 4

GONIADIDAE

Glycinde pacif ica 2 1

ONUPHIDAE

Diopatra cuprea 1

Onuphls sp. 16

LUMBRINERIDAE

Lumbrineris coccinea 2

ARABELLIDAE

Drilonereis lonqa 1

PARAONIDAE

Aricidea fraqilis 6

SPIONIDAE

Apoprionospio pyqmaea 26 1

Paraprionospio pinnata 15 5

Polydora socialis 4 3

Prionospio h. texana 2

Streblospio benedicti 2 1

CHAETOPTERIDAE

Spiochaetopterus c. oculatus

CIRRATULIDAE

Tharyx sp. C 1

800

STATION D-17 — (Continued)

Family and Species

Dredge Shovel Net

OPHELIIDAE

Ammotrypane auloqaster

CAPITELLIDAE

Capitella capitata

MALDANIDAE

Clymenella mucosa

OWENIIDAE

Boguea eniqmatica

PECTINARIIDAE

Cistenides gouldii

SABELLIDAE

Fabricia sabella

40

1
8

6

1

10

801

STATION D-18

Sediment Type: Sand Date: Sept. 25

Weight Percentages — Granules: 3.4 Sands: 81.0

Silts: 13.4 Clay: 2.1

Family and Species Dredge Shovel Net

POLYNOIDAE

Harmothoe lunulata 1

AMPHINOMIDAE

Pseudeurythoe ambigua 5

SYLLIDAE

Autolytus cornutus 1

Exoqone dispar 44

NEREIDAE

Nereis arenaceodentata 2

Nereis £. occidentalis 64

Nereis succinea 24

DORVILLEIDAE

Dorvillea rudolphl 4

ORBINIIDAE

Naineris sp. 1

PARAONIDAE

Aricidea fragilis 10

SPIONIDAE

Polydora socialis 19

Polydora websteri 1

Prionospio h. texana 1

CAPITELLIDAE

Capitella capitata 3

Capi tellides jonesi n 6

Heteromastus f ilif ormis 1

SABELLIDAE

Branchiomma niqromaculata 124

Sabella microphthalma 2

SERPULIDAE

Eupomatus dianthus 1

802

STATION D-19

Sediment Type: - Date. Sept# 30

Weight Percentages — Granules: - Sands: -

Silts: - Clay:

Family and Species Dredge shovel Net

No Polychaetes Recorded

803

STATION D-19-A

Sediment Type: Sand Date: Sept. 30

Weight Percentages — Granules: 2.0 Sands: 92.6

Silts: 4.8 Clay: 0.6

Family and Species Dredge Shovel Net

HESIONIDAE

Gyptis vittata 1 i

Parahesione luteola 1

SYLLIDAE

Exogone dispar 1

Syllis vittata 2

NEREIDAE

Nereis p_. occidentalis 2 3

ONUPHIDAE

Diopatra cuprea 1 io

Onuphis sp. i

ORBINIIDAE

Scoloplos rubra 1

PARAONIDAE

Aricidea fraqilis 4

SPIONIDAE

Apoprionospio pyqmaea 1

Polydora socialis 1

Prionospio h. texana 4

Streblospio benedicti 1

MAGELONIDAS

Kaqelona pettiboneae 8

CIRRATULIDAE

Cirratulus qrandis „ 5

Tharyx sp. C 5

CAPITELLIDAE

Dasybranchus lumbricoides 1

Heteromastus filiformis 1

ARENICOLIDAE

Arenicola cristata 1

804

STATION D-19-A — (Continued)

Family and Species Dredge Shovel Net

MALDANIDAE

Clymenella zonalis 2

SABELLIDAE

Branchiomma nigromaculata 1

805

STATION D-19-B

Sediment Type: Sand Date: Sept. 30

Weight Percentages — Granules: 3.5 Sands: 94.3

Silts: 1.4 Clay: 0.3

Family and Species Dredge Shovel Net

SPIONIDAE

Paraprionospio pinnata 115

Streblospio benedicti 71

Pseudopolydora sp. 3

MAGELONIDAE

Maqelona pettiboneae 1

CHAETOPTERIDAE

Chaetopterus variopioatus 1 1

Spiochaetopterus c. oculatus 10

CAPITELLIDAE

Capitellides jonesi 4

OWENIIDAE

Owenia fusiformis 1

SA3ELLIDAE

Branchiomma niqromaculata 1 10

806

STATION D-20

Sediment Type: Clayey Silt Date: Oct. 1

Weight Percentages — Granules: 1.3 Sands: 5.0

Silts: 47.3 Clay: 46.5

Family and Species Dredge Shovel Net

HESIONIDAE

Parahesione luteola 1

SPIONIDAE

Paraprionospio pinnata 57 12

Streblospio benedicti 250 1

Pseudopolydora sp. 1

CHAETOPTERIDAE

Spiochaetopterus c. oculatus 1 10

CAPITELLIDAE

Capitella capitata 1

PECTINARIIDAE

Cistenides gouldii 10

807

STATION D-21

Sediment Type: Clayey Silt

Weight Percentages —

Granules:
Silts:

0.4
56.5

Date: Oct.

Sands:
Clay:

11.4
31.7

Family and Species

Dredge Shovel Net

HESIONIDAE

Gyptis vittata 1

GONIADIDAE

Glycinde pacifica 1

ONUPHIDAE

Diopatra cuprea

SPIONIDAE

Paraprionospio pinnata 19

Streblospio benedicti 254

CHAETOPTERIDAE

Spiochaetopterus c. oculatus 3

CAPITELLIDAE

Capitella capitata 1

PECTINARIIDAE

Cistenides gouldii

10

10
102

10

10

808

STATION D-22

Sediment Type: Sand Date. 0ct. x

Weight Percentages — Granules: 0.2 Sands: 88.9

Silts: 8.6 Clay: 2.3

Family and Species Dredge Shovel

Met

POLYNOIDAE

Polynoid B 1

PHYLLODOCIDAE

Phyllodoce arenae 1

Phyllodoce fraqilis 9

SYLLIDAE

Sxoqone dispar 2 1

NEREIDAE

Nereis p. occidentalis 2 18

14

Nereis succinea

NEPHTYIDAE

Aqlaophamus verrilll 1

GONIADIDAE

Clycinde pacif ica 2

ONUPHIDAE

Diopatra cuprea 2 10

EUNICIDAE

Marphysa sanquinea 1

PARAONIDAE

Aricidea fraqilis 1

SPIONIDAE

Paraprionospio pinnata 75

Polydora socialis 8

Spio setosa 1

Spiophanes bombyx 1

Streblosplo benedicti 185

Pseudo polydora sp. 4

CHAETOPTERIDAE

Chaetopterus variopedatus 1 1

Spiochaetopterus c. oculatus 2 10

STATION D-22— (Continued)

809

Family and Species

Dredge Shovel Net

CIRRATULIDAE

Tharyx sp. C

CAPITELLIDAE

Capitellides jonesi

MALDANIDAE

Clymenella zonalis
Maldane sarsi

SABELLARIIDAE

Sabellaria f loridensis

TEREBELLIDAE

Pista palmata
Terebella rubra

SABELLIDAE

Branchiomma niqromaculata
Fabricia sabella

113

1

21

10

STATION D-23

810

Sediment Type: Sand

Weight Percentages — Granules:

Silts:

Date:

Oct. 1

5.2

Sands

: 89.9

4.3

Clay:

0.7

Family and Species

Dredge Shovel Net

POLYNOIDAE

Harmothoe lunulata

CHRYSOPETALIDAE

Paleanotus heteroseta

HESIONIDAE

Gyptis vittata

PILARGIDAE

Sigambra tentaculata

SYLLIDAE

Syllis aciculata
Syllis sp. B

NEREIDAE

Nereis arenaceodentata
Nereis £. occidentalis

GLYCSRIDAE

Glycera americana

GONIADIDAE

Glycinde paciflca

ONUPHIDAE

Diopatra cuprea
Onuphis nebulosa
Onuphis sp.

EUNICIDAE

F.arphysa sanguines

LuTlBRINERIDAE

Lumbrineris bassi

12

4

248

28

10
1

ORBINIIDAE

Scoloplos robustus
Scoloplos rubra

6

12

STATION D-23— (Continued)

811

Family and Species

Dredge Shovel Net

PARAONIDAE

Aricidea fraqilis
Aricidea sp.

SPIONIDAE

Polydora socialis
Prionospio h. texana
Spiophanes bombyx

MAGELONIDAE

Maqelona pettiboneae

CHAETOPTSRIDAE

Spiochaetopterus c. oculatus

CIRRATULIDAE

Cirratulus grandis
Tharyx sp. C

CAPITELLIDAE

Dasybranchus lumbricoides
Heteromastus f ilif ormis
Notomastus latericeus

19

2

8

24

3

1
49

1
17

1

MALDANIDAE

Clymenella mucosa
Clymenella zonalis

OWENIIDAE

Owenia fusiformis

2 5
5

SABELLARIIDAE

Sabellaria gracilis

PECTINARIIDAE

Cistenides gouldii

AMPHARETIDAE

Melinna maculata

TEREBELLIDAE

Pista cristata
Thelepus setosus

SABELLIDAE

Branchiomma niqromaculata

10

812

STATION D-24

Sediment Type: Clayey Silt Date: Oct. 1

Weight Percentages — Granules: 0.2 Sands: 4.0

Silts: 70.2 Clay: 25.6

Family and Species Dredge Shovel Net

PHYLLODOCIDAE

Eumida sanquinea 1

Phyllodoce arenae 1

Phyllodoce f raqilis 1

NEREIDAE

Nereis arenaceodentata 9

GONIADIDAE

Glycinde pacif ica 6

ONUPHIDAE

Onuphis nebulosa 1

ORBINIIDAE

Scoloplos robustus 2

SPIONIDAE

Apoprionospio pyqmaea 2

Paraprionospio pinnata 2

Folydora socialis 4

Streblospio benedicti 3

POECILOCHAETIDAE

Poecilochaetus johnsoni 1

CHAETOPTERIDAE

Chaetopterus variopedatus 1

MALDANIDAE

Clymenella mucosa 2

OWENIIDAE

Boguea eniqmatica 6

SABELLIDAE

Branchiomma niqromaculata 1

SSRPULIDAE

Eupomatus dianthus 1

813

STATION D-25

Sediment Type: Sand Date: Oct. 15

Weight Percentages — Granules: 0.6 Sands: 94.8

Silts: 3.8 Clay: 0.9

Family and Species Dredge Shovel

POLYNCIDAE

Lepidasthenia commensalis

SIGALIONIDAE

Sthenelais boa

Net

Lepidonotus variabilis 4

Phyllohartmania taylori 1

i

PHYLLODOCIDAE

Euraida sanquinea j

Phyllodoce arenae 3

Phyllodoce fraqilis 1

HESIONIDAE

Hesione picta i

SYLLIDAE

Autolytus cornutus 4

Exogone dispar g ^l

Syllis annularis
Syllis sp. B 5

NEREIDAE

Nereis arenaceodentata 7

Nereis £. occidentalis 36 22

Nereis succinea r. 2.

Platynereis dumerilii 3 42

Rullierinereis mexicana 2

GLYCERIDAE

Glycera americana 3 3

GONIADIDAS

Glycinde pacifica 3

ONUPHIDAE

Diopatra cuprea 25 I

Onuphis magna 1

Onuphis nebulosa 6

Onuphis sp. 86 ,

STATION D-25 — (Continued)

814

Family and Species

Dredge Shovel Net

EUNICIDAE

Eunice rubra
Karphvsa sanquinea
Nerr.atonereis hebes

LOMBRINERIDAE

Lumbrineris bassi
Lumbrineris erecta

ORBINIIDAE

Naineris setosa
Scoloplos robustus
Scoloplos rubra

PARAONIDAE

Aricidea fraqilis

SPIONIDAE

Apoprionospio pyqmaea
Paraprionospio pinnata
Folydora socialis
Polydora websteri
Prionospio cirrobranchiata
Frionospio h. texana
Spio setosa
Spiophanes bombyx
Pseudopolydora sp.

KAGELONIDAE

Maqelona pettiboneae

CHAETOPTERIDAE

Spiochaetopterus c. oculatus
Mesochaetopterus sp. A

CIRRATULIDAE

Cirratulus grandis
Cirrif ormia f iliqera
Dodecaceria concharum
Tharyx sp. C

OPHELIIDAE

Ammotrypane auloqaster

1?

6
1

12

815

STATION D-25— (Continued)

Family and Species Dredge Shovel Net

CAPITELLIDAE

Capitella capitata 1

Capitellides jonesi 1

Heteromastus f iliformis 7 1

KALDANIDAE

Branchioasychis americana 1

Clymenella mucosa 8

OWENIIDAE

Owenia f usif ormis 10

SABELLARIIDAE

Sabellaria f loridensis 1

Sabellaria gracilis 1 1

PECTINARIIDAE

Cistenides qouldii 3 1

AKPHARETIDAE

Isolda puichella 1 1

Melinna maculata 1 2

TEREBELLIDAE

Loimia medusa 3

Pista cristata 7 1

Pista palmata 1 12

The le pus setosus 4 2

SABELLIDAE

Branchiomma niqromaculata 130 4

Chone duneri 1

Fabricia sabella 1

Meqalomma bioculatum 1

Sabella microphthalma 2

816

STATION D-26

Sediment Type: - Date: Oct. 16

Weight Percentages — Granules: - Sands:

Silts: - Clay:

Family and Species Dredge Shovel Net

PHYLLODOCIDAE

Phyllodoce fragilis 107

SYLLIDAE

Syllis varieqata 4

Syllis vittata • 6

NEREID\E

Nereis p_. occidentalis 10

Nereis succinea 1

ORBINIIDAE

Naineris sp. 30

SPIONIDAE

Polydora socialis 31

Prionospio h. texana 1

CIRRATULIDAE

Cirriformia filiqera 18

SABELLIDAE

Branchiomma niqromaculata 13

Sabella microphthalma 1

817

STATION D-2 7

Sediment Type: Sand

Weight Percentages — Granules: 0.6

Silts: 0.0

Date: Oct. 22

Sands: 99.4
Clay: 0.0

Family and Species

Dredge Shovel Net

ONOPHIDAE

Onuphis magna
Onuphis sp.

ORBINIIDAE

Orbinia ornata
Scoloplos robustus

CIRRVTULIDAE

Cirriformia f iligera

OPHELIIDAE

Travisia sp.

MALDANIDAE

Clymenella mucosa

818

STATION D-28

Sediment Type: Sand Date: Oct. 23

Weight Percentages — Granules: 0.1 Sands: 99.5

Silts: 0.3 Clay: 0.1

Family and Species Dredge Shovel Net

NEREIDAE

Laeonereis culveri 1

PARAONIDAE

Aricidea fragilis 1

SPIONIDAE

Scolelepis squamata 1

MAGELONIDAE

Maqelona pettiboneae 24

CIRRATULIDAE

Cirratulus qrandis 1

OPHELIIDAE

Travisia sp. 1

CAPITELLIDAE

Heteromastus f ilif ormis » 9

ARENICOLIDAE

Arenicola cristata 14

MALDANIDAE

Clymenella mucosa 4

819

STATION E-l

Sediment Type: Sand Date: Dec. 10

Weight Percentages — Granules: 0.1 Sands: 96.2

Silts: 2.6 Clay: 1.2

Family and Species Dredge Shovel Net

POLYNOIDAE

Lepidasthenia commensalis 1

SIGALIONIDAE

Sthenelais boa 1

PHYLLODOCIDAE

Eteone heteropoda 1

Eumida sanguinea 1

Phyllodoce arenae 4 3

HESIONIDAE

Gyptis vittata 1

SYLLIDAE

Syllis gracilis 1

Syllis spongicola 1

NEREIDAE

Nereis succinea 74 387

NEPHTYIDAE

Nephtys picta 1

GLYCERIDAE

Glycera americana 1

GONIADIDAE

Glycinde pacif ica 18 10

ONUPHIDAE

Diopatra cuprea 7 10

Onuphis sp. 10

EUNIC1DAE

Marphysa sanquinea 2

DORVILLEIDAE

Dorvillea rudolphi 1

STATION E-l — (Continued)

820

Family and Species

Dredge Shovel Net

ORBINIIDAE

Scoloplos robustus
Scoloplos rubra

SPIONIDAE

Paraprionospio pinnata
Polydora socialis
Polydora websteri

27
5

CIRRATULIDAS

Cirratulus sp. D
Tharyx sp. C

FLABELLIGERIDAE

Pherusa arenosa

CAPITELLIDAE

Heteromastus f iliformis

12

MALDANIDAE

Branchioasychis americana
Clymenella mucosa

PECTINARIIDAE

Cistenides gouldii

TEREBELLIDAE

Pista cristata
Terebella rubra

SABELLIDAE

Hegalomma bioculatum

821

STATION E-2

Sediment Type: Sand

Weight Percentages — Granules: 0.1

Silts: 2.4

Date: Dec. 10

Sands: 96.5
Clay: 1.0

Family and Species

Dredge shovel Net

PHYLLODOCIDAE

Phyllodoce arenae

HESIONIDAE

Gyptis vittata

NEREIDAE

Nereis succinea

GLYCERIDAE

Glycera americana

GONIADIDAE

Glycinde pacifica

ONUPHIDAE

Diopatra cuprea
Onuphis sp.

ARABELLIDAE

Drilonereis cylindrica
Drilonereis magna

DORVILLEIDAE

Dorvillea rudolphi

ORBINIIDAE

Scoloplos rubra

PARAONIDAE

Aricidea fraqilis
Aricidea taylori

Aricidea s p .

SPIONIDAE

Paraprionospio pinnata
Polydora socialis
Scolelepis squamata
Streblospio benedicti

6
3
44
1
8

14

10

1

6

25

STATION E-2 — (Continued)

822

Family and Species

Dredge Shovel Net

CHAETOPTERIDAE

Spiochaetopterus c. oculatus

CIRRATULIDAE

Tharyx sp. C

CAPITELLIDAE

Capitella capitata
Heteromastus f ilif ormis
Notomastus latericeus

38

14
1
1

MALDANIDAE

Branchiosaychis americana
Clymenella mucosa
Kaldane sarsi

AMPHARETIDAE

Helinna maculata

TERE3ELLIDAE

Pista palmata

STATION E-3

823

Sediment Type: Sand
Weight Percentages -

Granules :
Silts:

0.2
9.3

Date: Dec. 10

Sands:
Clay:

87.5
3.0

Family and Species

Dredge Shovel Net

POLYNOIDAE

Polynoid B

PHYLLODOCIDAE

Eumida sanqulnea
Phyllodoce arenae

HESIONIDAE

Gyptls vittata

NEREIDAE

Nereis succinea

GLYCERIDAE

Glycera americana

GONIADIDAE

Glycinde pacif ica

DORVILLEIDAE

Dorvillea rudolphi

ORBINIIDAE

Scoloplos rubra

SPIONIDAE

Paraprionospio pinnata
Polydora socialis
Prionospio cirrobranchiata

CHAETCPTERIDAE

Spiochaetopterus c. oculatus

CAPITELLIDAE

Heteromastus f ilif ormis

MALDANIDAE

Branchioasychis americana
Clymenella mucosa
Kaldane sarsi

6

2

23

1

28

218

19

30

5

48

1

5 0

151
2
5

42
2

3

824

STATION E-3 — (Continued)

Family and Species

Dredge Shovel Net

PECTINARIIDAE

Cistenides gouldii

SABELLIDAE

Keqalomma bioculatum

2
12

825

STATION E-4
Sediment Type: Sand
'//eight Percentages — Granules: 0.

Silts:

0.3

Date: Dec. 10

Sands :
Clay:

98.8
0.1

Family and Species

Dredge Shovel Net

SIGALIONIDAE

Sthenelais boa

PHYLLODOCIDAE

Eumida sanquinea
Phyllodoce arenae

HESIONIDAE

Gyptis vittata

NEREIDAE

Nereis arenaceodentata
Nereis succinea

NEPHTYIDAE

Aglaophamus verrilli

GLYCERIDAE

Glycera americana

GONIADIDAE

Glycinde pacif ica

ONUPHIDAE

Onuphis sp.

EUNICIDAE

Marphysa sanquinea

LUMBRINERIDAE

Lumbrineris coccinea

ORBINIIDAE

Scoloplos rubra

SPIONIDAE

.Apoprionospio pyqmaea
Paraprionospio pinnata
Polydora socialis
Scolelepls squamata

15

35

24
33

STATION E-4 — (Continued)

826

Family and Species

Dredge Shovel Net

CHAETOPTERIDAE

Spiochaetopterus c_. oculatus

CIRRATULIDAE

Cirratulus qrandis

OPHELIIDAE

Travisia sp.

MALDANIDAE

Branchioasychis americana

Clymenella mucosa

OWENIIDAE

Boquea eniqmatica
Owenia fusiformis

TEREBELLIDAE

Polycirrus eximius

SABELLIDAE

Meqalomma bioculatum

2

30

STATION E-5

827

Sediment Type: Sand

Weight Percentages — Granules: 0.3

Silts: 0.5

Date: Dec. 10

Sands :
Clay:

99.1
0.1

Family and Species

Dredge Shovel Net

POLYNCIDAE

Harmothoe lunulata
Polynoid B

SIGALIONIDAE

Sthenelais boa

PHYLLODOCIDAE

Steone Heteropoda
Phyllodoce arenae

HESIONIDAE

Podarke obscura

SYLLIDAE

Exoqone dispar

NEREIDAE

Nereis succinea

NEPHTYIDAE

Aglaophamus verrilli

GLYCERIDAE

Glycera americana

GONIADIDAE

Glycinde pacif ica

ONUPHIDAE

Onuphis sp.

LUMBRINERIDAE

Lumbrineris latreilli

ARABELLIDAE

Drilonereis cylindrica

ORBINIIDAE

Scoloplos robustus

11
1
6
4
4
1

16

STATION E-5 — (Continued)

828

Family and Species

Dredge Shovel Net

SPIONIDAE

Apoprionospio pygmaea
Paraprionospio pinnata
Polydora socialis
Scolelepis squamata
Spiophanes bombyx

CHAETCPTSRIDAE

Spiochaetopterus c. oculatus

CIRRATULIDAE

Cirriformia f iliqera

OPHELIIDAE

Travisia sp.

KALDANIDAE

Clymenella mucosa

OWENIIDAE

Boquea eniqmatica
Owenia fusif ormis

AMPHARETIDAE

Isolda pulchella

SABELLIDAE

Fabricia sabella
Sabella microphthalma

9

4
1
1
3

27
16

3
2

1

STATION E-6

829

Sediment Type: Sand

Weight Percentages — Granules: 0.4

Silts: 0.9

Date: Dec. 10

Sands: 98.2
Clay: 0.5

Family and Species

Dredge Shovel Net

PHYLLODOCIBAS

Phyllodoce arenae
Phyllodoce f ragilis

HESIONIDAE

Gyptis vittata
Gyptis sp.

PILARGIDAE

Cabira incerta

SYLLIDAE

Syllis aciculata
Syllis vittata

NEREIDAE

Laeonereis culveri
Nereis arenaceodentata
Nereis succinea

9
3

3e

26

4

P.P.

GLYCERIDAE

Glycera americana

GONIADIDAE

Glycinde pacif ica

ONUPHIDAE

Diopatra cuprea
Onuphis sp.

EUNICIDAE

Karphysa sanquinea

ARABELLIDAE

Arabella iricolor
Drilonereis magna

ORBINIIDAE

Scoloplos robustus
Scoloplos rubra
Naineris sp.

1
18

58

830

STATION E-6— (Continued)

Family and Species

Dredges Shovel Net

PARAONIDAE

Aricidea fraqilis
Aricidea sp.

SPIONIDAE

Polydora soclalis
Prionospio h. texana
Scolelepis squamata

MAGELONIDAE

Magelona pettiboneae

CIRRATULIDAE

Cirratulus grandis
Cirrif ormia f iliqera
Tharyx sp. C

CAPITSLLIDAE

Heteromastus filif ormis

Notomastus hemlpodus

MALDANIDAE

Clymenella mucosa

PECTIMARIIDAE

Cistenides gouldii

AMPHAETIDAE

Isolda pulchella

Kelinna maculata

TERSBSLLIDAE

Thelepus setosus

SABELLIDAE

Fabricia sabella
Sabella micro phthalma

44

1
7

29

17

]

26

41

831

STATION E-7

Sediment Type: Sand

Weight Percentages — Granules: 0.1

Silts:

4.5

Date: Dec. 10

Sands:
Clay:

92.3
3.2

Family and Species

Dredge Shovel Net

AMPHINOKIDAE

P seudeury thoe ambiqua

PHYLLODOCIDAE

Steone heteropoda
Phyllodoce arenae

HESIONIDAE

Podarke obscura

NEREIDAE

Nereis succinea

GONIADIDAE

Glycinde pacif ica

ONUPHIDAE

Diopatra cuprea
Onuphis sp.

ORBINIIDAE

Scoloplos rubra

SPIONIDAE

Paraprionospio pinnata
Polydora socialis

CHAETOPTSRIDAE

Spiochaetopterus c. oculatus

CIRRATULIDAE

Tharyx sp. C

FLABELLIGERIDAE

Pherusa arenosa

MALDANIDAE

Branchioasychis americana
Kaldane sarsi

PECTINARIIDAE

Cistenides qouldli

6
72

39

27
1

o 3
1

17

104
4

10

832

STATION E-7 — (Continued)

Family and Species Dredge Shovel Net

TEREBELLIDAE

Polycirrus eximius 1

SABELLIDAE

Neqalomma bioculatum 13

833

STATION E-8

Sediment Type: Sand
Weight Percentages —

Date:

Dec. 10

Granules :

2.4

Sands

: 96.9

Silts:

0.6

Clay:

0.1

Family and Species Dredge Shovel Net

SIGALIONIDAE

Sthenelais boa 1

CHRYSOFETALIDAE

Paleanotus heteroseta 1

PHYLLODOCIDAE

Eumida sanquinea 3

Phyllodoce arenae 3 3

HESIONIDAE

Podarke obscura 1

SYLLIDAE

Exoqone dispar 195 5

Syllis aciculata 1

Syllis sp. A 10

NERE1DAE

Nereis succinea 4

Platynereis dumerilii 2

GONIADIDAE

Goniadella sp. 1

ONUPHIDAE

Diopatra cuprea 3

Onuphis nebulosa 716

ORBINIIDAE

Scoloplos robustus 1

SPIONIDAE

Faraprionospio pinnata 1

Frionospio h. texana 1

Spio setosa 2

CHAETOPTERIDAE

Spiochaetopterus c. oculatus 1

834
STATION E-8 — (Continued)

Family and Species Dredge Shovel Net

OPHELIIDAE

Armandia aqilis 1

Travisia sp. 51

CAPITELLIDAE

Heteromastus f iliformis 3

MALDANIDAE

Branchioasychis americana 1

Clymenella mucosa 66 3

OWENIIDAE

Owenia fusiformis 5

AMPHARSTIDAE

Isolda pulchella 2

TEREBELLIDAE

Polycirrus eximius 3

835

STATION BC-A
Sediment Type: Sand

Weight Percentages — Granules: 1.8

Silts: 12.2

Date: Nov. 14

Sands:
Clay:

78.8
7.2

Family and Species

POLYNCIDAE

Lepidonotus sublevis
Polynoid B

SIGALIONIDAE

Sthenelais boa

PHYLLODOCIDAE

Eteone heteropoda
Phyllodoce arenae
Phyllodoce fraqilis

HESIONIDAE

Gypis vittata

PILARGIDAE

Ancistrosyllis jonesi

SYLLIDAE

Sxoqone dispar

NEREIDAE

Nereis £. occidentalis
Nereis succinea

NEPHTYIDAE

Aglaophamus verrilli

GLYCERIDAE

Glycera americana

GONIADIDAE

Glycinde pacif ica

ONUPHIDAE

Diopatra cuprea
Onuphis nebulosa
Onuphis sp.

Dredge Shovel Net

2

25
1

If,

8

15

37

9
12

4

1
2 5

6

28

10

836

STATION BC-A — (Continued)

Family and Species Dredge Shovel Net

ORBINIIDAE

Scoloplos robustus 2

Scoloplos rubra 3

PARAONIDAE

Aricidea fragilis 6

SPIONIDAE

Faraprionospio pinnata 55 5

Folydora socialis 1

Streblospio benedicti 20 2

CHAETOPTERIDAE

Chaetopterus variopedatus 1

Spiochaetopterus c. oculatus 17

CIRRATULIDAE

Cirratulus qrandis 4

Tharyx sp. C 126

CAPITSLLIDAE

Capitellides jonesi 1

Heteromastus f ilif ormls 2

Scyphoproctus platyproctus 1

MALDAN1DAE

Clymenella mucosa 13

OWENIIDAE

Owenia fusuf ormis 4

SABELLARIIDAE

Sabellaria f loridensis 5

Sabellaria gracilis 1

PSCTINARIIDAE

Cistenides gouldii 3 10

AMPHARETIDAE

Isolda pulchella 1

TEREBELLIDAE

Pista cristata 1

Pista palmata 3 1

837

STATION BC-A — (Continued)

Family and Species Dredge Shovel Net

SA3ELLIDAE

Branchiomma nigromaculata 6 3

Neqalomma bioculatum 3

Sabella microphthalma 1

STATION BC-A-1

838

Sediment Type: Sand

Weight Percentages — Granules:

Silts:

Date:

Nov. 14

2.2

Sands

: 92.6

4.2

Clay:

1.0

Family and Species

Dredge Shovel Net

NEPHTYIDAE

Aqlaophamus verrilli

ONUPHIDAE

Diopatra cuprea
Onuphis nebulosa
Onuphis sp.

SPIONIDAE

Paraprionospio pinnata

■■oivdora socialis

CAPITELLIDAE

Dasybranchus lunulatus

MALDANIDAS

Clymenella mucosa

OWE Nil DAE

Owenia f usif ormis

SABELLARIIDAE

Sabellaria f loridensis
Sabellaria gracilis

PECTINARIIDAE

Cistenides qouldii

20

10
1

839

STATION BC-C

Sediment Type: Sand Date: Nov. 18

Weight Percentages — Granules: 1.0 Sands: 96.5

Silts: 1.9 Clay: 0.6

Family and Species Dredge Shovel Net

HESIONIDAE

Gyptis vittata 2

NEREIDAE

Nereis arenaceodentata 4

Nereis £. occidentalis 46

GONIADIDAE

Glycinde pacif ica 1

ONUPHIDAE

Diopatra cuprea 10

Onuphis magna 11

Onuphis sp. 26

EUNICIDAE

Narphysa sanquinea 10

PARAONIDAE

Aricidea fraqilis 2

SPIONIDAE

Paraprionospio pinnata 3

h olydora socialis 1 5

MAGELONIDAE

Maqelona pettiboneae 1

CIRRATULIDAE

Cirratulus qrandis 10

Tharyx sp. C 1

CAPITELLIDAE

Dasybranchus lunulatus 2

Heteromastus f ilif ormis 4

MALDANIDAE

Clymenella mucosa 4

840
STATION BC-C— (Continued)

Family and Species Dredge Shovel Net

TEREBELLIDAE

Loimia medusa 1

SABELLIDAE

Branchiomma niqromaculata 13

STATION BC-E

841

Sediment Type: Sand

Weight Percentages — Granules: 0.1

Silts: 0.1

Date: Nov. 18

Sands:
Clay:

99.8
0.0

Family and Species

Dredge Shovel Net

SIGALIONIDAE

Sthenelais boa

PHYLLODOCIDAE

Eteone heteropoda

NEREIDAE

Nereis succinea

NEPHTYIDAE

Aqlaophamus verrilli

GLYCERIDAE

Glycera americana

GONIADIDAE

Glycinde pacif ica

ONUPHIDAE

Diopatra cuprea
Cnuphis nebulosa
Onuphis sp.

LUMBRINERIDAE

Lumbrineris sp.

GR3TNIIDAE

Scoloplos rubustus

SPIONIDAE

Apoprionospio pyqmaea
Paraprionospio pinnata

CHAETOPTERIDAE

Chaetopterus variopedatus
Spiochaetopterus c. oculatus

C1RRATULIDAE

Cirratulus qrandis

13
1

842

STATION BC-E — (Continued)

Family and Species Dredge Shovel Net

OPHELIIDAE

Ammotrypane aulogaster 2

Travisia sp. 12

KALDANIDAE

Branchioasychis americana 1

OWENIIDAE

Owenia fusif ormis 6

AMPHARETIDAE

Isolda pulchella 1

SA3ELLIDAE

3ranchiomma niqromaculata 3

843

STATION BC-G

Sediment Type: Sand
Weight Percentages —

Granules:
Silts:

2.0
2.4

Date: Nov. 14

Sands:
Clay:

95.0
0.6

Family and Species

Dredge Shovel Net

HESIONIDAE

Gyptis vittata

NEREIDAE

Nereis arenaceodentata
Nereis p_. occidentalis
Nereis succinea

GLYCERIDAE

Glycera americana

ONUPHIDAE

Diopatra cuprea
Onuphis sp.

DORVILLEIDAE

Dorvillea rudolphi

ORBINIIDAE

Scoloplos rubustus
Scoloplos rubra

PARAONIDAE

Aricidea fraqilis

SPIONIDAE

Polydora socialis

CHAETOPTERIDAE

Spiochaetopterus c. oculatus

CIRRATULIDAE

Cirratulus qrandis

CAPITELLIDAE

Dasybranchus lunulatus
Heteromastus f ilif ormis

KALDANIDAE

Clymenella mucosa

844

STATION BC-G — (Continued)

Family and Species Dredge Shovel Net

AMPHARETIDAE

Melinna maculata 5

SABELLIDAE

Branchiomma niqromaculata 93

845

STATION BC-H

Sediment Type: Clayey Silt Date: Nov. 14

Weight Percentages — Granules: 0.6 Sands: 11.2

Silts: 44.4 Clay: 43.8

Family and Species Dredge Shovel Net

POLYNOIDAE

Polynoid B 3

SIGALIONIDAE

Sthenelais boa 1

PILARGIDAE

Ancistrosyllis jonesi 1

GLYCSRIDAE

Glycera americana 8

GONIADIDAE

Glycinde pacifica 4

ONUPHIDAE

Diopatra cuprea 2

PARAONIDAE

Aricidea fraqilis 1

SPIONIDAE

Paraprionospio pinnata 9

Polydora socialis 1

Streblospio benedict! 9

CHAETOPTERIDAE

Spiochaetopterus c. oculatus 1

CIRRATULIDAE

Tharyx sp. C 1

OPHEL1IDAE

Ammotrypane auloqaster 1

MALDANIDAE

Branchioasychis americana 1

PECTINARIIDAE

Clstenides gouldii 1

846

STATION BC-H — (Continued)

Family and Species Dredge Shovel Net

TEREBELLIDAE

Loimia medusa 1

SABELLIDAE

Branchiomma niqromaculata 1 10

Meqalomma bioculatum 1

847

STATION BC-I

Sediment Type: Sand Date: Nov. 14

Weight Percentages — Granules: 0.7 Sands: 86.7

Silts: 7.9 Clay: 4.8

Family and Species Dredge Shovel Net

POLYNOIDAE

Polynoid B 1

SIGALIONIDAE

Sthenelais boa 1

AMPHINOKIDAE

Pseudeurythoe ambiqua 1

PHYLLODOCIDAE

Eumida sanquinea 2

Faranaltes specTosa 1

HESIONIDAE

Gyptis vittata 1

NERSIDAS

Nereis arenaceodentata 1

Nereis p. occldentalis 3 2

Nereis succinea 28 10

GLYCERIDAE

Glycera americana 1 1

GONIADIDAE

Glycinde pacif ica 7

ONUPHIDAE

Diopatra cuprea 1 1

Onuphis sp. 1

PARAONIDAE

Aricidea fraqilis 2

SPIONIDAE

Paraprionospio pinnata 32

Polydora websteri 1

Streblospio benedicti 1

CHAETOPTERIDAE

Chaetopterus variopedatus 3

848

STATION BC-I — (Continued)

Family and Species Dredge Shovel Net

CIRRATULIDAE

Cirratulus grandis 1

Tharyx sp. C 2

OPHELIIDAE

Ammotrypane auloqaster 1

CAPITELLIDAE

Notomastus latericeus 1

MALDANIDAE

Branchioasychis americana 2

Clymenella mucosa 2

Maldane sarsi 2

SABELLARIIDAE

Sabellaria f loridensis 1

PECTINARIIDAE

Cistenides qouldii 1

TEREBELLIDAE

Pista palmata 1

SABELLIDAE

Branchiomma niqromaculata 6 3

Hegalomma bioculatum 4

Sabella microphthalma 1

STATION BC-M

849

Sediment Type: Sand

Weight Percentages — Granules: 0.1

Silts: 3.5

Date: Nov. 18

Sands :
Clay:

95.2

1.3

Family and Species

Dredge Shovel Net

SIGALIONIDAE

Sthenelais boa

PHYLLODOCIDAE

Eumida sanquinea
Paranaites speciosa
Phyllodoce arenae
Phyllodoce fraqilis

HESIOMIDAE

Podarke obscura

SYLLIDAE

Autolytus cornutus
Sxogone dispar
Syllis annularis
Syllis varieqata

NEREIDAE

Nereis arenaceodentata
Nereis p_. occidentalis
Nereis succinea
Platynereis dumerilii

GLYCSRIDAE

Glycera americana

GONIADIDAE

Glycinde pacif ica

ONUPHIDAE

Diopatra cuprea
Onuphis sp.

EUNICIDAE

Marphysa sanquinea

ARABELLIDAE

Arabella iricolor

14

12
6

23

13

2

1

11

10
31

10

62
3

10

82

6

2

850

STATION BC-M — (Continued)

Family and Species

Dredge Shovel Net

DORVILLf:iDAE

Dorvillea rudolphi

ORBINIIDAE

Scoloplos robustus 27

Scoloplos rubra 22

PARAONIDAE

Aricidea f raqilis 4

SPIONIDAE

Apoprionospio pygmaea

Paraprionospio pinnata 66

rolydora socialis 1

Polydora websteri
Scolelepis squamata

CHAETOPTERIDAE

Spiochaetopterus c. oculatus 2

CIRRATULIDAE

Cirratulus qrandis 25

OPHELIIDAE

Ammotrypane auloqaster 2

Travisia sp.

CAPITSLLIDAS

Capitella capitata

Capitellides jonesi

Dasybranchus lunulatus

Heterorr.astus filiformis 1

1
10

11

14

1

MALDANIDAE

Branchioasychis americana
Clymenella mucosa

SABELLARIIDAE

Sabellaria f loridensis
Sabellaria gracilis

PECTIN ARIIDAE

Clstenides gouldii

19
9

11

851
STATION BC-M— (Continued)

Family and Species Dredge Shovel Net

AMFHARETIDAE

Melinna maculata 10

TEREBELLIDAE

Loimia medusa 1

Thelepus setosus 2

SABELLIDAE

Branchiomma niqromaculata 7 1

Fabricia sabella 1

Megalomma bioculatum 1

Sabella microphthalma 32 37

852

STATION BC-M-1

Sediment Type: Sand Date: Nov. 18

Weight Percentages — Granules: 0.6 Sands: 91.2

Silts: 5.8 » Clay: 2.4

Family and Species Dredge Shovel Net

POLYNOIDAE

Lepidonotus sublevis 1

SYLLIDAE

Syllis aciculata 1

CHAETOPTERIDAE

Spiochaetopterus c. oculatus 1

CIRRATULIDAE

Cirratulus grandis 16

MALDANIDAE

Clymenella mucosa 1

SABELLIDAE

Branchiomma niqromaculata 3

STATION BC-N

85 3

Sediment Type: Sand
Weight Percentages —

Granules:
Silts:

14.7
1.5

Date: Nov. 18

Sands:
Clay:

33.5
0.3

Family and Species

Dredge Shovel Net

POLYNOIDAE

Lepidonotus sublevis
Lepidonotus variabilis
Polynoid A

SIGALIONIDAE

Sthenelais boa

7
1

40

CHRYSOPETALIDAE

Paleanotus heteroseta

PHYLLODOCIDAE

Steone heteroooda
Sumida sanquinea
r'hyllodoce arenae
Phyllodoce fraqills

HESIONIDAE

Gyptis vittata
Podarke obscura

SYLLIDAE

Autolytus cornutus
Zxogone dispar
Syllis annularis
Syllis sponqicola
Syllis varieqata
Pionosyllis sp.
Syllis sp. A
Syllis sp. B

NEREIDAE

Nereis arenaceodentata
Nereis £. occidentalis
Nereis succinea
Platynereis dumerilii

NEPHTYIDAE

Nephtys bucera
Nephtys maqellanica

1

108

27

34

193

36
2
1

1C

14

123

268

1

5
10

2 2
39

854

STATION BC-N — (Continued)

Family and Species Dredge Shovel Net

GLYCERIDAE

Glycera amerlcana 29

GONIADIDAE

Glycinde pacif ica 4

Goniadella sp. 9

ONUPHIDAE

Diopatra cuprea 27 1

Onuphis magna 4

Onuphis nebulosa 70

Onuphis sp. 100

LUMBRINSRIDAE

Lumbrineris coccinea 2

Lumbrineris erecta 1

ARABELLIDAE

Arabella iricolor 5

DORVILLEIDAE

Dorvillea rudolphi 8

ORBINIIDAE

Scoloplos rubustus 2

Scoloplos rubra 1

SPIONIDAE

Apoprionospio pyqmaea 1

Paraprionospio pinnata 1

Polydora socialis 64 6

Polydora websteri 1 1

Prionospio cirrobranchiata 1

MAGELONIDAE

Magelona pettiboneae 2

POECILOCHAETIDAE

Poecilochaetus johnsoni 1

TROCHOCHAETIDAE

Trochochaeta sp. 1

855

STATION BC-N — (Continued)

Family and Species

Dredge Shovel Net

CHAETOPTERIDAE

Chaetopterus variopedatus 1

Spiochaetopterus c. oculatus 3

Kesochaetopterus sp. B 10

Kesochaetopterus sp. C 1

CIRRATULIDAE

Cirratulus grandis 2

Cirriformia filiqera 2

Tharyx sp. B i

Tharyx sp. C 1

OPHELIIDAE

Ammotrypane auloqaster 12

Armandia aqilis 1

Travisia sp.

CAPITELLIDAE

Heteromastus filiformis 2

KALDANIDAE

Clymenella mucosa 95

OWENIIDAE

Owenia fusiformis 3

SABELLARIIDAE

Sabellaria f loridensis 12

Sabellaria gracilis 5

PECTINARIIDAE

Cistenides qouldii 1

APHARETIDAE

Isolda pulchella 14

Kelinna maculata 1

Sabellides oculata 1

TEREBELLIDAE

Loimia medusa 3

Pista palmata 16

Terebella rubra
Thelepus setosus

856

STATION BC-N — (Continued)

Family and Species Dredge Shovel Net

SABELLIDAE

Branchiomma nigromaculata 1 10

Chone duneri 6

Fabricia sabella 156 1

Keqalomma lobif erum 1

Sabella microphthalma

857

STATION PB-1

Sediment Type: Sand

Weight Percentages — Granules: 0.3

Silts: 0.5

Date: Nov. 13

Sands:
Clay:

99.0
0.2

Family and Species

Dredge Shovel Net

POLYNOIDAE

Lepidonotus variabilis

SIGALIONIDAE

Sthenelals boa

CHRYSOP STALIDAE

Paleanotus heteroseta

PHYLLODOCIDAE

Eteone heteropoda
Eumida sanguinea
Phyllodoce arenae
Phyllodoce fragilis

PILARGIDAE

Cabira incerta

25

10
1

SYLLIDAE

Autolytus cornutus
Sxogone dispar

NEREIDAE

Laeonereis culveri
Nereis arenaceodentata
Nereis £. occidentalis
Nereis succinea

NEPHTYIDAE

Aqlaophamus verrilli

GLYCERIDAE

Glycera americana

GONIADIDAE

G lycinde pacif ica

ONUPHIDAE

Diopatra cuprea
Onuphis nebulosa
Onuphis sp.

26

14

58

1
25
12

34

STATION PB-1 — (Continued)

858

Family and Species

Dredge Shovel Net

EUNICIDAE

Marphysa sanquinea

ARABELLIDAE

Drilonereis cylindrica

0RB1NIIDAE

Scoloplos robustus
Scoloplos rubra
Naineris sp.

PARAONIDAE

Aricidea fraqilis

SPIONIDAE

Paraprionospio pinnata
Folydora socialis
Polydora websteri

i r ionospio h. texana
Spiophanes bombyx
Streblospio benedicti

MAGELONIDAE

Maqelona pettiboneae

POECILOCHASTIDAE

Poecilochaetus iohnsoni

CHAETOPTERIDAE

Spiochaetopterus c. oculatus

CIRRATULIDAE

Tharyx sp. C

OPHELIIDAE

Ammotrypane aulogaster

CAPITELLIDAE

Capitella capitata
Capitellides jonesi
Heteromastus filiformis

110

1

140

2

12
26

29

50
3
1

MALDANIDAE

Clymenella mucosa

13

100t

STATION PB-1 — (Continued)

859

Family and Species

Dredge Shovel

Net

OWENIIDAE

3oquea enigmatica

SABELLARIIDAE

Sabellaria f loridensis

Sab-jllaria gracilis

PECTINARIIDAE

Cistenides gouldii

AMPHARETIDAE

Sabellides oculata

10

4

10

TEREBELLIDAE

Loimia medusa
Pista cristata
Pista palmata
Terebella rubra
Theleous setosus

SABELLIDAE

Branchiomma nigromaculata
Chone duneri
Megalomma bioculatum
Sabella microphthalma

SERPULIDAE

Eupomatus dianthus

1

1

21

1

25

1

14

100 +

860

STATION PB-l-A

Sediment Type: - Date: Nov. 13

Weight Percentages — Granules: - Sands: -

Silts: - Clay:

Family and Species Dredge Shovel Net

CIRRATULIDAE

Tharyx sp. C 15

CAPITELLIDAE

Dasybranchus lumbricoides 1

Dasybranchus lunulatus 1

Heteromastus f ilif ormis 25

MALDANIDAE

Branchioasychis americana 1

AMPHARETIDAE

Sabellides oculata 2

861

STATION PB-4

Sediment Type: Sand

Weight Percentages — Granules: 3.8

Silts: 1.8

Date: Nov. 13

Sands :
Clay:

94.
0.

Family and Species

Dredge Shovel Net

POLYNCIDAE

Lepidasthenia commensalis
Lepidonotus sublevis
Lepidonotus variabilis

SIGALICNIDAE

Sthenelais boa

PHYLLODOCIDAE

Eteone heteropoda
~umida sanquinea
Phyliodoce arenae
Phyllodoce f ragilis

HESIONIDAE

Gyptis vittata
Parahesione luteola
Podarke obscura

SYLLIDAE

Autolytus cornutus
Exoqone dispar
Syllis varieqata
Syllis sp. B

NEREIDAE

Nereis arenaceodentata
Nereis p_. occidentalis
Nereis succinea
Platynereis dumerilil

GLYCERIDAE

Glycera americana

GONIADIDAE

Glycinde pacif ica

ONUPHIDAE

Diopatra cuprea
Onuphis nebulosa
Onuphis sp.

12
?

166

47

3 0

25

1

424

178
2

10

1

31

1

382

1

1

7

71
10

30

STATION PB-4 — (Continued)

862

Family and Species

Dredge Shovel Net

ARABELLIDAE

Drilonereis magna

DORVILLEIDAE

Dorvillea rudolphi

ORBINIIDAE

Scoloplos robustus
Scoloplos rubra

PARACNIDAE

\ricidea f ragilis

SPIONIDAE

Apoprionospio pygmaea

Para^rionospio pinnata
Folydora socialis
Polydora websteri
Prionospio h. texana
Streblospio benedicti

MAGELCNIDAE

Kagelona pettiboneae

22
2

1

10

8

2
6

1
6

733

17
6

CIRRATULIDAE

Cirratulus grandis
Cirratulus sp. B
Tharyx sp. C

10

OPHSLIIOAE

Ammo try pane aulogaster

CAPITELLIDAE

Capitella capitata
Capitellides jonesi
Capitomastus aciculatus
Dasybranchus lunulatus
Heteromastus filif ormis

KALDANIDAE

Clymenella mucosa

OWENIIDAE

Boguea enigmatlca
Owenia fusiformis

3 7

77

3

1

1

10

1

5

1

10

15

STATION PB-4 — (Continued)

863

Family and Species

Dredge Shovel Net

SABELLARIIDAE

Sabellaria gracilis

PECTINARIIDAE

Cistenides gouldii

AMPHARSTIDAE

Melinna maculata
Sabellides oculata

TEREBSLLIDAE

Pista cristata

Fista palmata
Thelepus setosus

SABELLIDAE

Branchiomma nigromaculata
Meqalomma bioculatum
Sabella microphthalma

SERPULIDAE

Eupomatus dianthus

2

27

55
10

864

STATION PB-5

Sediment Type: Sand

Weight Percentages — Granules: 0.0

Silts:

1.4

Date: Nov. 13

Sands:
Clay:

98.0
0.6

Family and Species

Dredge Shovel Net

POLYNCIDAE

Polynoid B

SIGALIONIDAE

Sthenelais boa

PHYLLODOCIDAE

Eteone heteropoda
Eumida sanquinea
Phyllodoce arenae
Phyllodoce fraqilis

SYLLIDAE

Exogone dispar

NEREIDAE

Nereis arenaceodentata
Nereis p_. occidentalis
Nereis succinea

NEPHTYIDAE

Aglaophamus verrilli

GLYCERIDAE

Glycera americana

GONIADIDAE

Glycinde pacif ica

ONUPHIDAE

Diopatra cuprea
Onuphis nebulosa
Onuphis sp.

EUNICIDAE

Marphysa sanquinea

LUMBRINERIDAE

Lumbrineris sp.

2

7

12

5
2 3
52

184
39

10

STATION PB-5— (Continued)

865

Family and Species

Dredge Shovel Net

DORVILLEIDAE

Dorvillea rudolphi

ORBINIIDAE

Scoloplos robustus

PARAONIDAE

Aricidea fragilis

SPIONIDAS

Apoprionospio pygmaea
Paraprionospio pinnata
Polydora socialis
Polydora websteri
Spiophanes bombyx
Streblospio benedicti

CIRRATULIDAE

Cirratulus grandls

OPHELIIDAE

Ammotrypane auloqaster

CAPITELLIDAE

Capitella capitata
Capitellides jonesi
Dasybranchus lunulatus
Heteromastus f iliformis

MALDANIDAE

Clymenella mucosa

OWENIIDAE

Owenia fusiformis

5

17
1
1

1
1

1

10

2

6

14

SABELLARIIDAE

Sabellaria gracilis

11

TEREBELLIDAE

Pista cristata
Pista palmata
Terebella rubra

866

STATION PB-5 — (Continued)

Family and Station Dredge Shovel Net

SABELLIDAE

Branchiomma nigromaculata 288 32

Kegalomma bioculatum 1

Sabella microphthalma 2

APPENDIX B

In this appendix, the polychaetes collected at
transect stations in Tampa Bay Estuary from June through
December, 1963, are listed by family and species; and
the number of individuals taken by dredge, shovel, or
net is indicated. Sediment characteristics and the
collection date for each station are also included.

867

868

STATION 1-1

Sediment Type: Sand

Weight Percentages — Granules: 0.6

Silts: 0.6

Date: June 18

Sands:
Clay:

97.9
0.8

Family and Species

Dredge Shovel Net

AMPHINONIDAE

Pseudeurythoe amblgua

NEREIDAE

Nereis succinea

ONUPHIDAE

Diopatra cuprea

CAPITELLIDAE

Heteromastus fillformis

PECTINARIIDAE

Cistenldes qouldii

STATION 1-2

869

Sediment Type: Sand

Weight Percentages — Granules: 0.3

Silts: 0.8

Date: June 19

Sands:
Clay:

97.3
1.6

Family and Species

PHYLLODCCIDAE

Eteone heteropoda

NEREIDAE

Nereis succinea
Platynereis dumerilii

NEPHTYIDAE

Aglaophamus verrilli

GLYCERIDAE

Glycera americana

ONUPHIDAE

Diopatra cuprea

ORBINIIDAE

Scoloplos rubra

SPIONIDAE

Paraprionospio pinnata

PECTINARIIDAE

Cistenides gouldii

Dredge Shovel Net

12

11

870

Weight Percentages

STATION 1-3

ty Sand

Date: June 19

— Granules:

0.3

Sands: 71.4

Silts:

16.4

Clay: 11.8

Family and Species

Dredge Shovel Net

POLYNCIDAE

Polynoid B

SIGALIONIDAE

Sthenelais boa

AMPHINOMIDAE

Pseudeurythoe ambiqua

PHYLLODOCIDAE

Phyllodoce arenae

HESIONIDAE

Gyptis vittata
Parahesione luteola
Gyptis sp.

NEREIDAE

Nereis succinea

GLYC-RIDAE

Glycera americana

GONIADIDAE

Glycinde pacif ica

ONUPHIDAE

Diopatra cuprea

ORBINIIDAE

Scoloplos rubra

SPIONIDAE

Paraprionospio pinnata
Prionospio cirrobranchiata

CHAETOPTERIDAE

Spiochaetopterus c. oculatus

PECTINARIIDAE

Cistenides gouldii

40

5

33

6

3

40
2

2
10

3
1

11
12

10
1
1

12
2

10

40

STATION 1-4

871

Sediment Type: Sand

Weight Percentages — Granules:

Silts:

Date:

June 19

0.1

Sands

: 95.2

2.4

Clay:

3.4

Family and Species

Dredge Shovel Net

POLYNOIDAE

Polynoid B

40

SIGALICNIDAE

Sthenelais boa

AMPHINOMIDAE

Pseudeurythoe ambiqua

PHYLLCDOCIDAE

Eteone heteropoda
Phyllodoce arenae

HESIONIDAE

Gyptis vittata
Gyptis sp.

PILARGIDAE

Sigambra bassi

NEREIDAE

Nereis succinea

NEPHTYIDAE

Nephtys picta

GLYCSRIDAE

Glycera americana

G0N1ADIDAE

Glycinde pacif ica

ONUPHIDAE

Diopatra cuprea

OR3INIIDAE

Scoloplos rubra

SPIONIDAE

Paraprionospio pinnata

iTionosplo cir rebranch lata
Pseudopolydora sp.

11

11
1

13

25

3b
13
94

13

40

4S

241

1

872

STATION 1-4— (Continued)

Family and Species Dredge Shovel Net

CHAETOPTSRIDAE

Spiochaetopterus c. oculatus 3 14

CIRRATULIDAE

Tharyx sp. C 6

CAPITELLIDAE

Notomastus hemipodus 1

MALDANIDAE

Maldane sarsi 2

PECTINARIIDAE

Cistenides qouldii 7 62

STATION 1-5

873

Sediment Type: Sand

Weight Percentages — Granules: 0.14

Silts: 4.8

Date: June 20

Sands:
Clay:

90.0
5.1

Family and Species

Dredge Shovel Net

POLYNOIDAE

Polynoid B

SIGALIONIDAE

Sthenelais boa

AHPHINOMIDAE

Pseudeurythoe ambiqua

PHYLLODOCIDAE

Phyllodoce arenae

HESIONIDAE

Gyptis vittata
Parahesione luteola
Gyptis sp.

PILARGIDAE

Sigambra bassi

NEREIDAE

Nereis succinea

GLYCERIDAE

Glycera americana

GONIADIDAE

Glycinde pacifica

ONUPHIDAE

Diopatra cuprea

ORBINIIDAE

Scoloplos rubra

SPIONIDAE

Paraprionospio pinnata
Prionospio cirrobranchiata

12
2

1

14

42

14

IS

23
1

23

12

8

53

874

STATION 1-5 — (Continued)

Family and Species Dredge Shovel Net

CHAETOPTERIDAE

Spiochaetopterus c. oculatus 3 1

PECTINARIIDAE

Cistenides gouldii 8 26

875

STATION 2-1

Sediment Type: Sand
Weight Percentages -

Granules: 0.3
Silts: 1.9 n

Date: July 2

Sands: 95.0
Clay: 2.9

Family and Species

Dredge Shovel Net

NEREIDAE

Nereis succinea

GLYCERIDAE

Glycera americana

ONUPHIDAE

Diopatra cuprea
Onuphis sp.

ORBINIIDAE

Scoloplos rubra

ARENICOLIDAE

Arenicola cristata

MALDANIDAE

Clymenella mucosa

PECTINARIIDAE

Cistenides qouldii

AKPHARETIDAE

Melinna maculat a

876

STATION 2-2

Sediment Type: Sand
Weight Percentages -

Date:

July 2

Granules:

0.4

Sands

: 95.3

Silts:

2.0

Clay

2.3

Family and Species Dredge Shovel Net

NEREIDAE

Nereis succinea 6 14

Flatynereis dumerilii 4

GLYCERIDAE

Glycera americana 7

ONUPHIDAE

Diopatra cuprea 1

ORBINIIDAE

Scoloplos rubra 2

SPIONIDAE

Paraprionospio pinnata 1

MALDANIDAE

Branchioasychis americana 3

AKPHARETIDAE

Melinna maculata S

877

STATION 2-3

Sediment Type: Sand Date: July 2

Weight Percentages — Granules: 0.2 Sands: 96.6

Silts: 1.3 Clay: 1.8

Family and Species Dredge Shovel Net

PHYLLODOCIDAE

Eumida sanquinea 1

NEREIDAE

Nereis succinea 3 5

Platynereis dumerilii 4

GLYCERIDAE

Glycera americana 6

ONUPHIDAE

Diopatra cuprea 13

ORBINIIDAE

Scoloplos rubra 3

PARAONIDAE

Aricidea sp. 1

SPIONIDAE

Paraprionospio pinnata 2

CHAETOPTSRIDAE

Spiochaetopterus c. oculatus 1

MALDANIDAE

Branchioasychis americana 1

AMPHARETIDAE

Kelinna maculata 40

878

STATION 2-4

Sediment Type: Sand Date: July 3

Weight Percentages — Granules: 0.0 Sands: 93.2

Silts: 2.3 Clay: 4.4

Family and Species Dredge Shovel Net

NEREIDAE

Nereis succinea 5

GLYCERIDAE

Glycera americana 20

EUNICIDAE

Marphysa sanguinea 1

ORBINIIDAE

Scoloplos rubra 5

SPIONIDAE

Paraprionospio pinnata 1

MALDANIDAE

Branchioasychis americana 1

Maldane sarsi 2

PECTINARIIDAE

Cistenides gouldii 2

AKPHARETIDAE

Melinna maculata 15

Sabeliides oculata 1

879

STATION 2-5

Sediment Type: Sand Date: July 3

Weight Percentages — Granules: 0.0 Sands: 92.8

Silts: 4.2 Clay: 3.0

Family and Species Dredge Shovel Net

NEREIDAE

Nereis succinea 2

GLYCSRIDAE

Glycera americana 8

GONIADIDAE

Glycinde pacifica 1

ONUPHIDAE

Diopatra cuprea 5

ORBINIIDAE

Scoloplos rubra 3

SPIONIDAE

Paraprionospio pinnata 3

CHAETOPTERIDAE

Spiochaetopterus c. oculatus 2

KALDANIDAE

Branchioasychis americana 15

PECTINARIIDAE

Cistenides gouldii 1

AMPHARETIDAE

Melinna maculata 7

880

STATION 3-1-A

Sediment Type: Sand
Weight Percentages -

Date:

July 10

Granules:

0.0

Sands

: 99.4

Silts:

0.3

Clay:

0.4

Family and Species Dredge Shovel Net

AKPHINONIDAE

Pseudeurythoe ambiqua 1

PHYLLODOCIDAE

Phyllodoce fraqilis 3

HESIONIDAE

Gyptis vittata 5 1

Parahesione luteola 11

NEREIDAE

Nereis succinea 147

GLYCERIDAE

Glycera americana 1 1

GONIADIDAE

Glycinde pacif ica 1

EUNICIDAE

Karphysa sanguinea 37

DORVILLEIDAE

Dorvillea rudolphi 2

0RBINIIDAE

Scoloplos rubra 1

PARAONIDAE

Aricidea fragilis 1

SPIONIDAE

Polydora websteri 19

Prionospio cirrobranchiata 2

CIRRATULIDAE

Tharyx sp. C 1

PECTIN<\RIIDAE

Cistenides qouldii 1

881

STATION 3-1-B

Sediment Type: Shelly Sand Date: July 10

Weight Percentages — Granules: 41.3 Sands: 41.8

Silts: 10.4 Clay: 6.5

Family and Species Dredge Shovel Net

No Polychaetes Recorded

882

STATION 3-2

Sediment Type: Shelly Sand Date: July 11

Weight Percentages — Granules: 79.7 Sands: 20.2

Silts: 0.1 Clay: 0.1

Family and Species Dredge Shovel Net

PHYLLODOCIDAE

Phyllodoce arenae 1

HESIONIDAE

Gyptis vittata 1

NEREIDAE

Nereis succinea 1

GLYCERIDAE

Glycera americana 22

GCNIADIDAE

Glycinde pacif ica 3

ONUPHIDAE

Diopatra cuprea 6

ORBINIIDAE

Scoloplos rubra 2

SPIONIDAE

Paraprionospio pinnata 17

MAGELONIDAE

Kaqelona pettiboneae 2

CHAETOPTERIDAE

Spiochaetopterus c. ocutatus 1

883

STATION 3-3

Sediment Type: Sand Date: July 11

Weight Percentages — Granules: 0.0 Sands: 97.1

Silts: 1.2 Clay: 1.7

Family and Species Dredge Shovel Net

POLYNCIDAE

Polynoid B 1

SIGALIONIDAE

Sthenelais boa 1

PHYLLODCCIDAE

Eteone heteropoda 6

NEPHTYIDAE

Aglaophamus verrilli 1

Nephtys picta 1

GLYC^RIDAE

Glycera americana 32

GONIADIDAE

Glycinde pacif ica 1

ONUPHIDAE

Diopatra cuprea 9

ORBINIIDAE

Scoloplos rubra 3

SPIONIDAE

Paraprionospio pinnata 6

CHAETOFTBRIDAE

Spiochaetopterus c. oculatus 11

PECTINARIIDAS

Cistenides gouldii 13

884

STATION 3-4

Sediment Type: Silty Sand

Weight Percentages — Granules: 0.0

Silts: 13.8

Date:

July 11

Sands

: 78.1

Clay:

8.0

Family and Species Dredge Shovel Net

POLYNOIDAE

Polynoid B 4

SIGALIONIDAE

Sthenelais boa 12 43

AMPHINOKIDAE

Pseudeurythoe ambiqua 22 1

PHYLLODOCIDAE

Phyllodoce arenae 1 1

HESIONIDAE

Gyptis vittata 3

Parahesione luteola 1

PILARGIDAE

Sigambra tentaculata 6

GLYCERIDAE

Glycera americana 17 12

GONIADIDAE

Glycinde pacif ica 3 12

SPIONIDAE

Paraprionospio pinnata 49 163

Pseudopolydora sp. 5

CHAETOPTERIDAE

Spiochaetopterus c. oculatus 2 1

PECTINARIIDAE

Cistenides qouldii 1 2

885

STATION 3-5

Sediment Type: Silty Sand Date: July 12

Weight Percentages — Granules: 0.0 Sands: 73.1

Silts: 13.6 Clay: 13.3

Family and Species Dredge Shovel Net

POLYNOIDAE

Polynoid B 2

SIGALIONIDAE

Sthenelais boa 1

AMPHINOMIDAE

Pseudeurythoe ambiqua 37 1

PHYLLODOCIDAE

Phyllodoce arenae 1

HESIONIDAE

Gyptis vittata 2

Parahesione luteola 2

PILARGIDAE

Sigambra tentaculata 3

GLYCERIDAE

Glycera americana 11 24

GONIADIDAE

Glycinde pacif ica 2 36

SPIONIDAE

Paraprionospio pinnata 27 85

Pseudopolydora sp. 1

CHAETOPTERIDAE

Spiochaetopterus c. oculatus 4 18

PECTINARIIDAE

Cistenides gouldii 1 5

AMPHARETIDAE

Melinna maculata 6

886

STATION 3-6

Sediment Type: Silty Sand Date: July 12

Weight Percentages — Granules: 0.1 Sands: 77.4

Silts: 11.5 Clay: 11.1

Family and Species Dredge Shovel Net

POLYNOIDAE

Polynoid B 3

SIGALIONIDAE

Sthenelais boa 2 4

AMPHINOMIDAE

Pseudeurythoe ambiqua 2

PHYLLODOCIDAE

Phyllodoce arenae 2

HESIONIDAE

Gyptis vittata 2 2

GLYCERIDAE

Glycera americana 8

GONIADIDAE

Glycinde pacif ica 2 4

SPI0N1DAE

Paraprionospio pinnata 28 59

CHAETOPTERIDAE

Spiochaetopterus c. oculatus 10 7

PECTINARIIDAE

Cistenides qouldli 4

887

STATION 3-7

Sediment Type: Silty Sand Date: July 12

Weight Percentages — Granules: 0.1 Sands: 76.4

Silts: 12.4 Clay: 11.2

Family and Species Dredge Shovel Net

POLYNOIDAE

Polynoid B 3

SIGALICNIDAE

Sthenelais boa 1 5

AKPHINOMIDAE

Pseudeurythoe ambiqua 1

HESIONIDAE

Gyptis vittata 2

Parahesione luteola 2

GLYCERIDAE

Glycera americana 16

GONIADIDAE

Glycinde pacif ica 5 5

SPIONIDAE

Paraprionospio pinnata 38 58

Polydora websteri 1

Pseudopolydora sp. 3

CHAETOPTERIDAE

Spiochaetopterus c. oculatus 6

MALDANIDAE

Kaldane sarsi 1

PECTINARIIDAE

Cistenides gouldii *

888

STATION 3-8

Sediment Type: Sand Date: July 12

Weight Percentages — Granules: 0.2 Sands: 95.9

Silts: 1.0 Clay: 2.8

Family and Species Dredge Shovel Net

SIGALIONIDAE

Sthenelais boa 2

PHYLLCDCCIDAE

Steone heteropoda 2

Faranaites speciosa 1

Fhyllodoce arenae 2

NEREIDAE

Nereis succinea 1

NEPHTYIDAE

Aglaophamus verrilli 3

Nephtys picta 6

GLYCERIDAE

Glycera americana 50

GONIADIDAE

Glycinde pacif ica 8

ONUPHIDAE

Dioptra cuprea 1

ORBINIIDAE

Scoloplos rubra 2

SPIONIDAE

Apoprionospio pyqmaea 2

Paraprionospio pinnata 52 4

CHAETOPTERIDAE

Spiochaetopterus c. oculatus 50

OPHELIIDAE

Travisia sp. 22

CAPITELLIDAE

Notomastus hemipodus 4

889
STATION 3-8 — (Continued)

Family and Species Dredge Shovel Net

PECTINARIIDAE

Cistenides qouldii 11

TEREBELLIDAE

Loimia medusa 3

890

STATION 3-9

Sediment Type: Sand Date: July 12

Weight Percentages — Granules: 0.0 Sands: 97.7

Silts: 0.7 Clay: 1.6

Family and Species Dredge Shovel Net

AMPHINOMIDAE

Pseudeurythoe ambiqua 1

PHYLLODOCIDAE

Eteone heteropoda 1

Paranaites speciosa 1

Phyllodoce arenae 1

NEPHTYIDAE

Aqlaophamus verrilli 10

Nephtys picta 6

GLYCSRIDAE

Glycera americana 39

GONIADIDAE

Glycinde pacif ica 2

ORBINIIDAE

Scoloplos rubra 4

SPIONIDAE

Apoprionospio pyqmaea 1

Paraprionospio pinnata 44

Pseudopolydora sp. 1

CHAETOPTERIDAE

Spiochaetopterus £. oculatus 4

OPHELIIDAE

Travisia sp. 72

CAPITELLIDAE

Notomastus hemipodus 2

891

STATION 3-10

Sediment Type: Sand

Date: July 17

Weight Percentages — Granules:

Silts:

0.1
0.4

Sands: 98.9
Clay: 0.6

Family and Species

Dredge

Shovel Net

POLYNOIDAE

Polynoid B

1

SIGALIONIDAE

Sthenelais boa

1

PHYLLODICIDAE

Phyllodoce arenae

1

HESIONIDAE

Gyptis vittata
Gyptis sp.

1
1

NEREIDAE

Nereis succinea

1

NEPHTYIDAE

Aqlaophamus verrilli

3

GLYCERIDAE

Glycera americana

6

ONUPHIDAE

Diopatra cuprea

1

ORBINIIDAE

Scoloplos rubra

1

SPIONIDAE

Apoprionospio pyqmaea
Paraprionospio pinnata
Polydora socialis

3
7

2

OPHELIIDAE

Travisia so.

CAPITELLIDAE

Notomastus hemopodus

2

892

STATION 3-11

Sediment Type: Sand

weight Percentages — Granules: 0.1

Silts: 5.6

Date: July 17

Sands:
Clay:

93.8
0.5

Family and Species

Dredge Shovel Net

POLYNOIDAE

Polynoid B

SIGALIONIDAE

Sthenelais boa

PHYLLODOCIDAE

Eteone heteropoda
Phyllodoce arenae

HESIONIDAE

Gyptis vittata

NEREIDAE

Nereis succinea

NEPHTYIDAE

Aqlaophamus verrilli
N'ephtys picta

GLYCERIDAE

Glycera americana

G0N1ADIDAE

Glycinde pacif ica

ONUPHIDAE

Diopatra cuprea

SPIONIDAE

Paraprionospio pinnata

Spiophanes bombyx

CHAETOPTERIDAE

Spiochaetopterus c. oculatus

OPHELIIDAE

Travisia sp.

CAPITELLIDAE

Notomastus hemipodus

2
11

30
10

3 0

56
1

103
37

3

893

STATION 3-11 — (Continued)

Family and Species

Dredge Shovel Net

MALDANIDAE

Maldane sarsi

PECTINARIIDAE

Cistenides gouldll

894

STATION 3-12

Sediment Type: Sand Date: July 17

Weight Percentages — Granules: 0.2 Sands: 93.4

Silts: 4.7 Clay: 1.8

Family and Species Dredge Shovel Net

POLYNOIDAE

Polynoid A 1

SIGALIONIDAE

Sthenelais boa 5 1

PHYLLODOCIDAE

Eumida sanquinea 1

Paranaites speciosa 2

Phyllodoce arenae 16 8

HESIONIDAE

Gyptis vittata 2

NEREIDAE

Nereis succinea 5 3

NEPHTYIDAE

Aqlaophamus verrilll 13

Nephtys picta 5

GLYCERIDAE

Glycera americana 44

GONIADIDAE

Glycinde pacif ica 21 2

ONUPHIDAE

Diopatra cuprea 1

ORBINIIDAE

Scoloplos robustus 3

Scoloplos rubra 6

SFIONIDAE

Apoprionospio pygmaea 1

Paraprionospio pinnata 116 6

CHAETOPTERIDAE

Spiochaetopterus c. oculatus 309 1

895

STATION 3-12-—(Continued)

Family and Species Dredge Shovel Net

OPHELIIDAE

Travisia sp. 17

CAP1TELLIDAE

Notomastus hemipodus 2

PECTINARIIDAE

Cistenides gouldii 6

AMPHARETIDAE

Melinna maculata 1

896

STATION 3-13

Sediment Type: Sand Date: July 17

Weight Percentages — Granules: 0.5 Sands: 96.8

Silts: 1.3 Clay: 1.4

Family and Species Dredge Shovel Net

SIGALIONIDAE

Sthenelais boa 1

NEREIDAE

Nereis succinea 4 1

Platynereis dumerilii 1

GLYCERIDAE

Glycera amerlcana 10

GONIADIDAE

Glycinde pacifica 2

ONUPHIDAE

Diopatra cuprea 4

ORBINIIDAE

Scoloplos robustus 12

SPIONIDAE

Apoprionospio pyqmaea 1

Paraprionospio pinnata 1

CHAETOPTITRIDAE

Spiochaetopterus c. oculatus 1

OPHELIIDAE

Travisia sp. 3

PECTINARIIDAE

Cistenides gouldii 1

897

STATION 3-14

Sediment Type: Sand Date: July 1£

Weight Percentages — Granules: 0.4 Sands: 93.3

Silts: 3.0 Clay: 3.4

Family and Species Dredge Shovel Net

PHYLLODOCIDAE

Eumida sanguinea 1 5

NEREIDAE

Nereis succinea 4 16

GLYCERIOAE

Glycera americana 3

ONUPHIDAE

Diopatra cuprea 4

ORBINIIDAE

Scoloplos robustus 1

Scoloplos rubra 2

PARAOMIDAE

Aricidea sp. 1

CHAETOPTERIDAE

Spiochaetopterus c. oculatus 3

CAPITSLLIDAE

Capitella capitata 1

Notomastus hemioodus 3

ARENICOLIDAE

Arenicola cristata 1 1

PECTIMARIIDAE

Cistenides gouldii 1

AMPHARETIDAE

Melinna maculata 8

898

STATION 3-15

Sediment Type: Sand Date: July IE

Weight Percentages — Granules: 0.2 Sands: 98.1

Silts: 1.1 Clay: 0.6

Family and Species Dredge Shovel Net

HSSIONIDAE

Parahesione luteola 1

NEREIDAE

Nereis succinea 3 2

GLYCERIDAE

Glycera americana 7 1

GONIADIDAE

Glycinde pacif ica 1

ONUPHIDAE

Diopatra cuprea 2

EUNICIDAE

Marphysa sanquinea 3

ORBINIIDAE

Scoloplos rubra 3

CHAETOPTSRIDAE

Spiochaetopterus c. oculatus 3

CAPITELLIDAE

Capitella capita ta 1

Notomastus hemipodus 5

ARENICOLIDAE

Arenicola cristata 1

PECTINARIIDAE

Cistenides gouldii 5 2

AMPHARETIDAE

Melinna maculata 8

Sabellides oculata 1

899

STATION 3-16

Sediment Type: Sand

Weight Percentages — Granules: 0.1

Silts: 0.9

Date: July 16

Sands: 97.5
Clay: 1.5

Family and Species

Dredge Shovel Net

SIGALIONIDAE

Sthenelais boa

HESIONIDAE

Gyptis vittata

NEREIDAE

Nereis succinea

NEPHTYIDAE

Nephtys picta

GLYCERIDAS

Glycera americana

GONIADIDAE

Glycinde pacif ica

ONUPHIDAE

Diopatra cuprea

ORBINIIDAE

Scoloplos rubra

SPIONIDAE

Polydora socialis

CHAETOPTERIDAE

Spiochaetopterus c. oculatus

CAPITELLIDAE

Notomastus hemipodus

AMPHARETIDAE

Kelinna maculata

TEREBELLIDAE

Loimia medusa

1
7
1
3

17
1

12
5

12
1

900

STATION 3-17

Sediment Type: Sand
Weight Percentages -

Date:

July

13

Granules:

0,

.3

Sands

: 92.

,7

Silts:

3,

.5

Clay:

3.

.6

Family and Species

NEREIDAE

Nereis £. occidentalis
Nereis succinea

GLYC3RIDAE

Glycera americana

SPI0N1DAE

Polydora websteri
Streblospio benedicti
Pseudopolydora sp.

CAPITELLIDAE

Capitella capitata

ARENICOLIDAE

Arenicola crista ta

AMPHARETIDAE

Melinna maculata

Dredge Shovel Net

3
2

11

STATION 4-1

901

Sediment Type: Sand

Weight Percentages — Granules: 0.3

Silts: 4.7

Date: July 24

Sands: 91.3
Clay: 3.7

Family and Species

Dredge Shovel Net

PHYLLODOCIDAE

Phyllodoce arenae

NEREIDAE

Laeonereis culveri
Nereis succinea
Platynereis dumerilii

GLYCERIDAE

Glycera americana

GONIADIDAE

Glycinde pacifica

ONUPHIDAE

Diopatra cuprea

EUNICIDAE

Karphysa sanquinea

SPIONIDAE

Polydora websteri

CAPITELLIDAE

Notomastus latericeus

12

AMPHARETIDAE

Melinna maculata

902

Sediment Type: Sand

STATION 4-2

Date:

July 24

— Granules: 0.1

Sands

: 87.3

Silts: 10.4

Clay:

2.2

Family and Species

Dredge Shovel Net

POLYNOIDAE

Polynoid B

PHYLLODOCIDAE

Steone heteropoda
Phyllodoce arenae

HESIONIDAE

Gyptis vittata

NEREIDAE

Laeonereis culveri
Nereis succinea

GLYCERIDAE

Glycera americana

GONIADIDAE

Glycinde pacif ica

ONUPHIDAE

Diopatra cuprea

ORBINIIDAE

Scoloplos rubra

SPIONIDAE

Paraprionospio pinnata
Prionospio cirrobranchiata
Pseudopolydora sp.

CHAETOPTERIDAE

Spiochaetopterus c. oculatus

CIRRATULIDAE

Tharyx sp. C

PSCTINARIIDAE

Cistenides qouldii

AKPHARETIDAE

Kelinna maculata

1
1

2
12

25

11
3

5

903

STATION 4-3

Sediment Type: Silty Mud

Weight Percentages — Granules: 0.2

Silts: 35.9

Date: July 25

Sands: 33.7
Clay: 30.2

Family and Species

Dredge Shovel Net

POLYNOIDAE

Polynoid A

SIGALIONIDAE

Sthenelais boa

AKPHINCMIDAE

Pseudeurythoe ambiqua

HESIOSIDAE

Gyptis vittata
Parahesione luteola

NEREIDAE

Nereis succinea

GLYCERIDAE

Glycera americana

GONIADIDAE

Glycinde pacif ica

ONUPHIDAE

Diopatra cuprea

SPIONIDAE

Paraprionospio pinnata
Pseudopolydora sp.

PECTINARIIDAE

Cistenides qouldii

10

904

STATION 4-4

Sediment Type: Sandy Mud Date: July 25

Weight Percentages — Granules: 0.2 Sands: 43.4

Silts: 27.5 Clay: 28.9

Family and Species Dredge Shovel Net

SIGALIONIDAE

Sthenelais boa 9

AMPHINOMIDAE

Pseudeurythoe ambiqua 2

HESIONIDAE

Gyptis vittata 2

PILARGIDAE

Slqambra tentaculata 1

NEREIDAE

Laeonereis culveri 1

Nereis succinea 1 1

GLYCERIDAE

Glycera americana 1

GONIADIDAE

Glycinde pacifica 2 6

SPIONIDAE

Paraprionospio pinnata 26 58

Pseudopolydora sp. 21

CHAET0PT5RIDAE

Spiochaetopterus c. oculatus 6 1

905

Sediment Type: Sand
Weight Percentages -

STATION 4-5

Date:

July 25

- Granules:

0.3

Sands

: 98.1

Silts:

1.1

Clay:

0.5

Family and Species

Dredge Shovel Net

POLYNOIDAE

Polynoid B

SIGALIONIDAE

Sthenelais boa

PHYLLODOCIDAE

Eteone heteropoda

NEREIDAE

Nereis succinea

GLYCERIDAE

Glycera americana

GONIADIDAE

Glycinde pacif ica

ONUPKIDAE

Diopatra cuprea

ORBINIIDAE

Scoloplos robustus
Scoloplos rubra

SPIONIDAE

Apoprionospio pyqmaea
Paraprionospio pinnata

KAGELONIDAE

Maqelona pettiboneae

PECTINARIIDAE

Cistenides qouldii

23

3
62

STATION 4-6

906

Sediment Type: Sand

Weight Percentages — Granules:

Silts:

Date: July 25

0.0

Sands: 92.2

6.5

Clay: 1.2

Family and Species

Dredge Shovel Net

POLYNOIDAE

Polynoid B

SIGALIONIDAE

Sthenelais boa

PHYLLCDOCIDAS

Phyllodoce arenae

HESIONIDAE

Gyptis vittata
Parahesione luteola

PILARGIDAE

Cabira incerta

NEREIDAE

Nereis succinea 7

GLYCSRIDAE

Glycera americana 43

GONIADIDAE

Glycinde pacifica 17

ONUPHIDAE

Diopatra cuprea 4

ORBINIIDAE

Scoloplos rubra 9

SPIONIDAE

Paraprionospio pinnata 70

I-rionospio cirrobranchiata 1

Pseudopolydora sp. 74

CHAETOPTERIDAE

Spiochaetopterus c. oculatus 12

13

907

STATION 4-6 — (Continued)

Family and Species

Dredge Shovel Net

PECTINARIIDAE

Cistenides qouldii

TEREBELLIDAE

Loimia medusa

908

STATION 4-7

Sediment Type: Sand

Date: July 26

Weight Percentages — Granules:

Silts:

1.2

5.2

Sands: 87.6
Clay: 5.9

Family and Species

Dredge

Shovel Net

POLYNCIDAE

Phyllohartmania taylori
Polynoid B

1
15

S1GALIONIDAE

Sthenelais boa

1

4

PHYLLODOCIDAE

Fhyllodoce arenae

1

2

HESIONIDAE

Gyptis vittata
Parahesione luteola

3
3

PILARGIDAE

Siqambra tentaculata

3

NEREIDAE

Nereis succinea

5

2

NEPHTYIDAE

Nephtys picta

1

GLYC3RIDAE

G lycera americana

23

1

SONIADIDAE

Glycinde pacifica

13

s

ONUPHIDAE

Diopatra cuprea

1

ORBINIIDAE

Scoloplos rubra

6

SPIONIDAE

Faraprionospio pinnata
Prionospio cirrobranchiata

Pseudopolydora sp.

116

2

64

9 3

909

STATION 4-7 — (Continued)

Family and Species Dredge Shovel Net

CHAETOPTERIDAE

Spiochaetopterus c. oculatus 10 1

CAPITELLIDAE

Heteromastus filiformis 1

PECTINARIIDAE

Cistenides gouldii

910

STATION 4-8

Sediment Type: Sand Date: July 26

Weight Percentages — Granules: 0.1 Sands: 94.0

Silts: 2.8 Clay: 3.0

Family and Species Dredge Shovel Net

POLYNOIDAE

Polynoid B 1

HESIONIDAE

Gyptis vittata 1

PILARGIDAE

Siqambra tentaculata 1

NEREIDAE

Nereis succinea 2 2

NEPHTYIDAE

Nephtys picta 3

GLYCERIDAE

Glycera americana 19

GONIADIDAE

Glycinde pacif ica 11 2

ONUPHIDAE

Diopatra cuprea 1

ORBINIIDAE

Scoloplos rubra 7

SPIONIDAE

Paraprionospio pinnata 37 38

Prionospio cirrobranchiata 1

Pseudopolydora sp. 23

CHAETOPTERIDAE

Spiochaetopterus c. oculatus 13 1

MALDANIDAE

Kaldane sarsi 1

911

STATION 4-9

Sediment Type: Sand Date: July 26

Weight Percentages — Granules: 0.0 Sands: 98.1

Silts: 1.0 Clay: 1.0

Family and Species Dredge Shovel Net

SIGALIONIDAE

Sthenelais boa 4

AMPHINOMIDAE

Pseudeurythoe ambiqua 1

PHYLLODOCIDAE

Phyllodoce arenae 1

NERSIDAE

Nereis succinea 10

NEPHTYIDAE

Nephtys picta 2

GLYCSRIDAE

Glycera americana 26

GONIADIDAE

Glycinde pacif ica 26

ORBINIIDAE

Scoloplos rubra 10

SPIONIDAE

Paraprionospio pinnata 48

Pseudopolydora sp. 2

CHAETOPTERIDAE

Spiochaetopterus c. oculatus 4

912

STATION 4-10

Sediment Type: Sand

Weight Percentages — Granules: 0.0

Silts: 0.4

Date: July 26

Sands: 98.8
Clay: 0.8

Family and Species

Dredge Shovel Net

HESIONIDAE

Gyptis vittata

NERSIDAE

Nereis succinea

GLYCERIDAE

Glycera americana

GONIADIDAE

Glycinde pacifica

ORBINIIDAE

Scoloplos rubra

SPIONIDAE

Apoprionospio pyqmaea
Paraprionospio pinnata
Pseudopolydora sp.

MAGELCNIDAE

Magelona pettiboneae

OPHELIIDAE

Travisia sp.

CAPITELLIDAE

Notomastus hemipodus

3

11

1

913

STATION 4-11

Sediment Type: Sand Date: July 26

Weight Percentages — Granules: 0.2 Sands: 97.2

Silts: 1.3 Clay: 1.3

Family and Species Dredge Shovel Net

POLYNGIDAE

Polynoid B 2

PHYLLODOCIDAE

Phyllodoce arenae 4

NERSIDAE

Nereis succinea 3 14

NEPHTYIDAS

Aglaophamus verrilli 1

GLYCERIDAE

Glycera americana 14

GONIADIDAE

Glycinde pacif ica 17

0R5INIIDAE

Scoloplos rubra 2

SPIONIDAE

Paraprionospio pinnata 42

Polydora socialis 1

Prionospio cirrobranchiata 1

CHAETOPTERIDAE

Spiochaetopterus c. oculatus 8

MALDANIDAE

Maldane sarsi 1

STATION 4-12

914

Sediment Type: Sand

Weight Percentages — Granules: 0.0

Silts: 2.4

Date: July 26

Sands: 93.6
Clay: 3.9

Family and Species

Dredge Shovel Net

POLYNOIDAE

Polynoid A
Polynoid B

SIGALIONIDAE

Sthenelais boa

PHYLLODOCIDAE

Steone heteropoda
Phyllodoce arenae

HESICNIDAE

Gyptis vittata

PILARGIDAE

Cabira incerta

Siqambra bassi

NEREIDAE

Nereis succinea

NEPHTYIDAE

Aqlaophamus verrilli

Nephtys picta

GLYCERIDAE

Glycera americana

GONIADIDAE

Glycinde pacif ica

ORBINIIDAE

Scoloplos rubra

SPIONIDAE

Paraprionospio pinnata
Polydora socialis
Pseudopolydora sp.

CHAETOPTERIDAE

Spiochaetopterus c. oculatus

29

2 2

83
1

35

30

915

STATION 4-12 — (Continued)

Family and Species Dredge Shovel Net

MALDANIDAE

Branchioasychis americana 1

Kaldane sarsi 6

TERSBSLLIDAE

Loimia viridis 3

916

STATION 4-13

Sediment Type: Sand
Weight Percentages -

Date:

July 30

Granules:

0.0

Sands

: 88.9

Silts:

5.5

Clay:

5.7

Family and Species Dredge Shovel Net

POLYNOIDAE

Polynoid B 8

SIGALIONIDAE

Sthenelais boa 3 7

AMFHINOKIDAE

Pseudeurythoe ambigua 1

PHYLLODOCIDAE

Phyllodoce arenae 2 26

HSSIONIDAE

Gyptis vittata 13 2

Parahesione luteola 5

PILARGIDAE

Siqambra tentaculata 2

NEREIDAE

Nereis succinea 1 2

GLYCERIDAE

Glycera americana 25 1

GONIADIDAE

Glycinde pacif ica 23 9

ORBINIIDAE

Scoloplos rubra 1

SPIONIDAE

Paraprionospio pinnata 139 72

Prionospio cirrobranchiata 7

Pseudopolydora sp. 399

CHAETOPTERIDAE

Spiochaetopterus c. oculatus 8 1

917

STATION 4-13— (Continued)

Famlly and Species Dredge Shovel Net

MALDANIDAE

Maldane sarsi

PECTINARIIDAE

Cistenides gouldii

STATION 4-14

918

Sediment Type: Sand

Weight Percentages — Granules: 0.0

Silts: 1.6

Date: July 30

Sands: 93.6
Clay: 4.7

Family and Species

Dredge Shovel Net

POLYNOIDAE

Polynoid B

SIGALIONIDAE

Sthenelais boa

PHYLLODOCIDAE

Phyllodoce arenae

PILARGIDAE

Sigambra bassi

NEREIDAE

Nereis succinea

NEPHTYIDAE

Aqlaophamus verrilli

Nephtys picta

GLYCERIDAE

Glycera americana

GONIADIDAE

Glycinde pacif ica

CRBINIIDAE

Scoloplos rubra

SPIONIDAE

Paraprionospio pinnata
Prionospio cirrobranchiata
Pseudopclydora sp.

CHAETOPTSRIDAE

Spiochaetopterus c. oculatus

PECTINARIIDAE

Cistenides gouldii

TEREBELLIDAE

Loimia yiridis

3

13

13

75
3

16

41

23
2

919

STATION 4-15

Sediment Type: Sand Date: July 30

Weight Percentages — Granules: 0.2 Sands: 88.3

Silts: 5.2 Clay: 6.3

Family and Species Dredge Shovel Net

POLYNOIDAE

Polynoid B 6

SIGALIONIDAE

Sthenelais boa 2 3

PHYLLODOCIDAE

Phyllodoce arenae 7 5

HESIONIDAE

Gyptis vittata 2

Gyptis sp. 1

NEREIDAE

Nereis succinea 1

NEPHTYIDAE

Nephtys picta 3

GLYCERIDAE

Glycera americana 122 1

GCNIADIDAE

Glycinde pacif ica 4 15

ORBINIIDAS

Scoloplos rubra 1

SPIONIDAE

Paraprionospio pinnata 80 74

Prionospio cirrobranchiata 5

Pseudopolydora sp. 488

CHAETOPTERIDAE

Spiochaetopterus c. oculatus 46 4

MALDANIDAE

Haldane sarsi 2

920

STATION 4-16

Sediment Type: Sand Date: July 30

Weight Percentages — Granules: 0.2 Sands: 92.9

Silts: 3.4 Clay: 3.6

Family and Species Dredge Shovel Net

POLYNOIDAE

Polynoid A 2

Polynoid B 4 1

SIGALIONIDAE

Sthenelais boa 11

PHYLLODOCIDAE

Phyllodoce arenae 16 10

HESIONIDAE

Gyptis vittata 2

NERSIQAE

Nereis succinea 2 S

NEEHTYIDAE

Aglaophamus verrilli 18

Nephtys picta 2

GLYCERIDAE

Glycera americana 14

GONIADIDAE

Glycinde pacifica 8 3

ORBINIIDAE

Scoloplos rubra 1

SPIONIDAE

Acoprionospio pygmaea 2

7 :'.ra rionospji-' .;.ji^nara 75 23

Polydora socialis 1

Prionospio cirrobranchiata 1

Spio setosa 1

Pseudopolydora sp. 18

CHAET0PT3RIDAE

Spiochaetopterus c. oculatus 42 7

921

STATION 4-16— (Continued)

Family and Species

OPHELIIDAE

Travisia sp.

CAPITELLIDAE

Heteromastus f iliformis
Notomastus hemipodus

PECTINARIIDAE

Cistenides gouldii

TEREBELLIDAE

Loimia medusa

Dredge Shovel Net

16

Thelepus setosus

922

STATION 4-1 7-A

Sediment Type: Sand Date: July 30

Weight Percentages — Granules: 0.0 Sands: 96.5

Silts: 1.7 Clay: 1.8

Family and Species Dredge Shovel Net

POLYNOIDAE

Polynoid A 1

Polynoid B 1

SIGALIONIDAE

Sthenelais boa 3

PHYLLODOCIDAE

Paranaites speciosa 1

Phyllodoce arenae 7

NEFHTYIDAE

A.qlaophamus verrilli 8

Nephtys picta 9

GLYCSRIDAE

Glycera americana 17

GONIADIDAE

Glycinde pacif ica 9

ORBINIIDAE

Scoloplos rubra 1

SPIONIDAE

Paraprionospio pinnata 75

CHAETOPTERIDAE

Spiochaetopterus c. oculatus 128

OPHELIIDAE

Travisia sp. 4

CAFITELLIDAE

Notomastus hemipodus 1

PECTINARIIDAE

Cistenides qouldii 1

923

STATION 4-1 7-B

Sediment Type: Sand Date: July 30

Weight Percentages — Granules: 0.7 Sands: 94.8

Silts: 2.5 Clay: 2.1

Family and Species Dredge Shovel Net

No Polychaets Recorded

STATION 4-18-A

924

Sediment Type: Sand

VJeight Percentages — Granules: 0.0

Silts: 0.9

Date:

July 30

Sands

: 98.3

Clay:

0.7

Family and Species

Dredge Shovel Net

SIGALIONIDAE

Sthenelais boa

PHYLLODOCIDAE

Paranaites speclosa

Fhvllodoce arenae

NEREIDAE

Nereis succinea

NEPHTYIDAE

Aqlaophamus verrilli
Nephtys picta

GLYCERIDAE

Glycera americana

SPICNIDAE

Paraprionospio pinnata
rseudopolydora sp.

OPHELIIDAE

Travisia sp.

TSREBELLIDAE

Loimia yiridis

^9

925

STATION 4-18-B

Sediment Type: Sand Date: July 30

Weight Percentages — Granules: 0.0 Sands: 97.5

Silts: 1.7 Clay: 0.8

Family and Species Dredge Shovel Net

SPIONIDAE

Prionospio cirrobranchiata 1

STATION 4-19

926

Sediment Type: Sand

Weight Percentages — Granules: 2.6

Silts: 1.4

Date: July 31

Sands: 95.3
Clay:

0.6

Family and Species

Dredge Shovel Net

POLYNOIDAS

Polynoid A

SIGALIONIDAE

Sthenelais boa

PHYLLODOCIDAE

Phyllodoce arenae

HESIONIDAE

Gyptis vittata

SYLLIDAE

Syllis gracilis

NEREIDAE

Nereis succinea

NEPHTYIDAE

Nephtys picta

GLYCSRIDAE

Glycera americana

GONIADIDAE

Glycinde pacifica

ONUPHIDAE

Onuphis sp.

DORVILLEIDAE

Dorvillea rudolphi

ORBINIIDAE

ScoXoplos robustus

SPIONIDAE

Apoprionospio pyqmaea
Paraprionospio pinnata
Spiophanes bombyx
Pseudopolydora sp.

2
2

13
2

14

10
9

1

4

22

1
25

927

STATION 4-19 — (Continued)

Family and Species Dredge Shovel Net

POECILOCHAETIDAE

Poecilochaetus johnsoni 4

CHAETOPTERIDAE

Spiochaetopterus c. oculatus 3

OPHELIIDAE

Travisia sp. 4

CAPITELLIDAE

Notomastus hemipodus 15

PECTINARIIDAE

Cistenides qouldii

928

STATION 4-20

Sediment Type: Sand Date: July 31

Weight Percentages — Granules: 6.2 Sands: 93.7

Silts: 0.1 Clay: 0.0

Family and Species Dredge Shovel Net

ORBINIIDAE

Scoloplos rubra 1

SPIONIDAE

Paraprionospio pinnata

Scolelepis squamata 17

CAPITELLIDAE

Heteromastus f iliformis 3

929

STATION 5-1-A

Sediment Type: Silty Sand

Weight Percentages — Granules: 0.0

Silts: 15.8

Date: Aug. 1

Sands: 69.9
Clay: 14.3

Family and Species

Dredge Shovel Net

AMPHINCKIDAE

Pseudeurythoe ambiqua

PILARGIDAE

Sigambra tentaculata

NEREIDAE

Laeonereis culveri

Nereis p_. occidentalis
Nereis succinea

GLYCZRIDAE

Glycera americana

GONIADIDAE

Glycinde pacif ica

ONUPHIDAE

Diopatra cuprea

SFIONIDAE

Paraprionospio pinnata

NAGELONIDAE

Kagelona pettiboneae

930

STATION 5-1-B

Sediment Type: Sand Date: Aug. 1

Weight Percentages — Granules: 0.1 Sands: 94.8

Silts: 3.7 Clay: 1.4

Family and Species Dredge Shovel Net

ORBINTIDAE

Scoloplos rubra 1

SPICNIDAE

Paraprionospio pinnata 5 6

Polydora websteri 1

Prionospio cirrobranchiata 8 1

Streblospio benedicti 13

Pseudopolydora sp. 27

CHAETOPTERIDAS

Spiochaetopterus c. oculatus 2

931

STATION 5-2

Sediment Type: Sand Date: Aug. 1

Weight Percentages — Granules: 0.0 Sands: 93.0

Silts: 3.9 Clay: 3.2

Family and Species Dredge Shdvel Net

HESIONIDAE

Gyptis vittata 4

NEREIDAE

Nereis succinea 15 5

Platynereis dumerilii i

NEPHTYIDAE

Nephtys picta i

GLYCERIDAE

Glycera americana 13

GONIADIJAE

Glycinde pacif ica 6

ORBINIIDAE

Scoloplos robustus 2 1

Scoloplos rubra 9

SPIONIDAE

Apoprionospio pyqmaea 1

Paraprionospio pinna ta 5

Polydora socialis 3

l/olydora websteri 1

Prionospio h. texana 4

Streblospio benedicti 7

Pseudo polydora sp. 34

CHAETOPTSRIDAS

Spiochaetopterus c. oculatus 12

CAPITELLIDAE

Capitella capitata 11

STATION 5-3

932

Sediment Type: Sand

Weight Percentages — Granules: 0.0

Silts: 0.3

□ate: Aug. 1

Sands: 99.3
Clay: 0.4

Family and Species

Dredge Shovel Net

PHYLLODCCIDAE

Steone heteropoda
Phyllodoce arenae

HESIONIDAE

Gyptis vittata

NSREIDAE

Nereis succinea

NSPHTYIDAE

Nephtys picta

GLYCERIDAE

Glycera americana

GONIADIDAE

Glycinde pacif ica

ONUFHIDAE

Jiopatra cuprea
Onuphis sp.

ORBINIIDAE

Scoloplos robustus
Scolcplos rubra

PARAONIDAE

Aricidea sp.

SPIONIDAE

Apoprionospio pyqmaea
Paraprionospio pinnata
Folydora socialis
Prionospio cirrobranchiata
Pseudopolydora sp.

POSCILOCHAETIDAE

Poecilochaetus johnsoni

S

1

13

17

2
35

933

STATION 5-3 — (Continued)

Family and Species Dredge Shovel Net

CHAETOPTERIDAB

Spiochaetopterus c. oculatus 7

CAPITSLLIDAE

Capitella capitata 1

Hoteromastus f iliformis 5

PECTINARIIDAE

Cistenides gouldii 2

TSREBELLIDAE

Loimia medusa 2

934

STATION 5-4

Sediment Type: Sand
Weight Percentages -

Granules: 0.0
Silts: 0.3

Date: Aug. 1

Sands: 99.6
Clay: 0.1

Family and Species

Dredge Shovel Net

PHYLLODOCIDAE

Steone heteropoda

HESIONIDAE

Gyptis vittata

NSREIDAE

Nereis succinea

GLYCERIDAE

Glycera americana

GONIADIDAE

Glycinde pacif ica

ONUPHIDAE

Diopatra cuprea

ORBINIIDAE

Scoloplos robustus
Scoloplos rubra

PARAONIDAE

Aricidea fragilis

SPIONIDAE

Apoprionospio pyqmaea
Paraprionospio pinnata
Polydora websteri
Prionospio cirrobranchiata
Prionospio h. texana

MAGSLCNIDAE

Maqelona pettiboneae

CHAETOl-'TERIDAE

Spiochuetopteriis c. oculatus

19

17

13

3

1C

3

12
1
2

4

STATION 5-4 — (Continued)

935

Family and Species

Dredge Shovel Net

CAPITBLLIDAE

Capitelln capitata
Heteromastus filiforrnis
Notomastus latericeus

12
1

1

PECTINARIIDAE

Cistenides gouldii

SA3ELLIDAE

Sabella microphthalma

STATION 5-5

936

Sediment Type: Sand

Weight Percentages — Granules: 0.0

Silts: 0.3

Family and Species

Date:

Aug.

1

Sands
Clay:

: 99.

0.

.2
.5

Dredge Shovel Net

PHYLLODOCIDAE

Eteone heteropoda

NEREIDAE

Nereis succinea

NEPHTYIDAE

Aqlaophamus verrilli

GLYCSRIDAE

Glycera americana

GONIADIDAE

Glycinde pacif ica

ORBINIIDAE

Scoloplos rubra

SPIONIDAE

Apoprionospio pyqmaea
Paraprionospio pinnata
Spio setosa

KAGELONIDAS

Kaqelona pettiboneae

CHAETOPTERIDAE

Spiochaetopterus c. oculatus

OPHELIIDAS

Travisia sp.

17

156

937

STATION 5-6

Sediment Type: Sand

Weight Percentages — Granules: 0.0

Silts: 0.9

Date:

Sands
Clay:

Aug. 6

: 98.7
0.4

Family and Species

Dredge Shovel Net

SIGALIONIDAE

Sthenelais boa

PHYLLODOCIDAE

Phyllodoce arenae

HESICNIDAE

Gyptis vittata

GLYCERIDAE

Glycera americana

GONIADIDAE

Glycinde pacif ica

ONUPHIDAE

Onuphis sp.

ORBINIIDAE

Scoloplos rubra

SPIONIDAE

Apoprionospio pyqmaea
Paraprionospio pinnata
Prionospio cirrobranchiata

CHAETOPTERIDAE

Spiochaetopterus c. oculatus

OPHELIIDAE

Travisia sp.

TEREBELLIDAE

Loimia medusa

10

23

2

3
53

STATION 5-7

938

Sediment Type: Sand

Weight Percentages — Granules: 0.6

Silts: 0.1

Date: Aug. 6

Sands :
Clay:

99.1
0.2

Family and Species

Dredge Shovel Net

POLYGDONTIDAE

Polyodontes lupina

HESIONIDAE

Gyptis vittata

NEREIDAE

Nereis arenaceodentata

GLYCSRIDAE

Glycera americana

ORBINIIDAE

Scoloplos robustus

SPIONIDAE

Apoprionospio pygmaea
Paraprionospio pinnata
Spio setosa

OPHELIIDAE

Travisia sp.

TEREBELLIDAE

Loimia medusa

6
4

14

42

1

939

STATION 5-8
Sediment Type: Sand

Weight Percentages — Granules: 0.3

Silts: 0.3

Date: Aug. 6

Sands: 99.2
Clay: 0.3

Family and Species

POLYNOIDAE

Polynoid A

SIGALICNIDAE

Sthenelais boa

Dredge Shovel Net

PHYLLODCCIDAE

Phyllodoce arenae

GLYCERIDAS

Glycera americana

ONUPHIDAE

Onuphis sp.

SPIONIDAE

Apoprionospio pyqmaea
Paraprionospio pinnata
Prionospio cirrobranchiata
Spio setosa

OPHELIIDAE

Travisia sp.

107

940

STATION 5-9

Sediment Type: Sand Date: Aug. 6

Weight Percentages — Granules: 0.0 Sands: 100.0

Silts: 0.0 Clay: 0.0

Family and Species Dredge Shovel Net

HESIOWIDAE

Gyptis vittata 1

SPIONIDAE

Paraprionospio pinnata 3

Prionospio cirrobranchiata 1

Spio setosa 6

OPHSLIIDAE

Travisia sp. 135

941

STATION 5-10

Sediment Type: Sand
Weight Percentages -

Date : Aug . 6

Granules: 0.0
Silts: 0.2

Sands:
Clay:

99.5
0.3

Family and Species

Dredge Shovel Net

POLYNOIDAE

Polynoid A

NEPHTYIDAE

Aqlaophamus verrilli

OPHELIIDAE

Travisia sp.

CAPITELLIDAE

Heteromastus f iliformis

14

942

STATION 5-11

Sediment Type: Sand Date: Aug. 6

Weight Percentages — Granules: 0.0 Sands: 98.9

Silts: 0.6 Clay: 0.5

Family and Species Dredge Shovel Net

SIGALIONIDAE

Sthenelais boa 1

PHYLLCDCCIDAE

Phyllodoce arenae 3

NEREIDAE

Nereis succinea 1

GLYCERIDAE

Glycera americana 1

SPICNIDAE

Apoprionospio pyqmaea 6

Paraprionospio pinnata 2

Prionospio cirrobranchiata 1

Spio setosa 4

CHAETOPTERIDAE

Spiochaetopterus c. oculatus 1

OPHELIIDAE

Travisia sp. 95

TERE3ELLIDAE

Loimia medusa 7

943

STATION 5-12

Sediment Type: Sand Date: Aug. 6

Weight Percentages — Granules: 0.0 Sands: 99.8

Silts: 0.1 Clay: 0.1

Family and Species Dredge Shovel Net

SIGALIONIDAE

Sthenelais boa 3

FHYLLODOCIDAE

Phyllodoce arenae 11 10

HESIONIDAE

Gyptis vittata 2

NEREIDAE

Nereis succinea 3

SPIONIDAE

Paraprionospio pinnata 14 2

L'dyjofj socialis 1

i- rioncsiiio cirrobranchiata 13
Spio setosa 1

OPHELIIDAE

Travisia sp. 38

TEREBELLIDAE

Loimia medusa 7

Polycirrus eximius 1

944

Sediment Type: Sand

STATION 5-13

Date:

Aug. 6

- Granules: 0.5

Sands

: 98.9

Silts: 0.3

Clay:

0.2

Family and Species Dredge Shovel Net

PHYLLODOCIDAE

Phyllodoce arenae 5

Fhyllodoce fragilis 1

GLYCERIDAE

Glycera americana 1

ONUPHIDAE

Onuphis sp. 3

ORBINIIDAE

Scoloplos rubra 1

SPIONIDAE

Apoprionospio pyqmaea 2

Paraprionospio pinnata 9

Parionospio cirrobranchiata 1

Spio setosa ~ 5

OPHELIIDAE

Travisia sp. 47

CAFITSLLIDAE

Heteromastus f ilif ormis 4

Notomastus hemipodus 1

TERS3ELLIDAE

Loimia yiridis 2

STATION 6-1-A

945

Sediment Type: Sandy Clay
Weight Percentages

Granules :
Silts:

0.1
9.6

Date: Aug. 7

Sands:
Clay:

24.5
65.9

Family and Species

Dredge Shovel Net

CHRYSOPETALIDAE

Paleanotus heteroseta

AKPHINOMIDAE

Pseudeurythoe ambiqua

PHYLLCDOCIDAE

Phyllodoce arenae

HESIONIDAE

Gyptis vittata

SYLLIDAE

Exoqone dispar

NEREIDAE

Laeonereis culveri

Nereis succinea

F latynereis dumerilii

GLYCERIDAE

Glycera americana

GONIADIDAE

Glycinde pacif ica

ONUPHIDAE

Diopatra cuprea
Onuphis sp.

DORVILLEIDAE

Dorvillea rudolphi

ORBINIIDAE

Scoloplos robustus
Scoloplos rubra

PARAONIDAE

Aricidea sp.

12

946

STATION 6-1-A— (Continued)

Family and Species Dredge Shovel Net

SPIONIDAE

Paraprionospio pinnata 1

Polydora socialis 3

Polydora websteri 2

Frionospio h. texana 2

CHAETOPTERIDAE

Spiochaetopterus c. oculatus 7

OPHELIIDAE

Travisia sp. 8

CAPITSLLIDAE

Notomastus hemipodus 16

MALDANIDAE

Clymenella mucosa 2

PECTINARIIDAE

Cistenides gouldil 6

TEREBELLIDAE

Loimia viridis 1

947

STATION 6-1-B

Sediment Type: Sand
Weight Percentages -

Granules:
Silts:

0.0
0.8

Date: Aug. 7

Sands:
Clay:

98.5
0.7

Family and Species

Dredge Shovel Net

HESIONIDAE

Gyptis vittata

GLYCERIDAE

Glycera americana

GONIADIDAE

Glycinde pacif ica

ORBINIIDAE

Scoloplos rubra

PARAONIDAE

Aricidea sp.

SPIONIDAE

Folydora socialis
Prionospio h. texana
Spio setosa

CHAETOPTERIDAE

Spiochaetopterus c. oculatus

OPHELIIDAE

Travisia sp.

CAP1TELLIDAE

Capitella capitata
Notomastus hemipodus

AR5NIC0LIDAE

Arenicola cristata

9

55

STATION 6-1-C

948

Sediment Type: Sand

Weight Percentages — Granules: 0.3

Silts: 1.9

Date: Aug. 7

Sands:
Clay:

95.3
2.5

Family and Species

Dredge Shovel Net

PHYLLODOCIDAE

Sumida sanquinea

HSSIONIQAE

Gyptis sp.

SYLLID'iE

Brania clavata

NEREIDAE

Nereis succinea
Platynereis dumerilii

GLYCERIDAE

Glycera americana

ONUPHIDAE

Diopatra cuprea
Onuphis sp.

ARABELLIDAE

Arabella iricolor

1

1

21

•1
31

ORBINIIDAS

Orbinia ornata
Scoloplos robustus
Scoloplos rubra

SPIONIDAE

Paraprionospio pinnata
Polydora websteri
Prionospio h. texana

KAGELONIDAE

Maqelona pettiboneae

CHAETOPTERIDAE

Spiochaetopterus c. oculatus

CIRRATULIDAE

Tharyx sp. C

1
17

20

949

STATION 6-1-C— (Continued)

Family and Species

Dredge Shovel Net

OPHELIIDAE

Travisia sp.

CAFITELLIDAE

Capitella capitata

HALDANIDAE

Clymenella mucosa

PECTINARIIDAE

Cistenides gouldii

28

55

31

1

950

STATION 6-1-D

Sediment Type: Sand
Weight Percentages -

Granules: 0.0
Silts: 0.3

Date: Aug. 7

Sands: 98.8
Clay! 0.9

Family and Species

Dredge Shovel Net

AMPHINOKIDAE

Pseudeurythoe ambiqua

PHYLLODOCIDAE

Phyllodoce fraqilis

SYLLIDAE

Syllis vittata

NEREIDAE

Laeonereis culveri
Nereis succinea
Perinereis f loridana

GLYCERIDAE

Glycera americana

GONIADIDAE

Glycinde pacif ica

0NUPHIDAE

Onuphis sp.

EUNICIDAE

Marphysa sanquinea

ORBINIIDAE

Scoloplos robustus
Scoloplos rubra

PARAONIDAE

Aricidea fraqilis
Aricidea taylori
Aricidea sp.

SPIONIDAE

Polydora websteri
Scolelepis sguam'ata

3
2

35

6

74
1

4 0
1

951

STATION 6-1-D — (Continued)

Family and Species

Dredge Shovel Net

HAGELONIDAE

K.agelona pettiboneae

CAPITELLIDAE

Heteromastus filiformis

20
4

STATION 6-2

952

Sediment Type: Sand

Weight Percentages — Granules: 6.4

Silts: 0.0

Date: Aug. 7

Sands: 93.6
Clay: 0.0

Family and Species

Dredge Shovel Net

CHRYSOFETALIDAE

Paleanotus heteroseta

AMFHINOKIDAE

Pseudeurythoe ambiqua

PHYLLODOCIDAE

Eumida sanquinea
Phyllodoce arenae

HESIONIDAE

Gyptis vittata

SYLLIDAE

Autolytus cornutus
Exogone dispar
Syllis sp. B

NEREIDAE

Nereis succinea

GLYCSRIDAE

Glycera americana

GONIADIDAE

Glycinde pacif ica
Goniadella sp.

ONUPHIDAE

Onuphis sp.

EUNICIDAE

I'iarphysa sanquinea

LUMBRINERIDAE

Lumbrineris latreilli

ARABELLIDAE

Arabella iricolor

1

332

15

325
2

16
3

22

1

23

I
13

63

DORVILLEIDAE

Dorvillea rudolphi
Dorvillea sp.

953

STATION 6-2 — (Continued)

Family and Species Dredge Shovel Net

ORBINIIDAE

Scoloplos robustus 1

PARAONIDAE

Aricidea sp. 12

SPIONIDAE

Paraprionospio pinnata 2

Polydora socialis 3

Folyciora websteri 1

Pseudopolydora sp. 18

POECILOCHAETIDAE

Poecilochaetus johnsoni 24

CHAETOFTERIDAE

Spiochaetopterus c. oculatus 3

CIRRATULIDAE

Cirratulus sp. D 1

Cirriformia sp. A 1

OPHELIIDAE

Travisia sp. 18

CAPITELLIDAE

Capitella capitata 4

Heteromastus filiformls 78

MALDANIDAE

Clymenella mucosa

TSREBELLIDAE

Loimia medusa 3

Polycirrus eximius 14

SABELLIDAE

Fabricia sabella

954

STATION 6-3

Sediment Type: -

Weight Percentages — Granules:

Silts:

Date: Aug. 7

Sands: -
Clay: -

Family and Species

CHRYSOPETALIDAE

Paleanotus heteroseta

Dredge Shovel Net

PHYLLCDOCIDAE

Eumida sanquinea
Phyllodoce arenae

SYLLIDAE

Autolytus cornutus
3rania clavata
Sxogone dispar
Sphaerosyllis sp.
jyliis sp. 3

NEREIDAE

Nereis succinea
Platynereis dumerilii

GLYCERIDAE

Glycera americana

GONIADIDAE

Goniadella sp.

ONUPHIDAE

Onuphis sp.

ARABELLIDAE

Arabella iricolor

SPI0N1DAE

Polydora socialis
Polydora websteri
Spio setosa

POECILOCHAETIDAE

Poecilochaetus johnsoni

OPHELIIDAE

Travisia sp.

1
12

321

9

1
6

15
71

2

21

2

91
1

200

10
1

955

STATION 6-3 — (Continued)

Family and Species Dredge Shovel Net

CAPITELLIDAE

Heteromastus f iliformis 7

TEREBSLLIDAE

Polycirrus eximius

STATION 6-4-A

956

Sediment Type: Sand

Weight Percentages — Granules: 0.0

Silts: 0.2

Date: Aug. 8

Sands:
Clay:

99.4
0.4

Family and Species

Dredge Shovel Net

SIGALIONIDAE

Sthenelais boa

PHYLLODOCIDAE

Paranaites speciosa
Phyllodoce arenae

SYLLIDAE

Exoqone dispar

NEREIDAE

Nereis £. occidentalis
Nereis succinea
Platynereis dumerilii

GLYCERIDAE

Glycera americana

SONIADIDAE

Glycinde pacif ica

ONUPHIDAE

Diopatra cuprea

Cnuphis s p .

ORBINIIDAE

Scoloplos robustus

SPIONIDAE

Apoprionospio pyqmaea
Paraprionospio pinnata
Polydora socialis
Polydora websteri
Prionospio cirrobranchiata
Prionospio h. texana
Scolelepis squamata

CHAETOPTERIDAE

Spiochaetopterus c. oculatus

24

15

27

2

1

7

1

10

957

STATION 6-4-A— (Continued)

Family and Species Dredge Shovel Net

OPHELIIDAE

Travisia sp. 6

CAPITELLIDAE

Capitella capitata 4

TEREBELLIDAE

Loimia medusa 2

958

STATION 6-4-B

Sediment Type: Sand Date: Aug. 8

Weight Percentages — Granules: 0.0 Sands: 97.4

Silts: 1.3 Clay: 1.2

Family and Species Dredge Shovel Net

No Polychaetes Recorded

STATION 6-5

959

Sediment Type: Sand

Weight Percentages — Granules: 0.1

Silts: 0.4

Date: Aug. 8

Sands: 99.1
Clay: 0.4

Family and Species

Dredge Shovel Net

SIGALIONIDAE

Sthenelais boa

PHYLLODOCIDAE

Phyllodoce arenae

HESIONIDAE

Gyptis vittata

SYLLIDA.E

Sxoqone dispar

NERSIDAE

Nereis succinea

GONIADIDAE

Glycinde pacif ica

0R3INIIDAE

Scoloplos robustus

SPIONIDAE

Paraprionosplo plnnata
j olydora socialis
Prionospio cirrobranchiata
Spio setosa

OPHELIIDAE

Travisia sp.

CAPITELLIDAE

Capitella capitata
Heteromastus filiformls

TEREBELLIDAE

Loimia medusa
Polycirrus eximius

11
11
6
3
5
1

4

1

24

25

162

960

STATION 6-6

Sediment Type: Sand

Weight Percentages — Granules: 0.3

Silts: 0.0

8

Date: Aug

Sands: 99.9
Clay: 0.1

Family and Species

Dredge Shovel Net

SIGALIONIDAE

Sthenelais boa 4

PHYLLODOCIDAE

Phyllodoce arenae 2

HESIONIDAE

Gyptis vittata 1

NEFHTYIDAE

Aglaophamus verrilli 1

0NUPHIDAE

Diopatra cuprea

SPIONIDAE

Apoprionospio pyqmaea 1

Paraprionospio pinnata 2

Prionosplo cirrobranchiata 14

Spio setosa 6

CHAETCPTERIDAE

Spiochaetopterus c. oculatus

OPHELIIDAE

Travisia sp. 91

TEREBELLIDAE

Loimia medusa 1

10

I
3

961

STATION 6-7-A

Sediment Type: Sand Date: Aug. 8

Weight Percentages — Granules: 2.5 Sands: 96.2

Silts: 0.8 „ Clay: 0.5

Family and Species Dredge Shovel Net

HSSIONIDAE

Gyptis vittata 1

NEREIDAE

Nereis p_. occidentalis 1

GLYCERIDAE

Glycera americana 8

ONUPHIDAE

Dlopatra cuprea 18

Onuphis sp. 19

ARABELLIDAE

Drionereis magna 1

ORBINIIDAE

Scoloplos robustus 7

Scoloplos rubra 12

PARACNIDAE

Aricidea fragilis 18

Aricidea taylori 1

SPIONIDAE

Polydora socialis 1

Frionospio h. texana 4

Spiophanes bombyx 1

Pseudopolydora sp. 4

MAGELONIDAE

Maqelona pettiboneae 4

CHAETOPTERIDAE

Spiochaetopterus c. oculatus 2

CIRRATULIDAE

Tharyx sp. C 2

OPHELIIDAE

Travisia sp. 11

962

STATION 6-7-A — (Continued)

Family and Species

Dredge Shovel Net

CAPITELLIDAE

Capitella capitata

KALDANIDAE

Clymenella mucosa

PECTINARIIDAE

Cistenides gouldii

963

STATION 6-7-B

Sediment Type: Sand Date: Aug. 8

Weight Percentages — Granules: 0.4 Sands: 96.4

Silts: 1.8 Clay: 1.4

Family and Species Dredge Shovel Net

No Polychaetes Recorded

STATION 6-8

964

Sediment Type: Sand
Weight Percentages -

Granules:
Silts:

0.26
0.1

Date: Aug. 8

Sands: 99.7
Clay: 0.0

Family and Species

Dredge Shovel Net

PHYLLODOCIDAE

Eteone heteropoda

NEREIDAE

Laeonereis culveri
Nereis succinea

ORBINIIDAE

Scoloplos robustus

SPIONIDAE

Prionospio h. texana
Scolelepis squamata

CAPITELLIDAE

Capitella capitata
Heteromastus f iliformis

STATION 7-1

965

Sediment Type: Sand

Weight Percentages — Granules: 0.5

Silts: 2.8

Date: Aug. 19

Sands: 95.2
Clay: 1.5

Family and Species

Dredge Shovel Net

HESIONIDAE

Gyptis vittata
Parahesione luteola

32

NEREIDAE

Nereis succinea

SPIONIDAE

Paraprlonospio pinnata
Polydora websteri
Streblospio benedict!

CHAETOPTERIDAE

Spiochaetopterus c. oculatus

8
968

2

1
10

966

STATION 7-2

Sediment Type: Silty Mud Date: Aug. 19

Weight Percentages — Granules: 0.1 Sands: 37.3

Silts: 36.0 Clay: 26.7

Family and Species Dredge Shovel Net

SPIONIDAE

Streblospio benedicti 12

CHAETOPTERIDAE

Spiochaetopterus c. oculatus 1

967

STATION 7-3

Sediment Type: - Date: Aug. 19

Weight Percentages — Granules: - Sands: -

Silts: - Clay: -

Family and Species Dredge Shovel Net

SYLLIDAE

Exoqone dispar . . 1

NEREIDAE

Nereis succinea 1

ONUPHIDAE

Diopatra cuprea 1

SPIONIDAE

Paraprionospio pinnata 1

Polydora websteri 6 24

Streblospio benedicti 302 1

CHAETOPTERIDAE

Spiochaetopterus c. oculatus 2

968

STATION 8-1

Sediment Type: Silty Mud Date: Aug. 19

Weight Percentages — Granules: 0.7 Sands: 37.0

Silts: 38.4 Clay: 24.0

Family and Species Dredge Shovel Net

SPIONIDAE

Paraprionospio pinnata 24

CHAETOPTERIDAE

Spiochaetopterus c. oculatus 1

969

STATION 8-2

Sediment Type: Sand Date: Aug. 19

Weight Percentages — Granules: 0.3 Sands: 94.8

Silts: 2.8 Clay: 2.1

Family and Species Dredge Shovel Net

HESIONIDAE

Parahesione luteola 1 15

NEREIDAE

Nereis succinea 47

GONIADIDAE

Glycinde pacifica 1

SPIONIDAE

Paraprionospio pinnata 11 18

Poiydora websteri 1

Streblospio benedicti 6 10

CHAETOPTERIDAE

Spiochaetopterus c. oculatus 4 1

CAPITELLIDAE

Capitella capltata 1

970

STATION 8-3

Sediment Type: Silty Sand Date: Aug. 20

Weight Percentages — Granules: 0.4 Sands: 69.0

Silts: 22.3 Clay: 8.3

Family and Species Dredge Shovel Net

HESIONIDAE

Parahesione luteola 1

NEREIDAE

Nereis succinea 2

SPIONIDAE

Paraprionospio pinnata 5 5

Streblospio benedicti 2 10

CHAETOPTERIDAE

Spiochaetopterus c. oculatus 8

971

STATION 8-4

Sediment Type: Sandy Mud

Weight Percentages — Granules: 0.9

Silts: 28.3

Date: Aug. 20

Sands: 46.9
Clay: 23.9

Family and Species

Dredge Shovel Net

HESIONIDAE

Parahesione luteola

NEREIDAE

Platynereis dumerilii

SPIONIDAE

Paraprionospio plnnata
Streblospio benedicti

1
10

972

STATION 8-5

Sediment Type: Silty Clay Date: Aug. 20

Weight Percentages — Granules: 0.0 Sands: 10.1

Silts: 36.3 Clay: 53.6

Family and Species Dredge Shovel Net

HESIONIDAE

Parahesione luteola 2

Gyptis sp. 1 1

SPIONIDAE

Paraprionosplo pinnata 1

97 3

STATION 8-6

Sediment Type: Shelly Sand

Weight Percentages — Granules: 72.9

Silts:

0.0

Date: Aug. 20

Sands:
Clay:

27.1
0.0

Family and Species

Dredge Shovel Net

PHYLLODOCIDAE

Steone heteropoda

SYLLIDAE

Syllis aciculata

NEREIDAE

Nereis succinea

SPIONIDAE

Polydora websteri

CAPITELLIDAE

Capitella capitata

5
6

142
6S

310

974

STATION 8-7

Sediment Type: Clayey Sand Date: Aug. 20

Weight Percentages — Granules: 0.3 n Sands: 61.5

Silts: 14.0° Clay: 24.2

Family and Species Dredge Shovel Net

HSSIONIDAE

Parahesione luteola 1 12

NEREIDAE

Nereis succinea 7

SPIONIDAE

Paraprionospio pinnata 2

Streblospio benedlcti 10

STATION 8-8

975

Sediment Type: Sand
Weight Percentages -

Granules:
Silts:

0.3

3.0

Date: Aug. 20

Sands: 93.7
Clay: 3.0

Family and Species

Dredge Shovel Net

PHYLLODOCIDAE

Steone heteropoda

HESIONIDAE

Gyptis vittata
Parahesione luteola

NEREIDAE

Nereis succinea

GONXADIDAE

Glycinda pacif lea

SPIONIDAE

Paraprionospio pinnata
Polydora websteri
Streblospio benedicti

CHAETOPTERIDAE

Spiochaetopterus c. oculatus

CAPITELLIDAE

Capitella capitata
Capitellides jonesi

10

6
37

42
6

2
63

1

976

STATION 8-9

Sediment Type: Sand Date: Aug. 20

Weight Percentages — Granules: 0.0 Sands: 99.9

Silts: 0.1 Clay: 0.0

Family and Species Dredge Shovel Net

PHYLLODOCIDAE

Eteone heteropoda 18 6

HESIONIDAE

Parahesione luteola 1

NEREIDAE

Laeoneris culveri 6

Nereis succinea 27 21

ONUPHIDAE

Diopatra cuprea 5

DORVILLSIDAE

Dorvillea sp. 1

ORBINIIDAE

Scoloplos robustus 6 1

SPIONIDAE

Paraprionospio pinna ta 3

Polydora websteri 596 89

Streblospio benedicti 1044 10

CHAETOPTERIDAE

Spiochaetopterus c. oculatus 1 1

CAPITELLIDAE

Capitella capltata 422 25

Capitellldes j one si 1

STATION 8-10

977

Sediment Type: Sand

Weight Percentages — Granules: 0.2

Silts: 2.9

Date: Aug. 20

Sands: 95.0
Clay: 1.9

Family and Species

Dredge Shovel Net

NEREIDAE

Laeonereis culveri

SPIONIDAE

Polydora socialis
Polydora websteri
Streblospio benedlctl

CAPITELLIDAE

Capitella capitata

1
36

30

978

Sediment Type: Sand
Weight Percentages -

STATION 9-1

Date:

Aug. 21

- Granules:

0.0

Sands

: 98.4

Silts:

1.1

Clay:

0.5

Family and Species

Dredge Shovel Net

NEREIDAE

Laeonereis culveri

GONIADIDAE

Glycinde pacif ica

ORBINIIDAE

Scoloplos robustus

SPIONIDAE

Polydora websteri
Scolelepis squamata

CAPITELLIDAE

Capitomastus aciculatus

117

2
30

23

2

10

979

STATION 9-2

Sediment Type: Sandy Mud Date: Aug. 21

Weight Percentages — Granules: 5.3 Sands: 42.4

Silts: 24.3 Clay: 28.0

Family and Species Dredge Shovel Net

HESICNIDAE

Parahesione luteola 4

NEREIDAE

Nereis succinea 37

PARAONIDAE

Aricidea fraqilis 1

SPIONIDAE

Paraprionospio pinnata 14

Streblospio benedicti 10

980

STATION 9-3

Sediment Type: Sand

Weight Percentages — Granules:

Silts:

Date: Aug. 21

0.1
0.7

Sands:
Clay:

98.8
0.4

Family and Species

Dredge Shovel Net

PHYLLODOCIDAE

Phyllodoce arenae

HESIONIDAE

Parahesione luteola 6

NEREIDAE

Nereis succinea 40

GLYCERIDAE

Glycera americana 7

GONIADIDAE

Glycinde pacifica 31

ONUPHIDAE

Diopatra cuprea 3

0RBINIIDAE

Scoloplos rubra 2

SPIONIDAE

Paraprionospio pinnata 64

Polydora websteri 76

Streblospio benedicti 50

Pseudo polydora sp. 1

CHAETOPTERIDAE

Spiochaetopterus c. oculatus 150

CAPITELLIDAE

Capitellides jonesi

PECTINARIIDAE

Clstenides qouldii 27

2
11

141

4
10

1
112

10

981

STATION 9-4

Sediment Type: Sand Date: Aug. 21

Weight Percentages — Granules: 0.6 Sands: 99.3

Silts: 0.1 Clay: 0.0

Family and Species Dredge Shovel Net

AMPHINOKIDAE

Pseudeurythoe ambiqua 1

PHYLLODOCIDAE

Phyllodoce arenae 3 5

HESIONIDAE

Gyptis vittata 2

Parahesione luteola 4 13

NEREIDAE

Nereis succinea 27 18

GLYCERIDAE

Glycera americana 3

GONIADIDAE

Glycinde pacif ica 16 8

ONUPHIDAE

Diopatra cuprea 22

Onuphis sp. 1

SPIONIDAE

Paraprionospio pinnata 31 9

Polydora websteri 5 18

Strablospio benedicti 10 10

CKAETOPTERIDAE

Spiochaetopterus c. oculatus 60 1

CAPITELLIDAE

Capitellides jonesi 1

PECTINARIIDAE

Cistenides qouldii 1

982

STATION 9-5

Sediment Type: Silty Clay Date: Aug. 21

Weight Percentages — Granules: 0.4 Sands: 4.2

Silts: 42.1 Clay: 53.3

Family and Species Dredge Shovel Net

SPIONIDAE

Paraprionospio pinnata 1

983

STATION 9-6

Sediment Type: Silty Clay Date: Aug. 21

Weight Percentages — Granules: 0.2 Sands: 14.0

Silts: 42.3 Clay: 43.5

Family and Species Dredge Shovel Net

PHYLLODOCIDAE

Phyllodoce arenae 2

HESIONIDAE

Parahesione luteola 13

GONIADIDAE

Glycinde pacifica 1

SPIONIDAE

Paraprionospio pinnata 26

CHAETOPTERIDAE

Spiochaetopterus c. oculatus 1

STATION 9-7

984

Sediment Type: Silty Clay
Weight Percentages

:iay

Date: Aug. 21

Granules:

0.4

Sands: 3.5

Silts:

35.5

Clay: 60.8

Family and Species

Dredge Shovel Net

HESIONIDAE

Parahesione luteola

NEREIDAE

Nereis succinea

SPIONIDAE

Paraprionospio plnnata
Streblospio benedicti

8
10

985

STATION 9-8

Sediment Type: Silty Sand

Weight Percentages — Granules: 0.4

Silts: 17.0

Date: Aug. 22

Sands: 68.0
Clay: 14.5

Family and Species

Dredge Shovel Net

AMP HI NOM I DAE

Pseudeurythoe ambigua

HESIONIDAE

Parahesione luteola

NEREIDAE

Nereis succinea

SPIONIDAE

Paraprionospio pinnata
Polydora websteri
Streblospio benedictl

CAPITELLIDAE

Capltella capitata

3
3

10

STATION 9-9

986

Sediment Type: Sand
Weight Percentages -

Granules: 0.0
Silts: 7.0

Date: Aug. 22

Sands: 87.7
Clay: 5.3

Family and Species

HESIONIDAE

Parahesione luteola

NEREIDAE

Nereis succinea
Nicon lackeyi

GONIADIDAE

Glycinde pacifica

SPIONIDAE

Polydora websteri
Streblospio benedicti

CAPITELLIDAE

Capitellides jonesi

Dredge shovel Net

5

42

11
2

48

10

987

STATION 9T10

Sediment Type: Sand Date: Aug. 2 7

Weight Percentages — Granules: 0.1 Sands: 94.1

Silts: 4.4 Clay: 1.4

Family and Species Dredge Shovel Net

No Polychaetes Recorded

988

STATION 10-0

Sediment Type: Sand
Weight Percentages -

Granules:
Silts:

1.2
6.3

Date: Aug. 28

Sands:
Clay:

90.8
1.7

Family and Species

Dredge Shovel Net

PHYLLODOCIDAE

Steone heteropoda

NEREIDAE

Nereis succinea

ONUPHIDAE

Onuphis sp.

PARAONIDAE

Aricidea f raqilis
Aricidea sp.

SP ION I DAE

Scolelepis squama ta

CAPITELLIDAE

Capitella capita ta
Heteromastus f ilif ormis

ARENICOLIDAE

Arenicola cristata

MALDANIDAE

Clymenella mucosa

129

STATION 10-1-A

989

Sediment Type: Sand

Weight Percentages — Granules: 0.1

Silts: 0.0

Date: Aug. 27

Sands: 99.9
Clay: 0.0

Family and Species

Dredge Shovel Net

POLYNOIDAE

Harmothoe lunulata

HESIONIDAE

Gyptis vittata

PILARGIDAE

Cabira incerta

SYLLIDAE

Brania sp.

NEREIDAE

Nereis p_. occidentalis
Nereis succinea
Platynereis dumerilii

ONUPHIDAS

Diopatra cuprea
Onuphis sp.

ARABELL1DAE

Drilonereis cylindrlca

ORBINIIDAE

Scoloplos robustus

SPIONIDAE

Polydora socialis

Polydora websteri

MAGELONIDAE

Kaqelona pettiboneae

CHAETOPTSRIDAE

Spiochaetopterus c. oculatus

OPHELIIDAE

Travlsia sp.

13
4
1

12
213

41

990

STATION 10-1-A— (Continued)

Family and Species

Dredge Shovel Net

CAPITELLIDAE

Capitellides jonesi
Heteromastus f iliformis

MALDANIDAE

Clymenella mucosa

TEREBELLIDAE

Thelepus setosus

25

1

991

STATION 10-1-B

Sediment Type: Sand Date: Aug. 27

Weight Percentages — Granules: 0.6 Sands: 99.4

Silts: 0.0 Clay: 0.0

Family and Species Dredge Shovel Net

No Polychaetes Recorded

STATION 10-2

992

Sediment Type: Sand

Weight Percentages — Granules: 0.4

Silts: 0.1

Date: Aug. 2 7

Sands: 99.2
Clay: 0.2

Family and Species

Dredge Shovel Net

HESICNIDAE

Gyptis vittata

NSREIDAE

Nereis arenaceodentata
Nereis p_. occidentalis
Platynereis dumerilii

ORBINIIDAE

Scoloplos robustus

SPIONIDAE

Polydora socialis
Spio setosa

OPHELilDAE

Travisia sp.

993

STATION 10-3

Sediment Type: Shelly Sand

Weight Percentages — Granules: 21.5

Silts: 0.0

Date: Aug

Sands: 78.5
Clay: 0.0

27

Family and Species

Dredge Shovel Net

SIGALIONIDAE

Sthenelais boa

CHRYSOPETALIDAE

Paleanotus heteroseta

AMPHINOMIDAE

Pseudeurythoe amblqua

PHYLLODOCIDAE

Phyllodoce arenae

HESIGNIDAE

Gyptis vittata

SYLLIDAE

Exoqone dispar
Brania sp.
Syllis sp. B

NEREIDAE

Nereis £. occidentalis
Nereis succinea

GLYCERIDAE

Glycera americana

ONUPHIDAE

Onuphis sp.

ARABELLIDAE

Arabella iricolor

SPIONIDAE

Polydora socialis
Spio setosa

MAGELONIDAE

Maqelona pettlboneae

CHAETOPTERIDAE

Splochaetopterus c. oculatus

1
3
1
2
6

24

23

4
25

2

15

43
39

994

STATION 10-3— (Continued)

Family and Species Dredge

CIRRATULIDAE

Cirriformia sp. B

OPHELIIDAE

Travisia sp.

CAPITELLIDAE

Heteromastus f iliformis

TEREBELLIDAE

Snoplobranchus sanguineus 1

Loimia medusa

Polycirrus eximius 1

Thelepus setosus 1

Shovel

Net

4

32

18

STATION 10-4

995

Sediment Type: Sand

Weight Percentages — Granules: 3.2

Silts: 0.6

Date: Aug

Sands: 96.0
Clay: 0.2

21

Family and Species

Dredge Shovel Net

SIGALIONIDAE

Sthenelais boa

PHYLLODOCIDAE

Eteone heteropoda
Sumida sanquinea
Phllodoce arenae

HESIONIDAE

Gyptis vittata

SYLLIDAE

Brania clavata
Exogone dispar
Brania sp.
Syllls sp. B

NEREIDAE

Nereis p_. occidantalis
Nereis succinea
Platynereis dumerilii

NEPHTYIDAE

Aglaophamus verrilli
Nephtys . picta

GLYCERIDAE

Glycera americana

GONIADIDAE

Glycinde paclf ica

ONUPHIDAE

Diopatra cuprea
Onuphis sp.

ORBINIIDAE

Scoloplos rubra

SPIONIDAE

Prionospio clrrobranchiata

17

2
13

2

480

2

2

21

1

52

1
106

4

16

6
46

1
25

1

STATION 10-4 — (Continued)

996

Family and Species

Dredge Shovel Net

MAGELONIDAE

Maqelona pettiboneae

CHAETCPTSRIDAE

Chaetopterus variopedatus
Spiochaetopterus c. oculatus

CIRRATULIDAE

Cirratulus sp. D
Tharyx sp. C

OPHELIIDAE

Travisia sp.

CAPITELLIDAE

Heteromastus f iliformis

Notomastus hemipodus

OWENIIDAS

Owenia f usif ormis

PECTINARIIDAE

Cistenides qouldil

AMPHARETIDAE

Isolda pulchella

TEREBELLIDAE

Loimla medusa

SABELLIDAE

Fabricia sabella

58

17
1

3
3

3

2
50

997

STATION 10-5

Sediment Type: Sand

Weight Percentages — Granules: 0.0

Silts: 1.3

Date: Aug. 28

Sands: 98.5
Clay: 0.2

Family and Species

Dredge Shovel Net

NEREIDAE

Nereis £. occidentalis
Nereis succinea

GONIADIDAE

Glycinde pacif ica

ONUPHIDAE

Diopatra cuprea

SPIONIDAE

Apoprionospio pyqmaea

OPHELIIDAE

Travisla sp.

STATION 10-6

998

Sediment Type: Sand

Weight Percentages — Granules: 0.4

Silts: 0.3

Date: Aug. 28

Sands: 99.2
Clay: 0.1

Family and Species

Dredge Shovel Net

SIGALIONDAE

Sthenelais boa 4

PHYLLODOCIDAE

Phyllodoce arenae 3

HESIONIDAE

Gyptis vlttata 1

NEREIDAE

Nereis £. occldentalis

Nereis succinea 9

NEPHTYIDAE

Aglaophamus verrilll 9

ONUPHIDAE

Onuphis sp. 1

ORBINIIDAS

Scoloplos robustus I

SP ION I DAE

Apoprionospio pygmaea 11 .

Paraprionospio pinnata 1

Prionospio cirrobranchiata 2

Scolelepis squamata 1

CHAETOPTERIDAE

Spiochaetopterus c. oculatus 1

FLABELLIGERIDAE

Pherusa arenosa 1

OPHELIIDAE

Travisia sp. 128

CAPITELLIDAE

Heteromastus f llif ormls 5

TERBELLIDAE

Loimia medusa 1

1

16

999

STATION 10-7

Sediment Type: Sand

Weight Percentages — Granules: 0.0

Silts: 0.8

Date: Aug. 28

Sands:
Clay:

98.6
0.5

Family and Species

Dredge Shovel Net

SIGALIONIDAE

Sthenelais boa

PHYLLODOCIDAE

Phyllodoce arenae

HESIONIDAE

Gyptls vlttata

SYLLIDAE

Syllis sp. B

NEREIDAE

Nereis succinea

NEPHTYIDAE

Aqlaophamus verrilli

GONIADIDAE

Glycinde paciflca

ONUPHIDAE

Diopatra cuprea

SPIONIDAE

Apoprionosplo pyqmaea

CHAETOPTERIDAE

Splochaetopterus c. oculatus

OPHELIIDAE

Travisia sp.

CAPXTELLIDAE

Heteromastus f illformis

OWENIIDAE

Owenia fusiformis

8
3
1
1
2

54
1
1
1
i

39
2
2

1000

STATION 10-7--(Contlnued)

Family and Species

Dredge Shovel Net

AMPHARETIDAE

Isolda pulchella

TEREBELLIDAE

Lolmia medusa

1001

STATION 10-8

Sediment Type: Sand

Weight Percentages — Granules: 0.0

Silts: 1.2

Date: Aug. 28

Sands: 98.0
Clay: 0.8

Family and Species

Dredge Shovel Net

POLYNOIDAE

Polynoid B

SIGALIONIDAE

Sthenelais boa

PHYLLODOCIDAE

Phyllodoce arenae

HESIONIDAE

Gyptis vittata

NEPHTYIDAE

Aqlaophamus verrilll

GONIADIDAE

Glycinde pacif ica

ORBINIIDAE

Scoloplos robustus
Scoloplos rubra

SPIONIDAE

Apoprionosplo pygmaea
Paraprionospio pinnata

CHAETOPTERIDAE

Spiochaetopterus c. oculatus

OPHELIIDAE

Travisla sp.

OWENIIDAE

Owenia fuslformis

1
9
6
2
20
7

16

132

3

1002

STATION 10-9

Sediment Type: Sand

Weight Percentages — Granules: 0.0

Silts: 1.2

Date: Aug. 29

Sands: 98.4
Clay: 0.4

Family and Species

Dredge Shovel Net

PHYLLODOCIDAE

Phyllodoce arenae

HESIONIDAE

Gyptis vittata

NEREIDAE

Nereis succinea

NEPHTYIDAE

Aglaophamus verrilll

GONIADIDAE

Glycinde pacif ica

0R31NIIDAE

Scoloplos rubra

SPIONIDAE

Apoprionospio pyqrnaea
Paraprionospio pinnata

POECILOCHAETIDAE

Poecilochaetus johnsoni

CHAETOPTERIDAE

Spiochaetopterus c. oculatus

OPHELIIDAE

Travisia sp.

PECTINARIIDAE

Cistenides gouldii

7

2

3
36

3
1

1

14

130

1

10

1003

STATION 10-10

Sediment Type: Sand
Weight Percentages: —

Date: Aug. 29

Granules:
Silts:

0.0
0.0

Sands :
Clay:

100.0
0.0

Family and Species

Dredge Shovel Net

PHYLLODOCIDAE

Phyllodoce arenae

NEREIDAE

Nereis succlnea
Platynereis dumerllli

NEPHTYIDAE

Aglaophamus verrilli

ONUPHIDAE

Diopatra cuprea

ORBINIIDAE

Scoloplos rubra

SPIONIDAE

Apoprionospio pyqmaea
Dispio uncinata

OPHELIIDAE

Travisia sp.

MALDANIDAE

Clymenella mucosa

1
12

1
3
1

81
1

25
2

1004

STATION 10-11

Sediment Type: Sand
Weight Percentages —

GranuJ.es:
Silts:

0.0
0.1

Date: Aug. 29

Sands:
Clay:

99.9
0.0

Family and Species

Dredge Shovel Net

PHYLLODOCIDAE

Phyllodoce arenae

HESIONIDAE

Parahesione luteola

NEREIDAE

Nereis succinea

G0NIADIDAE

Glycinde pacif ica

ONUPHIDAE

Diopatra cuprea

ORBINIIDAE

Scoloplos robustus
Scoloplos rubra

PARAONIDAE

Aricidea sp.

OPHELIIDAE

Travisia sp.

CAPITELLIDAE

Capltella capitata
Capitellides jonesi

MALDANIDAE

Clymenella mucosa

1

5

1

12

1

37

16
3

137

5

STATION 10-12

1005

Sediment Type: Sand

Weight Percentages — Granules: 0.6

Silts: 0.4

Date: Aug. 29

Sands: 98.7
Clay: 0.3

Family and Species

Dredge Shovel Net

AMPHINOMIDAE

Pseudeurythoe ambiqua

PHYLLODOCIDAE

Eteone heteropoda
Phyllodoce arenae

NEREIDAE

Nereis succinea

GLYCERIDAE

Glycera americana

G0NIADIDAE

Glycinde pacif ica

ONUPHIDAE

Diopatra cuprea
Onuphis sp.

ORBINIIDAE

Scolopios rubra

PARAONIDAE

Aricidea sp.

SPIONIDAE

Apoprionospio pyqmaea
Paraprionospio pinnata
Pclydora socialis
Scolelepis squama ta

MAGELCNIDAE

Kagelona pettlboneae

POECILOCHAETIDAE

Poecilochaetus johnsoni

OPHELIIDAE

Travisla sp.

8
2

10

6

36

10

2

51

1006

STATION 10-12— (Continued)

Family and Species

Dredge Shovel Net

CAPITELLIDAE

Capitella capitata

PECTINARIIDAE

Cistenides qouldll

AMPHARETIDAE

Melinna maculata

24
3
1

1007

STATION 10-13

Sediment Type: Sand

Weight Percentages — Granules: 1.3

Silts: 0.0

Date: Aug

Sands
Clay:

29

98.7
0.0

Family and Species

Dredge Shovel Net

PHYLLODOCIDAE

Eteone heteropoda

NEREIDAE

Laeonereis culver!
Nereis succinea

5
16

GONIADIDAE

Glycinde pacif ica

0NUPHIDAE

Diopatra cuprea
Onuphis sp.

ORBINIIDAE

Scoloplos robustus
Scoloplos rubra

PARAONIDAE

Arlcidea fraqilis
Aricidea sp.

SPIONIDAE

Polydora socialis

MAGELONXDAE

Kaqelona pettiboneae

POECILOCHAETIDAE

Poecllochaetus johnsoni

OPHELIIDAE

Travisia sp.

CAPITSLLIDAE

Capitella capitata

PECTINARIIDAE

Cistenides gouldli

14
58

1
3

i

1

16

1008

STATION 10-14-A

Sediment Type: Sand
Weight Percentages —

Granules:
Silts:

0.0
0.7

Date: Sept. 4

Sands:

Clay:

98.9
0.5

Family and Species

Dredge Shovel Net

PHYLLODOCIDAE

Eteone heteropoda
Phyllodoce arenae

NEREIDAE

Laeonereis culveri
Nereis succinea

GLYCERIDAS

Glycera americana

GONIADIDAE

Glycinde pacif ica

ONUPHIDAE

Diopatra cuprea
Onuphis sp.

ORBINIIDAE

Scoloplos robustus

SPIONIDAE

Apoprionospio pyqmaea

MAGELONIDAE

Kagelona pettiboneae

CHAETOPTERIDAE

Spiochaetopterus c. oculatus

CAPITELL1DAE

Capitella capita ta

OWENIIDAE

Owenia fusiformis

5

1

1
16

123
52

1

e

21
16

18
51

1009

STATION 10-14-B

Sediment Type: Sand Date: Sept. 4

Weight Percentages — Granules: 0.6 Sands: 98.1

Silts: 0.9 Clay: 0.4

Family and Species Dredge Shovel Net

SPIONIDAE

Paraprionospio pinnata 4

CAPITELLIDAE

Capitella capitata 3

PECTINARIIDAE

Clstenides gouldii 5

1010

STATION 10-15
Sediment Type: Sand

Weight Percentages — Granules: 0.5

Silts: 3.5

Date: Sept. 4

Sands: 93.3
Clay: 2.6

Family and Species

SIGALIONIDAE

Sthenelais boa

PHYLLODOCIDAE

Phyllodoce arenae

HESIONIDAE

Parahesione luteola

NEREIDAE

Laeonereis culveri
Nereis succinea

NEPHTYIDAE

Aglaophamus verrilli

GLYCERIDAE

Glycera americana

GONIADIDAE

Glycinde paciflca

ONUPHIDAE

Diopatra cuprea

ORBINIIDAE

Scoloplos robustus
Scoloplos rubra

PARAONIDAE

Aricidea sp.

SPIONIDAE

Paraprionospio pinnata
Polydora websteri

MAGELONIDAE

Maqelona pettiboneae

Dredge Shovel Net

1
6 17

2 6

5
24

10
1
6

II

1
43

29

1

59

21
10

1C
10

1011

STATION 10-15— (Continued)

Family and Species Dredge Shovel Net

POECILOCHAETIDAE

Poecilochaetus johnsoni 1

CHAETOFTERIDAE

Spiochaetopterus c. oculatus 1 1

CIRRATULIDAE

Tharyx sp. C 5

PECTINARIIDAE

Clstenides gouldil 5 10

STATION 10-16

1012

Sediment Type: Sand

Weight Percentages — Granules: 0.5

Silts: 7.9

Date: Sept. 4

Sands:
Clay:

89.0
2.6

Family and Species

Dredge Shovel Net

PHYLLODOCIDAE

Phyllodoce arenae

HESIONIDAE

Gyptis vittata
Paraheslone luteola
Gyptis sp.

PILARGIDAE

Anclstrosyllis jonesi
Siqambra tentaculata

NEREIDAE

Laeonereis culverl

Nereis succinea

GONIADIDAE

Glycinde pacifica

ONUPHIDAE

Diopatra cuprea
Onuphis sp.

ORBINIIDAE

Scoloplos rubra

SPIONIDAE

Paraprionosplo plnnata
Polvdora websteri
Prionospio cirrcbranchiata
Pseudopolydora sp.

CHAETOPTERIDAE

Spiochaetopterus c. oculatus

CIRRATULIDAE

Cirratulus sp. D
Tharyx sp. C

13

2
11

1

28

20
1
S
7

4

15

23

1

1013

STATION 10-16 — (Continued)

Family and Species Dredge Shovel Net

PECTINARIIDAE

Clstenldes gouldii

AMPHARETIDAE

Isolda pulchella

1014

STATION 10-17
Sediment Type: Silty Sand
Weight Percentages — Granules: 0.7

Silts:

20.1

Date: Sept. 4

Sands:
Clay:

67.4
11.8

Family and Species

Dredge Shovel Net

POLYNOIDAE

Lepidasthenia commensalis
Polynoid B

PHYLLODOCIDAE

Phyllodoce arenae

HESIONIDAE

Gyptis vittata
Parahesione luteola
Gyptis sp.

PILARGIDAE

Sigambra tentaculata

NEPHTYIDAE

Aglaophamus verrilli

GONIADIDAE

Glycinde pacif ica

ONUPH1DAE

Diopatra cuprea

SPIONIDAE

Paraprionospio plnnata
Prionospio cirrobranchlata
Pseudopolydora sp.

CHAETOPTERIDAE

Spiochaetopterus c. oculatus

CIRRATULIDAE

Cirratulus sp. D

41
15
72

10

1

10

3

1015

STATION 10-18

Sediment Type: Shelly Sand

Weight Percentages — Granules: 44.5

Silts: 0.5

Date: Sept. 4

Sands:
Clay:

55.0
0.0

Family and Species

Dredge Shovel Net

SYLLIDAE

Brania clavata

NEREIDAE

Nereis succinea

DORVILLEIDAE

Dorvillea rudolphi

SPIONIDAE

Polydora soclalis
Polydora websteri

CAPITELLIDAE

Capitella capitata

2

44
11

STATION 10-19

1016

Sediment Type: Sand

Weight Percentages — Granules: 2.5

Silts: 3.8

Date: Sept. 4

Sands: 92.1
Clay: 1.5

Family and Species

Dredge Shovel Net

PHYLLODOCIDAE

Phyllodoce arenae

HESIONIDAE

Gyptis vittata

PILARGIDAE

Sigambra tentaculata

SYLLIDAE

Brania sp.

NEREIDAE

Nereis succinea
Platynereis dumerllii

NEPHTYIDAE

Aglaophamus verrilli

ONUPHIDAE

Diopatra cuprea
Onuphis sp.

ORBINIIDAE

Scoloplos rubra

SPIONIDAE

Paraprionospio pinnata
Polydora v«ebsteri
Prionospio cirrobranchiata
Streblospio benedicti

CHAETOPTSRIDAE

Spiochaetopterus c. oculatus

CIRRATULIDAE

Tharyx sp. C

CAPITELLIDAE

Capltellides jonesl

10

49
9

22

19
16

13

1

10

10

1

8
10

1017

STATION 10-20

Sediment Type: Sand

Weight Percentages — Granules: 0.8

Silts: 6.4

Date: Sept. 4

Sands: 89.8
Clay: 3.1

Family and Species

Dredge Shovel Net

PHYLLODOCIDAE

Phyllodoce arenae

NEREIDAE

Nereis succinea

ONUPHIDAE

Diopatra cuprea

ORBINIIDAE

Scoloplos rubra

SPIONIDAE

Paraprionospio pinnata
Polydora websteri

CHAETOPTERIDAE

Spiochaetopterus c. oculatus

CIRRATULIDAE

Tharyx sp. C

MALDANIDAE

Branchioasychls americana

AKPHARETIDAE

Melinna maculata

102

1018

STATION 10-21

Sediment Type: Sand Date: Sept. 4

Weight Percentages — Granules: 0.1 Sands: 87.7

Silts: 8.6 Clay: 3.6

Family and Species Dredge Shovel Net

PHYLLODOCIDAE

Phyllodoce arenae X

HESIONIDAE

Parahesione luteola X

SPIONIDAE

Paraprionospio pinnata 56

CHAETOPTERIDAE

Spiochaetopterus c. oculatus 1

CIRRATULIDAE

Tharyx sp. C X

1019

STATION 10-22

Sediment Type: Sand
Weight Percentages -

Date:

Sept. 5

Granules:
Silts:

0.2
1.8

Sands
Clay:

: 95.6
2.3

Family and Species

Dredge Shovel Net

AMPHINOKIDAE

Pseudeurythoe ambigua

HESIONIDAE

Gyptis vittata
Parahesione luteola

NEREIDAE

Nereis succlnea

NEPHTYIDAE

Nephtys picta

GLYCERIDAE

Glycera americana

GONIADIDAE

Glycinde pacif ica

ONUPHIDAE

Diopatra cuprea

ORBINIIDAE

Scoloplos rubra

SPIONIDAS

Paraprionospio pinnata
Polydora websteri
Streblospio benedictl

CHAETOPTERIDAE

Spiochaetopterus c. oculatus

CIRRATULIDAE

Tharyx sp. C

CAPITELLIDAE

Heteromastus flliformls

3
2

74

1

6

6

93

27

49
5

8

23

3

2
340

2

5

10

12
73
10

1020

STATION 10-22 — (Continued)

Family and Species Dredge Shovel Net

MALDANIDAE

Maldane sarsi 1

PECTINARIIDAE

Cistenides gouldii 9 10

1019

STATION 10-22

Sediment Type: Sand
Weight Percentages -

Date:

Sept. 5

Granules:
Silts:

0.2
1.8

Sands
Clay:

: 95.6
2.3

Family and Species

Dredge Shovel Net

AMPHINOKIDAE

Pseudeurythoe ambigua

HESIONIDAE

Gyptis vittata
Parahesione luteola

NEREIDAE

Nereis succlnea

NEPHTYIDAE

Nephtys picta

GLYCERIDAE

Glycera americana

GONIADIDAE

Glycinde pacif ica

ONUPHIDAE

Diopatra cuprea

ORBINIIDAE

Scoloplos rubra

SPIONIDAS

Paraprionospio pinnata
Polydora websteri
Streblospio benedictl

CHAETOPTERIDAE

Spiochaetopterus c. oculatus

CIRRATULIDAE

Tharyx sp. C

CAPITELLIDAE

Heteromastus flliformls

3
2

74

1

6

6

93

27

49
5

8

23

3

2
340

2

5

10

12
73
10

1020

STATION 10-22 — (Continued)

Family and Species Dredge Shovel Net

MALDANIDAE

Maldane sarsi 1

PECTINARIIDAE

Cistenides gouldii 9 10

1021

STATION 10-23

Sediment Type: Sand

Weight Percentages — Granules: 0.1

Silts: 0.5"

Date: Sept. 5

Sands:
Clay:

99.1
0.3

Family and Species

Dredge Shovel Net

HESIONIDAE

Parahesione luteola

NEREIDAE

Laeonerels culver!
Nereis succinea

GONIADIDAE

Glycinde paclf ica

ONUPHIDAE

Dlopatra cuprea

ORBINIIDAE

Scoloplos robustus
Scoloplos rubra

SPIONIDAE

Polydora websteri
Streblospio benedictl

CAPITSLLIDAE

Capitellldes jonesi

1
36

6
4

4

1

68

10

21

1022

STATION 11-1
Sediment Type: Sand

Weight Percentages — Granules: 0.7

Silts: 0.4

Date. Sept. 10

Sands:
Clay:

98.7
0.2

Family and Species

AMPHINOMIDAE

Pseudeurythoe ambiqua

PHYLLCDOCIDAE

Eteone heteropoda

SYLLIDAE

Brania sp.

NEREIDAE

Nereis £. occldentalis
Nicon lackyi

ONUPHIDAE

Onuphis sp.

ORBIN1IDAE

Scoloplos robustus

SPIONIDAE

Scolelepis squamata

MAGELONIDAE

Maqelona pettlboneae

CIRRATULIDAE

Cirriforma sp. B

OPHELIIDAE

Travisia sp.

CAPITELLIDAE

Capltella capltata
Capitellides jonesi
Heteromastus filiformis

ARENICOLIDAE

Arenicola crlstata

Dredge Shovel Net

2

2
9

88
3
1
b

2
25

J?

1023

STATION 11-1 — (Continued)

Family and Species Dredge Shovel Net

MALDANIDAE

Clymenella mucosa 28

PECTINARIIDAE

Cistenides gouldii 10

1024

STATION 11-2

Sediment Type: Sand Date: Sept. 10

Weight Percentages — Granules: 0.1 Sands: 99.3

Silts: 0.4 Clay: 0.2

Family and Species Dredge Shovel Net

POLYNOIDAE

Harmothoe lunulata 2

HESIONIDAE

Gyptis vittata 2

NEREIDAE

Nicon lackeyi 1

ONUPHIDAE

Onuphis sp. 17

0RBINIIDAE

Scoloplos rubra 1

PARAONIDAE

Aricidea taylori 6

SPIONIDAE

Prionospio cirrobranchiata 1

MAGELONIDAE

Magelona pettiboneae 2

CHAETOPTERIDAE

Spiochaetopterus c. oculatus 2

OPHELIIDAE

Travisa sp. 25

CAPITELLIDAE

Heteromastus fillformis 2

MALDAN1DAE

Clymenella mucosa IX

1025

STATION 11-3
Sediment Type: Sand

Weight Percentages — Granules: 0.0

Silts: 0.1

Date: Sept. 10

Sands: 99.8
Clay: 0.1

Family and Species

Dredge Shovel Net

SIGALIONIDAE

Sthenelais boa

PHYLLODOCIDAE

Phyllodoce arenae
Phyllodoce fraqilis

HESIONIDAE

Gyptis vittata

NEREIDAE

Nereis p_. occidentalis
Nereis succinea

ONUPHIDAE

Onuphis sp.

SPIONIDAE

Polydora socialis
Prionospio h. texana
Spio setosa

POECILOCHAETIDAE

Poecilochaetus johnsoni

CHAETOPTERIDAE

Spiochaetopterus c. oculatus

OPHELIIDAE

Travisia sp.

CAPITELLIDAE

Capitella capitata
Capitellides jonesl
Heteromastus filiformis

KALDANIDAE

Clymenella mucosa

PECT1NARIIDAE

Clstenldes gouldii

11

10

22

363

1

10

1026

STATION 11-4

Sediment Type: Sand

Weight Percentages — Granules: 0.2

Silts: 1.5

Date: Sept. 10

Sands:
Clay:

97.8
0.5

Family and Species

Dredge Shovel Net

POLYNOIDAE

Harmothoe lunulata

SIGALIONIDAE

Sthenelais boa

PHYLLODOCIDAE

Parana! tes speciosa

Phyllodoce arenae

Phyllodoce fraqills

HESIONIDAE

Gyptis vittata

SYLLIDAE

Exoqone dispar

NEREIDAE

Nereis succinea

NEPHTYIDAE

Aqlaophamus verrllli

GONIADIDAE

Glycinde paclf ica

ONUPHIDAE

Onuphis sp.

LUMBRINERIDAE

Lumbrineris cocclnea
Lumbrinerls latreilll

SP ION I DAE

Apoprionospio pyqmaea
Paraprionospio pinnata
Prionospio clrrobranchiata

CHAETOPTERIDAE

Splochaetopterus c. oculatus

1
19

4
1
4
55
4
6

14

9

13

2
10

5

10

1

1027

STATION 11-4— (Continued)

Family and Species

Dredge Shovel Net

OPHELIIDAE

Travisia sp.

CAPITELLIDAE

Capitellides jonesi
Heteromastus f illformis

MALDANIDAE

Clymenella mucosa

OWENIIDAE

Owenia fusiformis

PECTINARIIDAE

Cistenides gouldll

AMPHARETIDAB

Isolda pulchella

TEREBELLIDAE

Plsta cristata
Pista palmata
Polycirrus exlmlus

34

2
18

4
24
34

7

1
3

10
10

1028

STATION 11-5

Sediment Type: Sand
Weight Percentages —

Granules:
Silts:

0.3
2.4

Date: Sept. 10

Sands:
Clay:

96.7
0.7

Family and Species

Dredge Shovel Net

POLYNOIDAE

Harmothoe lunulata

SIGALIONIDAE

Sthenelals boa

PHYLLODOCIDAE

Phyllodoce arenae

HESIONIDAE

Gyptis vlttata

SYLLIDAE

Exogone dispar

NEREIDAE

Nereis succinea

NEPHTYIDAE

Aqlaophamus verrilll
Nephtys picta

ONUPHIDAE

Onuphis sp.

SPIONIDAE

Polydora soclalis
Prionospio cirrobranchiata
Spiophanes bombyx

POECILOCHAETIDAE

Poecilochaetus johnsoni

CHAETOPTERIDAE

Chaetopterus varlopedatus
Spiochaetopterus c, oculatus

FLABELLIGERIDAE

Pherusa arenosa

1

9

18

1
1
2

135

1

23

1029

STATION 11-5— (Continued)

Family and Species

Dredge Shovel Net

OPHELIIDAE

Travisia sp.

CAPITELLIDAE

Capitella capitata

OWENIIDAE

Owenla fusiformis

11

1
10

1030

STATION 11-6

Sediment Type: Sand

Weight Percentages — Granules: 0.1

Silts: 2.9

Date: Sept. 10

Sands:
Clay:

95.6
1.5

Family and Species

POLYNOIDAE

Harmothoe lunulata
Lepidasthenia commensalis
Polynoid B

SIGALIONIDAE

Sthenelais boa

CHRYSOPETALIDAE

Paleanotus heteroseta

PHYLLODOCIDAE

Phyllodoce arenae

HESIONIDAE

Gyptis vittata

PILARGIDAE

Sigambra tentaculata

NEREIDAE

Nereis succinea

NEPHTYIDAE

Aglaophamus verrilli
Nephtys picta

GLYCERIDAE

Glycera americana

GONIADIDAE

Glycinde pacifica

SPIONIDAE

Apoprionospio pyqmaea
Paraprionospio pinnata
Prionospio cirrobranchiata

CHAETOPTERIDAE

Chaetopterus varlopedatus
Spiochaetopterus c. oculatus

Dredge Shovel Net

I

I

16

16
i
1
5
2
2

IS
4

1
23

12

2
54

1031

STATION 11-6 — (Continued)

Family and Species

Dredge Shovel Net

CIRRATULIDAE

Tharyx sp. C

OFHELIIDAE

Travisla sp.

CAPITELLIDAE

Capltella capitata
Notomastus hemlpodus
Notomastus laterlceus

PECTINARIIDAE

Clstenides qouldii

TEREBELLIDAE

Terebella rubra

1032

STATION 11-7

Sediment Type: Sllty Mud Date: 3ept> %Q

Weight Percentages — Granules: 0.8 Sands- 31 9

Silts: 45.3 Clay:' 22!o

Family and Species Dredge Shovel Net

10

POLYNOIDAE

Polynoid B o

SIGALIONIDAE

Sthenelais boa g

AMPHINOMIDAE

Pseudeurvthoe ambiqua

HESIONIDAE

Gyptis vittata

Parahesione luteola 7

PILARGIDAE

Siqambra tentaculata i

NEPHTYIDAE

Aqlaophamus verrillj j

GONIADIDAE

Glycinde pacifica x

SPIONIDAE

Paraprionosplo pinnata 34

Prionoscio cirrobranchlata 3

Pseudopolydora sn. i

CHAETCPTSRIDAE

Spiochaetopterus c. oculatus 39

CAPITELLIDAE

Capitella capitata x

2
36

1033

STATION 11-8

Sediment Type: Clayey Silt Date: Sept. 17

Weight Percentages — Granules: 0.5 Sands: 16 2

Silts: 50.2 Clay: 33!o

Family and Species Dredge Shovel

Net

1
17

POLYNOIDAE

Polynoid B 12

SIGALIONIDAE

Sthenelais boa 9

AMPHINOMIDAE

Pseudeurythoe ambiqua 1 -,

PHYLLODOCIDAE

Phyllodoce arenae 5

HESI0N1DAE

Gyptis vittata 3 -

Parahesione luteola 1

P1LARGIDAE

Siqambra tentaculata 8 3

GONIADIDAE

Glycinde paclfica 2 12

DORVILLEIDAE

Dorvillea rudolphi j

SPIONIDAE

Paraprionospio pinnata 46 100+

Prlonospio clrrobranchlata 8
Pseudopolydora so. 4

CHAETOPTERIDAE

Chaetopterus variopedatus i

Spiochaetopterus c. oculatus 3 1

CIRRATULIDAE

Tharyx sp. C 3

PECTINARIIDAE

Cistenldes gouldli 5 10

TEREBELLIDAE

Lolmla vlridis 1

1034

STATION 11-9

Sediment Type: Silty Sand Date. Sept. 17

Weight Percentages — Granules: 0.1 Sands: 79.4

Silts: 12.2 Clay: 8.3

Family and Species Dredge Shovel Net

SIGALIONIDAE

Sthenelais boa 12

AMPHINOMIDAE

Pseudeurythoe ambiqua 12

PHYLLODOCIDAE

Phyllodoce arenae 2

HESIONIDAE

Gyptis vittata 28

Parahesione luteola 7

PILARGIDAE

Siqambra tentaculata 37

NEPHTYIDAE

Aqlaophamus verrilli 1

GONI.iDIDAE

Glycinde pacifica 12

SPIONIDAE

Paraprionospio pinnata 116

Prionospio cirrobranchlata 42

Pseudopolydora sp. 215

CHAETOPTERIDAE

Spiochaetopterus c. oculatus 1

CIRRATULIDAE

Tharyx sp. C 136

CAPITELLIDAE

Capitellides jonesi 4

Heteromastus filiformis 4

1035

STATION 11-10

Sediment Type: Silty Mud Date: Sept. 17

Weight Percentages — Granules: 0.2 Sands: 22.2

Silts: 49.5 Clay: 28.2

Family and Species Dredge Shovel Net

PHYLLODOCIDAE

Phyllodoce arenae X

SPIONIDAE

Paraprionospio plnnata 2

CHAETOPTERIDAE

Spiochaetopterus c. oculatus 1

1036

STATION 11-11

Sediment Type: Sllty Clay

Weight Percentages — Granules: 1.0

Silts: 32.8

Date: Sept. 17

Sands: 26.9
Clay: 39.2

Family and Species

Dredge Shovel Net

POLYNOIDAE

Polynoid B

AMPHINOMIDAE

Pseudeurythoe ambiqua

HESIONIDAE

Gyptis vittata
Parahesione luteola

PILARGIDAE

Slqambra tentaculata

GONIADIDAE

Glycinde pacif lea

SPIONIDAE

Paraprionospio pinnata
Prionospio cirrobranchlata
Pseudopolydora sp.

CHAETOPTERIDAE

Spiochaetopterus c. oculatus

CIRRATULIDAE

Tharyx sp. C

CAPIT3LLIDAE

Capitellides jonesl

PECTINARIIDAE

Cistenldes gouldii

1
11

14

1037

STATION 11-12

Sediment Type: Silty Clay Date: Sept. 17

Weight Percentages — Granules: 0.4 Sands: 12.4

Silts: 40.2 Clay: 47.0

Family and Species Dredge Shovel Net

POLYNOIDAE

Polynoid B

SIGALIONIDAE

Sthenelais boa

1

AMPHINONIDAE

Pseudeurythoe ambiqua 2 3

PHYLLODOCIDAE

Phyllodoce arenae 1 2

HESICNIDAE

Gyptis vittata 7 4

Parahesione luteola 14

PILARGIDAE

Siqambra tentaculata 10

GONIADIDAE

Glycinde paclfica 2

SPIONIDAE

Paraprionospio pinnata 74 17

Prionospjo cirrobranchiata 7

Pseudopolydora sp. 11

CHAETOPTERIDAE

Spiochaetopterus c. oculatus 1 1

C1RRATULIDAE

Cirratulus sp. D 1

Tharyx sp. C 1

1038

STATION 11-13

Sediment Type: Clayey Silt Date: Sept. 17

Weight percentages — Granules: 0.9 Sands: 7.9
Silts: 48.3 Clay: 43.0

Family and Species Dredge Shovel Net

POLYNOIDAE

Polynoid B 1

SIGALIONIDAE

Sthenelals boa 2

AMPHINOMIDAE

Pseudeurythoe amblqua 2

PHYLLODOCIDAE

Phyllodoce arenae

HESIONIDAE

Gyptls vittata 3

Parahesione luteola 5

Gyptls sp. 3

PILARGIDAE

Slgambra tentaculata 3

GONIADIDAE

Glycinde paclf lea 1

SPIONIDAE

Paraprionosplo pinnata 36

Prionospio cirrobranchlata 2

Ps eudopolydora sp. 1

CHAETOPTERIDAE

Spiochaetopterus c. oculatus 8

CIRRATULIDAE

Tharyx sp. C 1

PECTINARIIDAE

Clstenldes qouldil

1039

STATION 11-14

Sediment Type: Clayey Silt Date: Sept. 18

Weight percentages — Granules: 0.0 Sands: 6.4

Silts: 51.0 Clay: 42.4

Family and Species Dredge Shovel Net

POLYNOIDAE

Polynoid B 2

SIGALIONIDAE

Sthenelais boa 6

AMPHINOMIDAE

Pseudeurythoe amblgua 1 3

HESIONIDAE

Gyptls vlttata 1

Parahesione luteola 18

Gyptls sp. 2

PILARGIDAE

Sigambra tentaculata 6 1

GONIADIDAE

Glyclnde pacif ica 1

SPIONIDAE

Paraprionospio pinna ta 198 20

Prlonosplo cirrobranchlata 13

Pseudopolydora sp. 1

CHAETOPTERIDAE

Splochaetopterus c. oculatus 10 1

PECTINARIIDAE

Cistenldes gouldii 4

STATION 11-15

1040

Sediment Type: Shelly Sand
Weight percentages — Granules: 41.5
Silts: 9.2

Date: Sept. 18
Sands: 43.7
Clay: 5.6

Family and Species

Dredge Shovel Met

POLYNOIDAE

Harmothoe lunulata

SIGALIONIDAE

Sthenelais boa

15

PHYLLODOCIDAE

Phyllodoce arenae

HESIONIDAE

Gyptis vittata
Parahesione luteola
Gyptis sp.

PILARGIDAE

Slgambra tentaculata

NEREIDAE

Nereis succlnea

GONIADIDAE

Glyclnde paclfica

ONUPHIDAE

Onuphis nebulosa

SPIONIDAE

Paraprlonospio pinnata 352

Prlonospio clrrobranchlata 43

Pseudopolydora sp. 167

26

CHAETOPTERIDAE

Spiochaetopterus c. oculatus

1041

STATION 11-15 — (Continued)

Family and Species

Dredge Shovel Net

CIRRATULIDAE

Cirratulus sp. D
Clrriformia sp. A
Tharvx sp. C

PECTINARIIDAE

Clstenides gouldil

AMPHARETIDAE

Isolda pulchella

42

1
2

1042

STATION 11-16

Sediment Type: Sand Dates Sept. 18

Weight percentages — Granules: 10.5 Sands: 72.8

Silts: 11.7 Clay: 4.9

Family and Species Dredge Shovel Net

POLYNOIDAE

Harmothoe lunulata

SIGALIONIDAE

Sthenelais boa

PHYLLODOCIDAE

Phvllodoce arenae

4

HESIONIDAE

Gvptls vittata

1

PILARGIDAE

Cabira incerta
Siqambra tentaculata

1
2

NEREIDAE

Nereis succinea

2

NEPHTYIDAE

Aqlaophamus verrilli

1

GONIADIDAE

Glycinde pacifica

1

ONUPHIDAE

Onuphis nebulosa

13

ORBINIIDAE

Orbinia ornata
Scoloplos rubra

1
1

SPIONIDAE

Paraprionospio pinnata
Polydora soclalis
Prionospio cirrobranchiata
Pseudopolydora sp.

84

1
8

1

25

1

1043

STATION 11-16 — (Continued)

Family and Species Dredge Shovel Net

POECILOCHAETIDAE

Poecilochaetus johnsoni 5

CHAETOPTERIDAE

Chaetopterus varlopedatus 2 1

Spiochaetopterus c. oculatus 117 1

CIRRATULIDAE

Cirratulus sp. D 46 3

CAPITELLIDAE

Heteromastus fillformia 4 2

MALDANIDAE

Branchloasychls americana 1

Clymenella mucosa 1

OWENIIDAE

Owen is fusiformis 1

STATION 11-17

1044

Sediment Type: Sllty Sand
Weight percentages — Granules: 0.1
Silts: 25.9

Date: Sept. 18
Sands: 56.0
Clay: 18.0

Family and Species

Dredge Shovel Net

POLYNOIDAE

Polynoid B

SIGALIONIDAE

Sthenelals boa

PHYLLODOCIDAE

Phvllodoce arenae

HESIONIDAE

Gyptls vlttata
Paraheslone luteola
Gyptls sp.

6

8

21

PILARGIDAE

Sigambra tentaculata

11

NEPHTYIDAE

Aglaophamus verrilll

ONUPHIDAE

Onuphls nebulosa

SPIONIDAE

Paraprionospio pinnata
Prlonospio cirrobranchiata
Pseudopolvdora sp.

28

6

1098

CHAETOPTE RIDAE

Spiochaetopterus c. oculatus

CIRRATULIDAE

Tharyx sp. C

1

MALDANIDAE

Clymenella mucosa

1

23

1045
STATION 11-17 ~ (Continued)

Family and Species Dredge Shovel Net

PECTINARIIDAE

Clstenldes gouldll 1

STATION 11-18

1046

Sediment Type: Clayey Silt
weight percentages — Granules: 0.3
Silts: 52.6

Date: Sept. 19
Sands: 4.6
Clay: 42.5

Family and Species

Dredge Shovel Net

POLYNOIDAE

Polynoid B

SIGALIONIDAE

Sthenelals boa

PHYLLODOCIDAE

Phyllodoce arenae

HESIONIDAE

Gyptls vittata
Parahesione luteola

PILARGIDAE

Sigambra tentaculata

GONIADIDAE

Glyclnde paclf ica

DORVILLEIDAE

Dorvlllea rudolphl

SPIONIDAE

Paraprionosplo pinnata 112
Prlonosplo cirrobranchiata 7

22
1

CHAETOPTERIDAE

Spiochaetopterus c. oculatus

CIRRATULIDAE

Tharyx sp. C

18

PECTINARIIDAE

Cistenldes gouldll

1047

STATION 11-19

Sediment Type: Sllty Clay
Weight percentages — Granules: 0.0
Silts: 35.2

Date: Sept. 19
Sands: 14.6
Clay: 50.3

Family and Species

Dredge Shovel Net

AMPHINOMIDAE

Pseudeurythoe amblqua 1

PHYLLODOCIDAE

Phyllodoce arenae 1

HESIONIDAE

Gyptis vittata 3

Paraheslone luteola 2

Gyptis sp. 3

PILARGIDAE

Sigambra tentaculata 7

GONIADIDAE

Glycinde paclfica 11

DORVILLEIDAE

Dorvillea rudolphi 1

SPIONIDAE

Paraprlonospio plnnata 87

Prionospio cirrobranchlata 5

CHAETOPTERIDAE

Splochaetopterus c. oculatus 13

PECTINARIIDAE

Clstenldes gouldil

11

19
1

STATION 11-20

1048

Sediment Type: Silty Sand
Weight percentages — Granules: 1.5
Silts: 13.3

Date: Sept. 19
Sands: 76.3
Clay: 8.8

Family and Species

Dredge Shovel Net

POLYNOIDAE

Harmothoe lunulata
Polynoid B

SIGALIONIDAE

Sthenelais boa

PHYLLODOCIDAE

Phyllodoce arenae

12

HESIONIDAE

Gyptis vittata

PILARGIDAE

Ancistrosvllis jonesl
Sigambra tentaculata

1
4

NEREIDAE

Nereis succinea

11

NEPHTYIDAE

Nephtys picta

GONIADIDAE

Glyclnde paciflca

26

ONUPHIDAE

Onuphis nebulosa

DORVILLEIDAE

Dorvlllea rudolphl

SPIONIDAE

Paraprionosplo plnnata
Prlonosplo clrrobranchlata
Prlonospio h. texana

27
16

18

1

1049
STATION 11-20 ~ (Continued)

Family and Species Dredge Shovel Net

CHAETOPTERIDAE

Chaetopterus varlopedatus 3 1

Splochaetopterus c. oculatus 12 1

CIRRATULIDAE

Tharyx sp. C 35

CAPITELLIDAE

Heteroniastus fillformls 1

MALDANIDAE

Branchloasychls amerlcana 1

PECTINARIIDAE

Cistenldes qouldil 9

1050

STATION 11-21

Sediment Types Silty Sand
Weight percentages — Granules: 1.7
Silts: 19.0

Date: Sept. 19
Sands: 66.2
Clay: 13.1

Family and Species

Dredge Shovel Net

POLYNOIDAE

Polynoid B

CHRYSOPETALIDAE

Paleanotus heteroseta

PHYLLODOCIDAE

Eteone heteropoda
Phyllodoce arenae

HESIONIDAE

Gyptis vittata
Parahesione luteola

NEREIDAE

Nereis succlnea

56

GONIADIDAE

Glycinde paclfica

SPIONIDAE

Apoprionosplo pygmaea
Paraprionospio pinnata

CHAETOPTERIDAE

Chaetopterus varlopedatus
Spiochaetopterus c. oculatus

MALDANIDAE

Branchloasychls amerlcana

PECTINARIIDAE

Cistenldes gouldll

61

34

1
18

STATION 11-22

1051

sediment Type:

Weight percentages — Granules;
Silts t

Date: Sept. 19
Sands :
Clay:

Family and Species

Dredge

Shovel Net

CHRYSOPETALIDAE

Paleanothus heteroseta

2

PHYLLODOCIDAE

Phyllodoce arenae

2

21

HESIONIDAE

Gyptis vittata
Paraheslone luteola
Gyptis sp.

4
6

2

4

3

PILARGIDAE

Siqambra tentaculata

5

3

NEREIDAE

Nereis succinea

2

15

GONIADIDAE

Glvclnde paclfica

10

25

SPIONIDAE

Paraprionospio pinnata
Polvdora websterl
Prlonosplo clrrobrachlata
Prionospio h. texana
Pseudopolydora sp.

69

1

17

1
4

18
10

CHAETOPTERIDAE

Spiochaetopterus c. oculatus

17

1

CIRRATULIDAE

Tharyx sp. C

8

MALDANIDAE

Branchioasychls americana
Clymenella mucosa
Maldane sarsi

3
1

1

1052
STATION 11-22 — (Continued)

Family and Species Dredge Shovel Net

PECTINARIIDAE

Clstenides gouldii 3

STATION 11-23

1053

Sediment Type: Clayey Silt
Weight percentages — Granules: 0.6
Silts: 53.1

Date: Sept. 19
Sands: 8.6
Clay: 36.7

Family and Species

Dredge Shovel Net

PHYLLODOCIDAE

Phyllodoce arenae

HESIONIDAE

Gyptls vlttata
Paraheslone luteola

PILARGIDAE

Sigambra tentaculata

NEREIDAE

Nereis succinea

GONIADIDAE

Glycinde pacifica

22

1

1
13

20

SPIONIDAE

Paraprlonospio plnnata

CHAETOPTERIDAE

Spiochaetopterus c. oculatus

80

STATION 11-24

1054

Sediment Type: Silty Sand
Weight percentages — Granules: 0.3
Silts: 16.6

Date: Sept. 27
Sands: 69.3
Clay: 13.7

Family and Species

Dredge

Shovel Net

PHYLLODOCIDAE

Phyllodoce arenae

2

4

HESIONIDAE

Gyptis vittata
Parahesione luteola

2

3

Gyptis sp.

1

PILARGIDAE

Ancistrosvllis ionesi
Siqambra bassi
Siqambra tentaculata

6

1
2

NEREIDAE

Nereis succinea

34

89

GONIADIDAE

Glycinde pacifica

2

1

SPIONIDAE

Paraprionospio pinnata
Prionospio cirrobranchiata

105

1

17

CHAETOPTERIDAE

Spiochaetopterus c. oculatus

6

1055

STATION 11-25

Sediment Type: Sand

Weight percentages — Granules! 0.2
Silts: 5.4

Date: Sept. 27
Sands: 90.9
Clay: 3.4

Family and Species

Dredge Shovel Net

PHYLLODOCIDAE

Phvllodoce arenae

5

HESIONIDAE

Parahesione luteola

19

PILARGIDAE

Ancistrosvllis ionesi
Siqambra tentaculata

1
2

NEREIDAE

Nereis succinea

64

GONIADIDAE

Glvcinde pacifica

3

ONUPHIDAE

Diopatra cuprea

ORBINIIDAE

Scoloplos rubra

62

SPIONIDAE

Paraprionospio pinnata
Pseudopolydora sp.

161
2

CHAETOPTERIDAE

Spiochaetopterus c. oculatus

45

CIRRATULIDAE

Tharyx sp. C

10

AMPHARETIDAE

Melinna maculata

1

13

19

10

43

1056

STATION 11-26

Sediment Type: Sand Date: Sept. 27

Weight percentages — Granules: 0.6 Sands: 89.9

Silts: 5.0 Clay: 4.4

Family and Species Dredge Shovel Net

10

PHYLLODOCIDAE

Phyllodoce arenae

9

HESIONIDAE

Gyptis vlttata
Parahesione luteola

1
9

PILARGIDAE

Siqambra tentaculata

1

NEREIDAE

Laeonerels culverl
Nereis succlnea

1
58

GONIADIDAE

Glycinde paciflca

6

ONUPHIDAE

Diopatra cuprea

ORBINIIDAE

Scoloplos rubra

32

SPIONIDAE

Paraprionospio pinnata
Prlonospio cirrobranchiata

186

1

CHAETOPTERIDAE

Spiochaetopterus c. oculatus

29

CIRRATULIDAE

Tharyx sp. C

7

MALDANIDAE

Branchioasychis americana

3

17

2
10

1057

STATION 11-26 ~ (Continued)

Family and Species

Dredge Shovel Net

PECTINARIIDAE

Cistenldes gouldii

AMPHARETIDAE

Melinna maculata

10

STATION 11-27

X058

Sediment Type: Sand

Weight percentages — Granules: 0.4
Silts: 2.0

Date: Sept. 27
Sands: 96.4
Clay: 1.2

Family and Species

Dredge Shovel Net

AMPHINOMIDAE

Pseudeurythoe ambiqua

5

PHYLLODOCIDAE

Phyllodoce arenae

8

HESIONIDAE

Gvptis vittata
Parahesione luteola

6

NEREIDAE

Nereis succinea

30

NEPHTYIDAE

Aqlaophamus verrilli

1

GONIADIDAE

Glycinde pacifica

15

ONUPHIDAE

Diopatra cuprea

ORBINIIDAE

Scoloplos rubra

13

SPIONIDAE

Paraprionospio pinnata
Pseudopolydora sp.

173

1

CHAETOPTERIDAE

Spiochaetopterus c. oculatus

30

CIRRATULIDAE

Tharyx sp. C

2

20

10

13

1059
STATION 11-27 ~ (Continued)

Family and Species Dredge Shovel Net

CAPITELLIDAE

Capitella capitata 1

Capitellides jonesl 9

PECTINARIIDAE

Cistenides gouldii 8 12

STATION 11-28

1060

Sediment Type: Sand
Weight percentages —

Granules :
Silts 5

1.8
10.5

Date: Sept. 27
Sands: 85.5
Clay: 2.2

Family and Species

Dredge Shovel Net

AMPHINOMIDAE

Pseudeurythoe ambigua

PHYLLODOCIDAE

Phyllodoce arenae
Phyllodoce fraqilis

1
4

HESIONIDAE

Gyptis vittata
Paraheslone luteola

4
20

SYLLIDAE

Syllis variegata
Syllis vittata

1
27

NEREIDAE

Nereis succlnea

12

GONIADIDAE

Glyclnde paciflca

ONUPHIDAE

Dlopatra cuprea

DORVILLEIDAE

Ophryotrocha puerilis

ORBINIIDAE

Scoloplos robustus
Scoloplos rubra

SPIONIDAE

Paraprionosplo pinnata
Polydora soclalis
Polydora websteri
Prionosplo cirrobranchlata
Scolelepis squama ta
Streblosplo benedictl

8
26

4

1
1
2

1061

Station 11-28 — (Continued)

Family and Species Dredge Shovel Net

MAGELONIDAE

Magelona pettiboneae 26

CHAETOPTERIDAE

Spiochaetopterus c. oculatus 8

CAPITELLIDAE

Capitella capltata 25

Notomastus hemipodus 3

PECTINARIIDAE

Cistenides gouldil 3

SABELLIDAE

Fabricia sabella 6

STATION 11-28-1

1062

Sediment Types Sand
Weight percentages —

Date: Sept. 27

Granules :

3.6

Sands: 96.3

Silts:

0.1

Clay: 0.0

Family and Species

Dredge Shovel Net

AMPHINOMIDAE

Pseudeurythoe amblgua

PHYLLODOCIDAE

Phyllodoce arenae

HESIONIDAE

Gyptis vlttata

40

21

NEREIDAE

Nereis succinea

297

GONIADIDAE

Glyclnde paclflca

ONUPHIDAE

Dlopatra cuprea
Onuphls sp.

ARABELLIDAE

Arabella irlcolor
Drllonereis magna

DORVILLEIDAE

Dorvlllea rudolphl

ORBINIIDAE

Scoloplos robustus
Scoloplos rubra
Nalneris sp.

PARAONIDAE

Aricldea sp.

SPIONIDAE

Polydora websterl
Scolelepls squama ta

26

168

273

1

1063
STATION 11-28-1 — (Continued)

Family and Species Dredge Shovel Net

MAGELONIDAE

Magelona pettiboneae 37

CHAETOPTERIDAE

Spiochaetopterus c. oculatus 2

CAPITELLIDAE

Capltella capitata 76

Heteromastus flliformls 4

MALDANIDAE

Clymenella mucosa 20

STATION 11-28-2

1064

Sediment Type: Sand

Weight percentages — Granules: 0.0
Silts: 0.6

Date: Sept. 27
Sands: 98.9
Clay: 0.4

Family and Species

Dredge Shovel Net

PHYLLODOCIDAE

Phyllodoce arenae

HESIONIDAE

Gyptis vlttata

NEREIDAE

Nereis succlnea

43

ONUPHIDAE

Onuphls sp.

ORBINIIDAE

Scoloplos rubra

SPIONIDAE

Paraprionoaplo pinnata
Polydora websteri
Scolelepls squamata

MAGELONIDAE

Maqelona pettlboneae

1065

STATION 12-1

Sediment Types Sand Date: Oct. 23

Weight percentages — Granules: 0.6 Sands: 99.2

Silts: 0.2 Clay: 0.1

Family and Species Dredge Shovel Net

POLYNOIDAE

Harmothoe lunulata 1

PHYLLODOCIDAE

Phyllodoce arenae 6

SYLLIDAE

Syllls sp. B 51

NEREIDAE

Nereis arenaceodentata 3

Nereis p_. occldetalls 2

Nereis succinea 1

GONIADIDAE

Glyclnde paclflca 1

ONUPHIDAE

Diopatra cuprea 3

Onuphls sp. 104

ARABELLIDAE

Drllonerels magna 3

ORBINIIDAE

Scoloplos rubra 1

PARAONIDAE

Arlcidea fraqllls 2

MAGELONIDAE

Maqelona pettlboneae 7

POECILOCHAETIDAE

Poecllochaetus johnsonl 1

1066

STATION 12-1 ~ (Continued)

Family and Species Dredge Shovel Net

CHAETOPTERIDAE

Spiochaetopterus c. oculatus 1

OPHELIIDAE

Travis la sp. 2

CAPITELLIDAE

Heteromastus flllformls 1

MALDANIDAE

Clymenella mucosa 33

1067

Sediment Type: Sand
Weight percentages —

STATION 12-2

Date: Dec. 3

Granules: 0.7

Sands: 98.7

Silts: 0.4

Clay: 0.2

Family and Species

Dredge Shovel Net

SIGALIONIDAE

Sthenelals boa

PHYLLODOCIDAE

Phyllodoce arenae

SYLLIDAE

Exogone dispar

NEREIDAE

Nereis succlnea

NEPHTYIDAE

Aglaphamus verrilli

ONUPHIDAE

Onuphis nebulosa

SPIONIDAE

Polydora socialls

OPHELIIDAE

Travisia sp.

23

CAPITELLIDAE

HeteromaBtus filiformls

MALDANIDAE

Clymenella mucosa

OWENIIDAE

Owenla fuslformls

PECTINARIIDAE

Clstenides gouldli

AMPHARETIDAE

Isolda pulchella

1068

STATION 12-3

Sediment Types Sand
Weight percentages — Granules: 0.6
Silts s 0.5

Date: Dec. 3
Sands: 98.7
Clay: 0.2

Family and Species

Dredge Shovel Net

SIGALIONIDAE

Sthenelals boa

CHRYSOPETALIDAE

Paleanotus heteroseta

PHYLLODOCIDAE

Phyllodoce arenae

NEREIDAE

Nereis succlnea

NEPHTYIDAE

Aglaophamus verrilll

GLYCERIDAE

Glycera americana

ONUPHIDAE

Onuphis nebulosa

SPIONIDAE

Polydora soclalls

MAGELONIDAE

Magelona pettlboneae

CHAETOPTERIDAE

Splochaetopterus c. oculatus

OPHELIIDAE

Travlsia sp.

CAPITELLIDAE

Heteromastus fillformis

1

2

2

182

1069

STATION 12-3 ~ (Continued)

Family and Species

Dredge Shovel Net

MALDANIDAE

Clymenella mucosa

OWENIIDAE

Owenla fusiformls

AMPHARETIDAE

Isolda pulchella

TEREBELLIDAE

Pista crlstata

1070

Sediment Type: Sand

STATION 12-4

Date: Dec. 3

' Granules: 0.1

Sands: 98.9

Silts: 0.6

Clay: 0.4

Family and Species

Dredge Shovel Net

SIGALIONIDAE

Sthenelals boa

PHYLLODOCIDAE

Phyllodoce arenae

NEREIDAE

Nereis succinea

NEPHTYIDAE

Aglaophamus verrilll

CHAETOPTERIDAE

Spiochaetopterus c. oculatus

OPHELIIDAE

Travisia sp.

1
21

1071

STATION 12-5

Sediment Type: Sand
Weight percentages — Granules: 0.1
Silts: 0.6

Date: Dec. 3
Sands: 99.2
Clay: 0.1

Family and Species Dredge

Shovel Net

PHYLLODOCIDAE

Phvllodoce arenae 5

NEREIDAE

Nereis succinea 7

1

NEPHTYIDAE

Aqlaophamus verrllli 1

SPIONIDAE

Apoprionospio pyqmaea 14
Spiophanes bombyx 1

OPHELIIDAE

Travisia sp. 8

MALDANIDAE

Clymenella mucosa 11

1072

STATION 12-6

Sediment Type: Sand

Weight percentages — Granules: 0.6
Silts: 0.4

Date: Dec. 3
Sands: 98.8
Clay: 0.2

Family and Species

Dredge Shovel Net

POLYNOIDAE

Harmothoe lunulata 1

CHRYSOPETALIDAE

Paleanotus heteroseta 1

PHYLLODOCIDAE

Phyllodoce arenae 2

NEREIDAE

Nereis succinea 5

NEPHTYIDAE

Nephtvs plcta 1

ONUPHIDAE

Onuphia nebulosa 2

ARABELLIDAE

Drllonereis cylindrlca 1

SPIONIDAE

Polydora soclalis 3

CHAETOPTERIDAE

Spiochaetopterus c. oculatus

OPHELIIDAE

Travisla sp. 3

MALDANIDAE

Clymenella mucosa 21

OWENIIDAE

Owenla fuslformls

1073

STATION 12-7

Sediment Type: Sand

Weight percentages — Granules: 0.6
Silts: 0.2

Date: Dec. 3
Sands : 99 . 1
Clay; 0.2

Family and Species

Dredge Shovel Net

SIGALIONIDAE

Sthenelals boa

PHYLLODOCIDAE

Phyllodoce arenae

9

HESIONIDAE

GvPtis vittata

1

SYLLIDAE

Exoqone dlspar

1

NEREIDAE

Nereis arenaceodentata
Nereis succinea

4

9

NEPHTYIDAE

Aqlaophamus verrllli

1

ONUPHIDAE

Onuphis nebulosa

12

SPIONIDAE

Apoprionospio pyqmaea
Polvdora socialis

2

5

CHAETOPTERIDAE

Chaetopterus varlopedatus
Splochaetopterus c. oculatus

OPHELIIDAE

Travlsla sp.

CAPITELLIDAE

Heteromastus flliformls

1074

STATION 12-7 ~ (Continued)

Family and Species Dredge Shovel Net

MALDANIDAE

Clymenella mucosa 4

OWENIIDAE

Owenia fuslforrols 1

1075

STATION 12-8

Sediment Type: Sand Date: Dec. 5

Weight percentages — Granules: 1.2 Sands: 98.0

Silts: 0.5 Clay: 0.3

Family and Species Dredge Shovel Net

SIGALIONIDAE

Sthenelais boa 1

PHYLLODOCIDAE

Phyllodoce arenae 7

SYLLIDAE

Syllis sp. B 14

NEREIDAE

Nereis succinea 9

ONUPHIDAE

Onuphls nebulosa 43 1

PARAONIDAE

Cirrophorus furcatus 1

SPIONIDAE

Polvdora soclalls 1

CHAETOPTERIDAE

Chaetopterus variopedatus 1

OPHELIIDAE

Travlsia sp. 8

CAPITELLIDAE

Heteroroastus fillformls 18

MALDANIDAE

Clymenella mucosa 30

STATION 12-9

1076

Sediment Type: Sand
Weight percentages — Granules: 1.3
Silts: 0.3

Date: Dec. 5
Sands : 98 . 3
Clay: 0.1

Family and Species

Dredge Shovel Net

POLYNOIDAE

Harmothoe lunulata

SIGALIONIDAE

Sthenelais boa

PHYLLODOCIDAE

Eumida sangulnea
Phyllodoce arenae

SYLLIDAE

Exogone dispar
Syllis aclculata

NEREIDAE

Nereis succlnea

18

NEPHTYIDAE

Nephtys plcta

ONUPHIDAE

Onuphis magna
Onuphls nebulosa

SPIONIDAE

Polydora soclalis

CHAETOPTERIDAE

Chaetopterus varlopedatus
Spiochaetopterus c. oculatus

OPHELIIDAE

Travlsla sp.

1
58

CAPITELLIDAE

Heteromastus filiform Is

1077

STATION 12-9 — (Continued)

Family and Species Dredge Shovel Net

MALDANIDAE

Clymenella mucosa 46

1078

STATION 12-10

Sediment Type: Sand

Weight percentages — Granules: 1.1
Silts: 0.4

Date: Dec. 5
Sands: 98.4
Clay: 0.1

Family and Species

Dredge Shovel Net

POLYNOIDAE

Harmothoe lunulata

CHRYSOPETALIDAE

Paleanotus heteroseta

PHYLLODOCIDAE

Phyllodoce arenae

SYLLIDAE

Exogone dispar

NEREIDAE

Nereis succlnea

ONUPHIDAE

Onuphls nebulosa

SPIONIDAE

Polydora socialls
Spio setosa

CHAETOPTERIDAE

Chaetopterus variopedatus

OPHELIIDAE

Travlsla sp„

CAPITELLIDAE

Capltellides jonesi
Heteromastus filiformls

MALDANIDAE

Clymenella mucosa

59

49

3

1
18

51

1079

STATION 12-11

Sediment Type: Sand Datet Dec. 5

Weight percentages — Granules: 1.0 Sands: 98.2

Silts: 0.5 Clay: 0.2

Family and Species Dredge Shovel Net

CHRYSOPETALIDAE

Paleanotus heteroseta 4

PHYLLODOCIDAE

Phyllodoce arenae 1

SYLLIDAE

Exogone dispar 356

Syllis sp. A 1

NEREIDAE

Nereis succinea 15

Platynereis duroerllil 1

GLYCERIDAE

Glycera americana 2

ONUPHIDAE

Onuphls nebulosa 43

ORBINIIDAE

Scoloplos rubra 1

SPIONIDAE

Paraprionosplo plnnata 1

OPHELIIDAE

Travlsla sp. 1

CAPITELLIDAE

Heteromastus filiformis 23

MALDANIDAE

Clymenella mucosa 145

TEREBELLIDAE

Polycirrus eximlus 2

1080

STATION 12-12

Sediment Type: Sand

Weight percentages — Granules: 0.8
Silts: 0.3

Date: Dec. 5
Sands: 98.7
Clay: 0.2

Family and Species

Dredge Shovel Net

SIGALIONIDAE

Sthenelais boa

CHRYSOPETALIDAE

Paleanotus heteroseta

PHYLLODOCIDAE

Phvllodoce arenae

SYLLIDAE

Exogone dispar

NEREIDAE

Nereis succlnea

1

1

213

6

NEPHTYIDAE

Aglaophamus verrllll

ONUPHIDAE

Onuphls nebulosa

SPIONIDAE

Polydora soclalls

CHAETOPTERIDAE

Chaetopterus varlopedatus

OPHELIIDAE

TravlBia sp.

CAPITELLIDAE

Heteromastus flllformls

MALDANIDAE

Clymenella mucosa

OWENIIDAE

Owenls fuslformls

420

2

45

110

1081

STATION 12-13

Sediment Type: - Date: Dec. 5

Weight percentages — Granules: - Sands:

Silts: - Clay:

Family and Species Dredge Shovel Net

CHRYSOPETALIDAE

Paleanotus heteroseta 1

SYLLIDAE

Exogone dlspar 1

Syllis gracilis 1

Syllis spongicola 2

ONUPHIDAE

Onuphis nebulosa 1

LUMBRINERIDAE

Lumbrineris coccinea 2

SPIONIDAE

Polydora socialls 5

CHAETOPTERIDAE

Chaetopterus variopedatus 1

Spiochaetopterus c. oculatus 1

CIRRATULIDAE

Clrrlformla filigera 3

SABELLARIIDAE

Sabellarla floridensls 1

1082

STATION 12-14

Sediment Type: Sand

Weight percentages — Granules: 0.5
Silts: 5.8

Date: Dec. 5
Sands: 91.1
Clay: 2.6

Family and Species

Dredge Shovel Net

POLYNOIDAE

Harmothoe lunulata
Polynoid B

SIGALIONIDAE

Sthenelals boa

18

PHYLLODOCIDAE

Phyllodoce arenae

19

HESIONIDAE

Gyptis vittata

PILARGIDAE

Sigambra tentaculata

SYLLIDAE

Exogone dlspar
Syllis sp. B

NEREIDAE

Nereis succinea

23

NEPHTYIDAE

Aglaophamus verrilll
Nephtys plcta

GONIADIDAE

Glyclnde pacifica

49

1

11

ONUPHIDAE

Onuphis nebulosa

ORBINIIDAE

Scoloplos rubra

47

1083

STATION 12-14 — (Continued)

Family and Species Dredge Shovel Net

SPIONIDAE

Paraprionosplo pinnata
Polydora socialis
Polydora websteri
Pseudopolydora sp.

15
6

1
7

CHAETOPTERIDAE

Chaetopterus variopedatus
Spiochaetopterus c. oculatus

7
259

CIRRATULIDAE

Cirratulus qrandis

2

CAPITELLIDAE

Heteromastus filiformis

4

MA LD AN I DAE

Branchioasychis amerlcana

1

OWENIIDAE

Owenia fusiformis

8

AMPHARETIDAE

Isolda pulchella

10

TEREBELLIDAE

Pista palmata

2

1084

STATION 12-15

Sediment Type: Sand

Weight percentages — Granules: 0.6
Silts: 0.6

Date: Dec. 6
Sands: 98.5
Clay: 0.2

Family and Species

Dredge Shovel Net

POLYNOIDAE

Harmothoe lunulata

PHYLLODOCIDAE

Phyllodoce arenae

HESIONIDAE

Gyptls vlttata

10

SYLLIDAE

Exogone dispar
Syllis variegata

NEREIDAE

Nereis succlnea

ONUPHIDAE

Onuphls nebulosa

328

ORBINIIDAE

Scoloplos rubra

SPIONIDAE

Apoprlonosplo pyqmaea
Polydora socialls

CHAETOPTERIDAE

Chaetopterus variopedatus
Spiochaetopterus c. oculatus

CAPITELLIDAE

Heteromastus flllformls

OWENIIDAE

Owenla fusiformis

10

AMPHARETIDAE

Isolda pulchella

1085

STATION 12-16

Sediment Types Sand Date: Dec. 6

Weight percentages — Granules: 0.1 Sands: 99.9

Silts: 0.1 Clay: 0.0

Family and Species Dredge Shovel Net

HESIONIDAE

Gyptls vlttata 1

NEREIDAE

Nereis succinea 17 2

NEPHTYIDAE

Aglaophamus verrilli 3

GONIADIDAE

Glyclnde pacif ica 10

ONUPHIDAE

Dlopatra cuprea 10

Onuphis nebulosa 10

SPIONIDAE

Paraprionosplo pinna ta 2

Polydora socialis 2 1

Scolelepls squarnata 1

CHAETOPTERIDAE

Chaetopterus variopedatus 1

Spiochaetopterus c. oculatus 1

OPHELIIDAE

Travisia sp. 1

OWENIIDAE

Owenia fusiformls 2

TEREBELLIDAE

Pista palmata 1

STATION 13-1-A

1086

Sediment Types Sand
Weight percentages — Granules > 6.2
Silts: 1.0

Date: Nov. 27
Sands: 92.6
Clay: 0.2

Family and Species

Dredge Shovel Net

AHPHINOMIDAE

Pseudeurythoe amblgua

PHYLLODOCIDAE

Eteone heteropoda
Phyllodoce arenae

2

18

HESIONIDAE

Gyptls vlttata

PILARGIDAE

Cablra Incerta
Slgambra bassl

SYLLIDAE

Syllls sp. B

255

NEREIDAE

Nereis arenaceodentata
Nereis p.. occldentalls
Nereis succlnea

12

1

4

GLYCERIDAE

Glycera amerlcana

GONIADIDAE

Glvclnde pacifies

ONUPHIDAE

Dlopatra cuprea
Onuphls sp.

10
1

EUNICIDAE

Marphvsa sangulnea

ARABELLIDAE

Drllonerels magna

STATION 13-1-A — (Continued)

1087

Family and Species

Dredge Shovel Net

DORVILLEIDAE

Dorvlllea rudolphi

ORBIMIIDAE

Scoloplos rubra

PARAONIDAE

Arlcldea fragills

SPIONIDAE

Polydora socialis
Scolelepls squamata

MAGELONIDAE

Magelona pettiboneae

poecilochaetidae

Poecilochaetus Iohnsonl

CHAETOPTERIDAE

Chaetopterus varlopedatus
Spiochaetopterus c. oculatus

CIRRATULIDAE

Clrratulus grandis
Tharvx sp. C

OPHELIIDAE

Travlsla sp.

CAPITELLIDAE

Capltella capltata
Heteromastus fillformis

MALDANIDAE

Clvroenella mucosa

SABELLIDAE

Fabrlcia sabella

93
11

11

22

2

16

21

68

1088

STATION 13-1-B

Sediment Type: Sand Date: Oct. 23

Weight percentages — 'Granules i 0.4 Sands: 98.3

Silts; 0.9 Clayt 0.4

Family and Species Dredge Shovel Net

AMPHINOMIDAE

Pseudeurythoe amblqua 4

PHYLLODOCIDAE

Phyllodoce arenae 4

HESIONIDAE

Gyptis vlttata 4

PILARGIDAE

Slgambra tentaculata 1

SYLLIDAE

Syllls sp. B 10

NEREIDAE

Nereis arenaceodentata 3

ONUPHIDAE

Onuphls sp. 150

ARABELLIDAE

Drilonerels magna 1

ORBINIIDAE

Scoloplos rubra 1

PARAONIOAE

Arlcldea sp. 27

MAGELONIDAE

Magelona pettiboneae 16

OPHELIIDAE

Travlsla sp. 2

1089

STATION 13-1-B ~ (Continued

Family and Species

Dredge Shovel Net

MALDANIDAE

Clymenella mucosa

16

OWENIIDAE

Owenla fuslformis

1090

STATION 13-2

Sediment types Sand
Weight percentages — Granules i 0.1
Siltst 1.0

Date i Nov. 27
Sands t 98 . 3
Clays 0.6

Family and Species

NEREIDAE

Nereis p_. occidentalis
Platynereis dumerllii

GONIADIDAE

Glvclnde paclfica

ONUPHIDAE

Diopatra cuprea

MAGELONIDAE

Magelona pettlboneae

OPHELIIDAE

Ammotrypane aulogaster

AMPHARETIDAE

Melinna maculata

Dredge Shovel Net

1
1
1

10

1091

STATION 13-3

Sediment Typet Shelly Sand Date: Nov. 27

Weight percentages ~ Granules: 21.4 Sands: 77.8

Silts: 0.7 Clay: 0.1

Family and Species

Dredge Shovel Net

CHRYSOPETALIDAE

Paleanotus heteroseta

AMPHINOMIDAE

Pseudeurvthoe amblgua

SYLLIDAE

Exogone dlspar
Syllis sp. A
Syllls sp. B

GONIADIDAE

Gonladella sp.

ONUPHIDAE

Onuphls nebulosa
Onuphls sp.

SPIONIDAE

Polvdora eoclalls

CHAETOPTERIDAE

Chaetopterus varlopedatus

CIRRATULIDAE

Clrratulus sp. A

CAPITELLIDAE

Heteromastus flllformlB

MALDANIDAE

Clymenella mucosa

AMPHARETIDAE

Isolda pulchella

37

1

33

2

27

5
35

44
32

1
7

1092

STATION 13-3 ~ (Continued)

Family and Species Dredge Shovel Net

TEREBELLIDAE

Plsta palmata 2

SABELLIDAE

Fabricla sabella 760

STATION 13-4

1093

Sediment Types Sand
Weight percentages — Granules: 4.9
Silts: 1.4

Dates Nov. 27
Sands: 92.8
Clay: 0.9

Family and Species

Dredge Shovel Net

POLYNOIDAE

Harmothoe lunulata

SIGALIONIDAE

Sthenelais boa

PHYLLODOCIDAE

Phyllodoce arenae

SYLLIDAE

Syllls sp. A

NEREIDAE

Nereis succinea

GLYCERIDAE

Glycera americana

ONUPHIDAE

Onuphis nebulosa

13

POECILOCHAETIDAE

Poecllochaetus johnsonl

MALDANIDAE

Clymenella mucosa

OWENIIDAE

Owenla fuslformls

AMPHARETIDAE

Isolda pulchella

TEREBELLIDAE

Terebella rubra

STATION 13-5

1094

Sediment Type; Sand
Weight percentages — Granules t 1.8
Silts : 0.9

Datet Nov. 27
Sands t 97.1
Clay: 0.2

Family and Species

Dredge Shovel Net

POLYNOIDAE

Harmothoe lunulata

SIGALIONIDAE

Sthenelaia boa

CHRYSOPETALIDAE

Paleanotus heteroseta

PHYLLODOCIDAE

Phyllodoce arenae

SYLLIDAE

Exogone dlspar

NEREIDAE

Nereis auccinea

40
22

GONIADIDAE

Glycinde paclflca

ONUPHIDAE

Onuphls nebulosa

SPIONIDAE

Polydora socialls

240

CHAETOPTERIDAE

Chaetopterus variopedatus 1
Splochaetopterus c. oculatus 3

OPHELIIDAE

Travisla sp.

CAPITELLIDAE

Heteromastus fillformis

69
71

1095
STATION 13-5 ~ (Continued)

Family and Species Dredge Shovel Net

MALDANIOAE

Clyroenella mucosa 42

OWENIIDAE

Owenia fusiformis 9

AMPHARETIDAE

Isolda pulchella 6

1096
STATION 13-6

Sediment Type; Sand Date: Nov. 27

Weight percentages — Granules s 1.2 Sands s 97.9

Silts: 0.7 Clays 0.2

Family and Species Dredge Shovel Net

CHRYSOPETALIDAE

Paleanotus heteroseta 2

SYLLIDAE

Exogone dispar 1

NEREIDAE

Nereis succinea 10

ONUPHIDAE

Onuphls nebulosa 111

SPIONIDAE

Polvdora socialls 1

CHAETOPTERIDAE

Chaetopterus varlopedatus 11

OPHELIIDAE

Travlsia sp. 1

CAPITELLIDAE

Heteromastus filiformls 3

MALDANIDAE

Clymenella mucosa 40

OWENIIDAE

Owenla fuslformis 4

AMPHARETIDAE

Isolda pulchella 2

TEREBELLIDAE

Polycirrus eximius 1

1097

STATION 13-7

Sediment Type; Sand Dates Nov. 27

Weight percentages — Granules : 1.2 Sands: 97.5

Silts: 1.0 Clays 0.3

Family and Species Dredge Shovel Net

CHRYSOPETALIDAE

Paleonotus heteroseta 1

NEREIDAE

Nereis succlnea 13

NEPHTYIDAE

Aglaophamus verrilli 2

ONUPHTDAE

Onuphis nebulosa 140

CHAETOPTERIDAE

Chaetopterus varlopedatus 20

OPHELIIDAE

Travisia sp. 1

MALDANIDAE

Clymenella mucosa 65

OWENIIDAE

Owenia fuslformis 1

TEREBELLIDAE

Terebella rubra 1

1098

STATION 13-8

Datei Nov. 27

' Granules! 2.1

Sands i 96 . 8

Silts: 0.7

Clayt 0.4

Family and Species

Dredge Shovel Net

POLYNOIDAE

Harmothoe lunulata

SIGALIONIDAE

Siqalion arenicola
Pholoe sp.

1
1

CHRYSOPETALIDAE

Paleanotus heteroseta

30

PHYLLODOCIDAE

Phvllodoce arenae

1

SYLLIDAE

Exoqone dispar
Syllis sponqicola
Syllis sp. A

274

8

NEREIDAE

Nereis succinea

1

GONIADIDAE

Glycinde pacifica

3

ONUPHIDAE

Onuphis nebulosa

309

ORBINIIDAE

Scoloplos rubra

2

SPIONIDAE

Polvdora socialis
Prionospio h. texana

1

CHAETOPTERIDAE

Chaetopterus variopedatus

1

1099
STATION 13-8 — (Continued)

Family and Species Dredge Shovel Net

OPHELIIDAE

Travis la sp. 1

CAPITELLIDAE

Heteroroastua filiformls 3

MALDANIDAE

Clvmenella mucosa 17

OWENIIDAE

Owenia fuslformis 3

1100

STATION 13-9

Sediment Type: Sand Date: Dec. 2

Weight percentages — Granules i 0.3 Sands i 99.1
Silts: 0.6 Clay: 0.1

Family and Species Dredge Shovel Net

SYLLIDAE

Syllls sp. A 1

NEREIDAE

Nereis succinea 2

ONUPHIDAE

Onuphls nebulosa 15

CHAETOPTERIDAE

Chaetopterus varlopedatus 1

HALDANIDAE

Clymenella mucosa 1

OWENIIDAE

Owenla fusiform Is 3

1101

STATION 13-10

Sediment Type: Sand Date: Dec. 2

Weight percentages — Granules: 0.8 Sands: 97.7
Silts: 1.1 Clay: 0.4

Family and Species Dredge Shovel Net

POLYNOIDAE

Harmothoe lunulata 1

SIGLIONIDAE

Slgalion arenlcola 6

CHKYSOPETALIDAE

Paleanotus heteroseta 34

PHYLLODOCIDAE

Phvllodoce fragllls 3

SYLLIDAE

Syllis varlegata 1

Syllis sp. A 3

Syllis sp. B 22

NEREIDAE

Nereis succlnea 1 4

NEPHTYIDAE

Aglaophamus verrllll 1

ONUPHIDAE

Dlopatra cuprea 10

Onuphls nebulosa 59

SPIONIDAE

Polydora socialls 10

CHAETOPTERIDAE

Chaetopterus varlopedatuB 1

OPHELIIDAE

Travlsla sp. 458

1102
STATION 13-10 ~ (Continued)

Family and Species Dredge Shovel Net

CAPITELLIDAE

Heteromastua flllformls 39

MALDANIDAE

Clvmenella mucosa 11

OWENIIDAE

Owenla fuslformls 1

AMPHARETIDAE

l8olda pulchella 2

TEREBELLIDAE

Polvcirrus exlmlus 3

1103

STATION 13-11

Sediment Type: Sand Date: Dec. 2

Weight percentages — Granules: 0.0 Sands: 99.6

Silts: 0.2 Clay: 0.2

Family and Species Dredge Shovel Met

SIGALIONIDAE

SthenelalB boa 1

PHYLLODOCIDAE

Phyllodoce arenae 1

HESIONIDAE

Gyptls vittata 2

ONUPHIDAE

Diopatra cuprea 1 10

SPIONIDAE

Spio setosa 1 1

CHAETOPTERIDAE

Spiochaetopterus c. oculatus 1

1104

STATION 13-12

Sediment Typei Sand Date: Dec. 2

Weight percentages — Granules t 0.2 Sands t 98.7
Silts i 0.5 Clay » 0.6

Family and Species Dredge Shovel Net

NEREIDAE

Nereis succinea 3 1

NEPHTYIDAE

Aglaophamus verrilll 1

GLYCERIDAE

Glycera americana 4

GONIADIDAE

Glyclnde paclflca 4

ONUPHIDAE

Dlopatra cuprea 10

ORBINIIDAE

Scoloplos rubra 1

SPIONIDAE

Apoprlonosplo pygamea 8

Paraprionospio plnnata 18

Scolelepis sguamata 2

CHAETOPTERIDAE

Chaetopterus variopedatus 2 1

Splochaetopterus c. oculatus 10 1

STATION 13-13

1105

Sediment Type: Sand
Weight percentages « Granules: 0.0
Silts: 0.2

Date: Dec. 2
Sands: 99.8
Clay: 0.1

Family and Species

Dredge Shovel Net

NEREIDAE

Nereis succlnea

22

GONIADIDAE

Glyclnde pacifica

ONUPHIDAE

Dioptara cuprea
Onuphls nebulosa

10

1

SPIONIDAE

Apoprionospio pygmaea
Paraprionospio plnnata
Polydora socialls
Prlonosplo h. texana
Scolelepis squamata

MAGELONIDAE

Hagelona pettlboneae

CIRHATULIDAE

Clrratulus qrandis

CAPITELLIDAE

Capitella capltata
Capltellldes lonesi

ARENICOLIDAE

Arenlcola crlstata

MALDANIDAE

Clynienella mucosa

TEREBELLIDAE

Plsta palmata

12

1106

STATION 14-1-A

Sediment Type: Sand
Weight percentages — Granules i 0.1
Silts: 1.2

Date: Oct. 23
Sands: 98.4
Clay: 0.3

Family and Species

Dredge Shovel Net

PILARGIDAE

Slqambra tentaculata

NEREIDAE

Laeonerels culver!

QONIADIDAE

Glyclnde paclflca

ONUPHIDAE

Dlopatra cuprea

ORBINIIDAE

Scoloplos robustus
Scoloplos rubra

2

4

PARAONIDAE

Aricldea fragills

SPIONIDAE

Polydora soclalis

MAGELONIDAE

Magelona pettlboneae

CHAETOPTERIDAE

Spiochaetopterus c. oculatus

10

CIRRATULIDAE

Clrratulus qrandls

40

CAPITELLIDAE

Capitella capitata
Heteroroastus fillformis

1107

STATION 14-1-A — (Continued)

Family and Species

Dredge Shovel Net

ARENICOLIDAE

Arenicola crlstata

MALDANIDAE

Clvmenella mucosa

1108

STATION 14-1-B

Sediment Types Sand Dates Oct. 23

Weight percentages — Granules s 0.1 Sands s 98.7

Silts s 0.9 Clays 0.2

Family and Species Dredge Shovel Net

ARENICOLIDAE

Arenlcola crlstata 10

1109

STATION 14-2

Sediment Types Sand Dates Nov. 20

Weight percentages — Granules; 0.4 Sands: 87.8

Siltst 9.1 Clayt 2.7

Family and Species Dredge Shovel Net

POLYNOIDAE

Polynoid B 4

SIGALIONIDAE

Sthenelals boa 2

PHYLLODOCIDAE

Phyllodoce arenae 7

HESIONIDAE

Gyptls vlttata 1

NEREIDAE

Nereis succlnea 9 5

NEPHTYIDAE

Nephtvs plcta 1

GONIADIDAE

Glyclnde paclflca 21

ONOPHIDAE

Dlopatra cuprea 20 10

Onuphls sp. 1

PARAONIDAE

Arlcldea fragllls 1

SPIONIDAE

Apoprlonosplo pygmaea 2

Paraprlonosplo plnnata 357 6

Polydora soclalls 3 2

CHAETOPTERIDAE

Chaetopterus varlopedatUB 1

Splochaetopterus c. oculatus 10 1

1110
STATION 14-2 ~ (Continued)

Family and Species Dredge Shovel Net

CIRRATULIDAE

Clrratulus grandis 1

Tharyx sp. C 101

CAPITELLIDAE

Capitella capita ta 2

MALDANIDAE

Branchioasychls amerlcana 4

SABELLARIIDAE

Sabellaria floridensls 25

PECTINARIIDAE

Cistenides gouldii 1

TEREBELLIDAE

Pista palmata 2

SABELLIDAE

Branchiomma nigromaculata 2
Megalomma bioculatum 8

1111

STATION 14-3

Sediment Type: Sand
Weight percentages — Granules i 1.9
Silts: 2.4

Date: Nov. 20
Sands: 94.9
Clay: 0.6

Family and Species

Dredge Shovel Net

POLYNOIDAE

Lepldonotus sublevls

SIGALIONIDAE

Sthenelais boa

PHYLLODOCIADE

Phyllodoce arenae
Phyllodoce fraerllls

HESIONIDAE

Podarke obscura

SYLLIDAE

Autolvtus cornutus
Exogone dlspar

NEREIDAE

Nereis succlnea

NEPHTYIDAE

Aglaophamus verrilli

GLYCERIDAE

Glycera americana

GONIADIDAE

Glyclnde paclflca

ONUPHIDAE

Dlopatra cuprea
Onuphls sp.

ARABELLIDAE

Drllonerels magna

26

7
10

11

2
20

1112

STATION 14-3 — (Continued)

Family and Species

Dredge Shovel Net

SPIONIDAE

Paraprionosoio plnnata
Polydora socialis

37

1

CHAETOPTERIDAE

Chaetopterus variopedatus
Spiochaetopterus c. oculatus
Mesochaetopterus sp. A

1

3

1

1

CIRRATULIDAE

Cirratulus qrandls
Clrriformls filiqera
Tharyx sp. c

22

2

10

OPHELIIDAE

Travisla sp.

13

MALDANIDAE

Branchloasychis americana
Clymenella mucosa

4
3

SABELLARIIDAE

Sabellaria floridensis

25

AMPHARETIDAE

Isolda pulchella

1

SABELLIDAE

Meqalomma bioculatum

1

1113

STATION 14-4

Sediment Type: Sand Date: Nov. 20

Weight percentages — Granules: 0.8 Sands: 92.8

Silts: 4.2 Clay: 2.2

Family and Species

Dredge Shovel Net

SIGALIONIDAE

Sthenelais boa

PHYLLODOCIDAE

Eumlda sanquinea

3

Phyllodoce arenae

7

HESIONIDAE

Podarke obscura

2

PILARGIDAE

Cabira incerta

1

Siqambra tentaculata

3

NEREIDAE

Nereis arenaceodentata

3

Nereis p. occidentalis

5

Nereis succinea

21

Platvnereis dumerilii

GLYCERIDAE

Glvcera americana

12

GONIADIDAE

Glycinde pacifica

43

ONUPHIDAE

Diopatra cuprea

2

Onuphis sp.

15

ORBINIIDAE

Scoloplos robustus

26

Scoloplos rubra

6

SPIONIDAE

Paraprionospio pinnata

188

Polydora socialis

11

Prionospio h. texana

1

10

1114

STATION 14-4 ~ (continued)

Family and Species Dredge Shovel Net

CHAETOPTERIDAE

Chaetopterus variopedatus 1 1

Spiochaetopterus c. oculatus 4 1

Mesochaetopterus sp. A 1

CIRRATULIDAE

Clrratulus grandls 15

Tharyx sp. C 38

OPHELIIDAE

Ammotrypane aulogaster 1

Armandla agills 4

CAPITELLIDAE

Capitellldes lonesl 1

MALDANIDAE

Branchioasychls americana 17

SABELLARIIDAE

Sabellarla florldensis 40

AMPHARETIDAE

Isolda pulchella 1

SABELLIDAE

Branchiomnia nlgromaculata 23 10

Megalomma bioculatum 3

1115

STATION 14-5

Sediment Types Sand
Weight percentages — Granules s
Silts:

0.4
1.4

Date: Nov. 20
Sands: 97.9
Clay: 0.3

Family and Species

Dredge

Shovel

Net

POLYNOIDAE

Lepidonotus variabilis

1

SIGALIONIDAE

Sthenelais boa

3

PHYLLODOCIDAE

Phvllodoce arenae

20

2

SYLLIDAE

Exoqone dlspar

5

1

NEREIDAE

Nereis arenae eodentata

7
3
1

Nereis p. occidentalis
Nereis succinea
Platvnereis dumerilli

1
3

5

GLYCERIDAE

Glycera americana

9

GONIADIDAE

Glycinde pacifica

26

1

ONUPHIDAE

Diopatra cuprea
Onuphis so.

106

10

ORBINIIDAE

Scoloplos rubra

2

PARAONIDAE

Aricldea sd.

1

SPIONIDAE

Apoprionospio pyqmaea
Polydora websteri
Pseudopolydora sp.

11

1

1

1116

STATION 14-5 ~ (Continued)

Family and Species Dredge Shovel Net

POECILOCHAETIDAE

Poecllochaetus Johns oni

CHAETOPTERIDAE

Spiochaetopterus c. oculatus

2

OPHELIIDAE

Amniotrvpane auloqaster

Armandia aqilis
Travis la sp.

9
390

CAPITELLIDAE

Heteromastus filiformls

2

MALDANIDAE

Clymenella mucosa

48

SABELLARIIDAE

Sabellarla qracilis

PECTINARIIDAE

Clstenldes qouldll

1

AMPHARETIDAE

Isolda pulchella

1

1117

STATION 14-6

Sediment Types Sand
Weight percentages — Granules t 11.2
Silts: 2.3

Datei Nov. 20
Sands t 85.9
Clays 0.6

Family and Species

Dredge Shovel Net

SIGALIONIDAE

Sthenelais boa

PHYLLODOCIDAE

Bum Ida sanquinea
Phyllodoce arenae
Phyllodoce fragilis

HESIONIDAE

Podarke obscura

SYLLIDAE

Exoqone dlspar

NEREIDAE

Nereis arenaceodentata
Nereis p. occldentalis
Nereis succinea

NEPHTYIDAE

Aglaophamus verrilll

GLYCERIDAE

Glycera americana

GONIADIDAE

Glycinde pacifica

ONUPHIDAE

Onuphis sp.

12

4

3

2

9

ORBINIIDAE

Scoloplos robust us
Scoloplos rubra

18
10

1118

STATION 14-6 — (Continued)

Family and Species Dredge Shovel Net

SPIONIDAE

Prlonospio h. texana

CHAETOPTERIDAE

Splochaetopterus c. oculatus

1

CIRRATULIDAE

Clrratulus qrandis

16

OPHELIIDAE

Armandia aqilis
Travis ia sp.

2

16

MALDANIDAE

Branchioasvchis americana
Clymenella mucosa

2

130

SABELLARIIDAE

Sabellaria qracllis

1

AMPHARETIDAE

Isolda pulchella

8

TEREBELLIDAE

Pista palmata
Thelepus setosus

1

STATION 14-7

1119

Sediment Type* Sand

Weight percentages — Granules: 0.1
Silts: 1.1

Date: Nov. 20
Sand: 98.4
Clay: 0.3

Family and Species

Dredge Shovel Net

PHYLLODOCIDAE

Phyllodoce arenae

NEPHTYIDAE

Aglaophamus verrilll

GONIADIDAE

Glycinde paclfica

ONUPHIDAE

Diopatra cuprea

ORBINIIDAE

Scoloplos robustus

SPIONIDAE

Spio setosa

OPHELIIDAE

Armandla agilis
Travisla sp.

MALDANIDAE

Clymenella mucosa

OWENIIDAE

Owenia fusiformls

13

1120

STATION 14-8

Sediment Type: Sand Date: Nov. 20

Weight percentages — Granules: 0.1 Sands: 99.0

Silts: 0.7 Clay: 0.2

Family and Species

Dredge Shovel Net

PHYLLODOCIDAE

Phyllodoce arenae

SYLLIDAE

Syllls sp. B

NEREIDAE

Nereis succinea

NEPHTYIDAE

Aglaophamus verrllll

GONIADIDAE

Glycinde paclf ica

ORBINIIDAE

Scoloplos robustus

SPIONIDAE

Apoprionospio pygmaea
Paraprionospio pinnata

7
43

OPHELIIDAE

Ammotrypane aulogaster
Travisia sp.

1
20

MALDANIDAE

Clymenella mucosa

209

10

OWENIIDAE

Owenia fuslformls

STATION 14-9

1121

Sediment Types Shelly Sand
weight percentages — Granules < 12.6
Silts i 1.7

Date: Nov. 21
Sands t 85.1
Clays 0.5

Family and Species

Dredge Shovel Net

SIGALIONIDAE

Sthenelals boa

PHYLLODOCIDAE

Euroida sanguinea
Phyllodoce arenae

1
1

SYLLIDAE

Syllls annularis

NEREIDAE

Nereis arenaceodentata
Nereis succinea
Platynerels dumerllii

NEPHTYIDAE

Aglaophamus verrilll

LUMBRINERIDAE

Lumbrinerls erecta

ORBINIIDAE

Scoloplos robustus
Scoloplos rubra

14
2

CHAETOPTERIDAE

Chaetopterus varlopedatus

FLABELLIGERIDAE

Pherusa arenosa

OPHELIIDAE

Armandia agllla
Travisia sp.

6

4

SABELLARIIDAE

Sabellaria gracilis

1122
STATION 14-9 ~ (Continued)

Family and Species Dredge Shovel Net

AMPHARETIDAE

Isolda pulchella

1123

STATION 14-10

Sediment Type: Sand
Weight percentages — Granules:
Silts:

0.9
2.5

Date: Nov. 21
Sands: 95.1
Clay: 0.7

Family and Species

Dredge

Shovel Net

SIGALIONIDAE

Sthenelais boa

6

PHYLLODOCIDAE

Phyllodoce arenae
Phyllodoce fraqilis

2

1

SYLLIDAE

Exoqone dispar
Syllis aciculata

4
11

NEREIDAE

Nereis succinea

16

NEPHTYIDAE

Aqlaophamus verrilll

28

ONUPHIDAE

Diopatra cuprea
Onuphis nebulosa

1
50

LUMBRINERIDAE

Lumbrineris erecta

2

ORBINIIDAE

Scoloplos rubra

4

CHAETOPTERIDAE

Chaetopterus variopedatus
Spiochaetopterus c. oculatus

1

1

OPHELIIDAE

Armandia aqilis
Travisla sp.

6
3

1124

STATION 14-10 — (Continued)

Family and Species Dredge Shovel Net

CAPITELLIDAE

Heteromastus fillformia 2

MALDANIDAE

Clymenella mucosa 17

AMPHARETIDAE

Isolda pulchella 4

SABELLIDAE

Fabrlcla sabella 26

1125

STATION 14-11

Sediment Types Sand
Weight percentages — Granules: 2.5
Silts i 0.9

Date: Nov. 21
Sands: 96.4
Clay: 0.2

Family and Species

SIGALIONIDAE

Sigalion arenicola

PHYLLODOCIDAE

Phyllodoce arenae

SYLLIDAE

Exogone dispar
Syllls sp. A

SEREIDAE

Nereis succinea

Dredge Shovel Net

4

4

ONUPHIDAE

Diopatra cuprea 1

Onuphis magna 1

Onuphis nebulosa 100

ARABELLIDAE

Arabella iricolor X

CHAETOPTERIDAE

Chaetopterus variopedatus 12
Spiochaetopterus c. oculatus 1

FLABELLIGERIDAE

Pherusa arenosa \

OPHELIIDAE

Travisla sp. 2

AMPHARETIDAE

Isolda pulchella 1

1126

STATION 14-

-12

Sediment Types Sand
Weight percentages — Granules
Silts s

4.2

0.8

Datet Nov. 21
Sands j 94.7
Clays 0.3

Family and Species

Dredge

Shovel Net

POLYNOIDAE

Harmothoe lunulata

1

SIGALIONIDAE

Siqalion arenicola

3

CHKYSOPETALIDAE

Paleanotus heteroseta

5

PHYLLODOCIDAE

Eumida sanquinea

1

SYLLIDAE

Exoqone dispar
Svllis SP. A

12

34

NEREIDAE

Nereis succinea

2

GONIADIDAE

Glycinde pacifica

5

ONUPHIDAE

Diopatra cuprea
Onuphis nebulosa

1
62

CHAETOPTERIDAE

Mesochaetopterus sp. A

1

OPHELIIDAE

Armandia aqilis
Travisia sp.

4
18

CAPITELLIDAE

Heteromastus filiformis

1

1127

STATION 14-12 — (Continued)

Family and Species Dredge Shovel Net

MALDANIDAE

Clvmenella mucosa

TEREBELLIDAE

Polvclrrus exlmlus

STATION 14-13

1128

Sediment Type: Sand
Weight percentages — Granules i 3.2
Silts i 2.5

Date: Nov. 21
Sands: 93.0
Clay: 1.2

Family and Species

Dredge Shovel Net

POLYNOIDAE

Lepldonotus variabilis

PHYLLODOCIDAE

Eumida sanqulnea

HESIONIDAE

Podarke obscura

SYLLIDAE

Svllis aciculata

NEREIDAE

Nereis succinea

NEPHTYIDAE

Aglaophamus verrilli

ONUPHIDAE

Dlopatra cuprea

EUNICIDAE

Eunice rubra

17

15

LUMBRINERIDAE

Lumbrinerls baa si 1

Lumbrinerls erecta 1

ORB INI ID AE

Scoloplos rubra 1

CHAETOPTERIDAE

ChaetopteruB varlopedatus 21
Splochaetopterus c. oculatus 2

1129

STATION 14-13 — (Continued)

Family and Species

FLABELLIGERIDAE

Pherusa arenosa

Dredge Shovel Net

OPHELIIDAE

Armandla agills
Travisla sp.

MALDANIDAE

Clymenella mucosa

AMPHARETIDAE

Isolda pulchella

TEREBELLIDAE

Lolmla medusa

9

1

1130

STATION 14-14

Sediment Type: Sand Date: Nov. 26

Weight percentages — Granules: 1.5 Sands: 97.7

Silts: 0.6 Clay: 0.3

Family and Species

Dredge Shovel Net

SIGALIONIDAE

Slgalion arenicola

PHYLLODOCIDAE

Phvllodoce arenae

SYLLIDAE

Syllis sp. A

NEPHTYIDAE

Aglophamus verrllli
Nephtys plcta

ONUPHIDAE

Onuphls nebulosa

ORBINIIDAE

Scoloplos rubra

OPHELIIDAE

Armandia agills
Travis ia sp.

MALDANIDAE

Clymenella mucosa

AMPHARETIDAE

Isolda pulchella

39

4

3

1

1131

STATION 14-15

Sediment Type: Sand

Weight percentages — Granules: 0.6
Silts: 0.6

Date: Nov. 26
Sands: 98.6
Clay: 0.2

Family and Species

Dredge Shovel Net

SIGALIONIDAE

Sigallon arenlcola 2

SYLLIDAE

Exogone dispar 10

Syllis sp. A 1

Syllis sp. B 24

NEREIDAE

Nereis succinea 4

ONUPHIDAE

Onuphls nebulosa 8

LUMBRINERIDAE

Lumbrineris latrellll 2

CHAETOPTE RIDAE

Chaetopterus varlopedatus 7
Spiochaetopterus c. oculatus 1

OPHELIIDAE

Armandia agills 2

Travis la sp. 19

MALDANIDAE

Clymenella mucosa 40

OWENIIDAE

Owenla fusiformis 5

AMPHARETIDAE

Isolda pulchella

1132

STATION 14-16

Sediment Type: Sand
Weight percentages — Granules j 0.7
Silts « 1.3

Date: Nov. 26
Sands: 97.5
Clay: 0.4

Family and Species

Dredge Shovel Net

POLYNOIDAE

Harmothoe lunulata

SIGALIONIDAE

Sthenelais boa

PHYLLODOCIDAE

Phyllodoce arenae
Phvllodoce fragilis

SYLLIDAE

Autolvtus cornutus

NEREIDAE

Nereis arenaceodentata
Nereis succinea

ORBINIIDAE

Scoloplus robustus
Scoloplos rubra

PARAONIDAE

Aricldea fragilis

SPIONIDAE

Apoprionosplo pygmaea

OPHELIIDAE

Armandia agilis
Travisla sp.

CAPITELLIDAE

Notomastus latericeue

MALDANIDAE

Clvmenella mucosa

1
13

13

3

1133

STATION 14-16 — (Continued)

Family and Species Dredge Shovel Net

OWENIIDAE

Owenla fusiformia 10

APHARETIDAE

Isolda pulchella 5

SABELLIDAE

Fabricia sabella 1

1134

STATION 14-17

Sediment Type: Sand
Weight percentages —

Granules :
Silts t

1.0
0.3

Date: Nov. 26
Sands: 98.5
Clay: 0.2

Family and Species

Dredge Shovel Net

POLYNOIDAE

Harmothoe lunulata

PHYLLODOCIDAE

Phyllodoce arenae

NEREIDAE

Nereis p_. occidentalis
Nereis succinea
Platynerels dumerilli

NEPHTYIDAE

Aglaophamus verrilll

GONIADIDAE

Glvclnde pacifica

ORBINIIDAE

Scoloplos robustus

SPIONIDAE

Apoprlonospio pygmaea
Polydora soclalis
Scolelepls squamata

OPHELIIDAE

Armandia aqllis
Travlsia sp.

MALDANIDAE

Clvmenella mucosa

OWENIIDAE

Owenla fuslformls

1
1

3
1
3

2
17

14

1135

STATION 14-18

Sediment Types Sand Datei Nov. 26

Weight percentages — Granules j 0.1 Sands > 98.0

Silts: 1.4 Clayj 0.5

Family and Species Dredge Shovel Net

PHVLLODOCIDAE

Eumlda sangulnea

Phyllodoce arenae 1

NEREIDAE

Platynerels dumerilli

GONIADIDAE

Glycinde pacifica 33

ORBINIIDAE

Scoloplos rubra 3

PARAONIDAE

Arlcldea fragilis 1

SPIONIDAE

Apoprlonospio pvgmaea 12

CHAETOPTERIDAE

Spiochaetopterus c. oculatus 12

CIRRATULIDAE

Cirratulus grandls 24

STATION 14-19

1136

Sediment Type: Sand
Weight percentages — Granules t 0.1
Silts: 0.7

Date: Nov. 26
Sands s 99.1
Clay: 0.1

Family and Species

Dredge Shovel Net

PHYLLODOCIDAE

Eteone heteropoda
Phyllodoce arenae

HESIONIDAE

Podarke obscura

NEREIDAE

Nereis succlnea

GONIADIDAE

Glycinde pacifica

ORBINIIDAE

Scoloplos robustus

SPIONIDAE

Paraprlonosplo pinnata
Scolelepls squamata

CIRRATULIDAE

Tharyx sp. C

CAPITELLIDAE

Heteromastus filiformls

ARENICOLIDAE

Arenicola crista ta

12

12

STATION 14-20

1137

Sediment Type: Sand

Weight percentages — Granules: 0.4
Silts: 0.1

Date: Nov. 26
Sands: 99.5
Clay: 0.0

Family and Species

Dredge Shovel Net

NEREIDAE

Nereis arenaceodentata
Nereis succinea

1
1

SPIONIDAE

Paraprionospio plnnata
Scolelepis squamata

1
5

OPHELIIDAE

Travlsia sp.

STATION 15-1

1138

Sediment Type: Sand

Weight percentages — Granules: 4.7
Silts: 6.1

Date: Sept. 26
Sands: 88.4
Clay: 0.8

Family and Species

Dredge Shovel Net

HESIONIDAE

Gyptis vittata

NEREIDAE

Nereis arenaceodentata
Nereis p_. occidentalls
Nereis succinea

ONUPHIDAE

Diopatra cuprea

DOKVILLEIDAE

Dorvlllea rudolphl

ORBINIIDAE

Scoloplos rubra

PARAONIDAE

Aricidea fraqilis

SPIONIDAE

Apoprionospio pygmaea
Paraprionospio pinnata

SPIONIDAE

Polydora socialls
Polydora websteri
Prionospio cirrobranchiata
Prlonosplo h. texana
Streblospio benedict!

POECILOCHAETIDAE

Poecilochaetus Johns onl

1
1

2
42

6

1

41

12

20
6

1139
STATION 15-1 — (Continued)

Family and Species Dredge Shovel Net

CHAETOPTERIDAE

Chaetopterus variopedatus
Spiochaetopterus c. oculatua 3

CIRRATULIDAE

Clrrlformla flllgera X

CAPITELLIDAE

Capitella capltata 5

Notomastus laterlceus 4

MALDANIDAE

Clymenella mucosa 2

Maldane sarsl 1

PECTINARIIDAE

Clstenides gouldll 2

SABELLIDAE

Branchiomma nigromaculata i

SERPULIDAE

EupomatuB dianthus

STATION 15-2

1140

Sediment Type: Sand

Weight percentages — Granules: 2.1
Silts: 0.3

Date: Sept. 26
Sands: 97.5
Clay: 0.2

Family and Species

Dredge Shovel Net

PHYLLODOCIDAE

Eteone heteropoda

SYLLIDAE

Svllls varlegata

NEREIDAE

Laeonerels culverl
Nereis arenaceodentata

GONIADIDAE

Glycinde pacifica

ONUPHIDAE

Onuphis sp.

ORBINIIDAE

Scoloplos robustus
Scoloplos rubra

PARAONIDAE

Aricldea fragilis

SPIONIDAE

Polvdora socialls

SPIONIDAE

Prionosplo h. texana
Scolelepls squama ta
Streblosplo benedlctl

MAGELONIDAE

Maqelona pettlboneae

45
15

129

42
2

51

1141
STATION 15-2 — (continued)

Family and Species Dredge Shovel Net

CAPITELLIDAE

Capitella capltata 11

Heteroroastus filiformls 22
Notoroastus latericeus 2

MALDANIDAE

Clymenella mucosa 4 10

STATION 15-3

1142

Sediment Type: Sand
Weight percentages — Granules i 3.4
Silts j 11.8

Date: Sept. 26
Sands : 82.3
Clay: 2.4

Family and Species

Dredge Shovel Net

PHYLLODOCIDAE

Eumida sangulnea

HESIONIDAE

Gyptis vittata

SYLLIDAE

Exocrone dispar
Syllis sp. B

NEREIDAE

Laeonereis culveri
Nereis p.« occidental is

ONUPHIDAE

Diopatra cuprea
Onuphis nebulosa
Onuphis sp.

EUNICIDAE

Marphysa sangulnea

ARABELLIDAE

Drllonereis cylindrica

DORVILLEIDAE

Dorvillea rudolphl

ORBINIIDAE

Scoloplos robustus
Scoloplos rubra

PARAONIDAE

Aricldea fragllls

11

4
8

4

5

29

10

1143

STATION 15-3 — (Continued)

Family and Species

Dredge Shovel Net

SPIONIDAE

Apoprionosplo pyqmaea

1

Paraprionospio pinnata

2

Polvdora socialls

1

Prionospio cirrobranchlata

2

Prionosplo h. texana

3

Streblosplo benedicti

1

Pseudopolydora sp.

2

MAGELONIDAE

Maqelona pettiboneae

CHAETOPTERIDAE

Chaetopterue varlopedatus
Splochaetopterus c. oculatus

CIRRATULIDAE

Tharyx sp. C

CAPITELLIDAE

Capltellldes ionesl
Heteromastus flllformls

29

MALDANIDAE

Branchloasychls amerlcana
Clymenella mucosa

AMPHARETIDAE

Mellnna maculata

10

TEREBELLIDAE

Thelepus setosus

SABELLIDAE

Branchiomma nlgromaculata

2910

506

10

1144

STATION 15-4

Sediment Type: Sand Date. Septf 26

Weight percentages ~ Granules: 9.7 Sands: 83.7
Silts: 5.7 Clay: l!o

Family and Species

Dredge Shovel Net

POLYNOEDAE

Polynoid B

1

PHYLLODOCIDAE

Eumida sanquinea

1

NEREIDAE

Nereis arenaceodentata

2

1

Nereis p. occidentalis

Nereis succinea

6

GLYCERIDAE

Glycera aroerlcana

1

GONIADIDAE

Glycinde pacifica

4

ONUPHIDAE

Diopatra cuprea

13

10

Onuphis sp.

4

DORVILLEIDAE

Dorvillea rudolphi

2

PARAONIDAE

Aricidea fraqilis

7

SPIONIDAE

Apoprionospio pyqmaea

3

Dispio uncinata

1

Paraprionospio pinna**

50

Polvdora socialis

5

Polydora websteri

17

Prionospio cirrobranchiata

4

Prionospio h. texana

1

Streblospio benedlrH

163

Pseudopolydora sp.

10

1145

STATION 15-4 — (Continued)

Family and Species Dredge Shovel Net

CHAETOPTERIDAE

Chaetopterus varlopedatus 1 1

Spiochaetopterus c. oculatus 3 1

CIRRATULIDAK

Cirratulus grandis 1

Cirratulus sp. D 1

Tharvx sp. C 38

CAPITELLIDAE

Capitellides lonesi 1

Heteroniastus fillformls 14

Notoniastus laterlceus 1

MALDANIDAE

Clymenella zonalis 1

OWENIIDAE

Owenia fusiformis 1

PECTINARIIDAE

Cistenldes gouldil 1

TEREBELLIOAE

Pista palmata 1

SABELLIDAE

Branchiomma nigromaculata 72 10

Meqalomma bloeulatum 3

1146

STATION 15-5

Sediment Type: Sand
Weight percentages — Granules s 0.6
Silts » 8.9

Date: Sept. 26
Sands: 89.1
Clay: 1.4

Family and Species

POLYNOIDAE

Harroothoe lunula ta
Polynoid B

Dredge Shovel Net

PHYLLODOCIDAE

Phvllodoce fragilis

HESIONIDAE

Gyptis vittata

PILARGIDAE

Anclstrosvllis jonesl

NEREIDAE

Ceratonereis irritabills
Nereis succinea

3
2

GONIADIDAE

Glvclnde paciflca

EUNICIDAE

Marphysa sangulnea

PARAONIDAE

Arlcidea fragilis

SPIONIDAE

Apoprlonosplo pygmaea
Paraprionospio pinnata
Polydora socialls
Prionospio cirrobranchiata
Streblospio benedicti
Pseudopoiydora sp.

■ 1
289

3

9

84

7

1147
STATION 15-5 — (Continued)

Family and Species Dredge Shovel Net

CHAETOPTERIDAE

Chaetopterus varipedatus 1 1

Splochaetopterua c. oculatus 4 1

CIRRATULIDAE

Tharyx sp. C 37

CAPITELLIDAE

Capitella capitata 1

Heteromastus flliformis 1

MALDANIDAE

Clymenella mucosa 2

SABELLARIIDAE

Sabellaria floridensls 6

SABELLIDAE

Branchiomma nlgromaculata 5 10

1148

STATION 15-6

Sediment Type: Sand
Weight percentages — Granules: 2.6
Silts: 5.7

Date: Sept. 26
Sands: 90.7
Clay: 1.0

Family and Species

Dredge Shovel Net

POLYNOIDAE

Polynoid B

SIGALIONIDAE

Sthenelais boa

2

4

PHYLLODOCIDAE

Paranaites speciosa
Phyllodoce fraqilis

1
20

HESIONIDAE

Gyptis vittata

PILARGIDAE

Ancistrosvllis ionesi
Sigambra tentaculata

NEREIDAE

Nereis arenaceodentata
Nereis p_. occidentalls
Nereis succinea

10
3

NEPHTYIDAE

Aglaophamus verrilll

GONIADIDAE

Glycinde pacifica

2

13

ONUPHIDAE

Onuphis nebulosa

LUMBRINERIDAE

Lumbrinerls sp.

ORBINIIDAE

Scoloplos robustus
Scoloplos rubra

1149
STATION 15-6 — (Continued)

Family and Species Dredge Shovel Net

PARAONIDAE

Arlcidea frag ills 4

SPIONIDAE

Apoprlonospio pygmaea 2

Paraprionospio pinnata 18

Polydora sociali3 4 3

Polydora websteri 2

Prlonospio cirrobranchiata 1

Spiophanes bombyx 1

Steblospio benedictl 9

MAGELONIDAE

Hagelona pettlboneae 2

CHAETOPTERIDAE

Chaetopterus variopedatus 1 1

Splochaetopterus c. oculatus 1

CIRRATULIDAE

Cirratulus grandis 11

Tharyx sp. C 38 1

CAP1TELLIDAE

Heteromastus filiformis 1

MALDANIDAE

Branchioasychis americana 8
Clymenella mucosa 17

SABELLARIIDAE

Sabellaria floradenais 3

Sabellaria gracilis 10

PECTINARIIDAE

Cistenides gouldii 3

TEREBELLIDAE

Terebella rubra 1

1150
STATION 15-6 — (Continued)

Family and Species Dredge Shovel Net

SABELLIDAE

Branchlomma nigramaculata 10

Megalonroa bloculatum 8

Stella mlcrophthalma 1

1151

STATION 15-7

Sediment Types Shelly Sand Date: Sept. 26

Weight percentages — Granules: 29.4 Sands: 70.6

Silts: 0.0 Clay: 0.0

Family and Species Dredge Shovel Net

LUMBRINERIDAE

Lumbrineris impatiens 3

SPIONIDAE

Scolelepis sguamata 10

CHAETOPTERIDAE

Spiochaetopterus c. oculatus 1

1152

STATION 15-8

Sediment Type: Sand
Weight percentages — Granules: 0.8
Silts: 5.3

Date: Sept. 26
Sands: 93.5
Clay: 1.1

Family and Species

Dredge Shovel Net

POLYNOIDAE

Polynold B

PHYLLODOCIDAE

Paranaltes speciosa

HESIONIDAE

Podarke obscura

PILARGIDAE

Sigambra tentaculata

NEREIDAE

Nereis succinea

GONIADIDAE

Glyclnde paclfica

13

ONUPHIDAE

Diopatra cuprea
Onuphis sp.

10

EUNICIDAE

Marphysa sangulnea

ORBINIIDAE

Scoloplos robustus

PARAONIDAE

Arlcldea fragilis

1153
STATION 15-8 ~ (Continued)

Family and Species Dredge Shovel Net

SPIONIDAE

Apoprlonospio pygroaea 2

Paraprlonosplo plnnata 135 3

Polydora socialls 2

Polydora websterl 1

Prlonosplo cirrobranchlata 5

Scolelepls Bquamata 1

Splophanes bombyx 1

Streblosplo benedlctl 56

Pseudopolvdora sp. 4

POECILOCHAETIDAE

Poecilochaetus johnsonl 1

CHAETOPTERIDAE

Chaetopterus varlopedatus 5 1

Splochaetopterus c. oculatus 2 1

CIRRATULIDAE

Clrratulus grandls 4

Tharyx sp. C 51

OPHELIIDAE

Travlsla sp. 1

CAPITELLIDAE

Heteromastus flllformls 1

MALDANIDAE

Clymenella mucosa 3

PECTINARIIDAE

Clstenldes gouldll 3

TEREBELLIDAE

Plsta crlstata 1

SABELLIDAE

Megalomma bloculatum 3

STATION 15-9

1154

Sediment Type: Sand

Weight percentages — Granules: 0.4
Silts: 0.2

Date: Sept. 26
Sands: 99.4
Clay: 0.2

Family and Species

Dredge Shovel Net

PHYLLODOCIDAE

Eteone heteropoda

PILARGIDAE

Sigambra bassi

ONUPHIDAE

Onuphis nebulosa

ORBINIIDAE

Scoloplos rubra

PARAONIDAE

Aricidea fraqilis

SPIONIDAE

Apoprionospio pygmaea
Paraprionospio plnnata
Polydora socialis
Scolelpis squama ta
Streblospio benedictl
Pseudopolydora sp.

10
10
6
2
2
1

MAGELONIDAE

Maqelona pettlboneae

POECILOCHAETIDAE

Poecilochaetus iohnsoni

CHAETOPTERIDAE

Spiochaetopterus c. oculatus

CIRRATULIDAE

Clrratulus grandls
Tharyx sp. C

1
4

1155
STATION 15-9 ~ (Continued)

Family and Species Dredge Shovel Met

OPHELIIDAE

Ammotrypane aulogaster 1

CAPITELLIDAE

Heteroroastus fillformlB 2

Notomastus latericeus 2

AMPHARETIDAE

Isolda pulchella !

TEREBELLIDAE

Loimia vlrldl8 i

1156

STATION 15-10

Sediment Type: Sand Dates Oct. 2

Weight percentages — Granules! 0.6 Sandsi 98.8

silts: 0.5 Clayj 0.1

Family and Species Dredge Shovel Net

PHYLLODOCIDAE

Eteone heteropoda 1

ONUPHIDAE

Dlopatra cuprea 2

LUMBRINERIDAE

Lumbrlnerls erecta 2

PARAONIDAE

Arlcldea fragllls 1

SPIONIDAE

Apoprlonospio pygmaea 1

Polydora soclalis 3

Prlonospio h. texana 2

Scolelepis squamata 239

Streblospio benedlctl 2

MAGELONIDAE

Maqelona pettlboneae 1

CHAETOPTERIDAE

Chaetopterus variopedatus 1

Splochaetopterus c. oculatus 1

CAPITELLIDAE

Capltella capltata 7

Heteromastus flllformls 1

Notomastus laterlceus 1

1157

STATION 15-11

Sediment Type: Sand Date: Oct. 2

Weight percentages — Granules: 4.0 Sands: 93.5
Silts: 2.1 Clay: 0.4

Family and Species Dredge Shovel Net

PHYLLODOCIDAE

Eumida sanguinea 1

Phvllodoce fragills 1

HESIONIDAE

Podarke obscura 1 2

SYLLIDAE

Syllls annularis 1

NEREIDAE

Ceratonereis irrltabilis 1

Nereis arenaceodentata 15 5

Nereis p_. occidentalls 6

Nereis succinea 9

NEPHTYIDAE

Aglaophantus verrilli 3

GONIADIDAE

Glycinde paclfica 12 3

ONUPHIDAE

Diopatra cuprea 4 6

Onuphls nebulosa 2 1

ORBINIIDAE

Scoloplos robustUB 7

Scoloplos rubra 4

PARAONIDAE

Aricldea fragills 1

1158
STATION 15-11 — (Continued)

Family and Species Dredge Shovel Net

SPIONIDAE

Apoprionospio pygrnaea 13 1

Paraprionospio pinnata 291 1

Polydora socialis 12 14

Polvdora websteri 1

Prionospio cirrobranchiata 1

Scolelepis squama ta 9

Streblospio benedicti 59 12

Pseudopolydora sp. 7

CHAETOPTERIDAE

Chaetopterus variopedatus 2 1

Spiochaetopterus c. oculatus 22 1

CIRRATULIDAE

Cirratulus grandis 4 1

Cirriformia fillgera 1

Tharyx sp. C 9

CAPITELLIDAE

Capitella capitata 1

Capitellides jonesi 6 22

MALDANIDAE

Branchioasychis americana 2
Clymenella mucosa 1

SABELLARIIDAE

Sabellaria floridensis 1

Sabellaria gracilis 1

TEREBELLIDAE

Polycirrus eximius 1

SABELLIDAE

Branchlomma nlgromaculata 1 10

Megalomma bioculatum 17 10

STATION 15-12

1159

Sediment Type: Silty Sand
Weight percentages — Granules:
Silts :

Date: Oct. 2

0.3

Sands: 72.5

22.1

Clay: 5.2

Family and Species

Dredge Shovel Net

SIGALIONIDAE

Sthenelals boa

PHYLLODOCIDAE

Eumida sanquinea
Paranaites speclosa
Phyllodoce arenae

HESIONIDAE

Gyptis vlttata
Podarke obscura

SYLLIDAE

Autolytus cornutus
Brania clavata

NEREIDAE

Nereis arenaceodentata
Nereis p_. occidentalis
Nereis succinea

12

1

13

1

1

GONIADIDAE

Glycinde paclflca

17

ONUPHIDAE

Onuphis nebulosa

22

ARABELLIDAE

Arabella tricolor

DORVILLEIDAE

Dorvillea rudolphl

ORBINIIDAE

Scoloplos robustus
Scoloplos rubra

20

5

1160
STATION 15-12 — (continued)

Family and Species Dredge Shovel Net

PARAONIDAE

Aricidea fragilis 3

Clrrophorus furcatua 1

SPIONIDAE

Apoprionospio pygmaea 5

Paraprionospio pinnata 96 1

Polydora socialls 14

Prionospio cirrobranchiata 1

Prionospio h. texana 1

SPIONIDAE

Scolelepis squamata 2

Streblospio benedicti 55

CHAETOPTERIDAE

Chaetopterus variopedatus 1 i

Spiochaetopte rus c. oculatus 6 1

CIRBATULIDAE

Cirratulus qrandls 16

Cirriformia fillgera 1

Tharyx sp. C 76

CAPITELLIDAE

Heteromastus fillformis 1

Notomastus latericeus 6

MALDANIDAE

Clymenella mucosa 4 t

Maldane sarsi 3

PECTINARIIDAE

Cistenides gouldll 2

SABELLIDAE

Branchlomma nigromaculata i !

Megalomma bloculatum 9

1161

STATION 15-13

Sediment Type: Sand
Weight percentages — Granules < 3.4
Silts: 5.0

Date: Oct. 2
Sands: 91.0
Clay: 0.7

Family and Species

Dredge Shovel Net

POLYNOIDAE

Polynoid B

SIGALIONIDAE

Sthenelals boa

AMPHINOMIDAE

Pseudeurythoe arobigua

PHYLLODOCIDAE

Eumlda sari guinea
Phyllodoce arenae

SYLLIDAE

Exogone dispar

NEREIDAE

Nereis arenaceodentata

NEPHTYIDAE

Aglaophamus verrilli

GONIADIDAE

Glycinde pacifica

ONUPHIDAE

Dlopatra cuprea

ORBINIIDAE

Scoloplos robustus
Scoloplos rubra

PARAONIDAE

Arlcidea fragills

2

10

2
10

15
9

1162
STATION 15-13 — (Continued)

Family and Species Dredge Shovel Net

SPIONIDAE

Apoprionospio pyqmaea

14

Paraprionospio pinnata

221

Polydora socialls

18

Streblospio benedicti

51

POECILOCHAETIDAE

Poecllochaetus iohnsoni

1

CHAETOPTERIDAE

Chaetopterus variopedatus

4

Spiochaetopterus c. oculatus

1

CIRRATULIDAE

Cirratulus qrandis

7

Cirriformia filiqera

Tharyx sp. C

285

MALDANIDAE

Clymenella mucosa

1

SABELLIDAE

Meqalomma bioculatum

4

1
1

2

STATION 15-14

1163

Sediment Type: Sand
Weight percentages — Granules: 5.9
Silts: 6.2

Date: Oct. 2
Sands: 86.5
Clay: 1.4

Family and Species

Dredge Shovel Net

POLYNOIDAE

Harmothoe lunulata
Polynoid B

1
4

SIGALIONIDAE

Sthenelais boa

CHRYSOPETALIDAE

Paleanotus heteroseta

PHYLLODOCIDAE

Eumlda sanguinea
Phyllodoce arenae

4
2

HESIONIDAE

Podarke obscura

PILARGIDAE

Sigambra tentaculata

SYLLIDAE

Autolytus cornutus
Exogone dispar

NEREIDAE

Nereis arenaceodentata
Nereis p_. occidentalls
Nereis succinea
Platynereis dumerilli

NEPHTYIDAE

Aglaophamus verrilll

GLYCERIDAE

Glycera amerlcana

STATION 15-14 -- (Continued)

1164

Family and Species

Dredge Shovel Net

GONIADIDAE

Glycinde paclfica 12

ONUPHIDAE

Dlopatra cuprea 1

Onuphls nebulosa

LUMBRINERIDAE

Lumbrineris erecta 2

ORBINIIDAE

Scoloplos rubra 1

PARAONIDAE

Aricldea fragllls 2

SPIONIDAE

Paraprlonospio pinnata 49

Polydora soclalis

Polydora websteri 2

CHAETOPTERIDAE

Chaetopterus variopedatus 14
Splochaetopterus c. oculatus 1

CIRRATULIDAE

Cirratulus qrandis 5

Tharvx sp. C 13

FLABELLIGERIDAE

Pherusa arenosa 1

CAPITELL1DAE

Heteromastus fillformls 3

MAUDANIDAE

Branchioasychis americana 6

PECTINARIIDAE

Clstenides gouldil 2

12

7

1165
STATION 15-14 ~ (Continued)

Family and Species Dredge Shovel Net

AMPHARETIDAE

Isolda pulchella 4

SABELLIDAE

Branchiomma nlgromaculata 2

Fabrlcia sabella 6

STATION 15-15

1166

Sediment Type: Sand

Weight percentages — Granules: 0.1
Silts: 6.6

Date: Oct. 14
Sands: 90.7
Clay: 2.5

Family and Species

Dredge Shovel Net

SIGALIONIDAE

Sthenelais boa

SYLLIDAE

Exogone dlspar
Syllls varlegata
Syllls sp. B

NEREIDAE

Nereis arenaceodentata

209

GONIADIDAE

Glvcinde paciflca

ONUPHIDAE

Diopatra cuprea
Onuphis sp.

4
25

LUMBRINERIDAE

Lumbrinerls erecta

ORBINIIDAE

Scoloplos robustus

PARAONIDAE

Aricidea taylori

SPIONIDAE

Paraprlonospio pinnata
Polvdora socialis
Polydora websterl
Prlonospio h. texana
Streblosplo benedictl

7
1
3
13
4

MAGELONIDAE

Maqelona pettlboneae

1167
STATION 15-15 — (Continued)

Family and Species Dredge Shovel Net

CHAETOPTERIDAE

Spiochaetopterus c. oculatus 1 1

CIRRATULIDAE

Cirratulus qrandla 134

Tharyx sp. C 1

CAPITELLIDAE

Capitellldes ionesi 3

MALDANIDAE

Branchloasychis aniericana 1
Clymenella mucosa 5

TEREBELLIDAE

Thelepus setosus 9 1

SABELLIDAE

Branchiomma nlgromaculata 10

STATION 15-16

1168

Sediment Type: Sand

Weight percentages — Granules: 0.6
Silts i 4.1

Date: Oct. 14
Sands: 94.4
Clay: 0.8

Family and Species

Dredge Shovel Net

SYLLIDAE

Syllis annularis

NEREIDAE

Nereis arenaceodentata
Platynerels dumerilil

GONIADIDAE

Glycinde paciflca

ONUPHIDAE

Diopatra cuprea
Onuphis magna
Onuphis sp.

ARABELLIDAE

Arabella iricolor

ORBINIIDAE

Scoloplos robustus

PARAONIDAE

Aricldea fragilis

4

2

25

SPIONIDAE

Polydora socialls
Prionosplo h. texana

MAGELONIDAE

Magelona pettiboneae

CHAETOPTERIDAE

Splochaetopterus c. oculatus

5
'21

1169

STATION 15-16 — (Continued)

Family and Species Dredge Shovel Net

CIRRATULIDAE

Cirratulus grand! s 61

Tharyx sp. C 1

CAPITELLIDAE

Heteromastus fillformls 1

MALDANIDAE

Clymenella mucosa 21

OWENI1DAE

Owenla fusiformis 3

PECTINARIIDAE

Cistenldes gouldii 1

AMPHARETIDAE

Isolda pulchella 1

TEREBELLIDAE

Thelepus setosus 3

SABELLIDAE

Branchiomma nigromaculata 63 10

Sabella mlcrophthalma 1

1170

STATION 15-17

Sediment Type: Sand
Weight percentages — Granules: 0,
Silts: 0,

.1
.5

Date: i
Sands :
Clay:

3ct. 14

99.2

0.2

Family and Species

Dredge

Shovel

Net

PHYLLODOCIDAE

Phyllodoce arenae

1

NEREIDAE

Nereis arenaceodentata

10

Nereis p. occidentalis

1

GONIADIDAE

Glycinde pacifica

21

ONUPHIDAE

Diopatra cuprea
Onuphis sp.

13

1

1

ORBINIIDAE

Scoloplos robustus
Scoloplos rubra

4

1

PARAONIDAE

Cirrophorus furcatus

1

SPIONIDAE

Apoprionospio pyqmaea
Paraprionospio plnnata
Prionospio clrrobranchlata

8
76
i
6
2
2

i

Prionospio h. teana
Streblospio bfinorilr-H
Pseudopolydora sp„

CHAETOPTERIDAE

Spiochaetopterus c. oculatus

11

1

CIRRATULIDAE

Cirratulus qrandis
Tharvx sp. c

1
1

1171

STATION 15-17 — (Continued)

Family and Species Dredge Shovel Net
OPHELIIDAE

Travisla sp. 1

MALDANIDAE

Clymenella mucosa 2

SABELLIDAE

Branchlomma nigromaculata 1

1172

STATION 15-18

Sediment Type: Sand
Weight percentages —

Granules t

Silts:

1.3
0.4

Date: Oct. 14
Sands : 98 . 3
Clay: 0.1

Family and Species

PHYLLODOCIDAE

Phyllodoce arenae

HESIONIDAE

Gyptis vlttata
Podarke obscura

SYLLIDAE

Exogone dispar

NEREIDAE

Nereis arenaceodentata
Nereis p_. occidentalls
Platynereis dumerilli

GONIADIDAE

Glyclnde pacifica

ONOPHIDAE

Onuphis nebulosa

ORBINIIDAE

Orbinla ornata
Scoloplos robustus

PARAONIDAE

Arlcidea fragilis

SPIONIDAE

Apoprionosplo pygmaea
Paraprionospio pinnata
Polydora socialis
Prlonosplo h. texana
Scolelepls sguamata
Splo setosa

Dredge Shovel Net

7 2

1

1

2

39 1

1
1

10

20

1
5

3
39

1
18

1
53

117 3

STATION 15-18 — (Continued)

Family and Species

Dredge Shovel Net

CHAETOPTERIDAE

Chaetopterus variopedatus
Spiochaetopteru8 c. oculatus

CIRRATULIDAE

Tharyx sp. C

OPHELIIDAE

Travlsia sp.

CAPITELLIDAE

Capitella capltata

MALDANIDAE

Clymenella mucosa

AMPHARETIDAE

Isolda pulchella

TEREBELLIDAE

Polycirrus eximius

SABELLIDAE

Branchlomma nigromaculata

1

349

2

36

10

1174

Sediment Type : -
Weight percentages

STATION 15-19

Granules :
Silts:

Date: Oct. 17

Sands:

Clay:

Family and Species

PHYLLODOCIDAE

Phyllodoce arenae

NEREIDAE

Nereis arenaceodentata

GONIADIDAE

Glyclnde paclfica

ONUPHIDAE

Diopatra cuprea
Onuphis nebulosa

SPIONIDAE

Apoprionospin pyqmaea
Scolelepis squamata

CHAETOPTERIDAE

Spiochaetopterus c. oculatus

OPHELIIDAE

Travisia sp.

MALDANIDAE

Clymenella mucosa

PECTINARIIDAE

Clstenidea qouldii

Dredge Shovel Net

70

13

10

10

1175
STATION 15-20

Sediment Type: - Date: Oct. 17

Weight percentages — Granules: - Sands:

Silts: - Clay:

Family and Species Dredge Shovel Net

PHYLLODOCIDAE

Phyllodoce arenae 4

NEREIDAE

Nereis arenaceodentata 1

Nereis p_. occldentalls 26

Platynerels dumerllll 1

GONIADIDAE

Glycinde paciflca 3

ONUPHIDAE

Dlopatra cuprea 12

Onuphis magna 1

Onuphis nebulosa 9

SPIONIDAE

Apoprionosplo pyemia ea 4

Polydora socialis 7

Scolelepis squamata 4

Spio setosa 1

CHAETOPTERIDAE

Splochaetopterus c. oculatus 1

OPHELIIDAE

Travlsla sp. 5

CAPITELLIDAE

Capitellides jonesl 1

MALDANIDAE

Clymenella mucosa 9

OWENIIDAE

Owenia fuslformls 2

STATION 15-21

1176

Sediment Type: Sand

Weight percentages — Granules: 2.7
Silts: 0.2

Date: Oct. 17
Sands: 97.0
Clay: 0.1

Family and Species

Dredge Shovel Net

SIGALIONIDAE

Slgallon arenlcola

PHVLLODOCIDAE

Phyllodoce arenae

SYLLIDAE

Syllls sp. B

NEREIDAE

Nereis arenaceodentata
Nereis p_. occldentalis
Nereis succinea

GLYCERIDAK

Glvcera dibranchlata

25

1
5
4

GONIADIDAE

Glycinde pacifica
Goniadella sp.

ONUPHIDAE

Onuphis magna
Onuphis nebulosa

SPIONIDAE

Polydora socialls
Spio setosa

CHAETOPTERIDAE

Chaetopterus variopodatus
Mesochaetopterus sp. B

OPHELIIDAE

Travisia sp.

9
4

1
55

1
1

42

1177

STATION 15-21 — (Continued)

Family and Species Dredge Shovel Net

CAPITELLIDAE

Capltellides lonesl 1

Heteroma8tus flllformls 12

MALDANIDAE

Clymenella mucosa 47

OWENIIDAE

Owenia fuslformls 5

TEREBELLIDAE

Polvclrrus eximius 11

STATION 15-22

1178

Sediment Type: Sand

Weight percentages — Granules: 5.3
Silts « 1.2

Date: Oct. 21
Sands: 93.2
Clay: 0.3

Family and Species

Dredge Shovel Net

POLYNOIDAE

Harmothoe lunulata

SIGALIONIDAE

Slgallon arenlcola

2
8

CHRYSOPETALIDAE

Paleanotus heteroseta

PHYLLODOCIDAE

Phyllodoce arenae

16

SYLLIDAE

Exogone dlspar
Syllls sp. A

60
30

NEREIDAE

Nereis Bucclnea

NEPHTYIDAE

Aglaophamus verrllll

GONIADIDAE

Gonladella sp.

1?

ONUPHIDAE

Onuphls nebulosa

32

LUMBRINERIDAE

Lumbrlneris erecta
Lumbrinerls latreilli

ARABELLIDAE

Arabella tricolor
Drllonerels cvlindrlca

3
2

1179

STATION 15-22 — (Continued)

Family and Species

Dredge Shovel Net

ORBINIIDAE

Scoloplos rubra

PARAONIDAE

Clrrophorus furcatus

CHAETOPTERIDAE

Spiochaetopterus c. oculatus

OPHELIIDAE

Armandia agllls
Travlsla sp.

CAPITELLIDAE

Heteromastus filiformis

MALOANIDAE

Clvmenella mucosa

OWENIIDAE

Owen la fuslformis

SABELLARIIDAE

Sabellarla gracilis

AMPHARETIDAE

iBolda pulchella

1180

Sediment Type: Sand
Weight percentages —

STATION 15-2

13

Date: Oct. 21

Granules:

7.7

Sands: 91.9

Silts:

0.3

Clay: 0.1

Family and Species

Dredge Shovel Net

SIGALIONIDAE

Slqallon arenlcola

CHRYSOPETALIDAE

Paleanotus heteroseta

33

PHYLLODOCIDAE

Phyllodoce arenae
Phyllodoce fragilis

SYLLIDAE

Exogone dlspar
Syllis aclculata
Syllis sp. A

NEREIDAE

Nereis succlnea

GONIADIDAE

Goniadella sp.

ONUPHIDAE

Onuphls magna
Onuphis nebulosa

EUNICIDAE

Nematonerels hebes

126
2

76

1
39

ORBINIXDAE

Scoloplos rubra

SPIONIDAE

Polydora socialls
Prionosplo h. texana

MAGELONIDAE

Magelona pettlboneae

18

1181
STATION 15-23 — (Continued)

Family and Species Dredge Shovel Net

CHAETOPTERIDAE

Chaetopterus variopedatus 1
Splochaetopterus c. oculatus 2

OPHELIIDAE

Armandla agilis 1

Travisia sp. 2

MALDANIDAE

Clymenella mucosa 1

OWENIIDAE

Owenla fuslformls 1

SABELLIDAE

Fabricia sabella 2

1182

STATION 15-24

Sediment Type: - Date: Oct. 21

Weight percentages — Granules: - Sands:

Silts: - Clay:

Family and Species Dredge Shovel Net

CHRYSOPETALIDAE

Paleanotus heteroseta 8

PHYLLODOCIDAE

Eumida sanquinea 1

SYLLIDAE

Exogone dispar 39

Syllls sp. A 14

GONIADIDAE

Goniadella sp. 7

ONUPHIDAE

Onuphis nebulosa 61

SPIONIDAE

Polydora socialis 5

Prionosplo h. texana 4

CHAETOPTERIDAE

Spiochaetopterus c. oculatus 1

CAPITELLIDAE

Heteromastus flliformis 3

OWENIIDAE

Myrlochele sp. 2

TEREBELLIDAE

Polvcirrus exlmius 2

1183

STATION 15-25

Sediment Type: Sand
Weight percentages ~ Granules: 6.0
Silts: 0.3

Date: Oct. 21
Sands: 93.5
Clay: 0.2

Family and Species

Dredge Shovel Net

POLYNOIDAE

Lepidonotus variabilis

SIGALIONIDAE

Sigalion arenicola

CHRYSOPETALIDAE

Paleanotus heteroseta

PHYLLODOCIDAE

Phyllodoce arenae
Phyllodoce fragilis

PILARGIDAE

Cabira lncerta

SYLLIDAE

Exogone dispar
Syllis sp. A

NEREIDAE

Nereis succinea

GONIADIDAE

Gonladella sp.

ONUPHIDAE

OnuphiB nebulosa

EUNICIDAE

Marphvsa sanguinea
Nematonereis hebes

LUMBRINERIDAE

Lumbrlneris coccinea

20
51
13

22
32

59

I

1
13

1184

STATION 15-25 — (Continued)

Family and Species

Dredge Shovel Net

ARABELLIDAE

Drilonereis cvlindrica
Drilonerels magna

ORBINIIDAE

Scoloplos rubra

17

SPIONIDAE

Polydora socialis

OPHELIIDAE

Ainmotrypane aulogaster
Travlsla sp.

1185

STATION 15-26

Sediment Type: Sand
Weight percentages — Granules: 6.6
Silts: 1.0

Date: Oct. 21
Sands: 92.0
Clay: 0.4

Family and Species

Dredge Shovel Net

POLYNOIDAE

Harmothoe lunulata

SIGALIONIDAE

Slgalion arenicola

CHRYSOPETALIDAE

Paleanotus heteroseta

45

PHYLLODOCIDAE

Phyllodoce arenae

SYLLIDAE

Exogone dispar
Syllis sp. A

42
6

NEREIDAE

Nereis succinea

GLYCERIDAE

Glycera americana

GONIAL) IDAE

Goniadella sp.

33

ONUPHIDAE

Onuphis magna
Onuphis nebulosa

1

40

EUNICIDAE

Marphysa sanguinea

LUMBRINERIDAE

Lumbrlneris latrellll

STATION 15-26 — (Continued)

1186

Family and Species

Dredge Shovel Net

ORBINIIDAE

Scoloplos rubra 9

SPIONIDAE

Polvdora socialls 9

Scolelepls squamata 1

CHAETOPTERIDAE

Chaetopterus variopedatus
Splochaetopterus c. oculatus

CIRRATULIDAE

Cirratulus sp. D 1

Cirriformia sp. B 1

OPHELIIDAE

Travisia sp. 10

MALDANIDAE

Clymenella mucosa 9

OWENIIDAE

Owenia fusiformis 1

Myriochele sp. 1

SABELLARIIDAE

Sabellaria gracilis 1

AMPHARETIDAE

Isolda pulchella 1

1187

STATION 15-27

Date: Oct. 21

' Granules t 1.3

Sands: 98.5

Silts: 0.2

Clay: 0.1

Family and Species

Dredge Shovel Net

SIGALIONIDAE

Slgallon arenlcola

CHRYSOPETALIDAE

Paleanotus heteroseta

PHYLLODOCIDAE

Phyllodoce arenae

SYLLIDAE

Syllis sp. A
Syllis sp. B

NEREIDAE

Nereis succinea

1
44

GONIADIDAE

Goniadella sp.

ONUPHIDAE

Onuphis nebulosa

ORBINIIDAE

Scoloplos rubra

SPIONIDAE

Polydora websteri

CHAETOPTERIDAE

Chaetopterus varlopedatus

OPHELIIDAE

Armandia agllls
Travisia sp.

CAPITELLIDAE

Heteromastus flliformis

4
17

1

2
20

1188

STATION 15-27 — (Continued)

Family and Species

Dredge Shovel Net

MALDANIDAE

Clvmenella mucosa

26

10

OWENIIDAE

Owenia fuslformls

TEREBELLIDAE

Lolmia medusa

STATION 15-28

1189

Sediment Type: Sand

Weight percentages — Granules: 2.8
Silts: 0.4

Date: Oct. 21
Sands: 96.6
Clay: 0.2

Family and Species

Dredge Shovel Net

SIGALIONIDAE

Sigalion arenicola

23

CHRYSOPETALIDAE

Paleanotus heteroseta

5

PHYLLODOCIDAE

Phyllodoce arenae

2

SYLLIDAE

Branchiosvllis oculata

1

Brania clavata

1

Exoqone dispar

1

Syllis sp. B

18

NEREIDAE

Nereis p. occidentalis

1

GLYCERIDAE

Glycera americana

1

ONUPHIDAE

Onuphis nebulosa

64

SPIONIDAE

Spio setosa

1

OPHELIIDAE

Travisia sp.

34

CAPITELLIDAE

Heteromastus filiformis

1

MALBANIDAE

Clymenella mucosa

19

TEREBELLIDAE

Polvcirrus eximius

4

1190

STATION 15-29

Sediment Type: - Date: Oct. 22

Weight percentages — Granules: - Sands:

Silts: - Clay:

Family and Species Dredge Shovel Net

PHYLLODOCIDAE

Eumida sanquinea

Phyllodoce arenae

5

HESIONIDAE

Podarke obscura

1

SYLLIDAE

Exoqone dispar
Syllis varieqata

7
5

NEREIDAE

Platynereis dumerilii

GONIADIDAE

Goniadella sp.

2

ONUPHIDAE

Onuphis maqna
Onuphis nebulosa

1
54

SPIONIDAE

Paraprionospio pinnata
Polydora socialis
Prionospio h. texana
Spio setosa

1
19
22

1

POECILOCHAETIDAE

Poecilochaetus lohnsoni

1

CIRRATULIDAE

Cirratulus sp. A

4

OPHELIIDAE

Armandia aqilis
Travisia sp.

2
12

1191
STATION 15-29 ~ (Continued)

Family and Species Dredge Shovel Net

CAPITELLIDAE

Heteromastus fillformls 19

MALDANIDAE

Clynienella mucosa 84

OWENIIDAE

Owenla fuslformls 2

AMPHARETIDAE

Isolda pulchella 4

TEREBELLIDAE

Loimla medusa 1

Polvclrrus exlmlus 1

1192

STATION 15-30

Sediment Type: Sand Date: Oct. 22

Weight percentages — Granules: 3.5 Sands: 96.1

Silts: 0.3 Clay: 0.1

Family and Species Dredge Shovel Net

CHKYSOPETALIDAE

Paleanotus heteroseta

PHYLLODOCIDAE

Phyllodoce arenae

15

SYLLIDAE

Exoqone dispar
Syllis sp. B

15

70

NEREIDAE

Ceratonereis irritabilis

1

ONUPHIDAE

Onuphis nebulosa

65

SPIONIDAE

Polydora socialis

2

OPHELIIDAE

Armandia aqilis
Travisia sp.

1
90

CAPITELLIDAE

Heteromastus filiformis

10

MALDANIDAE

Clymenella mucosa

116

OWENIIDAE

Owenia fusiformis

3

AMPHARETIDAE

Isolda pulchella

12

1193

STATION 15-30 — (Continued)

Family and Species Dredge Shovel Net

TEREBELLIDAE

Loiroia medusa 3

Polycirrus eximlus 1

SABELLIDAE

Branchiomma nlgromaculata

STATION 15-31

1194

Sediment Type: Sand

Weight percentages — Granules: 4.5
Silts: 1.9

Date: Oct. 22
Sands: 93.3
Clay: 0.4

Family and Species

Dredge Shovel Net

POLYNOIDAE

Harmothoe lunulata

PHYLLODOCIDAE

Phyllodoce arenae

44

HESIONIDAE

Gyptls vittata
Podarke obscura

16

1

SYLLIDAE

Syllls aciculata

33

NEREIDAE

Nereis succlnea

GONIADIDAE

Glycinde paclf lea
Gonladella sp.

10
30

ONUPHIDAE

Dlopatra cuprea
Onuphis nebulosa

3
250

EUNICIDAE

Marphysa sangulnea

ORBINIIDAE

Scoloplos rubra

SPIONIDAE

Polydora soclalls
Prionosplo h. texana
Splo setosa

21

1

CHAETOPTERIDAE

Spiochaetopterus c. oculatus

1195

STATION 15-31

(Continued)

Family and Species

Dredge Shovel Net

CIRRATULIDAE

Cirratulus qrandis
Cirratulus sp. A
Tharyx sp. B

2
2

1

OPHELIIDAE

Armandia aqilis
Travis la sp.

2

69

CAPITELLIDAE

Heteromastus fillformis

67

ARENICOLIDAE

Arenicola cristata

1

MALDANIDAE

Branchioasychls americana
Clymenella mucosa

1
35

OWENIIDAE

Owenia fusiformis

18

SABELLARIIDAE

Sabellaria qracilis

5

PECTINARIIDAE

Citenides qouldil

3

AMPHARETIDAE

Isolda pulchella

122

TEREBELLIDAE

Enoplobranchus sanquineus
Loimia medusa

1
1

SABELLIDAE

Branchiomma niqromaculata
Fabricia sabella
Sabella microphthalma

1
34

1

1196

STATION 15-32

Sediment Type: Sand Date: Oct. 22

Weight percentages — Granules: 0.7 Sands: 98.4

Silts: 0.7 Clay: 0.2

Family and Species Dredge Shovel Net

CHRYSOPETALIDAE

Paleanotus heteroseta

PHYLLODOCIDAE

Phyllodoce arenae

14

HESIONIDAE

Podarke obscura

1

SYLLIDAE

Exogone dispar
Syllis SP. B

8
4

NEREIDAE

Nereis p. occidentalis

4

GONIADIDAE

Glvcinde pacifica

3

ONOPHIDAK

Diopatra cuprea
Onuphis nebulosa

1
47

ORBINIIDAE

Scoloplos robustus
Scoloplos rubra

10
5

SPIONIDAE

Paraprionospio pinnata
Polydora socialis

2
1

CHAETOPTERIDAE

Spiochaetopterus c. oculatus

1

1197
STATION 15-32 — (Continued)

Family and Species Dredge Shovel Net

CIRRATULIDAE

Cirratulus grandis 1

Cirrlformla flllgera 1

OPHELIIDAE

Travlsla sp. 15

CAPITELLIDAE

Heteromastus filiformls 1

Notomastus latericeus 1

MALDANIDAE

Clymenella mucosa 73

OWENIIDAE

Owen la fuslformis 5

AMPHARETIDAE

Isolda pulchella 5

SABELLIDAE

Branchiomma nigromaculata 1

1198

STATION 15-33

Sediment Type: Sand

Weight percentages — Granules] 2.4
Silts i 0.0

Date: Oct. 22
Sands: 97.6
Clay i 0.0

Family and Species

Dredge Shovel Net

PHYLLODOCIDAE

Phyllodoce arenae

PILARGIDAE

Siqambra bassl

SYLLIDAE

Syllls sp. B

NEREIDAE

Nereis arenaceodentata

32

ONUPHIDAE

Onuphis magna
Onuphis nebulosa

ORBINIIDAE

Scoloplos robustus
Scoloplos rubra

PARAONIDAE

Arlcldea fragllis

OPHELIIDAE

Travlsia sp.

MALDANIDAE

Clymenella mucosa

TEREBELLIDAE

Polycirrus exiroius

SABELLIDAE

Fabrlcia sabella

5

111

43

1199

STATION 16-1

Date: Oct. 14

' Granules: 1.3

Sands: 90.2

Silts: 6.9

Clay: 1.7

Family and Species Dredge Shovel Net

SIGALIONIDAE

Sthenelais boa 1

PHYLLODOCIDAE

Phyllodoce arenae 1

HESIONIDAE

Gyptis vlttata 1

SYLLIDAE

Exogone dlspar 2

Syllls aciculata 2

Syllis annularis 1

Syllis sp. B 4

NEREIDAE

Nereis arenaceodentata 9

Nereis £. occidentalis 28 1

Nereis succinea 1

Platynereis dumerilil 12

ONUPHIDAE

Diopatra cuprea 3

Onuphls nebulosa 1

Onuphis sp. 17 1

DORVILLEIDAE

Dorvillea rudolphi 1

ORBINIIDAE

Scoloplos robustus 8

PARAONIDAE

Arlcidea fragills 30

Arlcldea sp. 6

1200
STATION 16-1 ~ (Continued)

Family and Species Dredge Shovel Net

SPIONIDAE

Apoprionosplo pyqroaea 1

Paraprionosplo pinnata 1

Polydora socialis 17

Prionosplo h. texana „ 45

Splophanes bombyx 4

Streblospio benedlctl 2

MAGELONIDAE

Magelona pettlboneae 6

CHAETOPTERIDAE

Chaetopterus variopedatus 1

Spiochaetopterus c. oculatus 2

CIRRATULIDAE

Clrratulus grandls 64

Tharvx sp. C 17

OPHELIIDAE

Travisia sp. 1

CAPITELLIDAE

Capltella capitata 1

Capitellides jonesi 1

Heteromastus filiformls 22

MALDANIDAE

Branchioasychis americana 1

Clymenella mucosa 4 i

TEREBELLIDAE

Lolmla medusa 1

Pista palmata 1

Thelepus setosus 2

SABELLIDAE

Branchiomma nlgromaculata 524 10

1201

Sediment Type: Sand
Weight percentages —

STATION 16-2

Date: Oct. 15

Granules s 1.2

Sands: 88.9

Silts: 8.0

Clay: 1.9

Family and Species

Dredge Shovel Net

POLYNOIDAE

Lepidonotus variabilis

PHYLLODOCIDAE

Euroida sangulnea

HESIONIDAE

Gyptis vittata

SYLLIDAE

Syllis annularis
Syllis sp. B

NEREIDAE

Nereis p.. occidentalls
Platynerels dumerllll

ONUPHIDAE

Dlopatra cuprea
Onuphis sp.

EUNICIDAE

Marphvsa sangulnea

DORVILLEIDAE

Dorvlllea rudolphl

ORBINIIDAE

Nainerls setosa

1
13

30

6
10

10

PARAONIDAE

Arlcidea fragllls
Aricldea sp.

1202
STATION 16-2 ~ (Continued)

Family and Species Dredge Shovel Net

SPIONIDAE

Polydora socialls 22 6
Polydora websteri 1

Prionospio h. texana 15
Streblospio benedictl 1

MAGELONIDAE

Magelona pettiboneae 3

CIRRATULIDAE

Cirratulus grand is 2

Cirriformia sp. A 2

Tharyx sp. C 43

CAPITELLIDAE

Capitellides ionesi 1

Heteromastus flliformis 5

MALDANIDAE

Clymenella mucosa 25

SABELLARIIDAE

Sabellarla gracilis 2

TEREBELLIDAE

Thelepus setosus 108 5

SABELLIDAE

Branchiomma nlgromaculata 690 10

Sabella microphthalmia 4

1203

STATION 16-3

Sediment Type: Sand Date: Oct. 15

Weight percentages — Granules: 1.2 Sands: 93.3

Silts: 5.5 Clay: 0.5

Family and Species Dredge Shovel Net

HESIONIDAE

Gyptis vlttata 1

PILARGIDAE

Sigambra bassl 1

SYLLIDAE

Svllls aciculata 23

NEREIDAE

Nereis arenaceodentata 39

ONUPHIDAE

Diopatra cuprea 1

EUNICIDAE

Marphysa sangulnea 5 6

LUMBRINERIDAE

Lumbrlnerls erecta 2

ORBINIIDAE

Scoloplos robustus 1

Scoloplos rubra 1

PARAONIDAE

Aricidea fragilis 14

Aricidea sp. 6

SPIONIDAE

Prionospio h. texana 78

MAGELONIDAE

Magelona pettiboneae 8

1204

STATION 16-3 — (Continued)

Family and Species Dredge Shovel Net

CIRRATULIDAE

Cirratulus qrandis 110

CAPITELLIDAE

Capitella capitata 35

Heteromastus filiformis 8

MALDANIDAE

Clymenella mucosa 80

TEREBELLIDAE

Thelepus setosus 2

SABELLIDAE

Branchiomma nlgromaculata 2

Fabricia sabella 1

1205

STATION 16-4

Sediment Type: Sand

Weight percentages — Granules! 13.4
Silts: 5.3

Date: Oct. 15
Sands: 80.5
Clay: 0.8

Family and Species

Dredge Shovel Net

AMPHINOMIDAE

Ps eudeu ry thoe arobigua

PHYLLODOCIDAE

Eteone heteropoda

HESIONIDAE

Gvptis vlttata
Podarke obscura
Gyptis sp.

PILARGIDAE

Pilargls pacifica

SYLLIDAE

Branchiosyllis oculata
Brania clavata
Exogone dispar
Syllis annularis
Syllis sp. A

NEREIDAE

Nereis arenaceodentata
Platynereis dumerilii

ONUPHIDAE

Diopatra cuprea
Onuphis sp.

ARABELLIDAE

Drilonereis cylindrica

ORBINIIDAE

Scoloplos robustns
Scoloplos rubra

24

1
1

30
115

1
6

STATION 16-4 -- (Continued)

1206

Family and Species

PARAONIDAE

Arlcidea fragllls
Aricidea sp.

SPIONIDAE

Polydora soclalis
Polydora websterl
Prlonosplo h. texana

MAGELONIDAE

Magelona pettiboneae

CIRSATULIDAE

Clrratulus grandls
Tharyx sp. C

CAPITELLIDAE

Capitella capitata
Heteromastus flllformis

ARENICOLIDAE

Arenicola cristata

Dredge Shovel Net

7
56

1
62

16

127

1

125

1

MALDANIDAE

Clymenella mucosa

SABELLIDAE

Branchlomma nigromaculata
Fabricia sabella

124

1
6

STATION 16-5

1207

Sediment Type: Sand

Weight percentages — Granules « 2.9
Silts i 7.2

Date: Oct. 15
Sands: 88.0
Clay: 1.9

Family and Species

Dredge Shovel Net

SIGALIONIDAE

Slgalion arenlcola

AMPHINOMIDAE

Pseudeurythoe amblqua

HESIONIDAE

Gyptls vittata
Podarke obscura

SYLLIDAE

Syllis aciculata
Syllis sp. A

11

4

NEREIDAE

Nereis arenaceodentata
Nereis p_. occidentalls
Platynereis dumerilll

78

1

ONUPHIDAE

Diopatra cuprea

EUNICIDAE

Marphysa sanquinea

ORBINIIDAE

Scoloplos rubra

PARAONIDAE

Arlcldea fragllls
Aricidea sp.

5
13

SPIONIDAE

Paraprlonospio pinnata
Polydora soclalls
Polydora websterl

4
11
18

STATION 16-5 -- (Continued)

1208

Family and Specie3

Dredge Shovel Net

Prionospio h. texana
Streblospio benedictl
Pseudopolydora sp.

MAGELONIDAE

Magelona pettiboneae

CIRRATULIDAE

Clrratulus qrandis
Tharyx sp. C

CAPITELLIDAE

Capltella capltata
Heteromastus flllformiB

164
6

4

98
5

ARENICOLIDAE

Arenicola cristata

MALDANIDAE

Clyroenella mucosa

TEREBELLIDAE

Polyclrrus exlmius

SABELLIDAE

Branchiomma nlgromaculata
Fabricia sabella

1
5

STATION 16-6

1209

Sediment Type: Sand
Weight percentages — Granules: 1.3
Silts: 2.1

Date: Oct. 15
Sands: 96.2
Clay: 0.5

Family and Species

SIGALIONIDAE

Sthenelais boa

Dredge Shovel Net

PHYLLODOCIDAE

Eteone heteropoda
Paranaites speciosa
Phvllodoce arenae
Phyllodoce fragills

4

5

19

2

HESIONIDAE

Podarke obscura

PILARGIDAE

Sigambra tentaculata

SYLLIDAE

Exogone dispar
Syllis aciculata
Syllis sp. B

NEREIDAE

Nereis p_- occidentalis
Nereis succinea
Platvnerels dumerllil

NEPHTYIDAE

Aglaophamus verrilll

GLYCERIDAE

Glycera americana

204

4

2

16

2

GONIADIDAE

Glycinde pacifica

ONUPHIDAE

Onuphis magna
Onuphis nebulosa

26

1
55

1210
STATION 16-6 ~ (Continued)

Family and Species Dredge Shovel Met

LUMBRINERIDAE

Lumbrlnerls erecta 1

Lumbrinerls sp. 2

ORBINIIDAE

Scoloplos robustus 6

PARAONIDAE

Aricldea sp. 3

SPIONIDAE

Apoprionospio pygmaea 37

Paraprionospio pinna ta 28

Polydora soclalls 18 5

Prionospio clrrobranchiata 10

Prionospio h. texana 9

Scolelepis squama ta 1

Spio setosa 6

Spiophanes bombyx 6

MAGELONIDAE

Magelona pettiboneae 1

CHAETOPTERIDAE

Chaetopterus varlopedatus 1

Spiochaetopterus c. oculatus 24

CIRRATULIDAE

Cirratulus qrandis

2

Cirratulus sp. B

6

Cirratulus sp. C

1

Tharyx sp. C

3

OPHELIIDAE

Armandia aqilis

14

Travisia sp.

42

CAPITELLIDAE

"

Capitella capitata

8

Heteromastus filiformis

30

1211

STATION 16-6 — (Continued)

Family and Species Dredge Shovel Net

MALDANIDAE

Branchioasychis americana

1

Clvmenella mucosa

51

OWENIIDAE

Owenia fusiformis

15

SABELLARIIDAE

Sabellaria qracilis

1

PECTINARIIDAE

Cistenides qouldii

2

AMPHARETIDAE

Isolda pulchella

16

Melinna maculata

1

TEREBELLIDAE

Enoplobranchus sanquineus

1

Loimia medusa

1

Pista cristata

4

SABELLIDAE

Fabricia sabella

391

Meqalomraa bioculatum

1

1212

STATION 16-7

Sediment Type: Sand

Weight percentages — Granules : 0.3
Silts « 1.7

Date: Oct. 15
Sands: 97.5
Clay: 0.2

Family and Species

Dredge Shovel Net

PHYLLODOCIDAE

Phyllodoce arenae

HESIONIDAE

Podarke obscura

SYLLIDAE

Syllis aciculata
Syllis varieqata

1
2

NEREIDAE

Nereis arenaceodentata

72

GONIADIDAE

Glycinde pacifica

6

ONUPHIDAE

Diopatra cuprea
Onuphis sp.

1
49

LUMBRINERIDAE

Lumbrineris sp.

1

PARAONIDAE

Aricidea fraqilis
Aricidea sp.

1
2

SPIONIDAE

Apoprionospio pyqmaea
Paraprionospio pinnata
Polydora socialls
Polydora websteri
Prionospio h. texana
Scolelepls squamata
Spio setosa
Splophanes bombyx

14

79

9

2

34

15

3

1

1213
STATION 16-7 — (Continued)

Family and Species Dredge Shovel Net

MAGELONIDAE

Maqelona pettiboneae 1

CHAETOPTERIDAE

Spiochaetopterus c. oculatus 12

CIRRATULIDAE

Clrratulus sp. B 1

OPHELIIDAE

Armandia agills 4

CAPITELLIDAE

Capitellldes ionesl 81

Heteromastus flliformis 2

MALDANIDAE

Clvmenella mucosa 6

SABELLIDAE

Branchiomroa nigromaculata
Chone duneri 1

Mega 1 omnia bioculatum 1

Sabella microphthalma

1214

Sediment Type: Sand
Weight percentages —

STATION 16-8

Date: Oct. 15

■ Granules: 7.0

Sands: 86.3

Silts: 5.6

Clay: 1.1

Family and Species

Dredge Shovel Net

PHYLLODOCIDAE

Phvllodoce arenae
Phyllodoce fragilis

HESIONIDAE

Gyptls vlttata

SYLLIDAE

Syllis annularis
Syllis vittata
Syllis sp. A

NEREIDAE

Nereis arenaceodentata
Nereis p_. occidentalis
Nereis succlnea
Perinerels florldana
Platynerels dumerllii

ONUPHIDAE

Diopatra cuprea
Onuphis sp.

EUNICIDAE

Marphysa sangulnea

ARABELLIDAE

Drilonereis cyllndrica

ORBINIIDAE

Scoloplos robustus
Scoloplos rubra
Nalnerls sp.

1
60

3
13

23
7
4

1
35

3

2

15

1215

STATION 16-8

(Continued)

Family and Species

Dredge Shovel Net

PARAONIDAE

Aricidae fragilis
Aricidae sp.

16
2

SPIONIDAE

Paraprlonospio plnnata
Polydora socialis
Prionosplo h. texana
Streblosplo benedicti

51

1
8

MAGELONIDAE

Magelona pettlboneae

CIRRATULIDAE

Cirratulus grand is
Tharyx sp. C

32

1

CAPITELLIDAE

Capitellides ionesl
Heteromastus fillformis

25

ARENICOLIDAE

Arenlcola cristata

MALDANIDAE

Clymenella mucosa

32

TEREBELLIDAE

Thelepus setosus

SABELLIDAE

Branchiomnia nlgroniaculata

Chone duneri

Sabella microphthalma

1216

STATION 16-9

Sediment Type: Sand

Weight percentages — Granules: 1.2
Silts: 1.2

Date: Oct. 18
Sands: 97.5
Clay: 0.1

Family and Species

Dredge Shovel Net

PHYLLODOCIDAE

Phyllodoce arenae

SYLLIDAE

Syllis sp. B

NEREIDAE

Nereis arenaeodentata
Nereis p. occidentalis
Nereis succinea
Platynereis dumerilii

ONUPHIDAE

Diopatra cuprea
Onuphls sp.

1
10

10

PARAONIDAE

Arlcldea fragilis

ORBINIIDAE

Scoloplos rubra

OPHELIIDAE

Travisla sp.

CAPITELLIDAE

Notomastus hemipodus

123

13

MALDANIDAE

Clymenella mucosa

8

TEREBELLIDAE

Polyclrrus eximlus

1217

STATION 16-9-A

Sediment Type: Sand

Weight percentages — Granules: 0.2
Silts: 0.5

Date: Oct. 18
Sands : 99 . 1
Clay: 0.1

Family and Species

Dredge Shovel Net

PHYLLODOCIDAE

Phyllodoce arenae

HESIONIDAE

Podarke obscura

SYLLIDAE

Syllis sp. B

NEREIDAE

Nereis arenaceodentata
Nereis p_. occlden talis

18

6

GLYCERIDAE

Glycera amerlcana

GONIADIDAE

Glyclnde pacifica

ONUPHIDAE

Dlopatra cuprea
Onuphis magna
Onuphis sp.

1

1

194

ORBINIIDAE

Scoloplos robustus

MAGELONIDAE

Magelona pettlboneae

21

OPHELIIDAE

Travisla sp.

28

CAPITELLIDAE

Notomastus hemipodus

MALDANIDAE

Clymenella mucosa

2
63

1218

STATION 16-9-B

Sediment Type: Sand

Weight percentages — Granules: 1.9
Silts: 1.2

Date: Oct.. 18
Sands: 96.7
Clay: 0.2

Family and Species

Dredge Shovel Net

POLYNOIDAE

Harmothoe lunulata

SIGALIONIDAE

Sthenelais boa

AMPHINOMIDAE

Pseudeurythoe ambigua

PHYLLODOCIDAE

Phyllodoce arenae

HESIONIDAE

Gyptis vittata

SYLLIDAE

Syllis sp. B

NEREIDAE

Nereis arenaceodentata
Nereis £. occidentalis

GLYCERIDAE

Glycera americana

ONUPHIDAE

Diopatra cuprea
Onuphis reagna
Onuphis nebuloaa

EUNICIDAE

Marphvsa sanguinea

17

23

78

PARAONIDAE

Arlcidea sp.

1219
STATION 16-9-B — (Continued)

Family and Species Dredge Shovel Met

SPIONIDAE

Polydora socialis 4

KAGELONIDAE

Magelona pettiboneae " 19

OPHELIIDAE

Travis ia sp. 13

CAPITELLIDflE

Heteromastus filiformls 1

MALDANIDAE

Clynienella mucosa 5g

OWENIIDAE

Ovrenia fusifonnis 1

TERE3ELLIDAE

Loimia medusa 1

SABELLIDAE

Fahricia sabella -j

1220

STATION 16-10

Sediment Type: Sand

Weight percentages — Granules: 4.3
Silts: 3.4

Date: Oct. 18
Sands: 91.0
Clay: 1.3

Family and Species

Dredge Shovel Met

AMPKINOMIDAE

Fseudeurythoe arabigua

PHYLLODC.CIDAE

Phyllodoce arenae
r-hyllodoce i'ragilis

1
61

HESION1DAE

Gyptis vlttata

SYLLIDAE

Exogone dispar.

NEREID&E

Nereis 2. oecidentclir.
Nereis sv.cclnea
Plcitvnere j .s durrerilii

12
16

C2

44

1

NEPHTY1DAE

Aglaophamus verrilli

32

GLYCEFUDAE

Glycera ainericana

ONUPHIDAS

Diopatra cuprea
Onuphis nebulosa

6
1

10

L'JMBFiTNSIf.IDAE

Lurnbrinerif bassl
IiUiTibrineris erccta
Lumbrineri^ sp.

ORBIHIIDAE

Scsloplps robustus
Scoloclos rubra

f

!

1221

STATION 16-10 — (Continued)

Family and Species Dredge Shovel net

SPIONIDAE

Paraprionospio pinnata 1

Polydora websteri 3

Prionosplo h, t ex ana 2

«

MAGELCNIDAE

Maqelona pettiboneae 1

CHAET0PT3RJDAE

Chaetopterus variopedatus 1 1

Splochaetopterus c. oculatus 3

CIRRATUL1DAE

Cirratulus grand is 4

FLABELLIGERIDAE

Phenisa argnosa 5

OPHELIIDAE

ATjnotryoarie aulcaaster 1

Travisia sp. 5

MALDANIDAE

Branchioasychis^ americana 8
Clymenella mucosa 2

OWENIIDAE

Owenia fy^iXonnis 1

Hyricchele sp. 3

SAEELLAKIIBAE

Sabellaria florldensis 2

Sabellaria gracilis 63 34

AMPHAFJSTIDAS

MSiiSsk Pulchella 6

TEREBELLIDAE

Pista palrnaba 2 1

STATION 16-11

1222

Sediment Type: Sand

Weight percentages — Granules: 5.7
Silts: 2.2

Date: Oct. 2 3
Sands: 91.6
Clay: 0.5

family and Species

Dredge Shovel Net

SIGALIONIDAE

Sthenelaia boa

PHYLLODOCIDAE

Eumiria sanguined
Phyllodoce arenae
Phyllodoce f ragilis

H2SI0NIDAE

Gyptis vittata

SYLLIDAE

Exogone dispar

NEREIBAE

Nereis o. occidentalis
Nereis succinea

10

13

NEPHTYIEAE

Aglaopha-rms verrilli

GONIADIDAE

G3.yci.nde pacif ica

ONUPHIDAE

Diopatra cuprea

LUMBP.INERIDAE

Lunibrineris erecta

PAKACNIDAE

Aricidea fragilis

SPIONIDAE

Apopricnospio pygrnaea
Paraprlonospio pinnata
Polydora sociaiis

f

122:

STATION 16-11 — (Continued)

Family and Species Dredge Shovel Net

CHASTOPTERIBAE

Chaetopterus varioped.atus 1

Spiochaatopterus c_. oculatus 4

CIRRATULIDAE °

Cirraformia f iliaera 1

Cirratulus sp. B 3

O.PHELIIDAE

Arrnandia agilis 33

MALDAHIDAE

Clymenella mucosa 26

OWENIIDAE

Myriochele sp. 1

i? ABSIjLiARX II3AE

Sabe.llar.ia gracilis 15

AMPHARETIDAE

Isolda pulchella 2

Helinna waculata 1

1224

STATION 16-12

Sediment Type: - Date: Oct. 25

Weight percentages — Granules: - Sands:

Silts: - Clay:

Family and Species Dredge Shovel Net

SIGALIC'NIDAE *

Pholoe sp. 1

CHRYSOPETALIDAE

Paleanotus heteroseta 34

PilYLLODOCIDAE

Phyllodoee fraoilis 2

SYLLTDAE

Exogone dispar 6

Sphaerosyllir sp. 12

Syllls sp. A 48

GIYCERIDAE

Glycera ainericana 1

GONIADIDAE

GoniadsJ.la sp. 10

ORBINIIDAE

Scoloplos rubra 9

CHAETOPTERIDAE

Chaetopterus variopedatus 1

CIRRATOLIDAE

Cirratulus sp. A 8

CAFITELLXDAE

Heteroroastus fillfonnis i

MALDANIDAE

Ciyrosnella mucosa \

TERESELLIDAS

Polycirrus exiirdus 2

12 25

STATION 16-13

Sediment Type: Sand Date: Oct. 25

Wai?ht percentages — Granules: 4.4 Sands: 93.3

Silts: 1.9 Clay: 0.5

Family and Species Dredge Shovel Net

SIGALIONIDAE

Sigalion arenlcola 6

Pholoe sp. 1

CHSYSOPETALIDAE

Paleanotus he tero seta 132

PHYLLODOCIDAE

Phyllodoce arenae

8

Phvllodoce fracrilis

15

HESIONIDAE

Podarke obscura

1

PILARGJCDAE

Siqan.bra bassl

1

SYI.LIPAE

Brania clavata

20

Exoqone dispar

350

Sphaerosyllis sp.

3

SvlliS sp. A

220

Syllis sp. B

75

NESEIDAE

Ceratonereis irritabilis

1

GONIADJDAE

Gonladella sp. 81

ONUPHIDAS

Or.uphls nebulosa 89

KUN.TCIDAE

Ngmatgnergis hgbgs 12

I

I

1226

STATION 16-13 — (Continued)

Family and Species Dredge Shovel Net

LUMBRINERIDAE

Lunibrlneris erects 1

ARABELLIDAE .

Arabella irlcolor 2

Dxilonereis cylindrica 1

ORBINIIDAE

Scoloples robustus 12

Scoloplos rubra 9

FARAONIDAE

Aricldea taylori 3

Cirrophorus furcatus 4

SPIONIDAE

Polydora soclalls 15

Pr.lonospio h. texana 23

Spio setosa 8

MAGELONIDAE

Maqelona pettlboneae 3

CHAETOPTERIDAE

Spiochaetopterus c. oculatus 5

OPHELJIDAE

Armandia agllis 22

Trayisia sp. 5

CAPITELLIDAE

Heteromastus filifonnis 6

CIRRATULIDAE

Cirratulus

sp. A

Cirratulus

sp. B

Cirratulus

sp. D

Tharyx sp.

C

L22-;

STATION 16-1.3 — (Continued)

Family and Species

Dredge Shovel Net

MALDANIDAE

Clymcnella mucosa

67

OWENIIDAE

Owenia fusifonnis
Myriochele sp.

6

4?

AMPHARETIDAE

X sol da pulche.lla

TEREBELLIDAE

Polycirrus exiraius

58

SABEI.LIDAE

Fabricia sabella

108

1228

STATION 16-14

Sediment Type: Sand Date; Oct. 25

»?eight percentages — Granules: 7.9 Sands: 91.6

Silts: 0.4 Clay: 0.1

Family and Species Dredge Shovel Net

POLYNOIDAE

Hamiothoe lunulata • 4

SIGALIOHIDAE

Siqalion srenicola 8

Pholoe sp„ 4

CHRYSOPETALIDAE

Paleanotus heteroseta 56 3

PHVLLODOCIDAE

Bumida sar.guinea 2

Phvllodoce arenae 1

E^il£<LP_9ir. ££33i±i:5. 15 34

HESIONIDAE

Fodarke obscma 2

SYLI.IDAE

Exoerone dispar .21 3

Syllin £Mc_i_iis ■ 3

Syllls sp. A 1

NEREIDAE

Nereis succinea 2

GLYCEklDAE

Glycera amer icana 18

GONIADIDAE

Goniadella sp. 57

ONUPHXDAE

On aphis nebulosa . 1

ECKTCIDAB

Eunice rubra 1

Sema toner sis hebes 10 2

1229
STATION 16-14 — (Continued)

Family and Species Dredge Shovel Net

AR&BELLIDAE

Arabella iricolor 2

DORVILLEIDAE

Oorvill,ea rudolphi ° 1

CRBINIIDAE

Scolpplos robustus 1

Scoloplos rubra 101

PARAONIDAE

Aricidea tavlorl 5

Cirrophorus furcatus 7

SPIGXJDAE

frionospio h. texana ' 5

P0ECXL0CHAETIDA2

Foecilochaetus Johns oni 2

OTWSTOPTBRIDAE

Chaetopterus variopedatus 1

CIRRATULIDAE

Cirratulus sp. A 103

CAPXTSLLIDAE

BSjIigllS. capitata 1

Hateromastns filiformis IS

KALDANIDAE

Clymeriella mucosa 77 j

0WSN11DAE

Crania fusiformis 1

Myriochele sp. 4

SABBtXJUtXIDAE

Sajbellaria gracilis X

1230

STATION 16-14 ~ (Continued)

Faraily and Species

Dredge Shovel Net

TEREBELLIDRE

Polycirrus exiinius

Thelnpus setosus

12

1

1231

STATION 16-15

Sediment Type: Sand Date: Oct. 25

Weight percentages — Granules: 2.5 Sands: 96.3

Silts: 1.0 Clay: 0.2

Family and Species Dredge Shovel Net

SIGALIONIDAE

Siaallon arenicola 16

CHRYSOPETALIDAE

Paleanotus heteroseta 75

PHYLLCDOCIDAE

Phyllodoce arenae 9

Phyllcdoce fragilis

HESXOHIDAE

Podarke obscura 1

SYLLIDAE

Exogone dispar 170

Syllis variegata

Sphaerosyllis sp. 1

Syliis sp. B 14

NEREIDAE

Coratonereis irrltabilis 2
Nereis succinea

NEPHTYIDAE

Hep'ntys pieta 1

GCNIADIDAE

Goniadella sp. 134

OHUPHIDAE

pnuphls nebulosa 9

LUMBRZNERIDAE

Lurabrineris erecta 1

1232
STATION 16-15 — (Continued)

Family and Species Dredge Shovel Net

ORBINIIDAE

ScolOPlos rubra 15

PARAONIDAE

Cirrophorus furcatus 1

SPIONIDAE

Polydora socialis 6

Prionospio h. texana 6

Scolelepis squamata 1

SpjLo cetosa 12

SPIONIDAE

Pseudopolydora sp. X

CHAETOPTERIDAE

Chaetopterus yariopedatus

CIRRATULIPAE

Cirratulus up. A 17

OPHELIIDAE

Araandla agllis 10

Travisia sp. 5

CAPITELLIDAE

Heteroraastus filiforrois 4

MALDANIDAE

Clymenella mucosa 60

0W3NIIDAE

Myriochele sp. 17

SABELLARIIDAE

Sabellaria gracilis 3

AMPHARSTIDA3

Isolds pulchella 1

1233
STATION 16-15 — (Continued)

Family and Species Dredge Shovei Net

TEREISELLIDAE

Polycirrus exlro.lus 20

SABELLIDAE

Fabricia sabella 12

STATION 15-16

1234

Sediment Type: Sand

Weight percentages — Granules: 0.5
Silts: 0.2

Date: Oct. 25
Sands: 99.2
Clay: 0.1

Family and Species

Dredge Shovel Net

SIGALIONIDAE

Slgalion arenicola

CHRYSOPETALIDAE

Paleanotus heteroseta

FKVLLGDOCIDAE

Phyllodoce arenae

SYLLIEA2

Exogone dispar
Svllla sp. A

Syllis sp. E

34
30
42

NEREIDAE

nereis arenaceodentata

GLYCERIDAE

Glvcera arnericana

GOKIADIDAE

Goniadella sp.

16

ONUPHIDAE

Onuphls nobulosa

ORBINIIDAE

Scolcplos rubra

SPIONIDAE

Paraprionospio pinnata
Polydora sociaiis
Prionospio b. to.<ana
Spio getoaa

1

1

13

61

STATION 16-16 — (Continued)

1235

Family and Species

Dredge Shovel Net

CHAETOPTERIDAE

Chaetooterus varlonedatus
Spiochaetopterus c. oculacus

CIRRATULIDAE

Cirratalus sp. A
Cirratulus sp. D

OPHELIIDAE

Ann and la agllis
Travis la sp.

12

■J A

CAPITELLIDAE

Heteromastus filiform.is

82

MALDM1IBAE

Clymenella mucosa

20

10

TSREBELLIBAE

Polycirrus eximlus

59

1236

STATION 16-17

Sediment Type: Sand

Weight percentages — Granules: 1.0
Silts: 1.1

Date: Oct. 28
Sands: 97.6
Clay: 0.2

Family and Species

Dredge Shovel Net

SIGALIONIDAE

Sigalion arenicola

CHRYSOPETALIDAE

Paleanotus heteroseta

PHYLLODOCIDAE

Pbyllodoce arenae

HESICNIDA2

Podarke obscura

SYLLIDAE

E::ogor,c dicpar
§XlM£ variec)ata
Evil is sp. B

20
34
14

NEREIDAS

Nereis succinea

GONIADIDAE

Goniadella sp.

11

14

ONUPHIDAE

Onuphis nebulosa

ORBINIIDAE

Scoloplos

rub

ra

SPIONIDAE

Polydora a

oci

alls

Prionospic

i h.

texana

Spio satosa

1

7
11

1237

STATION 16-17 — (Continued)

Family and Species Dredge Shovel Net

CHAETCPTERIBAE

Chaetopterus variopedatus 1
Spiochaetopterus c. oculatus

CIRRATUI.IDAE

Cirratulus sp. A 1

OPHELIIDAE

Ariandia agilis 12

Tcavisla sp, 4

CAPITELLIDAE

Heteromastus filiformis 26

MALDANIDAE

Clymenella ciuccsa ' 16

OWENIIDAE

Owenia fusiforrais

Myriochele sp. 4

TEREBELLIDAE

Polyc.irrus eximius 22

SA3ELLIDAE

Fabricia sabella

1238

STATION 16-18

Sediment Types Sand _ Date: Oct. 28

Weight percentages — Granules: 2.3 Sands: 97.1

Silts: 0.4 Clay: 0.1

Family and Species Dredge Shovel Net

PCLYNOIDAE

Lepidonotus sublevia 1

OUUPHIDAE

Qnuphis nebulosa j.

EUNICIDAE

Eunice rubra j

CHAETOPTERIDAE

Chaetopterus variopedatus J,

1239

STATION 16-19

Sediment Type: Shelly Sand
Weight percentages — Granules: 28.8
Silts: 1.7

Date: Oct. 28
Sands: 68.8
Clay: 0.8

Family and Species

Dredge Shovel Net

PHYLLODOCIDAE

Phyllodoce arenae

HESIONIDAE

Podarke obscura

SiTLLIDAE

Exogone dispar

NEPEIDAE

Nereis succinea

GONIADIDAE

Glycir.de pacifica

ORBINIIDAE

Sco.loplos rubra

PARRONIDAE

Aricidea fraailis

SPIONIDAE

Apcprionospio pyqraaea
Polydgra socialis

CIRRATULIDA3

Clrratulus sp. B

OPHELIIDAE

Armandia agilis
Travisia sp.

MALDAKIDAE

Clvmenella mucosa

SftBELLARJIDAE

Sabellaria gracilis

STATION 16-20

1240

Sediment Type: Sand

Weight percentages — Granules: 0.6
Silts: 3.7

Date: Oct. 28
Sands : 95.1
Clay: 0.5

?amiiy ana Species

AMPHINOMIDAE

Pseudenrythoe aiiibiqua

PHYLLODOCIDAE

Phyllodoce arenae

SYLLIDAE

Exogone dispar

Dredge Shovel Net

NEREIDAE

Nereis succinea

40

NSPHTVIDAE

Aglasphamus verrilli

OHUPHl'DAE

Onuphis sp„

EUNICIDAE

Eunice rubra

LUMBRINEP.IDAE

IiUicbrineris erecta
Lurnbrlneris sp.

ORBIMIIDAE

ScolQPlos robustus

PARAONIDAE

Aricldea fraqilis
Arleidea sp.

STATION 16-20 — (Continued)

1241

Family and Species

Prionospio h. texana
Spiopnanes boaibyx

Dredge Shovel Net

SPIOHIDAE

Apoprionospio pygmaea
P_arBprior.osp.io pinnata
Polvdora socialis

17

20

1

1

1

MAGELONIDAE

Kacelona pettiboneae 1

CHAETOPTSRIDAE

Chaetopterus variooedatus

Spi ochaetopterus c. oculatus 19

CIRRATULIDJiE

Clrratulus sp. A

OPBELXXOAE

tewandia agills 2

MALDANIDAE

Branchioass'chis americana 3
Clynenella mucosa 1

OWEHIIDAE

Myriochele sp. 2

AMPHAJSBTIDAE

Isolda pulchella

1.242

STATION 16-21

Sediment Type: Sand

Weight percentages — Granules: 1.7
Silts: 4.7

Date: Oct. 28
Sands: 92.4
Clay: 1.2

Family and Species

Dredge Shovel Net

PHYLLQDOCIBAE

Phyllodoce arenas
Phylloacca rragilis

3
4

SYLLIDAE

Sxogatie dispar
Svllis sp. B

NEREIDAE

Nereis succinea

11

NEPHTYIDAE

Aglaophainus verrilli

GONIADIDAE

Glycinde pacif lea

ONUPHIDAE

Diopatra cuprea
pnuphis sp.

LUM3RINERIDAE

Lurebrineris sp.

33

ORBINIIDAE

Scoloplos robustus
Sco?.oplos rubra

19
5

PAPJVOKIDAE

Aricidea fragills
Aricidea sp.

5

ie

STATION 16-21 — (Continued)

1243

Family and Species

Dredge Shovel Net

SPICNIDAE

Apoprionosplo pygroaea
Parnprionospjo pinnata
Polydora socialis
Prionospio h. texana
Splo setosa

10
6

3

1

MAGELONIDAE

Maqelona petti boneae

CIIAETOPTERIDAE

Chaetopterus variopedatus i

Spiochaatopterus c. oculacus 37

CIRRATULIDAE

Cirratulus grandis ■ 2

Cirratulus sp. B 11

OFKELIIDAE

Arm and ia agtlis

CAPITELLIDAE

Heteromastus filiformii

KALDANIDAE

Branch! oasychis americana
Clynienella mucosa
Maldar.e sarsi

OWENIIDAE

Myriochele sp.

AMPHARETIPAE

Isolda pulchella

16

STATION 16-22

1244

Sediment Type: Sand

Weight percentages — Granules: 1.0
Silts: 2.5

Date: Oct. 28
Sands: 95.9
Clay: 0.6

Family and Species

SIGALIONIDAE

Ethenelais boa

PHYLLCDOCIDAE

Phyllodoce arenae

HESIONIDA3

Pod ark e obscura

SYLLIDAE

Exogone dispar

NEREIDAE

Dredge Shovel Net

NEPHTYIDAE

Aglaophainus verrilli
Kephtys picta

GONIADT-DAE

Glycin.de pacifica

ONUPHIDAE

Onuphis nebulas a

LUM3SINERIDAE

Lurabrir'.eris bassi
Lurobrinsris erecta
lumbrineris so.

1

1

29

ORBINIIDAE

Scoloplos robustus
§£2l°Pl£~L rubra

PAPAONIDAE

Aricidea fraailis
Aricidea taylorl
Aricidea sp.

23
. 6

2
1

.12

/

1245

STATION 16-22 — (Continued)

Family and Species

Dredge Shovel Net

SPIONIDAE

Apoprionosplo pyqraaea
Paraprionospio pinna ta
Polydora socialis
Prionospio h. texana
Spiophanes bombyx

30
19

3
3

CHAETOPTKRIDAE

Chaetopterus variopedatus 1
SPiochaetopterus £. oculatua 37

CIRRATULIDAE

Cirratulus grandis
Cirratulus sp. B

CAPITELLIDAE

Notoniastus hemipodus

MALDAHXDAE

Br?nchloasychis americana
Clymenella mucosa

ia

OWENIIDSE

Owenia fuslformis

AHPHARETTDAE

Isolda pulchella

TEREBELLIDAE

f olycirrus eximius

STATION 16-23

124-5

Sediment Type: Sand

Weight percentages — Granules: 2.7
Silts: 1.8

Date: Nov. &
Sands: 95.2
Clay: 0.3

Family and Species

POLYN01DAE

Polynoid B

SIGAI.IONIDAE

Sthenelais boa

PmfLLODOCIDAE

Phyllodoce arenae

KEPHTYIDAE

Aglaophanius verrilli

GONIADIDAE

Clyclr.de pacifica

ONUPHIDAE

Onuphls sp.

Dredge Shovel Net

LUMERINERIDAE

Lumbrineris erecta
Luinbrineris sp.

5
30

ORBINIIDAE

ScoloplOB robustus
Sco3oplos rubra

42

6

PARAONIDAS

Aricidea fragills
Aricidea sp.

1
6

SPIONIDAE

Apoprior.ospio pygmaea

CHAETOPT3RIDAE

Spiochaetoocerus c. oculatus

11

1247

STATION 16-23 — {Continued)

Family and Species Dredge Shovsl Ret

CIRRATULIDAE

Cirratulus grandis 1

Cirratulus sp. b 2

OPHSLXIDAE

Arm and i a agilis 2

Travis la sp. 17

CAPITELLIDAE

Kotomastus hemipodus 1

MALDANIDAE

Branchioasychis araericana 10
Clymenella mucosa 2

OKENIIDAE

Owen i a fusiformis 14

PECTIN ARIIDAB

Cist^nides qouldij. 1

ftMPH&RETlDAE

Iso Ida pulchella 17

SABELTjIDAE

Fabricia sabella 10

1248

STATION 16-24

Sediment Type: Sand Date: Nov. 6

Weight percentages — Granules: 0.5 Sands: 99.2

Silts: 0.2 Clay: 0.1

Family and Species Dredge Shovel Net

POLYNOIDAE

Harmothoe lunulata 2

SIGALIONIDAE

Sigalion arenicola 1

PIIYLLODOCIDAE

Phvllodoce arenae 5

SYLLIDAE

Exogone dispar 31

Svllis sp, A • 66

Syllis sp. B 16

NEREIDAE

Nereis arcnaceodentata i

GONIADIDAE

Glyc.inde pacifica 1

LUMBR.TNSRIDAE

Lurabrineris bassi 1

OR3INIIDAE

Scoloplos robustus 3

Scoloploa rubra . 1

OPHELIIDAE

Arrnarsdia agilis i

Travisia sp. 70

CAPITELLIDAE

Heteromastus filiformis 3

1249
STATION 16-24 — (Continued)

Family and Species Dredge Shovel Net

MALDANIDAE

Clymenella nuicosa 44

OWENIZDAE

Owen i a fuslformis 4

STATION 16-25

1250

Sediment Type* Sand

Weight percentages — Granules: 1.0
Silts: 0.6

Date: Nov. 6
Sands: 98.3
Clay: 0.2

Family and Species

Dredge Shovel Net

HESIONIDAE

Gyptis vittata

PILARGIDAE

Cabira incerta

SYLLIDAE

Syllis aciculata
Syllis sp. B

6
12

NEREIDAE

Nereis arenaceodcntata
Nereis p. occider.talis

30
2

GLYCEBIDAE

Glvcera aroer icana

GONIADIDAE

Glycin^e pacifica

ONUPHIDAE

Diopat-ra cuprea
Onuphis nebulosa
Onuphis sp.

385

2

4
113

PARAOIIIDAE

Aricidea fraailis

SPICNIDAE

Polydora socialis
Prionospio h. texana

47
1

MAGELGM1DAE

Hagelona pettiboneae

1251
STATION 16-25 — (Continued)

Family and Species Dredge Shovel Net

CHAETOPTERIDAE

Spiuchaetopterus c. oculatus 2

CIRRATULIDAE

Cirratulus sp. B 1

Thary": sp, A 1

Tharyx sp. C 1

CAPITELLIEAE

Capitella capitata 2

Heteromastus filiformls 5

JIALDANIDAE

Clymenella irucosa 22

OWKNIIDAE

Owenia fusiformis 3

SABELLARIIDAE

Sabellaria gracilis 2

PECTINARIIDAE

Cistenideg gouldii 2

TSREBELLIDAE

The Is pus setosus 3

SABELLIDAE

FabricJ[.a sabella 134

1252

STATION 16-26

Sediraent Type: Sand

Weight percentages — Granules: 0.3
Silts: 1.8

Date: Nov. 6
Sands : 97.3
Clay: 0.6

Family and Species

HESIOHIDAE

Gyptis vittata

PILARGIDAE

Cabira tncerta

Dredge Shovel Net

NEREIDAE

Laeonereis culvert
Nereis arenaceodentata
Nereis succinea
Platvnereis dumerilii

ONUPHIDAE

Plopatra cuprea
Oauphls nebulosa

Onughis sp.

SPION1DAE

Polvdora socialis

MAGELONIDAE

Magelona pettiboneae

CHAETOPTEF.IDAE

Spiochastopterus c. oculatus

CIRRATULIDAS

Tharyx sp. C

OPHELIIDAE

Arniandia aqilis

1
12

a
l

25
l

4

19

MALDANIDAE

Clynenella mucos;

STATION 16-25 — (Continued)

1253

Family and Species Dredge Shovel Net

FECTIHARIIDAE

Cistenides gouldii 1

AMPHARETIDAE

Isolda pulchella 1

Melinna rcacalata 4

STATION 16-27

1254

Sediraent Type: Sand

Height percentages — Granules: 1.8
Silts: 2.1

Date: Nov, 6
Sands: 95.5
Clay: 0.6

Family and Species

Dredge Shovel Net

POLYODOHTIDAE

Polydontes lupina

CHRYSOPETALIDAE

Paleanotus hetaroseta

AKPHINOKIDAE

Pseudeurythoe amblgua

PHYLLCDOCIDAE

Eteone hgteropoda
Phyllodoce arenas
Phyllodoce fragllis

1

28

1

HESIONIDAE

Gyp t is vittata

SYLLIDAE

Exogone disbar

HKREIDAE

Nereis succlnea

NEPHTYIDAE

Kephtys picra

GQHIADIDAE

Glycinue paci.fica

ONUPHIDAE

Diopatra currea
Onuphis nebulosa

17

1
363

LUMBKIN2P..TDAE

Lumbrlnerls coccinea

24

STATION 16-27 — (Continued)

1 255

Family and Species

Dredge Shovel Net

ORBINIIDAE

Scolcplos rubra

PARAONIDAE

Arlcidea sp.

SPIOKIIDAE

Spiophanes bombvx

14

4

CHAETOPTERIDAE

Spiochaetopterus c. oculatus

CIRRATULIDAE

Thary_x sp. C

FIABELLIGERIDAE

Pheruss arenosa

OPKELIIDAE

Tra}/_isi^ sp.

33

CAPITELLIDAE

Hetercraastus filiformis

MALDANIDAE

Clyrpenella mucosa

OWENIIDAE

OwenjLa fusiformis

10

AMPHARETIDAE

Isolda pulchella

Melinna r.iaculata

20

1

TEREBELLIDAE

Pista crlstata
iSLlySiHl^ gxigius
33l§i£E'i2. sstosus
Trichgbranchus crlaeialis

1256
STATION 16-27 — (Continued)

Family and Species Dredge Shovel Net

SAB2LLIDAE

Fabricia sabe.lla 45

Megalorama bioculatum 3

1257

STATION 16-28

Sediment Type: Shelly Sand Date: Nov. 6

Weight percentages — Granules: 20.3 Sands: 79.6

Silts: 0.0 Clay: 0.0

Faraily and Species Dredge Shovel Net

SYLLIDAE

Syllis auiculata 1

SvJKLis sp. B 8

SEREIDAE

Nereis arenaceodentata 1

SPIONIEAE

Scolelepis sguamata 3

CAPITEbLIDAE

C'apitel.la capitata 1

Capltellides ionesi 1

MALDANIDAE

Clymenella rr.uccsa 1

1258

STATION 17-i

Sediment Types Sand

Weight percentages — Granules: 0.0
Silts: 0.2

Date: Oct. 2 3
Sands: 99.8
Clay: 0.1

Family and Species

NEREIDAE

Platynereis dumerilii

Dredge Shovel Net

OSUPHIDAE

Cnuphis magna
Qnuphis sp.

LUMBRINERIDAE

Lumbrineris eracta

OFHELIIDAE

Travisia sp.

ARENICOI.VDAK . .

Aren-icola cristata

MALDANIDAE

Clyroenella mucosa

PECINARIIDAE

Cistenides gouldii

1259

STATION .17-2

Sedlrcent Type: Sand Date: Oct. 29

Weight percentages — Granules: 1.7 Sands: S4.9

Silts: 2.7 Clay: 0.7

Family arid Species Dredge Shovel Net

POLYKOIDAE

Harraothoe Lunulata 2

Lcpidasthania corjnensalis I
Lepidonptus variabilis

SIGALIONIDAS

Siaalion arenicola 2

Sthenelals boa 11

CHRYSOPETALIDAE

Paleanotus heteroseta 21

PHYLLODOCIEAE

liaEgJliliiss speciosa 1

¥J££llSdO££. arenae 6

PILAKGIDAE

Sigarabra tentaculata 1

SYLLIDAE

Exog one dispar 206

SylllB gracilis 3
Sy_l_lis variegata

Sphaerogyllis sp. 1

Syili s sp. A 205

NEREIDAE

Nereis succinsa 7

Platynereis dinner ilii 5

NEVKTYIDAE

Aglaophainus verrilli 2

GLYCERIDAE

9!kl£££*:. a^ericana 7

STATION 17-2

(Continued)

Family and Species

Dredge Shovel Ket

GONIADIDAE

Goniadella sp.

27

ONUPHIDAE

Onuphis magna
Onuphis nebulosa
Onuphis sp.

1

931

4

EUNICIDAS

Marphvsa Fanguinea

LUMBRINEPIDAE

Lurobrineris cnccxnea

Luriibr.ineris erecta

Lumbrinerls latroilli

APABELLIDAE

Arabella iiicoioc

DORVILJEIDAE

Dorvillea rudolphi

ORBINIIDAE

ScoloD.los robustus

PARAONIDAE

Aricidea fragilis
Aricidea taylori
Cirrophorus furcatus

SPIONIDAE

Paraprionosnio pinna*
Pplycora cocialis
Pricnospio h. texana
Scolelepis sguatnata
Sp_io setosa
5p.xoph.anes boiabyx

]

SO

12

2

5

■ 1

MAGELONIDAE ■

Magelona pettiboneae

1261

STATION 17-2

(Continued)

Family and Species

Dredqe Shovel Net

POECILOCHAETIDAE

Poacilochaetus johnspni 2

CHAETOPTERIDAE

Chaetopterus variopedatus • 2
Spiochaetopterus c. gculatug 4

CIRRATULIDAE

Cirratulus so. A

Cirratulug sp. B

Cirratulus so. D

43
8

2

OPHELIIDAE

Annandia aqi.lis
Travis la sp.

:apitellidae

Heteroraastus f littorals

MALDANIDAE

firancliioasychis aroaricana
Clymer.e.lla mucosa

58

OWENIIDAE

Owenia fusif orrois
Myriochele sp.

4
16

SABELLARIIDAE

Sabellaria f lorldensis
gabellaris gracilis

AMPHARETIDAE

Isold?, pulchella

1

14

15
4

TEREEELLIDAE

Loir.jia rredusa
Polycirrus exlmlus
Theleoas setosus

5
.16

1262

STATION 17-2 — (Continued)

Family and Species Dredge Shovel Set

SABELLKAE

Fabricia sabella 82

Msgaloniraa lobiferum 1

SERPULIDAE

Euoomatus dianthus l

1263

STATION 17-3

Sediment Type: Sand

Weight percentages — Granules: 5.6
Silts: 0.7

Date: Oct. 29
Sands: 93.6
Clay: 0.1

Family and Species

POLYHOIDAE

Earmothoe lunulata

SIGAI.IOHIDAE

Sigalion arenicola

PI3IONIDAE

Pisione remota

Dredge Shovel Net

CHKYSOPETALIDAE

Paleanotus heteroseta

AMPHINOMIDAE

Pseudeurvthoe ambigua

SYLLIDAE

Exogone die par
Syllis aciculata

Syllis sp. A

GLYCERIDAE

Glycera americana

GOSIADIDAE

Goniadella sp.

OKUPHIDAE

Onuphis nebulgsa
Onuphis sp.

ARABELLIDAE

Drilonereis magna

DORVIUEIDAE

Dorvillea rudolphi

123

1

1

3

15

13

101

12

1

1264

STATION 17-3 — (Continued)

Family and Species Dredge Shovel Net

ORBINIIDAE

Seoloplos rubra 17

3PIONIDAE

Apoprionospio pygmaea 5

Spio setosa 13

CIRRATULIDAE

Cirratulus sp. A 75

CAPITSLLIDAE

Dasybranchus lumbricoides 1

MALDAHIDAE

Clyirienella mucosa 22

OWENIIDAE

Myriochele sp. 1

TEREBELLIDAE

Polycirrus exiinius 2

SABELLIDAE

Fabrlcls sab&lla 1

STATION I'i

1261

Sediment Type : Sand

Weight percentages — Granules: 2.8
Silts: 1.2

Date: Oct. 29
Sands: 95.6
Clay: 0.5

Family and Species

Dredqe Shovel Net

SIGALIONICAE

Sigalion aren.icola

CHRYSOPETALIDAE

Paleanotus heteroseta

27

PHYLLODOCIDAE

Paranaites speclosa
Phyllodcce arenae

2

4

PILARGIDAE

Ancistrosyllis ionesi

SYLLIDAE

Expaone di.spar
Sphaerosyllis sp.
Syllis sp. A

32

6

15

GONIADIDAE

Goniadella sp.

55

ONUFHIDAF.

Onuphis nebulosa
Onuphis sp.

10

S

ORBINIIDAE

Scolssplos rubra

SPIOKIDAE

Prlonospio h. taxana
Spio setosa

Pseudopolydora

5

39

8

CIRRATULIDAE

Clrratulus sp. a
girratulus sp. D

T}^ary_x sp. C

13
4

1

1266

STATION 17-4 — (Continued)

Family and Species Dredge Shovel Net

OPHELIIDAE

Arroandia aqi.Xis 3

Travis la sp. 2

CAPITELLIDAE

Heterornastus f iliformis 2

MALDANIDAE

Clyinenella mucosa 23

Clymenella zonalis 1

OWENIIDAE

Myriochele sp. 4

SABELLARIIDAE

Saoellaria gracilis 1

terebelljdae

Poly-cirrus exlrnius 11

/

1267

STATION .1.7-5

Seciiirent Type: Sand
Weight percentages — Granules < 4.2
Silts: 1.8

Date: Oct. 30
Sands: 93.5
Clsy: 0.5

Family and Species

Dredge Shovel Net

CHRYSOPETALIDAE

Paleanotus heteroaeta

PHYLLODOCIDAE

Phyllodoce arenae
Phyllodoce fragilis

HESIONIDAE

Podark.e obscura

10

SYLLIDAS

Exogone disbar
Svllis^ sp. A
B

25
4
3

NE RE IDAS

Nereis succinea

23

NEPHYTTDAK

Aglaophamus verrilll

46

G0NIAD1DAE

Goniadella sp.

ONUPH.TDAF,

Onuphis nebulosa
Onuphis sp.

53
17

EUNICIDAE

Eunice rubra
Nematon^reis hebes

LUMBRINERIDAE

L'-mtbrincris erecta
Lu.T.brineris latreilli

1260
STATION 17-5 — (Continued)

Family and Species Dredge Shovel Net

APAEELLIDAE

Arabella iricolor 4

SPIONIDAB

Polydora socialis o 2 11

Prionospio h. texana 3

CHAETOPTHRIDAS

Chaatapterus variopedatus 1

Spiochaetopterus c. oculatus 3

CIRRATULIDA5

Cirratulus sp. D 1

OPHELIIDAE

Arw3ndia aqil Is 4 1

Travisia sp. 1

CAPITELLIDAE

Hetero.T,astus filiformis 5

KALDANIDAE

Clyi'.enella mucosa 52

OWENIIDAE

OwenLa fusiforaiis 1

Kyriochele sp. 6

SABELLARIIDAE

Sabellarla flcridensis 1

Sabellaria gracilis 1

AJ1PHARETIDAE

Isolca puichella 30 . 1

SABELLT.DAE

Fa'bricia sabella 64

STATION 17-6

1269

Sediment Type: Sand
Weight percentages —

Granules :
Silts:

6.1
2.1

Date: Oct. 30
Sands: 91.2
Clay: 0.7

Family and Species

SIGALIONIDAE

Sthenelais boa

Dredge Shovel Net

PHYLLODCCIDAE

Paranaitei

sceciosa

Phyllodoco arenas
Phyllodoce fraqilis

HESIONIDAE

Gy.pt is vittata

Podarke obscura

1

26

1

SYLLIDAE

Brauiia

clavata

Exogone disaar
Syllis aclculata
Syllis gracilis
Brania sp.
Sphaerosyllis sp.
syiiis sp. a

Syllis sp. B

1
187

1
1
3

1
2

NEREIDAE

Nereis succinea

NEPHTYIDAE

Aglaophanius verrilli
Nephtys oicta

21
2

36

3LYCER.TDAS

Glycera amerj.car.a

GCNIADIDAE

Goniadslla sp.

1270
STATION 17-6 — (Continued)

Family and Species Dredge Shovel Net.

ONUPHIDAE

Dlopatra cuprea 1

Onupliis nebulosa 21

Onuphjs sp. - 23

UJMBRIHERIDAE

Lmabritteris arecta 9

Luinhris'eris sp. 23

ORBINIIDAE

££2i9Ei£S. rubra 5

PARAONIDAE

Arlcidea fragilts 1

SPIGNIDA3

Apoprionoswio pygmaea 1

Polydoro. Boclalis 7 9

Prlonospio h. texana 10

Splo getgsg 6 l

MAGELONIHJAE

Magelona petttboneae 10

CHAETOPTERIDAE

Chaetopterus variopedatus t_

Sploehaetopterus c. oculatus 17

CIRRATULIDAE

Clrratulus sp. B -3

Tharyx sp. c 2

OPHELIIDAE

Arroandia aqilis 99 4

Travisia sp. 3

CAFITELLIDAE

Heteroonastus flllforwls 3

MALDAHiDAE

Clymenella mucosa 37

f

I

1271

STATION 17-6 — (Continued)

Family and Speciss Dredge Shoval Net

OtHHXXDAB

Ovenia fusiformis 7

Myriochele sp. 16

SABELLAHIIDAE

Sabellaria gracilis 2

PECTINARIIDAE

Cistenides gouldii 1

AMPHARETIDAE

Isolda pulchella 121

TEREBELLIDAE

Terebella rubra 1

SABSLLIDAE

gabricla sabrp la B69

STATION 17-7

1272

Sediment Type: Sand
Weight percentages — Granules; 2.8
Silts: 2.0

Date: Nov. 4
Sands: S4.5
Clay: 0.8

Family and Species

Dredge Shovel Net

PCLYNCIDAE

Harniothoe lunulata

CHRYSOPETALIDAE

Pa 1 eanotus hef.eroseta

AMPHINOMIDAE

Pseudeurythoe ambiqua

PHYLL0D0CIDA2

Phyl.lcdoce cjrenae
Phyllcdoce fragiiis

HESIONIDAE

Gyjotla vittata
Podarke pbscura

SYLLIDAE

E^£53.°ilS. dispar
Brania sp.
Svllis sp. A

23

1
6

HEBEIDAE

Nereis succinea

NEPHTYIDAE

Aglaopl-iamus verrilli
Nephtys picta

25

1

0NTJPHIDA2

Dippatra cuurea
P-D^PlSiil. nebulcsa
Onuphis sp.

2
24
22

STATION 17-7 — (Continued)

1273

Family and Species

Dredge Shovel Net

LUMBRINERIDAE

Lumbrj.rieris erecta
Luinbrlr.eris latrej.lli
Lurnbrineris sp.

3

3
4

ORBIKIIDAE

Scoloplos rubra

SPIONIDAE

Apopricnospjo pygroaea
Polydora sccialis
Prionospio h. texana
Spio setosa

1
4

2

6

MAGELONIDA2

Hagelona pettiboneae

15

CHAETOPTEP.IDAE.

Splochaetopterus c. oculatus

OPHELIIDAK

ftrmandia agilis
Travisia sp.

2r.
1

CAPITEIXIDAE

Heterotnastus filifonr.is

MALDAN1DAE

Branchioasychis aniericana
ClyiTienella mucosa

1

2 2

OWENIIDAE

Owgnla fuslformis

Myriochele sp.

SABELLAP.IIDAE

Sabellaria gracilis

RMPHMBSTIDAE

Isolda pulchella

82

1274

STATION 17-7 — (Continued)

Family and Species

Dredge Shovel Net

TERE3ELLIDAE

Lslmia medusa
Polycirrus esircius
Terebella rubra

SABEI.LJDE

Fabrlcta sabella

79

STATION 17-3

1275

Sediment Type: Sand

Weight percentages — Granules: 8.9
Silts: 2.4

Date: Nov. 4
Sands: 87.8
Clay: 0.9

Family and Species

Dredge Shovel Net

SIGAL.XONIDAE

Sigalion arer.iccla
Sthenelais boa

AMPHIHOKIDAE

Pseudeurythoe amblgua

PHYLODOCIDAE

Phyllcdoce arenas
Phyllodoce frag^lis

HESIONJDAE

G_££tis vittata

SYLLIDAE

Exogone dispar
Syllis; aciculata
Syllis sp. B

B
1

4

NEREIDAE

Nereis arenaceodentata
Nereis p. occidentalis
Nereis succinea

NEPHTYIDAE

Aglaophamus verrilli

42

GLYCERIDAE

Glycera araericana

ONUPHIDAE

Dionatra cuprea
Onuphis nebulosa
Onuphis sp.

1
.10

17

EUNICIDAE

Nemator.ereis hebss

STATION 17-8 — (Continued)

1276

Family and Species

Dredge Shovel Net

LUMBRINERIDAE

Lur.brineris arecta

Lanibrinori:" latreilli

L'.bTibrineris sp.

26

1

112

ARABELLIDAE

Arabella iricolor

ORBINIIDAE

Scoloplos robustus
Scoloolos rubra

22

5

PARAONIDAE

Aricidea fraqilis

23

SPIONIDAE

Apoprionospio pygiraea
P?.rap-rion'v?pio pinna-ca
Polydora social j.s
Spio setosa

11
1

4
13

2-iAGELCaiDAE

Magelona pettlboneae

CHAETOPTE RIDAE

Spiochaetopterus c. oculatus

CIRRATULIDAE

Cirratulus sp. B
Clrratulus sp. C

CPHELIIDAE

Armandia agilis
Travisia sp.

40
21

CAPITELLIDAE

Nptprrastus latericeus

KALDANIDAE

Branchioasychis airierlcana 4

Clyree^.e.Ua mucosa 121

STATION 17-3 — (Continued)

1277

Faiaily and Species

Dredge Shovel Net

OWENIICAE

Owftnia fusiformis

Myriochele sp.

PECTINARIIDAE

Cistenides gouldii

AMPHARETIDAE

Isolda pulchella

C3

TEREBELLZDAE

Pista cristata

Polyclrrus exiraius

SABELLIDAE

Fabrlcla sabella

65

1270

STATION 17-9

Sediment Type: Sand

Weight percentages — Granules: 1.8
Silts: 2.0

Date: Nov. 4
Sands: 95.4
Clay: 0.6

Family and Species

Dredge Shovel Net

SIGALIONIDAE

Sthenelais boa

AMPHINOMIDAE

Pseudeurythoe ambigua

PHYLL0DOCIDAE

Phyllodoce arenae

HESIOSIDAJE

Podarke obscura

FILAP.GIDAE

Siqaitibra tentaculata

SYI.LIDAE

Exogone dispar
SyjUia sp. B

NERBIDAE

Nereis succinea

NEPHTYIDAE

Aqlaophaanus verrilli

2

3
A

ONUPHIDAE

Dlopatra cucrea
Onuphis sp.

I.UMBKINERIDAE

Lumbrineris erecta
Lvrebrineris sp.

6

2 5

OR3ISIIDAE

Scoloplos robustus

1279
STATION 17-9 — (Continued)

Family and Species Dredge Shovel Net

PARAONIDAE

Arlcldea fragilis 33

Arieidea sp, 1

SPIQNTDAE

Apoprionospio pygraaca 30

Paraorionospio pinnata 5

Polydora sogjalis 2

Spio setosa 2

MAGKLOHIDAE

Magelona pettiboneae 3

CHAETOFTERIDAE

Spiochaetopterus c. oculatus 3

CIRRRTOLIDAE

Clrratulua sp. D 3

OPHELIIDAE

^HH£t,?XE§2£ aulogaster 10

CAPITELLI.DAE

Notomastus hemiDodus 2

H&UDAHI0AE

Branchioasychis air.ericana 11 1

Clyri'Criella mucosa 13 1

Maldane sarsi 2

OWENIIDAE

Owenia fusiform.is 10

Myrlochele sp. 16

PECTI1IARIIDAE

Cisfcenides gouldii 1

AMPHAKETXDAE

Isolds, pulchella 47 2

1280

STATION 17-9 — (Continued)

Family and Species

Dredge Shovel Net

TEREBELLIDAE

Polycirrus exiraius

SABELLIDAE

Fabricla sabella

22

1281

STATION 17-10

Sediment Type: Sand

Weight percentages — Granules: 3.6
Silts: 0.5

Date: Nov. 4
Sands: 95.8
Clay: 0.1

Family and Species

Dredge Shovel Net

PHYLLODOCIDAE

Phyllodoce fragilis

NEPHTVIDAE

Aglaophamus verrilli

GONIADIDAE

Glycinde pacifica

ONUPHIDAE

Diopatra cuprea
Onuphls e. oculata

LUMBRINERIDAE

Lurabrineris erecta
Lumbrineris sp.

ORBIKXIDAE

Scoloplos robustus
Scoloplps rubra

PARAONIDAE

Ariciriea fragilis

SPIOHIDAE

Apoprionospjo pygmaea
^SlililSUL Boclalis
Spio setogg

CIKRATULIDAE

Cirratulus sp. C

15

28

12

5

58

1
13

10

OI'HELIIDAE

AsTimotrypane auloqaster
Travis ia sp.

3£
■1

1282

STATION 17-10 — (Continued)

FeiDily and Species Dredge Shovel Net

CAPITELLIDAE

Heteromastus fllif orrols 1

MALDAKIDAE

Clymenella mucosa » 28

OVJEHIIDAS

Owen.la fusiforrcis 1

Myrlochele sp. 1

AMPHARETIDAE

Isolde pulchella 11

SABELLIDAE

Fabricia sabeila 10

1233

STATION 17-1.1

Sediment Type: - Date: Nov. 19

Weight percentages — Granules : - Sands :

Silts: - Clay:

Family and Species Dredge Shovel Net

POLYNOIDAE

Karmothoe lunulata 1

HESIOSIDAE

Gyp t is vittata 1

NEREIDAE

Nereis succinea 1

ONUPHIDAE

pnuphls nebulosa 1

ARABELLIDAE

Arabella irlcclor 1

Travisia sp. 57

CAPITEI.LIDAE

Notomastus heroipodus 27

MALDANIDAE

Clyrr.enalla nmcosa 13

TEREBELLIEAE

Polycirrus exiroius 1

;84

STATION 17-12

Sediment Type: Sand

Weight percentages — Granules: 0.2
Silts: 0.7

Date: Nov. 19
Sands: 98.9
Clay : 0.2

Family and Species

Dredge Shovel Net

PHYLI/3DOCIDAE

Eteone heteropoda
Phvllodocs arenae

NEPJ2IDAE

Nereis arenaceodentata
Nereis p_. occiden talis
Nereis succinea
Platynereis dumerilii

NEPHTYIDAE

Aglaopharaus verrilli

GCNIADIDAE

Glycinde EScifi ca

LUMBRINERIDAE

Lumbrineris erects

ORBINIIDAE

Scoloplos robustus
Scoloplos rubra

21

2

SPIONIDAE

Apoprionospio pygmaea

OPHEL1IDAE

Amraotrypane aulogaster
Travisia sp.

56
41

MALDANIDAE

Clvmenella mucosa

15

OWENIIDAE

Myrlochele sp.

1285
STATION 17-12 — (Continued)

Family and Species Dredge Shovel Net

AMPHARKTIDAE

Isolda pulchella 10

SAB3LLI.DAE

Fabric la sabella . 2

STATION 17-13

1286

Sediment Type: Sand
Weight percentages —

Date: Nov, 19

Granules :

0.2

Sands: 97.9

Silts :

1.6

Clay: 0.3

Family and Species

Dredge Shovel Net

SIGALIONIDAE

Sthenelais boa

PHYLLODOCICAE

.Steone heteropoda
Faranaites specicsa
Phyllodoce arenae

1
3
6

NEREIDAE

Nereis succinea
Platynerois duroerilii

GONI.ADIDAE

Glycir.de pacifica

ONUPRIDAE

2iSESi£3. cuprea

LUMBRINERIDAE

Lu-nbrineris sp.

ORBINIIDAE

Scoloplos robustus
Scoloplos rubra

SPICSIDAE

Apoprionosplo pygraaea
Paraprionospio pinr.ata

CIRRATULIDAE

Cirratalus crandis

14

1

1

45

OPHELIIDAE

AirifiDtrvpang aulogaster
Travisia so.

19
2

1287
STATION 17-13 — (Continued)

Family and Species Dredge Shovel Net

C&PXTELLXDAE

NotcCTastus latericeus 1

MALDANIDAE

Branchioasychis americana 2
Clymeneila mucosa 1

OWENIIDAE

P^iSBia. fusiformis i

Myriochele sp. 2

PECTINAXIIDAE

Cistenides gouldii 1

AMPHARETXDAE

Isolda pulchella 1

SABELLIDAE

Branchiomma nigroir.aculata

Fabricia sabella 1

Megalomipa bioculatum 1

1283

STATION 17-14

Sediment Typo: Sand

Weight percentages — Granules: 0.0
Silt: 0.5

Date: Nov. 19
Sands: 99.3
Clay: 0.3

Family and Species

Dredge Shovel Net

PHYI.LODOCIDAE

Phyllodoce arenae

NEREIDAE

Nereis arenaceodentata

GONIAD1DAE

Glycinde pacifica

ONUPKIDAE

Onuphis sp.

ORBIN.IIDAE

Scol-"Ei2.s robustus

11

PAPAONIDAE

Aricidea fragilis

SPIGNIDAE

Apoprionospio Eysroaea
Paraprionospio pinnata

9
32

C1RRATULIDAE

Cirriformia sp. A

OPKELIIOAS

tojr.otrypane qulogaster
Travisia sp.

2?

1

CAPITELLIDAE

KotomastL'S latericeue

MALDANIDAE

Clynenella mucosa

STATION 17-15

1289

Sediment Type: Sand

Weight percentages — Granules: 1.6
Silts: 3.9

Date: Nov. 19
Sands: 93.6
Clay: 0.9

Family and Species

Dredge Shovel Net

PILAIcGIDAE

Cabira tncerta

SYLLIDAE

Syllis aciculata

NEREIDAE

Nereis arenaceodentata
Nereis succinea
Platvnereis dumerilii

NEPHTYIDAE

Aglaophaitius verrilli

ORBINIIDAE

Scolnplos rubra

FARAONIDAE

Ariclde?. fragills
Aricidea taylori

CISRATULIDAE

Cirratulus grandis

CAFITELLIDAE

Heteromastus filifoiuis

AMPHAETIDAE

Mellnna maculata

10

19

14
1

142

12

TEREBELLIPA3

Terobeila rubra
Thelepus setosus

STATION 18-3

1290

Sediment Type: Shelly iand
Weight percentages — Granules; 20.8
Siltss 1.6

Date: Oct. 9
Sands: 77.4
Clay: 0.2

Family and Species

Dredge Shovel Net

SIGALIONIDAE

Sigalion arenicola

CHXYSOPETALIDAE

Paleanotus heteroseta

60

AMPHINOMIDAE

Euphrosyne triloba

Pseudeurythoe anibiqua

EESIONIDAE

Podarke obscura

SYLL1DAE

Exogone dispar
Syllis npongicola
Syllis sp. A
Syllis sp. B

5
25

1

2000+

KEREIDAE

ESSSlS. E> occident;;lis
Platvnereis dumerllii

HEPHTYIDAE

Nephtys picta

GLYCERIDAE

91XSSIS americana

GONIADIDAE

Glycinde pacifica

QNUPHIDAE

Onuphis nebulosa

25

STATION 18-3 — (Continued)

1291

Family and Species

Dredge Shovel Net

EUNICIDAE

Eunice rubra

M$£2hX-?J* sanquinea
Neraatonereis hebes

LUMBRINERIDAE

Iiurabrineris erecta 1

iiiaiibrlneris latreilll 10

ARABHLLIDAE

Arabella sp.

DORVILLEIDAE

Dorvlllea rudolphi 6

SPIOMIBAE

A on ides ir.ayaguezensis 8

Frionospio h. tgxana 43

CHAETOPTERIDAE

Spiochaetopterus c. oculatus 1

CIRRATULIDAE

Dodecaceria concharuip

Cirratulus sp. B 1

FLABELLIGERHJAE

Pherusa arenosa 2

25

OPHELII0AE

Ansnotrypane auloaaster
Arroandia agilis

MALDAI1IDAE

Clyrr.enalla mucosa

OWENIIDAF.

Owenia fusiformis

4
14

60

1292

STATION 18-3 — (Continued.)

Family and Species Dredge Shovel Net

AMPHARETIDAE

Isolda pulchella 1

TEREBELI/IDAE

Te rebel la rubra 1

STATION 18-4

1233

Sediment Type: Sand

Weight percentages — Granules: 5.8
Silts: 2.4

Date: Oct. 9
Sands: 90.9
Clay: 0.9

Family and Species

Dredge Shovel Net

PILARGIDAE

Sigair.bra bassi

SYLLIDAS

Brania sp.

NEREIDAE

Nereis succinea

NEPHTYIDAE

Aglaophanms verrilli

ONUPHIDAE

Onuphis nebulosa

LUMBRXHERIDAE

Lumbrineris erecta
Lurabrineris sp.

CRBIN.T1DAE

Scoloplos robustus

SPICNIDAE

Apoprionosplo pyqmaea
Pfionosplo h, texana

Scolelepja sgigamata

Sp_io sctcsa

6

1
1
1

CHAETOPTERIDAE

Mesochaetopterus sp. B

1294
STATION 18-4 — (Continued)

Family and Spades Dredge Shovel Net

OPHELIIDAE

Ammotrypane aulogaster 1

Arroandia agiiis 1

Travisia sp. ■ 9

MALDANIDAE

Clymene.lla mucosa 30

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3I0GRAPHICAL SKETCH

John I,ippincott Taylor was born October 29, 1932,
at Philadelphia, Pennsylvania. In June, 1950, he was
graduated from Germar.town Friends School. In Jvne, 1955,
he received the degree of Bachelor of Arts with ?. sua j or
in Biology from Antioch College. From 1956 until 1958
he served in the United States Marine Corps, following
his discharge from military duty, he enrolled in the
graduate School- of the University of Florida. He worked
as a graduate teaching assistant in the Zoology Department
until June, 1961, when he received the degree of Master of
Science with a major in Invertebrate Zoology. Since then,
he has beer; employed as a Fishery Biologist with the National
Marine Fisheries Service while working toward the degree of
Doctor of Philosophy at the University of Florida.

John Lippincott Taylor is married to the former Patricia
May Bowden. He is a member of the Phi Sigrna Biological So-
ciety, the Florida Academy of Sciences, the Society of Lim-
nology and Oceanography, and the Marine Biological. Association
of the United Kingdom.

133?

I certify that I have read this study and that in my
opinion it conforms to acceptable standards of scholarly
presentation and is fully adequate, in scope and quality,
as a dissertation for the degree of Doctor of Philosophy.

Jt,

'kutit

Robert M. DeWitt, Chairman
Professor of Zoology

X certify that I have read this study and that in my
opinio:: it conforms to acceptable standards of scholarly
presentation, and is fully adequate, in scope and quality,
as a dissertation for the degree of Doctor of Philosophy.

I certify that I have read this study and that in my
opinion it conforms to acceptable standards of scholarly
presentation and is fully adequate, in jcope and quality,
as a dissertation for the degree of Doctor of Philosophy.

^i^^^/73^^

'Frank G. Ncrciie
Professor of Zoology

I certify that I have read this study and that in rny
opinion it conforras co acceptable standards of scholarly
presentation and is fully adequate, in scope and quality,
as a dissertation for the degree of Doctor of Philosophy.

jUS&sL

Ernest
Professor c

jtany

This dissertation was submitted to the Dean of the College
of Arts and Sciences and to the Graduate Council, and was
accepted as partial fulfillment of the requirements for
the degree of Doctor of Philosophy.

August, 1971

<Av « ,,„^A--~' Co ■ ~\l.i "-^j ■

Dean, College of A'rts^ahd Sciences

Dean, Graduate School

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