HARVARD UNIVERSITY Gis 0 LIBRARY OF THE Museum of Comparative Zoology a a Ng a Ne lal a OCT 13 1927 “OF COMPARATIVE Z00L06Y ; th a ~ i * - a ; ‘ aa A i * a MEMOIRS OF THE MUSEUM OF COMPARATIVE ZOOLOGY HARVARD COLLEGE. VOL. XLVIII. CAMBRIDGE, MASS,, U. S. A. Printed for the Museum. 1919. c, * 2 j 3 i 1 ‘ —— sa a a bs x + 4 : a = ‘e eee La “ee ps a et . oe , es Camprier, Mass, U.S.A. 2” Memoirs of the Museum of Comparative Zodlogyp AT HARVARD COLLEGE. Vou. XLVIII. REPORTS ON AN EXPLORATION OFF THE WEST COASTS OF MEXICO, CEN- TRAL AND SOUTH AMERICA, AND OFF THE GALAPAGOS ISLANDS, IN CHARGE OF ALEXANDER AGASSIZ, BY THE U. S. FISH COMMISSION STEAMER “ALBATROSS,” DURING 1891, LIEUT. COMMANDER Z. L. TANNER, U.S. N., COMMANDING. XXXVIII. REPORTS ON THE SCIENTIFIC RESULTS OF THE EXPEDITION TO THE TROPICAL PACIFIC, IN CHARGE OF ALEXANDER AGASSIZ, BY THE U. S, FISH COMMISSION STEAMER “ALBATROSS,” FROM AUGUST, 1899, TO MARCH, 1900, COMMANDER JEFFERSON F. MOSER, U.S. N., COMMANDING. XX. REPORTS ON THE SCIENTIFIC RESULTS OF THE EXPEDITION TO THE EAST— ERN TROPICAL PACIFIC, IN CHARGE OF ALEXANDER AGASSIZ, BY THE U. S. FISH COMMISSION STEAMER “ALBATROSS,” FROM OCTOBER, 1904, TO MARCH, 1905, LIEUT.-COMMANDER L. M. GARRETT, U. S. N., COM- MANDING. XXXI. THE ANNELIDA POLYCHAETA. By RALPH V. CHAMBERLIN. WITH EIGHTY PLATES. PLATES. [Published by permission of Hucu M. Sirs, U. 8S. Commissioner of Fish and Fisheries]. CAMBRIDGE, U. S. A.: Printed for the Museum, Juty, 1919. YREREIS Sea 00,culy CAS, BAOIREML O t — ae a A 1 aA : ats eee as sop be ‘y abies bee's Pig —_ ~~ “As ae - * bs ‘ - ‘+ er ae re mar 4 {8 : ne SS oi a ian .7 i a = 2) pi mS ae @ cyat " __ ‘ é ‘ : - a Rs P ; ;* @ ‘2 ‘ nel 4 (al, = e.. tad ; CONTENTS: REPORTS on an Exploration off the West Coasts of Mexico, Central and South America, and off the Galapagos Islands, in charge of ALEXANDER AGassiz, by the U. 5. Fish Commission Steamer “ Albatross,’ during 1891, Lieut. Commander Z. L. TANNER, U.S. N., Commanding. XXXVIII. Reports on the Scientific Results of the Expedi- tion to the Tropical Pacific, in charge of ALEXANDER Acassiz, by the U. S. Fish Com- mission Steamer “ Albatross,” from August, 1899, to March, 1900, Commander JEFFER- son F. Moser, U. S. N., Commanding. XX. Reports on the Scientific Results of the Expedition to the Eastern Tropical Pacific, in charge of ALEXANDER AGassiZ, by the U. S. Fish Commission Steamer “ Albatross,” from October, 1904, to March, 1905, Lieut.-Commander L. M. Garrett, U. S. N., Commanding. XXXI. THe ANNELIDA PorycuarTa. By Raupn V. CHAMBERLIN. 514 pp. 80 plates. July, 1919. << EXPLANATION OF THE PLATES. PLATE 1. Harmothoe mexicana CHAMBERLIN. Figures 1-9. 1.— Anterior end, dorsal view (style of median tentacle broken off; tentacular cirri in outline). 27. 2.— Twenty second right parapodium, caudal view. X 18. 3.— First elytron. X 21. 4.— Small portion of same elytron. X 187. 5.— Neuropodial seta, commonform. 108. 6.— Neuropodial seta, second form. X 108. 7.— Small portion of neuropodial seta, common form, viewed from edge. X 1073. 8.— The same, viewed from side. > 1073. 9.— Notopodial seta, distal portion, side view. X 63. Mem. Mus. Comp. Zodl. “Albatross” Polychaeta, Plate 1. PLATE 2. Harmothoe mexicana CHAMBERLIN. Figure 1. 1.— Neuropodial seta of most ventral row. > 412. Harmothoe hirsuta JoHNnson. Figures 2-8. 2.— Prostomium, dorsal view (right palpus and style of median tentacle missing). Setae of peri- stomial parapodium shown on left side. > 64. 3.— Portion of a dorsal cirrus proximad of middle, in outline. X 281. 4.— Notopodial seta, ordinary form. > 435. 5.— Notopodial seta, stouter intermediate form. X 435. 5 6.— Notopodial seta, short form. X 435. 7.— Neuropodial seta, longer form, distal portion. 435. 8.— Neuropodial seta, shorter form, distal portion. 435. Mem. Mus. Comp. Zoél. ‘Albatross “ Polychaeta, Plate 2. ~ PLATE 3. Harmothoe hirsuta JoHNSON. Figure 1. 1.— Small portion from middle of notopodial seta. X 1073. Eunoe eura CHAMBERLIN. Figures 2-6. 2.— Anterior end, dorsal view. X 17. 3.— Cilia of a dorsal cirrus. X 280. 4.— Distal half of neuropodial seta. X 93. 5.— Tip of neuropodial seta of thirteenth somite. 1050. 6.— Tip of notopodial seta of thirteenth somite. 1050. Mem. Mus. Comp. Zool. ‘Albatross ” Polychaeta, Plate 3. tr Meld deaa dl y tT WANT Hi AAs wen et hy ia | ii +H 1 edd | lit ahh raya 3 epee” TNE TTA call . wt Mh i ai iat ‘1 PLATE 4. Lepidonotus nesophilus CHAMBERLIN. Figures 1-7. 1.— Anterior end, dorsal view (first right palpus and first setigerous parapodium and left parapodium of peristomium omitted). X 30. 2.— First elytron. X 20. 3.— Left tenth elytron. X 20. 4.— Large tubercle of first elytron. X 298. 5.— Smaller tubercles of first elytron. X 298. 6.— Rod from margin of elytronI. XX 1232. 7.— Part of principal notopodial seta toward tip. XX 1232. Mem. Mus. Comp. Zodl. “Albatross” Polychaeta, Plate 4. Ye PLATE 5. Lepidonotus nesophilus CHAMBERLIN. Figures 1-3. 1.— Notopodial seta from anterior region. XX 278. 2.— Neuropodial seta from anterior region. X 278. 3.— Neuropodial seta from posterior region. X 278. Lepidasthenia curta CHAMBERLIN. Figures 4-9. 4.— Anterior end, dorsal view. X 27. 5.— First elytron. X 27. 6.— Elytron from near forty sixth somite. X 27. 7.— Slender neuropodial seta, distal end, from fourteenth somite. X 284. 8.— Neuropodial seta, typical form, from twenty first somite. XX 284. 9.— Neuropodial seta, intermediate form, from fourteenth somite. XX 284. ” Polychaeta, Plate 5. “Albatross Mem. Mus. Comp. Zodl. Here PLATE 6. Harmopsides natans CuamMBeRLin. Figures 1-5. 1.— Anterior end, dorsal view. X 27. 2.— Proboscis, ventral view (Paratype, Sta. 4675). 3.— Dorsal neuropodial seta, distal portion. X 281. 4.— Dorsal neuropodial seta, intermediate form, distal portion. 5.— Ventral neuropodial seta, distal portion. > 281. X 27. X 281. Podarmus ploa CHAMBERLIN. Figure 6. 6.— Distal portion or head of dorsal neuropodial seta. > 1087. oi “Albatross” Polychaeta, Plate 6. Mem. Mus. Comp. Zodl. PLATE 7. Podarmus ploa CHAMBERLIN. Figures 1, 2. 1.— Ventral neuropodial seta, tip, side view. X 1075. 2.— The same, viewed from edge. X 1075. Plotolepis nans CHAMBERLIN. Figures 3, 4, 3.— Anterior region, dorsal view (all elytra and the notocirri of the sixth somite missing; setae of some of parapodia not shown). X 45. 4.— Ventral seta, distal portion. 407. Mem. Mus. Comp. Zodl. “Albatross” Polychaeta, Plate 7. PLATE 8. Polynoe innatans CHAMBERLIN. Figures 1-7. 1.— Anterior notopodial seta, free portion. X 430. 2.— Notopodial seta, intermediate type, from eighth somite, distal portion. X 430. 3.— Portion of notopodial seta of intermediate type from the eighth somite, viewed more from the convex pectinated edge. X 1075. 4.— Portion of notopodial seta of third type from eighth somite. X 1075. 5.— Shorter form of neuropodial seta, distal portion, from seventh somite. X 430. 6.— Larger form of neuropodial seta from sixth somite, distal portion. > 430. 7.— The same viewed from the edge. X 430. Polynoe nesiotes CHAMBERLIN. Figure 8. 8.— Neuropodial seta. > 430. Mem. Mus. Comp. Zo6l. ‘Albatross Polychaeta, Plate 8. iy A \ i wn HELIOTYPE CO. BOSTON PLATE 9. Polynoe nesiotes CHAMBERLIN. Figures 1-5. 1.— Proximal part of pectinate division of a ventral seta. X 1075. 2.— The two most distal pectinae of the same seta. > 1075. 3.— Elytron from middle region of body. X 27. 4.— First elytron. X 27. 5.— Second elytron. X 27. Admetella hastigerens CuamBeR.in. Figures 6-8. 6.— Prostomium and appendages, dorsal view (tentacles broken off). X 16. 7.— Neuropodial seta, exposed portion, viewed from side. X 104. 8.— The same, viewed from edge. X 104. Polychaeta, Plate 9. “Albatross HELIOTYPE CO. BOSTON PrP. © Mem. Mus. Comp. Zodl. 5 oF. a ~ vin a 4 Ser why 4 7 = a 5 5 a « Ps ' 5 a » 4 ‘ . . ‘ ~~ . \ = F A ‘ t / j ‘ PLATE 10 PLATE 10. Admetella dolichopus CHAMBERLIN. Figure 1. i.— Prostomium and appendages (median tentacle broken off). X 16. Pontogenia curva CHAMBERLIN. Figures 2-7. 2.— Eighth right parapodium, caudal view. X 63. 3.— One of the smaller notopodial setae. X 63. 4.— Tip of coarser ventral seta. X 281. 5.— Exposed portion of slender type of anterior parapodium. X 63. 6.— Distal portion of fine ventral seta of anterior parapodium. X 281. 7.— Smaller seta of ventral fascicle of anterior parapodium. X 281. “Albatross” Polychaeta, Plate 10. Lae FSS Fits rgae2sg PLATE 11. PLATE 11. Pontogenia curva CHAMBERLIN. Figures 1, 2. 1.— Distal end of more slender ventral seta from middle region of body. X 281. 2.— Beginning of serrate portion of fine bristle of anterior region showing teeth. XX 1075. Laetmonice wyvillei McIntosh. Figure 3. 3.— Distal end of dorsal seta showing supplementary teeth below main series (Sta. 4675). XX 189. Panthalis panamensis CHAMBERLIN. Figures 4-8. 4.— Anterior end, dorsal view, showing protruded proboscis (left elytra in outline; first two right elytra removed). X 18. 5.— Tip of ventral seta of second setigerous somite. X 415. 6.— Distal end of median seta, second setigerous somite. XX 281. 7.— Distal end of dorsal seta, extreme apex broken of. X 1036. 8.— Distal end of finer dorsal seta. X 1036. “Albatross” Polychaeta, Plate 11. Mem. Mus. Comp. Zo6l. . ‘ ‘ ‘ | , . 5 We ; | ‘ i fs ; wr” 55 ’ s = . P - 2 ; > a * ; od > ; Le = . PLATE 12. Panthalis panamensis CHAMBERLIN. Figures 1-6. 1.— Median seta, distal end, first setigerous parapodium. X 530. 2.— Ventral seta, distal end. 500. 3.— Small of median series. X 326. 4— Ordinary type of seta of median series (filament missing). X 31. 5.— Elytron from near thirtieth somite. X 31. 6.— First right elytron. Euphrosyne panamica CHAMBERLIN. Figures 7, 8. 7.— Dorsal seta, second type. X 326. 8.— Tip of larger form of ventral seta. X 326. Mem. Mus. Comp. Zool. “Albatross Polychaeta, Plate 12. Se a) HELIOTYPE CO. BOSTON ee PLATE 13. Euphrosyne panamica CHAMBERLIN. Figures 1-7. 1.— Dorsal clavate seta, distal end, showing the lower lobe in frontal view seen by transmitted light, the other lobe in dotted outline. X 1022. 2.— Dorsal clavate seta, distal end, viewed from cleft edge. XX 1022. 3.— Dorsal seta, distal end. 277. 4.— Smaller dorsal seta. XX 277. 5.— A ventral seta. XX 277. 6.— A small ventral seta, distal end. 277. 7.— A branchia from posterior region. X 62. Chloeia entypa CHAMBERLIN. Figures 8, 9. 8.— Distal end of dorsal seta of anterior region of body. X 277. 9.— Distal end of ventral seta of middle region. X 277. “‘Albatross ” Polychaeta, Plate 13. Mem. Mus. Comp. Zodl. PLATE 14. Chloeia entypa CHAMBERLIN. Figures 1, 2. 1.— Serrulate dorsal seta, distal part, from middle region of body. X 281. 2.— Non-serrulate dorsal seta from same fascicle as preceding, view not completely from side. Eurythoe complanata (PaALias). Figures 3-9. 3.— Tip of ventral seta from large specimen from the Galapagos Islands. X 281. 4.— Same, from a second, smaller, specimen from the Galapagos Islands. X 281. 5.— Same, from specimen from the Tortugas. X 281. 6.— Same, from specimen from Fakarava. X 281. 7.— Same, from second specimen from Fakarava. X 281. 8.— Same, from young specimen from Papeete. XX 281. 9.— Same, from specimen from Master Island. X 281. X 281. “Albatross” Polychaeta, Plate 14. “Mem. Mus. Comp. Zodl. ———————_ ¢ al - S = 4 . ae : 4 a <<. ies t is '} > =, “ Ss , . > ® rs) ra Ry ‘ * u ee a = a \ ' sab tee ¥ 3 | : Sig . want | a ee 7 ba - ,*% id at , "s fe >a wet i s bs 7 a .25 “se 7 : = - 1 ve =. VF + 5 s _ as og! PLATE 16. PLATE 165. Nepthys ectopa CHAMBERLIN. Figures 1-7. 1.— Anterior region, dorsal view. X 13.5. 2.— Proboscis, distal view. X 13.5. 3.— Right thirty eighth parapodium, anterior view. X 63. 4.— Finer anterior neuropodial seta, exposed portion. > 40S. 5.— Principal type of neuropodial seta, smaller form. X 408. 6.— Principal type of neuropodial seta, common form. X 408. 7.— Notopodial aciculum, distal portion. X 408. Anaitides compsa CHAMBERLIN. . Figures 8, 9. 8.— Distal end of seta. X 281. 9.— Second setigerous parapodium. 18. Mem. Mus. Comp. Zodl. “Albatross” Polychaeta, Plate 15. PLATE 16. Anaitides compsa CHAMBERLIN. Figures 1-6. 1.— Second setigerous parapodium, notocirrus separate. X 18. 2.— Fourth setigerous parapodium. X 18. 3.— Eleventh setigerous parapodium, anterior view. X 18. 4.— Fortieth setigerous parapodium, caudal view. X 18. 5.— Parapodium from middle region of body. X 18. 6.— Parapodium about thirty somites from caudalend. X 18. Phyllodoce fakaravana CHAMBERLIN. Figures 7-12. 7.— Prostomium, dorsal view. X 27. 8.— Style of notocirrus of second setigerous parapodium. X 27. 9.— Third setigerous parapodium, caudal view. X 27. 10.— Parapodium from posterior middle region. X 27. 11.— Parapodium from about seventieth somite, anterior view. 27. 12.— Seta, distal portion. X 429. Mem. Mus. Comp. Zodl. ‘Albatross ” Polychaeta, Plate 16. PLATE 17. Lopadorrhynchus nans CHAMBERLIN. Figures 1-5. 1.— Parapodium from middle region. X 45. 2.— Compound seta, distal end, from middle region of body. X 281. 3.— Simple ventral seta, tip, from middle region of body. 281. 4.— Distal end of shaft of compound seta, viewed from edge, from middle region of body. X 1110. 5.— Side view of the same. X 1110. Lopadorrhynchus parvum CHAMBERLIN. Figures 6, 7. 6.— Seventh left parapodium. X 63. 7,— Compound seta, seventh parapodium. X 281. Mastigethus errans CHAMBERLIN. Figures 8, 9. 8.— Anterior region, dorsal view. X 27. 9.— Proboscis, ventral view. X 27. Mem. Mus. Comp. Zodl. “Albatross” Polychaeta, Plate 17. 4 _ | . _ | . 1 ? J : Rete atoms ) ELATEe. | hat efi , ; ah i PLATE 18. Mastigethus errans CHAMBERLIN. Figures 1-6. 1.— Parapodium of middle region, caudal view. X 45. 2.— Distal end and socket of compound seta, side view. X 1110. 3.— The same, frontal view. X 1110. 4.— Simple ventral seta, distal end, from middle region of body. X 281. 5.— Distal end of compound seta. X 281. 6.— Aciculum, distal and proximal ends. X 281. Nans simplex CHAMBERLIN. Figures 7, 8. 7.— Distal portion of ventral seta, larger form, from middle region of body. 8.— The same, smaller form of same parapodium. X 1075. x 1075. “Albatross "’ Polychaeta, Plate 18, Mem. Mus. Comp. Zodl. PLATE 19. Nans simplex Cuamprr.in. Figures 1-4. 1.— Anterior region, dorsal view (upper tentacular cirri and lower tentacles missing). X 64. 2.— Posterior region, dorsal view (most of the cirri missing). X 64. 3.— Tip of notopodial aciculum. X 1075. 4,.— Distal portion of notopodial seta, view of broader surface. XX 1075. Autolytus torquens CHAMBERLIN. Figures 5-7. 5.— Anterior parapodium. X 64. 6.— Parapodium from middle region of body. X 64. 7.— Composite seta from anterior parapodium. X 1637. Autolytus obliquatus CHAMBERLIN. Figure 8. 8.— Third setigerous parapodium. > 64. Mem. Mus. Comp. Zodl. “Albatross * Polychaeta, Plate 19. PLATE 20. Autolytus obliquatus CHAMBERLIN (pelagic male). Figures 1-3. 1.— Anterior region, dorsal view. X 63. 2.— Anterior region, ventral view. X 63. 3.—-Compound seta. X 1637. Autolytus planipalpus CHAMBERLIN (pelagic male). Figure 4. 4.— Fourth left parapodium of second division (eighteenth setigerous). X 63. Mem. Mus. Comp. Zo6l. “Albatross” Polychaeta, Plate 20. a i paleo sites ey PLATE 21. Autolytus planipalpus CHamper.in (pelagic male). Figures 1, 2. 1.— Anterior end and appendages. X 63. 2.— Composite setae, middle region of body. X 1637. Odontosyllis atypica CHAMBERLIN. Figures 3, 4. 3.— Compound seta, distalend. 1637. 4.— Parapodium from middle region of body, anterior view. X 63. Syllis remex CHaMBERLIN. Figure 5. 5.— Parapodium from middle region of body, caudal view, with notocirrus broken off. X 27. ‘Albatross’ Polychaeta, Plate 21. Mem. Mus. Comp. Zodl. inn OS PLATE 22. Odontosyllis atypica CHAMBERLIN. Figures 1-3. 1.— Anterior end of body with appendages, dorsal view. X 63. 2.— Lateral view of eyes of male. X 63. 3.— Lateral view of eyes of female. X 63. Syllis remex CHAMBERLIN. Pigures 4-6. 4— Composite seta, distal end. X 1075. 5.— Dorsal seta, distal end, side view. X 1075. 6.— Notopodial aciculum, distal end. 1075. : Hesione genetta GrusBn. Figures 7, 8. 7.— Composite seta, distal end. X 281. 8.— Composite seta, distal end of blade, from sixth parapodium. 1140. Hesione panamica CHAMBERLIN. Figures 9, 10. 9.— Composite seta from eighth parapodium, distalend. X 281. 10.— Tip of same. X 1140. Hesione splendida Savicny. Figures 11, 12. 11.— Composite seta from eighth parapodium, distal end. From Mediterranean Sea. 12.— Tip of same. X 1140. Hesione reticulata MareNzELLER. Figure 13. 13.— Tip of composite seta (enlarged from figure by Marenzeller). 1110. Hesione ehlersi Gravimr. Figure 14. 14.— Tip of composite seta (enlarged from figure by Gravier). X 1050. X 281. Polychaeta, Plate 22. “Albatross” Mem. Mus. Comp. Zo6l. frsspaneelsaep, i) LP 2 C7 a 22ra 550890 D OSPR DOD TD Ww oa WD» 2a, iaagats ‘PLATE 23. PLATE 23. Corynocephalus paumotanus CHAMBERLIN. Figures 1-3. 1.— Anterior end, dorsal view. X 27. 2.— Anterior end, ventral view. X 27. 3.— Parapodium of twentieth somite, anterior view. X 27. Plotohelmis alata CHAMBERLIN. Figures 4-10. 4.— Prostomium, dorsal view. X 27. 5.— Anterior end, ventral view. X 27. 6.— Parapodium from middle region of body. X 63. 7.— Notocirrus of third (or fourth) parapodium. X 63. 8.— Notocirrus of fourth (or fifth) parapodium. X 63. 9.— Notocirrus of sixth parapodium. X 63. 10.— Notocirrus of twelfth parapodium. X 63. ; Mem. Mus. Comp. Zool. “Albatross” Polychaeta, Plate 23. HELIOTYPE CQ. BOSTON PLATE 24. Plotohelmis alata CHAMBERLIN. Figures 1-3. 1.— Notocirrus of eighteenth parapodium. X 63. 2.— Notocirrus from near thirtieth somite. X 63. 3.— Notocirrus of twenty fifth parapodium. X 63. Torea pelagica CHAMBERLIN. Figures 4-9. 4.— Anterior end, ventral view (parapodia not shown). X 27. 5.— Prostomium, dorsal view. X 63. 6.— Distal end of seta of fifteenth parapodium. X 1075. 7.— Notocirrus of fifteenth parapodium. X 63. 8.— Neurocirrus of fifteenth parapodium. X 63. 9.— Neurocirrus of fifth parapodium. X 63. Mauita nans CHAMBERLIN. Figures 10, 11. 10.— Distal portion of aciculum. cir. 307. 11.— Parapodium of fourth somite (first complete one). XX 27. Mem. Mus. Comp. Zodl. “Albatross” Polychaeta, Plate 24. PLATE 25. PLATE 26. Mauita nans CHAMBERLIN. Figures 1-6. 1.— Distal end of seta. 1036. 2.— Anterior end, ventral view (left proboscidial process broken off). 16. 3.— Prostomium, dorsal view. X 16. 4.— Parapodium of eighth somite, anterior view. XX 27. 5.— Fiftieth parapodium, anterior view. % 27. 6.— Highteenth parapodium, anterior view. X 27. Rhynchonerella pycnocera CHAMBERLIN. Figures 7, 8. 7.— Style of second neurocirrus. X 48. 8.— Notocirrus from anterior part of caudal region. X 48. Rhynchonerella parva CHAMBERLIN. Figures 9, 10. 9.— Notocirrus of twenty second parapodium. X 96. 10.— Neurocirrus of twenty second parapodium. X 96. Mem. Mus. Comp. Zoél. “Albatross” Polychaeta, Plate 25. PLATE 26. Rhynchonerella pycnocera CHAMBERLIN. Figures 1-6. 1.— Anterior end, dorsal view. X 20. 2.— Anterior end, ventral view. X 20. 3.— Parapodium, middle region of body. X 48. 4.— Parapodium, caudal region of body. X 48. 5.— Tip of finer seta of first parapodium. 1075. 6.— Distal end of coarser seta of first parapodium. X 1075. Mem. Mus. Comp. Zodl. ‘Albatross’ Polychaeta, Plate 26. PLATE 27. Tompoteris eura CHAMBERLIN. Figures 1, 2. 1.— Caudal end, dorsal view. X cir. 20. 2.— First left parapodium, ventral view. X 63. Tomopteris innatans CHAMBERLIN. Figure 3. 3.— Brain and eyes in outline. Tomopteris idiura CHAMBERLIN. Figures 4-6. 4.— Anterior end, ventral view. X 27. 5.— Tenth parapodium, caudal view. X 63. 6.— Seventeenth parapodium (first caudal), ectocephalic view. X 63. ; Mem. Mus. Comp. Zodl. ‘Albatross Polychaeta, Plate 27. PLATE 28. Synelmis simplex CHAMBERLIN. Figures 1-5. 1.— Anterior end, view from side. X 45. 2— Anal cirri. X 63. 3.— Parapodium from middle region of body. X 96. 4.— Tips of notopodial seta (at the right) and aciculum. % 407. 5.— Distal portion of neuropodial seta. > 1075. Kainonereis alata CHAMBERLIN. Figures 6-9. 6.— Anterior end, lateral view. cir. 52. 7.— Pygidium and anal cirri, ventral view. X 96. 8.— Falcate neuropodial seta of seventh left parapodium, dorsal view. X 1075. 9.— Elytron and cirrus of seventh left parapodium, dorsal view. > 96. Mem. Mus. Comp. Zodl. “Albatross "’ Polychaeta, Plate 28. = E E| ES =| AIT Wii LER LAS PATTY } 1 TEU CH Maan Tim une ed ett] PLATE 29. Kainonereis alata CHAMBERLIN. Figures 1-8. 1.— Fourth left parapodium, anterior view. X 96. 2.— Sixth right parapodium, anterior view. X 96. 3.— Eleventh right parapodium, caudal view. X 96. 4.— Twelfth right parapodium, anterior view. X 96. 5.— Left parapodium from middle region, anterior view. X 96. 6.— Distal portion of notopodial seta from middle region of body. X 1075. 7.— Notopodial seta, sixth parapodium. X 1075. 8.— Anterior end of alimentary canal, in outline, showing caeca. X 96. “Albatross” Polychaeta, Plate 29. Mem. Mus. Comp. Zool. HELIOTYPE CO. BOSTON —- ‘ _ PLATE 30. PLATE 30. Uncinereis subita CHAMBERLIN. Figures 1-4. 1.— Parapodium from middle region of body. X 63. 2.— Distal end of neuropodial seta, ordinary long-bladed form. X 1075. 3.— Neuropodial seta, short-bladed form, from middle region of body. X 1075. 4.— Stout notopodial seta, or crochet, from middle region of body. X 1075. Platynereis polyscalma CHAMBERLIN. Figures 5-8. 5.— Neuropodial seta (heterogomph of first type) from third parapodium of epitokous female. X 1075. 6.— Neuropodial seta (heterogomph of second type) from eighth parapodium of epitokous female, x 1075. 7.— Distal portion of natatory seta from middle region of body. X 278. 8.— Tip of blade of same. X 1075. “Albatross” Polychaeta, Plate 30. Mem. Mus. Comp. Zool. ree eeeal KRESS PeVans SS eae — SSA S —— ——. Nanrnaseseone HTH Loan Lei | UE) ——— PLATE 831. Platynereis polyscalma CHAMBERLIN. Figures 1-10. 1.— Anterior region of epitokous female, ventral view. X 45. 2_— Anterior region of epitokous male, ventral view. 45. 3.— Left maxilla of epitokous female, ventral view. X 45. 4.— Left maxilla of epitokous male, ventral view. X 45. 5.— Seventh parapodium of epitokous male. X 638. 6.— Eighth parapodium of epitokous male. X 63. 7.— Penult parapodium of epitokous male. X 96. 8.— Ultimate parapodium of epitokous male. X 96. 9.— Distal portion or ridged seta from ultimate parapodium (viewed a little obliquely to broad surface). X 1075. : 10.— Distal end of shaft of homogomph notopodial seta of epitokous female. X 1075. Mem. Mus. Comp. Zo6l. “Albatross” Polychaeta, Plate 31. Se el PLATE 32. Platynereis polyscalma CHAMBERLIN. Figures 1, 2. 1.— Parapodium from middle region of epitokous female. X 63. 2.— Parapodium from caudal region of epitokous female. XX 96. Nereis segrex CHAMBERLIN. Figures 3-5. 3.— Parapodium. X 27. 4— Socket and adjoining parts of homogomph seta. 1075. 5.— Distal end of neuropodial heterogomph. X 1075. Nereis leuca CHAMBERLIN. Figures 6-8. 6.— Distal end of faleate neuropodial seta. X 1075. 7— Faleate heterogomph of second type from same preparation as the preceding. 8.— Natatory notopodial seta from parapodium of middle region. 278. x 1075. “Albatross” Polychaeta, Plate 32. Mem. Mus. Comp. Zodl. LZ EMMA NH AA SOON U ULE TERT + PUSGABTAAERLEELE 110 POE WU LET ? TAUPO eT FOL xt! i. a = Seb 4). oma) eats PI Outta THT! CY no ys] : J =e _ PLATE 39. ; -- = : i patna) axpsootonotos aidcustoratt Wh i os a “Zz sh eons A eS ae ok g 2 : = i H . ae iy), BH J “ote Lahinna Sige) Fl nists , ; — — ; tox, : aay ie * sbattinse abated tilaly P) anders it {s--= AN Ea eo 2, shah 1 nbiigon oiroienr pie oR Hal oS : = we 2 HN ‘catia tan Bs AEP Lotion r 7) 3 ' ° 4 iv ~ i - ’ no PLATE 39. Hyalinoecia tecton CHAMBERLIN. Figures 1, 2. 1.— Tips of setae from first parapodium. X 68. 2.— Tip of seta from same, more slender form. X 63. Paronuphis solenotecton CHAMBERLIN. Figures 3-8. 3.— Second left parapodium, caudal view. X 63. 4.— First right parapodium, caudal view. X 63. 5.— Left mandible, ventral view. X 63. 6.— Maxillae I, right blade omitted. X 278. 7.— Limbate seta from posterior region of body. X 429. 8.— Compound seta of first parapodium. X 429. _ - Mem. Mus. Comp. Zodl. “Albatross” Polychaeta, Plate 39. Ez PLATE 40. Paronuphis solenotecton CHAMBERLIN. Figures 1, 2. 1.— Pectinate seta from second parapodium. X 1075. 2.— Crochet from posterior region. X 429. Onuphis proalopus CHAMBERLIN. Figures 3-8. 3.— Prostomium and peristomium and appendages, dorsal view. X 27. 4— Maxillae (left blade of I omitted). X 45. 5.— Labium. X 27. 6.— Tip of aciculum. X 429. 7.— Coarse ventral seta of sixth parapodium. X 429. 8.— Crochet, middle region of body. X 429. We _ Mem. Mus. Comp. Zodl. *Albatross” Polychaeta, Plate 40. oi + ; PLATE 41. PLATE 41. Onuphis proalopus CHAMBERLIN. Figures 1-10. 1.— Compound crochet, fourth parapodium. X 429. 2— Pectinate seta. X 1075. 3.— First parapodium, ectal view. 27. 4.— Fourth parapodium, ectoventral view. X 27. 5.— Seventh right parapodium, subectal view. 27. 6.— Sixth parapodium, ectoyentral view. 27. 7.— First right branchia, with cirrus. X 45. 8.— Sixth left branchia, with cirrus. X 46. 9,— Ninth right branchia with cirrus. X 45. 10.— Twentieth left branchia, with cirrus. 45. Mem. Mus. Comp. Zool. ‘(Albatross ” Polychaeta, Plate 41. PLATE 42. Onuphis crassisetosa CHAMBERLIN. Figures 1-6. 1.— Anterior end, dorsal view. X 27. 2.— Mandibles. X 45. 3.— Maxillae. X 45. 4.— Composite crochet of second parapodium. X 429. 5.— Limbate seta from middle region of body. X 429. 6.— Distal end of aciculum from middle region of body. > 429. ‘Albatross Polychaeta, Plate 42. Mem. Mus. Comp. Zodl. PLATE 43. Onuphis crassisetosa CHAMBERLIN. Figures 1-7. 1.— Pectinate seta from middle region of body. > 1075. 2.— Crochet from middle region of body. X 429. 3.— First parapodium of type. X 45. 4.— Second parapodium, ectal view (paratype), > 45. 5.— Third parapodium of type. X 45. 6.— Fourth parapodium of type. 45. 7.— Fourth branchia, subectal view. X 63. Onuphis nannognathus CuamBerRLin. Figures 8-11. 8.— Maxillae of right side. 27. 9.— Crochet from middle region of body. X 429. 10.— Tip of aciculum, middle region of body. cir. 175. 11.— Pectinate seta, middle region of body. 1075. Mem. Mus. Comp. Zool. ‘Albatross’ Polychaeta, Plate 43. PLATE 44. Onuphis nannognathus CHAMBERLIN. Figures 1-8. 1.— Composite crochet of sixth parapodium. X 429. 2.— Distal end of simple, coarser ventral seta from seventh parapodium. X 429. 3.— Distal portion of simple dorsal seta of seventh parapodium. XX 429. 4.— Twentieth branchia, with notocirrus. X 27. 5.— Branchia, with cirrus, from near the seventieth somite. X 27. 6.— Anterior end, ventral view. X 27. 7.— First right parapodium, ectal view. X 27. 8.— Fifth right parapodium, ectal view. X 27. Mem. Mus. Comp. Zool. “Albatross” Polychaeta, Plate 44. a) PLATE 46. Onuphis lepta CHAMBERLIN. > Figures 1-7. 1.— Anterior end, ventral view (paratype). X 27. 2.— Maxillae. X 45. 3.— Tip of crochet from middle region of body. X 429. 4.— Crochet from second parapodium. X 1075. 5.— Pectinate seta from middle region of body. X 1075. 6.— Distal end of seta from seventh parapodium. XX 429. 7.— Distal end of aciculum from middle region of body. X 1075. “Albatross” Polychaeta, Plate 45. p- Zool. es O s 6 7 mst te ata" ensnrloriod “ eco1tedl A” J60X .qreD .auM an9 PLATE 46. Onuphis nannognathus CHAMBERLIN. Figures 1, 2. 1.— Seventh parapodium, ectal view. X 27. 2.— Ninth parapodium, ectal view. X 27. Onuphis lepta CHamMBERLIN. Figures 3-12. 3.— First left parapodium, ectal view. X 45. 4— Third right parapodium, ectal view. X 45. 5.— Fourth right parapodium, ectal view. X 45. 6.— Fifth right parapodium, ectal view. X 45. 7.— Sixth right parapodium, ectal view. X 45. 8.— Seventh right parapodium, ectal view. 45. 9.— First left branchia, ectodorsal view. XX 63. 10.— Third left branchia, ectodorsal view. X 63. 11.— Seventh right branchia, subdorsal view. X 63. 12.— Twenty third right branchia, dorsal view. X 63. Mem. Mus. Comp. Zodl. “Albatross” Polychaeta, Plate 46. - PLATE 47. > PLATE 47. Onuphis socia CHamMBEeRLin. Figures 1-11. 1— Mandibles. X 27. 2.— Right maxillae (carrier-plate of I complete). X 27. 3.— Tip of compound crochet of first parapodium. X 1075. 4.— Dorsal seta. X 429. 5.— Ordinary crochet, distal end. X 429. 6.— Distal portion of aciculum. X 429. 7.— Second left parapodium, ectal view. 27. 8.— Fourth parapodium, ectal view. X 27. 9.— First branchia with cirrus. X 45. 10.— Second right branchia with cirrus. X 45. 11.— Third branchia with cirrus, dorsal view. X 45. Mem. Mus. Comp. Zodl. ‘Albatross’ Polychaeta, Plate 47. PLATE 48. Onuphis socia CHAMBERLIN. Figures 1-4. 1.— Fifth branchia, dorsal view. X 45. 2.— Eleventh right branchia. X 45. 3.— Thirteenth left branchia, dorsal view. » 45. 4.— Thirty fourth right branchia, sublateral view. X 45. Onuphis pachytmema CHAMBERLIN. Figures 5-11. 5.— First left parapodium, ectal view. X 27. 6.— Second left parapodium, ectal view. X 27. 7.— Fourth parapodium, ectal view. 27. 8.— First right branchia, with notocirrus. X 45. 9.— Third left branchia, with notocirrus. X 45. 10.— Fifth left branchia, with notocirrus. X 45. 11.— Last distinct left branchia of type. X 45. Mem. Mus. Comp. Zodl. “Albatross” Polychaeta, Plate 48, os PLATE 49. Onuphis pachytmema CHAMBERLIN. Figures 1-8. 1.— Seventh left branchia with cirrus, subdorsal view. X 45. 2.— Bighth left branchia with cirrus, subdorsal view. X 45. 3.— Twenty second right branchia with cirrus, ectodorsal view. X 45. 4.— Twenty fifth right branchia, subdorsal view. X 45. 5.— Anterior end, ventral view. X 19. 6.— First and second maxillae. X 27. 7.— Mandibles. X 27. 8.— Distal portion of crochet from middle region of body. X 429. “Albatross” Polychaeta, Plate 49, Mem. Mus. Comp. Zool. - * y a & : ‘ — aa 7 7 ¥ 2 \ i — % a F . 7 4 ‘ » ’ - = fod Pia - ‘ » + 4s s re ¥ ; » nt Pies ‘ e. 4 J aie Oia? BA = a ae « . -_ et) ala wit ee a een Se 5 : : ie Eee vi ts dearest | 20 “os Bia SY ones 5) ts = PLATE 50. ’ Onuphis pachytmema CramBerLin. Figures 1-6. 1.— Distal end of composite crochet from the second parapodium. X 1075. 2.— Tip of coarse ventral seta corresponding to composite crochets of first three parapodia, from fourth parapodium. 1075. 3.— Distal portion of ventral seta from middle region of hody. 429. 4.— Dorsal capillary seta from second parapodium. X 429. 5.— Pectinate seta from middle region of body. X 1075. 6.— Distal portion of aciculum of sixty sixth somite of paratype. > 278. Onuphis litabranchia CuamBERLIN. Figure 7. 7.— Maxillae of left side, dorsal view. X 45. “Albatross ’ Polychaeta, Plate 50. Mem. Mus. Comp. Zodl. PLATE 61. Onuphis litabranchia CHAMBERLIN. Figures 1-10. 1.— Anterior end, ventral view. X 27. 2.— Distal end of aciculum from middle region. > 437. 3.— Distal end of limbate seta from middle region. X 437. 4.— Distal end of pectinate seta from middle region of body. X 1075. 5.— Distal end of crochet from middle region of body. 437. 6.— Distal end of special crochet from second parapodium. XX 1075. 7.— First parapodium, caudoectal view. X 63. 8.— First branchia with notocirrus, subectal view. > 63. 9.— Sixth branchia with notocirrus. X 63. 10.— Thirteenth right branchia with notocirrus and dorsal setae. XX 63. | Mem, Mus. Comp. Zodl. “Albatross” Polychaeta, Plate 51. . v a ae ae eas - re ets a CN ptm yen Bites : PLATE 52. Onuphis litabranchia CHAMBERLIN. Figure 1. 1.— Branchia with cirrus from anterior middle region. X 63. Onuphis cobra CHAMBERLIN. Figures 2-8. 2.— Mandibles, with distal portion of masticatory plates broken off. X 27. 3.— Maxillae. X 27. 4.— Distal end of aciculum from posterior region. 5.— Limbate seta of posterior region, not quite full side view. X 429. 6.— Pectinate seta with corners not inflexed. X 429. 7.— Ordinary crochet from posterior region. X 429. 8.— Special crochet from first parapodium, guard broken off. X 429. Mem. Mus. Comp. Zodl. “Albatross” Polychaeta, Plate 52. AAA YAMA AAD ah, WY AW} tH | | My My \ \'\ WEEP yy \ White x ‘ ' s ' a ‘ a - . -“ t a , . ‘ = ‘ re ‘ . 4 ' . t j 4 Bae) x : A ame ah r PLATE. 53. 7 PLATE 653. Leodice makemoana CHAMBERLIN. Figures 1-11. 1.— Anterior dorsal region, lateral view. X 51. 2— Mandibles, ventral view. X 72. 3.— First maxillae, with left blade incomplete. X 72. 4.— Pectinate seta from caudal region. X 1232. 5.— Distal portion of composite seta from anterior region. X 1232. 6.— Distal end of crochet from posterior region. X 493. 7.— First branchia with notocirrus, ectodorsal view. X 72. 8.— Tenth branchia with notocirrus, ectodorsal view. X 72. 9.— Eighth from last branchia with notocirrus, subanterior view. X 72. 10.— Antepenult branchia and notocirrus, anterior view. X 72. 11.— Last branchia and notocirrus. X 72. Mem. Mus. Comp. Zodl. “Albatross” Polychaeta, Plate 53. PLATE 54. Leodice segregata CHAMBERLIN . Figures 1-5. 1.— Manxillae J and II of left side. X 25. 2.— Pectinate seta. > 1232. 3.— Distal end of crochet of posterior region. X 319. 4.— Branchia of eleventh somite with notocirrus. X 25. 5.— Branchia and notocirrus of second to last branchiferous somite (paratype from Sta. 3417). x 25. Leodice lita CHAMBERLIN. Figures 6-10. 6.— First branchia, with notocirrus of eighteenth somite. X 72. 7.— Third branchia, with notocirrus. X 72. S8.— Fifth branchia, with notocirrus. X 72. 9— Tenth branchia, with notocirrus. % 72. 10.— Twelfth branchia, with notocirrus. X 72. Mem. Mus. Comp. Zodl. “Albatross” Polychaeta, Plate 54. PLATE 565. Leodice lita CHAMBERLIN. Figures 1-7. 1.— Thirty first branchia and notocirrus, subdorsal view. X 72. 2.— Mandibles, ventral view. X 31. 3.— Maxillae I. X 31. 4.— Distal portion of aciculum from middle region showing the common form of apex. 5.— Crochet. XX 298. 6.— Shaft and appendage of composite seta. X 319. 7.— Pectinate seta. XX 1282. Leodice oliga papeetensis CHAMBERLIN. Figures 8-10. 8.— First branchia with notocirrus. X 72. 9.— Sixth branchia with notocirrus, caudal view. X 72. 10.— Nineteenth branchia with notocirrus, anterodorsal view. X 72. Leodice oliga CHAMBERLIN. Figure 11. 11.— Apical portion of crochet. X 493. X 319. Mem. Mus. Comp. Zodl. ‘Albatross’ Polychaeta, Plate 55. \ HELIOTYPE CO. BOSTON — “ve PLATE 56. Leodice oliga papeetensis CHAMBERLIN. Figure 1. 1.— Twenty sixth branchia. X 74. Leodice oliga CuamBeruin. Figures 2-9. 2.— Mandibles, ventral view. 74. 3.— Pectinate seta. X 1261. 4.— Composite seta. X 1261. 5.— First branchia, with notocirrus. X 74. 6.— Second branchia in caudal group, with notocirrus. »X 74. 7.— Fourth branchia, with notocirrus, dorsocaudal view. 74. 8.— Sixth branchia, with notocirrus, subcaudal view. X 74. 9.— Probably eighth branchia, subcaudal view. X 74. Mem. Mus. Comp. Zod. ‘Albatross’ Polychaeta, Plate 56. ic L& ative) a 4 PLATE 657. Leodice contingens CHAMBERLIN. Figures 1-5. 1.— Mazxillae I and II, left side, dorsal view. X 17. 2.—- Right branchia with notocirrus of twenty fourth somite. X 24. 3.— Distal portion of dorsal seta. X 326. 4.— Distal end of crochet from posterior region. X 326. 5.— Composite seta from caudal region. X 326. Leodice nesiotes CHAMBERLIN. Figures 6, 7. 6.— Right mandible, ventral view. X 23. 7.— Composite seta, thirtieth somite. > 298. Leodice pauroneurata CHAMBERLIN. Figures 8, 9. 8.— Pectinate seta. X 1261. 9.— Composite seta. XX 326. Mem. Mus. Comp. Zool. “Albatross” Polychaeta, Plate 57. HELIOTYPE CQ. BOSTON PLATE 658. Leodice pauroneurata CHAMBERLIN. Figures 1-9. 1.— Crochet from posterior region. X 319. 2.— Mandibles. X 26. 3.— Right maxilla I. X 26. 4.— Mazxilla III, dorsal view. X 31. 5.— Paired tentacles of right side, lateral view. X 25. 6.— Tentacular cirrus. X 46. 7.— First left branchia, with notocirrus, caudal view. X 57. 8.— Fourth left branchia, with notocirrus, caudal view. X 57. 9.— Eleventh left branchia, with notocirrus, caudal view. X 57. “Albatross” Polychaeta, Plate 58. Mem. Mus. Comp. Zodl. PLATE 59. Leodice pauroneurata CHAMBERLIN. Figures 1-3. 1.— Thirteenth branchia, with notocirrus, caudal view. 58. 2.— Thirty second branchia, with notocirrus, caudal view. X 58. 3.— Fifty fourth branchia, with notocirrus, caudal view of sixty third somite. Leodice panamena CHAMBERLIN. Figures 4-8. 4.— First right branchia, anterior view. X 46. 5.— Second right branchia, subdorsal view. X 46. 6.— Sixth right branchia, subdorsal view. X 46. 7.— Eleventh right branchia, subdorsal view. X 46. 8.— Sixty first right branchia, subdorsal view. X 46. x 58. Mem. Mus. Comp. Zool. “Albatross” Polychaeta, Plate 59. 7 PLATE 60. Leodice panamena CuamBERLIN. Figures 1-5. 1.— Distal portion of crochet from fifty sixth somite. X 504. 2.— Composite seta from fifty sixth somite. x 1261. 3.— Pectinate seta from fifty sixth somite. > 1261. 4.— Mandibles, ventral view. X 31. 5.— Maxillae I, dorsal view. X 31. Lumbrinereis bifilaris Envrrs. Figures 6-9. 6.— Mandibles, ventral view. 7.— Maxillae II, III, and IV. 8.— Distal end of limbate seta of fifteenth somite. 9.— The same, of another seta of same somite, different view. ‘Albatross Polychaeta, Plate 60. ae” ti ees 1087. PLATE 63. Dorvillea crassa CHAMBERLIN. Figure 1. 1.— Composite seta, distal portion. X 1075. Hemipodus mexicanus CHAMBERLIN. Bipares 2, 3. 2.— Twelfth parapodium, caudal view. X 63. 3.— Composite seta, distal portion. X 1075. Telake epipolasis CHAMBERLIN. Figures 4-8. 4.— Twenty first parapodium. X 63. 5.— Thirty seventh parapodium. X 63. 6.— Distal portion of notopodial seta of twenty first parapodium. 1075. 7.— Tip of neuropodial seta of thirty seventh parapodium. X 1075. 8.— Portion of same seta at proximal end of free part. 1075. Mem. Mus. Comp. Zodl. “Albatross” Polychaeta, Plate 63. HELIOTYPE COQ. BOSTON PLATE 64. Telake epipolasis CHAMBERLIN. Figure 1. 1.— Distal portion of ventral seta of twenty first parapodium. X 811. Glycera profundi Cyampertin. Figures 2-6. 2.— Prostomium. X 26. 3.— Fourth parapodium, caudal view. x 50. 4.— Twentieth parapodium, caudal view. > 50. 5.— Fiftieth parapodium, cephalic yiew. X 50. 6.— One hundredth parapodium, cephalic view. > 50. Branchethus latum CHAMBERLIN. Figures 7-11. 7.— Sixth branchia. X 49. 8.— Tenth branchia. X 49. 9.— Basal portion of thirtieth branchia with all filaments broken off near base, subdorsal view. 10.— Branchia from caudal region. 49. 11.— Branchia from caudal region, a broader form. X 49. x 49. Mem. Mus. Comp. Zool. “Albatross” Polychaeta, Plate 64. a BE HELIOTYPE CO. BOSTON PLATE 665. Branchethus latum CHamBERuin. Figures 1, 2. 1.— Neuropodial seta of anterior parapodium. X 278. 2.— Portion of notopodial seta of anterior parapodium. X 278. Nainereis retusiceps CHAMBERLIN. Figures 3-5. 3.— Tenth parapodium, anterior view. X 63. 4.— Ventral neuropodial seta, tenth parapodium. x 278. 5.— Ordinary neuropodial seta, tenth parapodium. X 278. Plotobia simplex CHamBEr.in. Figures 6-11. 6.— Style of first right notocirrus. 63. 7.— Style of second right notocirrus. > 63. 8.— Style of third right notocirrus. > 63. 9.— Style of fifteenth right notocirrus. 63. 10.— Style of last right notocirrus. X 63. 11.— Style of neurocirrus of about fifteenth setigerous somite. > 63. Polychaeta, Plate 65. “Albatross Mus. Comp. Zool. Mem. PLATE 66. Plotobia simplex CuampBnrruin. Figure 1. 1.— Anterior end seen from above and a littie to the right (styles of left nofocirri, excepting the first one, missing). Plotobia coniceps CHamMBERLin. Figures 2-4. 2.— Anterior end, dorsal view (paratype, Sta. 4661). X 32. 3.— Anterior end, lateral view, styles of cirri missing (type). 32. 4.— Caudal end, dorsal view (paratype). X 32. Mem. Mus. Comp. Zool. “Albatross” Polychaeta, Plate 66, a ; 4 * . ie “ fe : coum ° J I ay? 5 *~PLATE 67. is a 3 ’ ’ PLATE 67. Travisia profundi CHAMBERLIN. Figures Ted 1.— Lateral view. 2.— Anterior end, ventral view. X 32. 3.— Portion of third somite showing first branchia, setae, sensory pit. 4.— Branchia and adjoining structures of eighth somite. X 76. Kesun fusus CHAMBERLIN. Tigure 5. 5.— Portion of fourth somite showing setae, sensory pit, etc. xX 76. X 76. Mem. Mus. Comp. Zodl. “Albatross” Polychaeta, Plate 67. af S » , he . 2 fi - iN t “ = ’ ha i 7 = : ‘ 5 ¢ ¥ Ce ' ye * < “ * f > = a : - Gc ; an ® > @ _ <= = ss he _ ad z = = “ ~~", - e. Ps > a“ & 2 ' 88 GTA Madina woenk seek : 3 it ; > 5 2 . = i e by —..£ of aul 65 > .watv Inithey bee a0heiiA —S ed BEM weber lee os epee PLATE 68. +7 > = WIdBOMeHO seoomttow sper 8-8 gout REX weir Thoay auqlel —, & rie. 4 abitnoe disidosw te anpiboqewam jo alse — b > OT-X siimoew digSysis Jo mmlbogotor 30.98 — 6 WBE me ait pert uo sesd <0 -iiIOR dinsvels to stee Iniboqotovt —) in _Maairaman sigma abea Fete ; +, ey estos ee |S. E 2 7 el ee x et x eoHtome ‘Bhaaaasistt 40 ete > Este: baa PLATE 68. Kesun fusus CHaMBer.in. Figures 1, 2. 1.— Anterior end, ventral view. X 38. 2.— Caudal end, lateral view. X 38. Brada verrucosa CHAMBERLIN. Figures 3-6. 3.— Palpus, ventral view. X 35. 4.— Seta of neuropodium of twentieth somite. 76. 5.— Seta of notopodium of eleventh somite. 76. 6.— Notopodial seta of eleventh somite; a. base, b. toward tip. X 337. Brada irenaia CHAMBERLIN. Figures 7-9. 7.— Notopodial seta of thirteenth somite. X 76. 8.— Portion toward distal end of same seta. > 337. 9.— Portion toward base of same seta. X 337. “Albatross Polychaeta, Plate 68. Mem. Mus. Comp. Zodl. PEten Sa Lis Wis fVEAPOS LRG TESOL ETE SEE NR UNARHEE EG ” » ne - rs , ‘ ' ‘ — v Py - + 4 PLATE 69. Brada irenaia CHAMBERLIN. Figures 1-3. 1.— Neuropodial seta from thirteenth somite. X 76. 2.— Portion from basal region of neuropodial seta of the more common form, sixteenth somite. 3.— Similar portion from neuropodial seta with exceptionally short annul. X 337. Tiyphagus bythincola CuamBer.in. Figures 4-9. 4.— Notopodial seta of eleventh somite. X 76. 5.— Portion of same toward tip. X 337. 6.— Portion of same at base. -X 337. 7.— Neuropodial seta from eleventh somite. X 76. 8.— Portion of same at base. X 337. 9.— Portion of neuropodial seta near middle from tenth somite. X 337. X 337. Polychaeta, Plate 69. “Albatross FAA ONRA UN SiN Ag 846 . - Ssh tana res DRAUEDPSEA LTDA bid DU DAE pnPOA RH ALLY Mem. Mus. Comp. Zodl. PLATE 70. Cirratulus megalus CHAMBERLIN. Figures 1-4. 1.— Anterior end, dorsal view. X 7.5. 2.— Anterior end, ventral view. 7.5. 3.— Two ventral spines and one eapillary seta. X 63. 4.— Portion of capillary seta. X 1036. Cirrineris nesiotes CHAMBERLIN. Figures 5, 6. 5.— Ventral spine. X 278. 6.— Ventral capillary seta. X 278. Cirratulus sinincolens CHAMBERLIN. Figures 7-10. 7.— Neuropodial acicula from posterior region, proximal ends not shown. 8.— Distal portion of single ventral spine of same parapodium. X 278. 9.— Ordinary seta, anterior region. X 278. 10.— Finer dorsal neuropodial seta, posterior region. 278. X 278. Mem. Mus. Comp. Zool. “Albatross ’ Polychaeta, Plate 7o. HELIOTYPE CO. BOSTON PLATE 71. Sonatsa meridionalis CHAMBERLIN. Figures 1-8. 1.— Anterior end, lateral view. X cir. 8.5. 2.— Anterior region, dorsal view. Xcir.8.5. , 3.— Region of fifth, sixth, and seventh somites, lateral view. 4.— Uncinus of eighth somite. X 337. 5.— Distal end of uncinus, or crochet, of third setigerous somite. X 1150. 6.— Distal end of crochet of eighth setigerous somite. 1150. 7.— Beginning of serrate portion of capillary setae from middle region. cir. 1150. 8.— Limbate seta of third setigerous somite. X cir. 1300. “Albatross” Polychaeta, Plate 71. Mem. Mus. Comp. Zodl. if TT as = See 3 hae a om ie PLATE 72. Maldanella fibrillata CHamBer.Lin. Figures 1-6. 1.— Anterior end, lateral view. X cir. 8.5. 2.— Anterior end, subdorsal view. cir. 8.5. 3.— Caudal end, lateral view. 8.5. 4.— Uncinus of third setigerous somite. X 337. 5.— Distal end of uncinus of normal form, third setigerous somite. X_ cir. 1150. 6.— Distal end of uncinus of occasional form, third setigerous somite. X cir. 1150. “Albatross” Polychaeta, Plate 72. Mem. Mus. Comp. Zool. PLATE 73. PLATE 73. Maldanella fibrillata Cuamprer.in. Figures 1, 2. 1.— Distal end of capillary seta of third setigerous somite (fibrillae not shown). 2.— Portion of middle region of same. X 337. Petaloproctus crenatus CHAMBERLIN. Figures 3-7. 3.— Caudal end, lateral view. X 337. 4.— The same, dorsal view. X 337. 5.— Distal portion of major capillary seta of eighth somite. X 337. 6.— Uncinus of eighth somite. 337. 7.— Distal end of same. X cir. 1150. X 337. “Albatross” Polychaeta, Plate 73. s. Comp. Zool. Mem. Mu SSS ZZ ZZ SSS —— SSS ee — ——— ee — == = —— ee —————— ee PLATE 74. Idanthyrsus regalis CHAMBERLIN. Figures 1-8. 1.— Neuropodial seta of second thoracic somite. X 113. 2.— Portion of neuropodial seta toward tip, eighth abdominal somite. 3.— Uncinus in profile. X 1305. 4.— Neuropodial paleae, fourth thoracic somite. X 76. 5.— Notopodial paleae of same somite. X 76. 6.— Inner opercular paleae. X 76. 7.— Typical outer paleae. X 76. 8.— Anterior outer paleae. XX 76. X 1305. i : —— : Sr eR “Wie B Al Fifi] ( / f ( ( ( fa on oe | ie PLATE 76. PLATE 75. Tetreres nesiotes CHAMBERLIN. Figures 1-7. 1.— Uncinus. X 870. 2.— Seta from thirty fifth abdominal somite, with portion more highly enlarged. 3.— Inner opercular paleae from near anterior end of series. X 51. 4.— Three outer paleae from near caudal end of series. XX 51. 5.— Notopodial paleae from last thoracic somite. > 75. 6.— Neuropodial paleae from second thoracie somite. X 75. 7.— Nuchal hook, with adjacent papilla, in outline. .X 51. Idanthyrsus cretus CHAMBERLIN. Figures 8-15. 8.— Notopodial seta, first abdominal somite. X 396. 9.— Simple seta from notopodium of second pale-bearing somite. > 78. 10.— Uncinus from middle region of body. 870. 11.— Five of the inner opercular paleae. X 78. 12.— One of the shorter outer paleae. X 78. 13.— Three dorsal thoracic paleae in different aspects from the second pale-bearing somite. 14.— Dorsal thoracic palea from second pale-bearing somite, surface view. XX 78. 15.— Ventral thoracic palea, first pale-bearing somite. X 78. Xx 78. Mem. Mus. Comp. Zod]. ‘Albatross’ Polychaeta, Plate 75. Aili : HELIOTYPE CO. BOSTON PLATE 76. Amphicteis obscurior CHAMBERLIN. Figures 1, 2. 1.— Anterior region, dorsal view. 2.— Same, ventral view. Amphicteis orphnius CHAMBERLIN. Figures 3, 4. 3.— Anterior region, dorsal view. 4.— The same, ventral view. Amphicteis uncopalea CHAMBERLIN. Figures 5, 6. 5.— Anterior region, dorsal view. 6.— Same, ventral view. Paiwa abyssi CHAMBERLIN. Figures 7-9. 7.— Anterior region, ventral view. 8.— Branchia. X 11. 9.— Parapodium from median region of abdomen. X 34. Mem. Mus. Comp. Zodl. “Albatross” Polychaeta, Plate 76. HELIOTYPE CO. BOSTON PLATE 77. Amphicteis orphnius CHAMBERLIN. Figures 1, 2. 1.— Two of the shorter paleae from above. X 67. 2.— Uncinus, seventeenth setigerous somite. X 930. Amphicteis obscurior CHAMBERLIN. Figure 3. 3—Uncinus. XX 930. Amphicteis uncopalea CHAMBEELIN. Figure 4. 4.—- Uncinus from twelfth somite. 930. . Pabits deroderus CHAMBERLIN. Figures 5, 6. 5— Abdominal uncinus, profile view. X 1075. 6— Distal end of thoracic seta. X 278. Ampharete homa CHAMBERLIN. Figures 7, 8. 7.— Abdominal uncinus. X 1075. 8.— Distal end of notopodial thoracic seta. 278. Paiwa abyssi CHAMBERLIN. Figures 9, 10. 9.— Ninth parapodium, ventrolateral view. X 25. 10.— Uncinus, profile view. > 1075. Moyanus explorans CHAMBERLIN. Figures 11, 12. 11.— Thoracie uncinus, profile view. > 1075. 12.— Distal portion of thoracic seta. > 278. Sabellides delus CHAmMbERLiN. Figure 13. 13.— Uncinus from eleventh setigerous somite. X 1075. Mem. Mus. Comp. Zodl. “Albatross” Polychaeta, Plate 77. HELIOTYPE CQ. BOSTON PLATE 78. Paumotella takemoana CHAMBERLIN. Figures 1-5. 1.— Dorsal abdominal seta from caudal region. X 260. 2.— Setae of sixth thoracic somite, distal ends. > 278. 3.— Abdominal uncinus. X 1036. 4.— Dorsal abdominal seta, median region of abdomen. X 260. 5.— Portion of branchia in optical section. > 58. Pomatcceros paumotanus CHAMBERLIN. Figures 6-9. 6.— Portion of thoracic seta, tip broken off. > 278. 7.— Thoracic uneinus. X 1036. 8.— Lateral view of operculum. 15. 9.— Tip of a branchia. X 63. Sternaspis maior CHAMBERLIN. Figure 10. 10.— Ventral shield. X 3.75. ‘Albatross ” Polychaeta, Plate 7S. Mem. Mus. Comp. Zodl. AA — , + APN oN EN = "ny ( F gers , — ; >. 4+ J (| Oye \ NaS i PLATE 79. Eupolymnia regnans CHAMBERLIN. Figures 1-3. 1.— Thoracic seta. X 225. 2— Thoracic uncinus. X 830. 3.— Abdominal uncinus. X 830. Eupolymnia insulana CHAMBERLIN. Figures 4-6. 4.— Thoracic seta. XX 225. 5.— Thoracie uncinus. 860. 6.— Abdominal uncinus. X 860. Terebella panamena CHAMBERLIN. Figures 7, 8. 7.—- Distal portion of thoracic seta. XX 830. 8.— Thoracic uncinus. X 830. Nicolea profundi CHAMBERLIN. Figure 9. 9— Thoracic uncinus. 830. Nicolea latens CHAMBERLIN. Figures 10, 11. 10.— Notopodial seta, distal portion. X 225. 11.— Abdominal uncinus. X 860. Nicolea taboguillae CHAMBERLIN. Figures 12, 13. 12.— Outline of right lateral flap of third somite. X 20. 13.— Thoracic uncinus, profile view. X 830. Mem. Mus, Comp. Zodl. “Albatross” Polychaeta, Plate 79. PLATE 80. Nicolea galapagensis CHAMBERLIN. Figures 1-3. 1.— Caudal end, dorsal view. X 20. 2.— Outline of right lateral flap of third somite. > 20. 3.— Thoracic uncinus. XX 860. Thelepus pericensis CHAMBERLIN. Figures 4-6. 4.— Anterior seta, distal portion. X 225. 5.— Anterior uncinus, frontal view. X 860. 6.— The same, profile. 860. Terebellides eurystethus CHAMBERLIN. Figures 7-15. 7.— Pinnula of anterior abdominal region. X 51. 8.— Pinnula of posterior abdominal region. X 51. 9.— Fourteenth left notopodium, anterior view. X 22. 10.— Seta of tenth thoracic somite, extreme tip missing. X 225. 11.— Thoracic uncinus. X 860. 12.— Abdominal uncinus, profile view. 860. 13.— Abdominal uncinus, frontal view. X 860. 14.— Another abdominal uncinus. X 860. 15.— Crown of teeth of uncinus viewed nearly from direction of points of teeth. X 860. Polychaeta, Plate So, ‘*Albatross ” Mus. Comp. Zool. Mem. HELIOTYPE CO. BOSTON PUBLICATIONS oe Jue ie OF THE — MUSEUM OF COMPARATIVE ZOOLOGY AT HARVARD COLLEGE. There have been published of the Botner Vols. I. to Liv., ef Vols. LVI., and LVIII. to LXII.; of he Menorrs, Vols. ee to XXXVIIL., and also Vols. XL. to XLII., XLIV. to XLVI. ‘ond a NUVI eh eae | Paraben) teas ats LV., LVIL, and LXIIL., of he BULLETIN, — and Hoi XXXIX., XLUL, XLVI, and XLIX. of the eu 2 are now in ashe ae “ Y course of publication. é A price list of the publications of the Musewm will be sent on n applix ‘ cation to the Director of the Museum of i ie Zola, Cambria, ef Mass. » De io Te a ‘te , 4h - ’ ‘ne i ae ted’ igh ie ADA va if 3 ete i : a Pabst | oe j ‘at uae t i " 7 ‘ j ! ' 4 rh {0 hy i y4 } wn nn Rare Sales ialic npg op meninnrerin es cemnrnnn rs peas NEES reat onan hereerermen ne poet at nents ye A NL - ee