ie t of nee te 1 y Poi ia all «< http://www.a US nee 4 ~~ 5 rrr" FF SMITHSONIAN INSTITUTION HARRIMAN ALASKA SERIES VOLUME X CRUSTACEANS BY MARY J. RATHBUN, HARRIET RICHARDSON, S. J. HOLMES, and LEON J. COLE CITY OF WASHINGTON PUBLISHED BY THE SMITHSONIAN INSTITUTION 1910 “—~ | 115 3" V-10 ADVERTISEMENT. The publication of the series of volumes on the Harriman Alaska Expedition of 1899, heretofore pri- vately printed, has been transferred to the Smithsonian Institution by Mrs. Edward H. Harriman, and the work will hereafter be known as the Harriman Alaska Series of the Smithsonian Institution. The remainder of the edition of Volumes I to V, and VIII to XIII, as also Volumes VI and VII in preparation, together with any additional volumes that may hereafter appear, will bear special Smithsonian title pages. SMITHSONIAN INSTITUTION, WASHINGTON, D.C., Juty, 1910 HARRIMAN ALASKA EXPEDITION WITH COOPERATION OF WASHINGTON ACADEMY OF SCIENCES ALASKA. VOLUME X CRUSTACEANS BY MARY J. RATHBUN, HARRIET RICHARDSON, S. J. HOLMES, AND LEON J. COLE NEW YORK DOUBLEDAY, PAGE & COMPANY 4904 (x . 2 “A 2 CONTENTS : PAGE NN se Ca 4 ae pale Seal ala OUK Woke Oe oe Padets ba ix Decapod Crustaceans of the Northwest Coast of North presets, MARY J. RATHBUN: oo ilcs cod cu ceeda ix I Isopod Crustaceans of the Northwest Coast of North Amer- See FARRRIET RICHARDSON (256s bas eee ca bees 211 Amphipod Crustaceans of the Expedition. S.J. HOLMES. 231 Pycnogonida of the West Coast of North America. LEON v fh hye Rar ~ Ts hs Peas ' one GSE ILLUSTRATIONS PLATES FACING PAGES RAM OMADOOS 5 ands arse oe ea sebe sete Maa eS 192-210 MY A. PYCHOVONIGS. «osc ccc kas base ee ee sevens 300—330 TEXT FIGURES EE OCRIMIN S56 6a po nen aca Re ESHER RRA Ree ee 19-188 ER 6 nt Oe oso bce 6 ue wk RK OL OM RSE 215-228 DUPER E EMP RINOS oo ss ces ee cca ee cc icedeeens Ye 00 + 234-246 PREFACE Crustaceans were collected by several members of the Harriman Expedition, particularly by Professor Trevor Kincaid, Professor W. B. Ritter, and Dr. Wesley R. Coe. After the return of the Expedition these specimens were arranged by groups and sent to specialists for study. The Decapods have been elaborated by Miss Mary J. Rathbun, who has included in her investigation the exten- sive collections from the Pacific coast already in the United States National Museum, so that her paper may be regarded as a comprehensive revision of the group for the west coast of North America from California to Arctic Alaska. The Isopods have been treated by Miss Harriet Richardson, the Amphipods by Dr. S. J. Holmes, the Pycnogonids by Dr. Leon J. Cole. The chapter headings are from the facile pens of Mrs. Louise M. Keeler and Mr. F. A. Walpole—the Amphipods by Mr. Walpole, the others by Mrs. Keeler. C, Hart MeErrtay, Editor. WASHINGTON, D. C., May I, 1903 DECAPOD CRUSTACEANS OF THE NORTHWEST COAST OF NORTH AMERICA GIS IG, v9.2 AER iss ete ee ete area, : DECAPOD CRUSTACEANS OF THE NORTHWEST COAST OF NORTH AMERICA BY MARY J. RATHBUN CONTENTS. BOC gon oc nc cecces 6 ERWe sce jute chub beetese ee ereey 3 NCSC REIOR: 5 5's. :0:50 6 vin EMME 0 Wb ede Moles beds ha weaw.ey 4 RUEER HIM: ATISCEIUUION 5 o:5.4 6 5'e a cee 650 Bie cine Me ee Dae. e.6 sek 6 Distribution table..... EE re ee LEE TURE ET ET eee 8 munatic Giscussion Of Species 6 ..d gsc cascescvesecepescecearce 19 INTRODUCTION. THIS report includes primarily the crabs and shrimps collected by the Harriman Expedition. In order to name the shrimps it became necessary to overhaul the large collection of undeter- mined material of that group which has accumulated in the U. S. National Museum. This was derived from several years’ work of the Albatross, and from the investigations of Dr. W. H. Dall and others, and embraces the entire coast from Arctic Alaska to southern California. The results of this study are given below, short descriptions of the new species having already been published in the Proceedings of the National Museum (XXIV, pp. 885-905, May, 1902). More than that, the accompanying list of species is designed to serve as a check-list of the Decapoda’ known to in- habit the region indicated, together with their distribution. The collection in the National Museum affords exceptional 1The Anomura of the Museum collection, here listed, have been determined by Dr. J. E. Benedict. The Alpheidz are to be reported upon by Dr. H. Coutiére of the Mu- seum at Paris; therefore the data given herein are quoted largely from Dr. Holmes. (3) 4 RATHBUN opportunities for studying the Pacific fauna, as the material is in some cases remarkably abundant. So rich in crabs and shrimps were some parts of the sea bottom explored by the A/batross that only a portion of each dredge haul was preserved for study, many a ‘peck’ or ‘quart’ of these animals being thrown over- board by the ship’s naturalists. Our knowledge of the Decapod fauna of the Northwest is, for the most part, of recent growth. More than two fifths of the species enumerated below have been described within the last twelve years, while during that time our acquaintance with the species known to Brandt, Stimpson, Lockington, and other pio- neers in this field has been greatly extended. In 1900 Dr. S. J. Holmes published a very useful ‘Synopsis of California Stalk-Eyed Crustacea,’* with descriptions of genera and species, and it has been thought unnecessary to repeat cita- tions for the species which he gives. An effort has been made to figure all the little-known species. In addition to the general collection of Decapods made by Dr. William E. Ritter of the Harriman Expedition, those obtained by Dr. W. R. Coe and Professor Trevor Kincaid have been placed at my service. One new species, a Beteus, is notable as the first Alpheid reported from as high a latitude as Sitka. A remarkable case of dimorphism is here recorded for the first time: the cosmopolitan species Processa canaliculata Leach, more commonly known by the later name Vika edulis Risso, is found to possess in certain cases two chelate feet of the first pair instead of the characteristic asymmetrical disposition of a chelate foot on one side and a simple one on the other. General features.—The Decapod fauna of the North Pacific is rich in individuals, if not in species or in variations of form. In the mass of material examined (about 50,000 specimens) certain types were found to be largely in excess, namely, the Pan- dalid, Hippolytid, and Crangonid shrimps, the Pagurids or hermit- crabs, the Maioids or true spider-crabs, and the Lithodids or Anomuran spider-crabs. In point of numbers the Pandalids take the lead. The most 1Occas. Papers Calif. Acad. Sci., vil, pp. 1-262, pls. I-IV, 1900. DECAPODS 5 abundant species are Pandalus borealis and P. montagui, both boreal forms which descend from the Arctic regions into the At- lantic as well as the Pacific, but in the latter find conditions most favorable to their increase. The form of P. montagui inhabiting the Pacific exhibits modifications which entitle it to recognition as a distinct subspecies. In number of species the genus Sfivontocaris of the family Hippolytide is unsurpassed. Like Pandalus, it is primarily a boreal genus, and is common to the Atlantic and the Pacific. In the Pacific it is represented by 51 species, exhibiting great diver- sity inform. Several are identical with Atlantic species. Quite as conspicuous in the North Pacific fauna are the Cran- gonidz. These occur in great numbers, and exhibit 32 different forms, for the most part restricted to the Pacific. The Paguridz, or hermit-crabs, occur in vast numbers, and some of the species appear to have local centers of distribution. Each of these species attains its maximum development, both as to size and numbers, in a particular area, while elsewhere it is stunted and infrequent. Several of the spider-crabs (Maiidz) abound in shallow as well as in deeper water, and Oregonia, Chorilia, the two Chionecetes, and the two species of Hyas form no inconsiderable part of every haul of the dredge. Less abundant are the Lithodidez or Anomuran spider-crabs, which include the giant Decapods of the region. The crowding of crustacean life in certain localities is especially favorable to parasitism. Bopyrids (of a few species only) are of frequent occurrence on many species of shrimps'; Rhizocephalids are less common, while worm parasites have been noticed in sev- eral instances embedded underneath the carapace of Spirontocaris. The Decapods contribute without doubt a large proportion of the food of fishes, several species having been taken from their stomachs; but our knowledge on this subject is very fragmentary. Many species are caught for the market, to be used for the table or for bait. The list of these furnished in ‘The Fisheries and Fishery Industries of the United States,’ Washington, 1884, 1Miss Harriet Richardson will publish a report on the Bopyridz of the Museum collection in the Proceedings of the U. S. National Museum during the next year. 6 RATHBUN is the only one so far published, but it is necessarily incom- plete. Geographic distribution.—The following points are brought out in the accompanying table of distribution: That Arctic species often continue southward through Bering Strait along the west coast of Bering Sea to Okhotsk Sea and the Kurile Islands. That some of these species may also stretch along the Alaska shores southward, occasionally to Puget Sound or even farther south. That the winter line of floating ice in Bering Sea determines | the northern limit of many species. This line extends approxi- mately from the neighborhood of Nunivak Island westward just north of the Pribilof and Commander Islands to the Kamchatkan shore. While many species range continuously from this line south- ward to California, others indicate a division of that stretch of coast-line into several faunz. So far as the Crustacea are con- cerned, the vicinity of Kadiak appears to be a boundary between subregions. Aleutian species, however, are often found out of their normal region, in the cold glacier-fed bays and sounds of southeastern Alaska. The Straits of Fuca and Puget Sound also form a partial boun- dary between species, partial because, while nineteen species have Puget Sound for a southern limit, and nine species find here their northern limit, seventy others run uninterruptedly north and south of this point. The vicinity of Monterey Bay, California, is a more striking barrier to species than those above mentioned, the crustacean fauna south of that promontory being strongly Mexican or Lower Californian in character. In exceptional cases, as in Philyra pisum and Cancer amphia- tus, a Japanese species is found to occur in approximately the same latitude on the American coast, without obvious connection by way of Alaska. As is to be expected, the inhabitants of the deeper waters of Bering Sea (below 500 fathoms) are likely to extend much farther south in the North Pacific Ocean than the shoal-water at — ss , . "= DECAPODS 7 species which follow the coast-line. The occurrence of some abyssal forms, as Hymenodora glacialis and H. frontalis, in the deep pocket (1569 fathoms) east of Prince of Wales Island is worthy of note. The following is a list of the genera occurring below the 500- fathom line. Those whose range extends below 1000 fathoms are printed in italics: Pasiphea Pagurus (2 species) Parapasiphz Parapagurus Acanthephyra Pristopus LHymenodora Leptolithodes Pandalopsis (1 species) Lithodes Spirontocaris (5 species) Munida Crangon (3 species) Munidopsis Sergestes Chorilia Benthesicymus Chionecetes Gennadas Hyas Calastacus Dr. Dall * divides his Oregonian fauna, which stretches from the end of the Aleutian chain to Point Conception, California, into three subfaunal areas, with divisions at Yakutat Bay or Mount St. Elias, Alaska, and at Cape Mendocino, California. Professor Nutting,” on the other hand, reasoning from his study of the Hydroids, emphasizes the effectiveness of Puget Sound as a faunal barrier and the continuity of the area between that point and the end of the Aleutian chain.° It is highly probable that future research will make it possible to subdivide the coast into several small areas. 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BInMUaID BO/} occ eee cccece coccceccseescssoos SnHINUIU SOUL ses eeseFesenecs Sestee seeees +gnTmiTS sniposdeiry ee ee weer er eer eaeeereees sIsuauo0saI0 snsdviswmo pT eee rere ee eereee seer ee eeseee snpnu snsdvisi1uio fy cece cere csccsseesreseees CnsIZASUBI} snsdvisAyoug Terre re eee ee ee eee ee | sodissvio snsdvisAyovg sees cece eeceseee eres seeeee cnsigasuvi} sndoyysidG Terre ee eee ee ee ee wmnseyouos skaydojd4iy co cccrccccceccscce secs coocee s serie BXIUUIdUIEG ee ee ceeses cesses SEMUBIC xv do19p9S cee e censor cccceseoascece covces soos OBE BXINUTT eee eee seers ees eeeeeeesseseses sodisuoy vx1uurg Se cece cece ccccce cece cosvocesoos STBIOIT BXIUUlT Sore cece ccccce cess ceseseccos sees BONG} BXIUU cere coer cress ece cece cescece SISUSTUIOFI[VO VXIUULT ree eee ee ee ee sI[ejUapIooo VxIUUT Sore esecesscesescocscccesoooes 19MOf SNIOUCYARY ree ee ee ee ee snyeipenbqns snjouoydeyy teeevecececcccooescccrre + sisua}jasud solayjouulg DECAPODS 19 SYSTEMATIC DISCUSSION OF SPECIES. Suborder MACRURA. Family P4 S7/PH AIDA. Genus Pasiphza Savigny. KEY TO THE SPECIES OF PASIPH/EA, A. Carapace carinated throughout its length. B. Telson truncate, not forked ornotched .... . . magna. B’. Telson forked or notched. C. Branchiostegal spine over the angle of the antero-lateral sinus . . . . pacifica. Cr Branchiostegal spine farther forward, near or on ‘anterior margin. D. Telson longer than sixth segment ... . emarginata. D’. Telson shorter than sixth segment. Z.. Abdomen carinat@e +. 2. 2 ss 2 2 ss frinceps. E’. Abdomen not carinate . . © 6 « «© Corteziana. A’, Carapace not carinated in its posterior Ma Gy acs . affinis. PASIPHAZA MAGNA Faxon? Pasiphea magna Faxon, Bull. Mus. Comp. Zool., XXIv, 209, 1893; Mem. Mus. Comp. Zool., XVIII, 176, pl. XLV, figs. 2-2c, 1895. Gulfof Panama, 458 fathoms. Distribution.— From off Point Arena, California, to Gulf of Panama; 265 to 552 fathoms. Dredged by the A/datross at the following localities: Off Point Arena, California, 455 fathoms, station 3348. Off the Farallones, California, 552 fathoms, station 3162. Off San Francisco, California, 276 fathoms, station 3479. Off Pigeon Point, California, 296 fathoms, station 3112. Off Monterey Bay, California, 418-456 fathoms, stations 3126, 3127. Off Point Sur, California, 328 fathoms, station 3186. The identification of these specimens with . magna is doubtful, but as I have not had the opportunity of comparing them with the type, they are placed here provisionally. Though from the same depth of water, the integument is much firmer in our examples than in the type, the carapace is deeper and its dorsal outline less arched, the branchial ridge is straighter throughout the posterior half of its § course, the palm in the first pair of chele is longer than the fingers. The largest specimen, an ovigerous female from station 3348, is 155 mm. long. The tel- son is a little longer than the sixth segment of son (x ‘ah "Stat 33 i 20 RATHBUN the abdomen, and reaches about to the end of the inner uropod; it is broadly channeled, extremity truncate or slightly convex, and armed with about 13 slender bristles. Eyes brown in alcohol. In the first pair of legs the palm is about one third longer than the fingers; in the second pair the right merus has 14 spines, the left 13. PASIPHZZA PACIFICA Rathbun. Pasiphea pacifica RATHBUN, Proc. U. S. Nat. Mus., XXIV, 905, 1902. The carapace is a little less than half the length of the abdomen, measured on the median line; it is laterally compressed and rises into a well-marked ridge extending nearly to the posterior margin and terminat- ing anteriorly in the median tooth; the ridge is rounded except on =, ES a i .. a aa —— ae — —_ SS ee = Fic. 2. Pasiphea pacifica. ¢ (X14). Station 3186. the forward part of the gastric area, where it forms a thin, sharp keel terminating in a sharp pointed tooth, which is not nearly so advanced as the anterior margin. ‘This tooth is variable, being more or less inclined upward; its terminal portion is usually slender, its anterior margin con- cave. Median tooth of frontal margin narrow, rounded; infra-orbital and antennal angles rounded and ill-defined; antero-lateral angle rounded and slightly obtuse. Behind this angle the antero-lateral margin runs almost directly backward for a short distance, then turns abruptly downward, forming an obtuse angle, and joins obliquely the infero-lateral margin. Above this sinus there is a sharp spine on a level with the middle of the basal segment of the antenna, There is a well- defined blunt ridge on each side of the carapace, running from the DECAPODS 21 hepatic area backward over the branchial region nearly to the posterior border of the carapace. Eyes of moderate size, subglobular on somewhat smaller cylindrical stalks, the cornez of a dark brownish color. The flattened antennular spine does not reach the end of the basal segment; both of the flagella exceed the carapace in length. The second antennz exceed in length the whole body; there is an acute spine on the peduncle below the articulation of the scale; the scale is long-oval, armed with a spine at the distal end, and overreaches the antennular peduncle by a third of its length. The third maxillipeds extend as far forward as the end of the antennal scale. The first pair of legs, when extended forward, surpass the third maxillipeds by the length of the dactylus; the merus is either unarmed, or may have one, two, or even three spines; the basal part of the propodal segment is half again as long as the dactylus. The second pair of legs are longer than the first by about half the length of the fingers, and have longer and more slender chelze; the second segment is armed with a small spine at the distal end of its inferior margin. The third pair reaches forward a little beyond the proximal end of the chela of the preceding pair; except for the first two segments, they are thread- like; all the segments are naked and unarmed; the merus is about one half the length of the whole appendage, and more than twice as long as the propodus. The fourth pair of legs reaches scarcely to the middle of the merus of the second pair; the lower margin of the dactylus, propodus, and distal half of the carpus is fringed with bristles. The fifth pair, when extended, reach to the middle of the merus of the second pair; the dactylus is elongate-oval, the margin of its distal half fringed with long sete. The second to sixth abdominal segments inclusive are carinated on the median line. The sixth segment is from two thirds to three fourths longer than the fifth; it is marked on either side by a curved longitudinal ridge. Telson four fifths as long (==> as sixth segment; dorsal surface channeled; extremity 76 3,0e(ge Ae with a deep notch, bordered by spinules, which in- Sttion 345s: crease in size and are continued to the posterior outer angle of each lobe; the outer spinule is considerably longer than the others and is very often broken off. _ Dimensions.—Length of female, 64.8 mm.; length of carapace, 20.3 mm, Distribution.—This species occurs sparingly from Unalaska and the 22 RATHBUN Gulf of Alaska southward to the Gulf of California, in 53 to 399 fathoms (one specimen from 13 fathoms, if the label be correct). The following are the specific localities of the A/batross represented : North of Unalaska, 399 fathoms, station 3329. Portlock Bank, Alaska, 230 fathoms, station 2858. Off Queen Charlotte Sound, British Columbia, 204 fathoms, station 2861. Queen Charlotte Sound, British Columbia, 238 fathoms, station 2862. Gulf of Georgia, British Columbia, 67 fathoms, station 2863. Strait of Fuca, 135-152 fathoms, stations 3449, 3454-3456. Puget Sound, 82 fathoms, station 3067. Off Tahwhit Head, Washington, 178 fathoms, station 3076. Off Pigeon Point, California, 296 fathoms, station 3112. Monterey Bay, California, 13-382 fathoms, stations 3134, 3202, 3669. Off Point Sur, California, 316, 328 fathoms, stations 3188, 3186 (type). Off San Simeon Bay, California, 53 fathoms, station 3191. Off San Luis Obispo Bay, California, 252 fathoms, station 3195. Off Point Conception, California, 278, 284 fathoms, stations 3198, 2892. Santa Barbara Channel, California, 233-280 fathoms, stations 2840, 2960, 3199, 3200, 3201. Off San Miguel Island, California, 376 fathoms, station 2896. Off Santa Cruz Island, California, 266, 269 fathoms, stations 2947, 2948. Off San Diego, California, 339 fathoms, station 2925. Gulf of California, northwest of Tiburon Island, 145 fathoms, station 3015. pee Sa Our species differs from the others with carinated carapace in having the branchiostegal spine situated above the angle of the antero-lateral sinus, PASIPHAZZA EMARGINATA Rathbun. Pasiphea emarginata RATHBUN, Proc. U. S. Nat. Mus., XXIV, 905, 1902. I have proposed the name P. faxoni for P. acutifrons Faxon, not Bate. There are in the National Museum specimens which I believe to be B acutifrons Bate, from the west coast of Patagonia, 194 fathoms, station 2784, Albatross. FP. faxoni differs from them in the broader median lobe of the front; in the antero-lateral sinus being an obtuse angle, while in P. acutifrons it is a right angle or less; in the sixth abdominal segment compressed, blunt above, scarcely carinate, in P. acutifrons sharply cari- nate; in the telson much shorter than the sixth segment, in P. acutifrons very little shorter; in its shallower notch, which is broader than long. P. emarginata differs from P. faxoni as follows: The median carina is less sharp and less prominent; the gastric tooth smaller; the carapace proportionally higher in its posterior portion, the branchial ridge more sinuous; the carapace relatively longer, being equal to the first five segments and half of the sixth segment of the abdomen; DECAPODS 23 the telson is longer than the sixth segment, and at the posterior end is notched with a very shallow V-shaped sinus, so shallow that the extremity can hardly be called ‘ forked.’ Dimensions.— Length of female 81 mm., of carapace 33.3 mm. . Distribution.— Santa Barbara Chan- nel, California, 265 to 322 fathoms (= : é (A lbatross stations 2903, 2904, 2960, Fic. 4. Pasitheaemarginata. %. Station 3200, and 3201). Gulf of California, 45%,,¢Sige view of carapace (x 18). 6. off Concepcion Bay, Lower California, 857 fathoms, station 3009 (type locality). PASIPHAA PRINCEPS Smith. Pasiphaé princeps SMITH, Rept. U. S. Commr. Fish and Fisheries for 1882, p. 381, pl. V, fig. 2 (1884); of. cé¢. for 1885, p. 682 (1886). Pasiphacia princeps F AXON, Mem. Mus. Comp. Zool., XvIII, 175, 1895. One large female, 167 mm. long, was dredged by the AZbatross off Sea Lion Rock, Washington, in 859 fathoms, station 3075; and one small specimen about 47 mm. long, north of Unalaska, in 399 fathoms, station 3329- I have at hand only one specimen determined by ProfessorSmith. It was taken south of Marthas Vineyard in 538 fathoms, at station 2546. It measures 150 mm. long. It differs from the type in having the carina of the posterior two thirds of the carapace well marked though blunt, in the gastric tooth projecting well beyond the frontal margin, the anterior (or inferior) margin of this spine contiguous with the dorsal surface of the carapace in advance of the spine, and in having the merus of the first and second pairs of feet armed with numerous spines (instead of the first pair unarmed and the second pair few-spined). The antero-lateral sinus is rectangular, as in the figure of the type. In five smaller specimens from off Cape Romain, South Carolina, 353 fathoms, station 2626, and two from off Marthas Vineyard, 349 fathoms, station 1093, the gastric tooth projects only a little beyond the frontal margin, and the antero-lateral sinus has margins oblique to each other; otherwise as in the preceding. In the specimen from off Ecuador described by Faxon (vc. cit.) the merus of the first pair of feet is unarmed. The Washington specimen agrees quite closely with that from station 2546, excepting that the median carina of the carapace is sharper along its posterior two thirds. The small individual from Bering Sea may 24 RATHBUN prove to be distinct; the gastric spine is shaped as in the figured type, but a little narrower and more ascending; the merus of the first pair of feet has one or two spines, of the second pair many spines. Distribution.—North Atlantic, from lat. 39° 56/ oo” N., long. 69° 45/ oo” W. to lat. 329 27’ 30” N., long. 77° 20! 30” W., 349 to 1342 fathoms. North Pacific: Bering Sea, 399 fathoms; Washington, 859 fathoms. Ecuador, 1132 fathoms. PASIPHZZA CORTEZIANA Rathbun. Pasiphea corteziana RATHBUN, Proc. U. S. Nat. Mus., XXIV, 905, 1902. Carapace equal to the first five segments and part of the sixth segment of the abdomen. Gastric tooth dentiform, continued back in a very blunt carina; tip acute, upper margin nearly horizontal, anterior margin in- clined slightly forward and upward, not as produced as the anterior margin of the carapace. Median lobe of front triangular, obtuse. ee ae Branchiostegal spine small, inserted near the antero-lateral angle just be- hind the anterior margin. Antero- _/* lateral sinus with sides forming an = obtuse angle. b SSS The eye-stalks are only slightly ER AEM PP EAI, aye enlarged distally, the cornez reddish Side view of sarauae (x 4. Telson (x 23). brown. The flattened antennular scale falls short of the end of the first peduncular segment. End of antennal scale more lobiform than in P. pacifica. The merus of the first pair of legs is armed with 3 or 4 spines; of the second pair, with many spines. Distal end of second segment of second pair ending in a small spine; fingers longer than palm. Abdomen without median carina. Telson very nearly as long as the sixth segment, and forked with a deep sinus. For the rest, almost as in P. pacifica. Dimensions.— Length of male 64 mm., of carapace 23.8 mm. Lype locality.— Near Cortez Bank, Calif., in lat. 32° 44’ oo” N., long. 119° 32’ oo” W., 776 fathoms (A/azross station 3627). PASIPHAZA AFFINIS Rathbun. Pasiphea affinis RATHBUN, Proc. U. S. Nat. Mus., XXIV, 905, 1902. Very closely related to P. corteziana. Carapace equal to the first four segments and half of the fifth seg- DECAPODS 25 ment of the abdomen; not carinated behind gastric tooth; outline much as in the preceding, as are also the eyes and antenne. Second to sixth abdominal segments inclusive carinate; telson very nearly as long as the sixth segment, less deeply notched than in Pusiphea corteziana. The side view strongly resembles that of ee ° . ° SSDs eet ee terre pray Lf. corteziana, from which the carinated ab- acon a aaa eS n domen and shorter carapace without median = carina at once distinguish it. Coe Dimensions.—Lengthof male67mm.,length b of carapace 22 mm. teas spy as olsen Oe ah Type localitty.—Near Cortez Bank, Calif., Hand of second pair (x2). lat. 32° 17’ oo” N., long. 119° 17’ 00” W., 984 fathoms (Abatross station 2919). Genus Parapasiphze Smith. PARAPASIPH SERRATA Rathbun. Parapasiphe serrata RATHBUN, Proc. U.S. Nat. Mus., XXIV, 904, 1902. Carapace and rostrum as long as the first five abdominal somites. The median carina extends backward to the posterior fifth of the cara- Fic. 7. Parapasiphe serrata. (xX about 14). Station 2919. pace or the cervical groove, and forward along the high thin rostrum which reaches half way along the eye-stalks; the carina is a little concave at the middle of the carapace and anteriorly slopes downward, and is armed with 16 small teeth or spines, two of which are on the rostrum and one is terminal; below this spine the rostrum is a compressed, finely crenulate lobe. Orbital and antennal angles blunt. There is a small spine just behind the orbital angle, and another still farther back in a 26 RATHBUN line with the acicle. The branchiostegal sinus is rectangular, the angle rounded. From the post-antennal spine a ridge runs nearly straight back, with one interruption, almost to the posterior margin. A groove runs from just in front of the middle of the posterior margin vertically half way down the carapace. Eyes light brown, almost colorless in alcohol, nearly as wide as their stalks. The antennular scale, which is foliaceous and hasa sharp spine at the upper extremity, is as long as the basal joint of the peduncle. Antennal scale nearly half as long as carapace proper, elongate-oval, with a stout midrib, and its outer border thickened and ending in a slender terminal spine. The external maxillipeds, which are stouter than any of the last three pairs of legs, reach almost to the tip of the antennal scale; all their joints are setose; the antepenultimate segment is broadened in its middle por- tion, tapering at each end. The first two pairs of legs are similar in form, the second pair the longer and about half the length of the body. In the first pair, the pos- terior border of the merus and palm are spinous, and the distal angles of the wrist are produced; the fingers equal the palm in length. In the second pair, the posterior border of the basis, ischium, merus, and palm is spinous; the angles of the wrist are more strongly produced; the fingers are nearly as long as the palm. In each case the hand forms about two fifths of the entire length. The filiform third pair (tip broken off) are equal in length to the carapace exclusive of the rostrum. The fourth and fifth pairs have the terminal joint narrow-oval; the fifth pair are the longer and two thirds the length of carapace. The first three abdominal somites are non-carinate, the fourth is pos- teriorly produced in a thin compressed spine which is carinate and has a slight notch at its base, visible in profile; the sixth has a longitudinal groove on either side. The telson is a little longer than the sixth somite, shorter than the inner uropod, and much shorter than the outer one; it is truncate at the tip. Dimensions.—In an egg-laden female the length of the carapace and rostrum is 23.6 mm., the rostrum 1.8 mm., the abdomen 42 mm. Type locality.—Off Cortez Bank, Calif., 984 fathoms (A/batross station 2919), one female, This species is akin to P. gilesii Wood-Mason, from the Indian Ocean, which also has a serrated carina running the whole length of the cara- pace, but the character of the rostrum alone separates it distinctly from that species. In FP. gilesii, the rostrum is a fine, acute, upcurved spine, extending about a third of its length beyond the eyes. DECAPODS 27 Family OPLOPHORIDA.. Genus Acanthephyra A. Milne Edwards. ACANTHEPHYRA CURTIROSTRIS Wood-Mason. Acanthephyra curtirostris WOoD-MASoN, Ann. Mag. Nat. Hist. (6), VII, 195, 1891; IX, 364, fig. 5, 1892. Ill. Zool. Investigator, Crustacea, pl. III, fig. 4, 1892. —Faxon, Mem. Mus. Comp. Zool., xvill, 164, pl. XLIII, figs. 2-5, 1895.— ALCOCK, Desc. Cat. Indian Deep-Sea Crust., 81, 1901. Distribution.— Arabian Sea, 937-1043 fathoms; Bay of Bengal, 364- 913 fathoms; Andaman Sea, 922 fathoms (Alcock), From off San Diego, California, to off Gulf of Panama, 458-2232 fathoms. Off San Diego, 623 fathoms, one male of the typical form (A/datross station 2929); Gulf of California, 857 and 1oos fathoms (Albatross stations 3009 and 3010); see also Faxon, Joc, cit. Genus Hymenodora Sars. KEY TO THE SPECIES OF HYMENODORA, A. Rostrum very short, not reaching beyond the first antennularsegment .. 0. =~ gh ~Reeeaans, A’. Rostrum reaching end of antennular peduncle » engite. ” JP OUMLEES, HYMENODORA GLACIALIS (Buchholz). iar glacialis BUCHHOLZ, Zweite Deutsche Nordpolarfahrt, 11, 279, pl. 1, Decne Cacials G. O. SARS, Arch. for Math. og Naturvid., 11, 241, 1877; Norske-Nordhavs-Exped., Crustacea, I, 37, 275, pl. Iv, 1885.— SMITH, Proc. U. S. Nat. Mus., VII, 501, 1885 (part); Rept. U. S. Fish Commr. for 1885, 678, pl. Xv, figs. 3, 10, pl. XVI, fig. 5, 1886. Distribution.— Between Norway and Greenland, lat. 63° to 80° N., 452 to 1862 fathoms (Norwegian North Atlantic Expedition); Faroe Channel (Knight Errant). East coast of North America (U. S. Fish Commission) : Lat. 42° 48/ 00” N., long. 50° 55/ 30” W., 826 fathoms (sta- tion 2428) ; lat. 40° 03! 30’ N., long. 67° 27/15” W., 1149 fathoms (station 2535); lat. 38° 19/ 26” N., long. 68° 20! 20” W., 2369 fathoms (Smith) ; lat. 37° 12! 20” N., long. 69° 36/00” W., 2949 fathoms (Smith). Bering Sea, south of Pribilof Islands, 1401 fathoms (station 3604), 1@. East of Prince of Wales Island, Alaska, 1569 fathoms (station 2859),2¢. Gulf of California, 857 fathoms (station 3009); go5 and 1218 fathoms (Faxon). Gulf of Panama, 1832 fathoms (Faxon). Off Ecuador, 1740 fathoms (Faxon). 28 RATHBUN HYMENODORA FRONTALIS Rathbun. Hymenodora frontalis Rathbun, Proc. U. S. Nat. Mus., xxXIv, 904, 1902. Integument very thin, but firmer than in H. g/acialis; covered with fine wrinkles or rugose lines. Carapace and rostrum more than half as long as abdomen; median carina extending almost or quite to the mid- dle of the carapace, and advanced in a rostrum which is unusually long for the genus, being from two fifths to one half as long as the remainder of the carapace, and reaching the end or a little beyond the end of the antennular peduncle. The rostrum is a slender, sharp-pointed spine; distal half slightly curved upward and usually unarmed, basal half armed Fic. 8. Hymenodora frontalis. % (X about 2). Station 3308. with from 3 to 6 small spines above, two or three of which are beyond the line of the orbit. Occasionally there is a single spine on the distal half. Orbit deep; a tiny spine tips the suborbital lobe. Antennal spine strong ; from it a sharp carina runs back subparallel to the side margin quite to the posterior margin. Above this the branchial region bears a blunt ridge, chiefly longitudinal, but bent down at either end; a deep groove extends obliquely downward and backward from the orbital sinus nearly to the lower carina. The eyes reach to the middle of the basal segment of the antennulz ; they are without pigment, and bear a slender, blunt spine close up to the cornea on the inner margin. The antennular peduncles are short, the segments diminishing successively in length; basal scale narrow-oval, as seen from above; upper flagellum very thick at base. Antennal scale lanceolate, outer margin nearly straight, tipped with a small spine; peduncle very stout, attaining the end of the first antennular segment. DECAPODS 29 The outer maxillipeds do not reach the end of the antennal scale; the first pair of feet reach to the middle of the scale; the second pair extend not quite so far, and are more slender; the third pair reach nearly to or beyond the end of the scale; the fifth pair to the end of the antennal peduncle. The meral and propodal joints of the last three pairs are furnished with fine sete. Abdomen devoid of a median carina or median spines; the sixth seg- ment is two and a half times as long as the fifth, and between three fourths and four fifths as long as the telson. The telson is about as long as the outer branch, longer than the inner branch of the swimmeret; it is armed with 7 to g spinules on either side and 4 long spines at the end. Eggs few and very large, the greatest diameter equaling the length of the fifth abdominal segment. Dimensions.—Male, length of carapace and rostrum 19 mm., of rostrum 6.5 mm., of abdomen 32.5 mm. Distribution—From Bering Sea to off Monterey Bay, California, and Kamchatka; 322 to 1771 fathoms. Taken at the following stations of the Albatross : North of Rat Islands, Aleutians, 850 fathoms, station 3784. Southwest of Pribilof Islands, 1625, 1771 fathoms, stations 3308, 3603. North of Islands of Four Mountains, 1033 fathoms, station 3307. South of Pribilof Islands, 1401 fathoms, station 3604. West of Unalaska (type locality), 322 fathoms, station 3327. North of Unalaska, 399 fathoms, station 3329. Southeast of Chirikof Island, 695 fathoms, station 3340. East of Prince of Wales Island, 1569 fathoms, station 2859. Off Queen Charlotte Islands, British Columbia, 1588 fathoms, station 3342. Off Destruction Island, Washington, 516 fathoms, station 3343. Off Sea Lion Rock, Washington, 636-877 fathoms, stations 3070, 3071, 3°74, 3075- Off Monterey Bay, California, 418 fathoms, station 3127. Off Copper Island, Kamchatka, 1567 fathoms, station 3783. Relations.—The rostrum of this species approaches that of 1. rostrata Bate, but is considerably longer; the pleon is like that of H. glacialis (Buchholz), 1. glauca Bate, and 4. molicutis Bate in being without median carina and spines. Family PALZMONIDA. Genus Palzemon Fabricius. PALAZZMON RITTERI Holmes. In this species either one or two of the seven or eight dorsal teeth are situated behind the rostrum, Three ventral teeth. 30 RATHBUN Distribution.—From San Diego, California (type locality), to Gulf of California. Bay of St. Elena, Ecuador (Nobili). ‘Specimens are in the Na- tional Museum from San Bartolomé Bay, Magdalena Bay, and La Paz Harbor, Lower California, and Carmen Island, in the Gulf of California; all of these were collected by the Albatross. PALAZ.MONETES KADIAKENSIS Rathbun. ' Palemonetes kadiakensis RATHBUN, Proc. U.S. Nat. Mus., XXIV, 903, 1902. Rostrum about as long as the carapace; it may be a little longer or a little shorter; nearly horizontal, very slightly upcurved, dorsally 6- or —-- °- ee = af, 4 6 Fic. 9. Palemonetes kadiakensis. @ (X 2%). Kadiak. 7-serrate, one tooth behind the orbit, ventrally 2- or 3-serrate. Sub- orbital angle rounded, a spine just below it, also an antennal spine; antero-lateral angle rounded. Eye wider than the stalk, light-colored in alcohol, a small black ocellus above near its margin. Antennular peduncle reaches about four fifths the length of antennal scale, basal joint the longest, having an outer scale which projects along one third of the second joint, and is tipped at its outer distal angle with a small spine. The outer filament of the outer flagellum is over half as long as the body; the inner filament is very short, equaling in length the last segment of the peduncle; inner flagel- lum about three fourths as long as outer, es ee DECAPODS 31 - Antennal scale as long or nearly as long as the carapace, oblong, the blade projecting considerably beyond the scale; preceding segment armed with a small spine at the outer base of the scale; peduncle not quite reaching end of first antennular segment; flagellum one and a third times the length of the body. Outer maxillipeds very slender, reaching when extended only a small bit beyond the antennal peduncle. Feet of first pair reaching nearly to end of scale, carpus longer than merus, enlarged distally, and more than twice as long as propodus, fingers subequal in length to palm and covered with hair. Feet of second pair reaching beyond scale by half the length of propodus; carpus one and a half times merus, propodus three fourths length of carpus and no wider than in the first pair; fingers shorter than palm. The third to fifth pairs of feet increase successively in length by about half the length of the dactyli; the fourth pair reaches just to the end of the scale; dactyli slender and contained about three times in their propodi, which are sparingly spinulous. Sixth abdominal segment twice as long as fifth, and nearly as long as the telson. Swimmerets longer than the telson, the outer branch longer than the inner. Dimensions.—Length of 2 39 mm., length of carapace and rostrum 15 mm., of rostrum 7 mm. Type locality.—Kadiak Island, Alaska, under stones at low water; William J. Fisher, collector, The abdomen is much longer than in P. vulgaris Say of the Atlantic coast of North America, the sixth segment being one third again as long as in P. vulgaris with equal carapace; the rostral teeth are fewer, the acicle larger, the chelipeds of the second pair more slender. From ?. varians Leach it differs in its longer rostrum, shorter feet of the second pair, in which the relative length of the segments also is quite different. Genus Urocaris Stimpson. UROCARIS INFRASPINIS Rathbun. Urocaris infraspinis RATHBUN, Proc. U. S. Nat. Mus., XXIV, 903, 1902. Closely allied to U. /ongicaudata Stimpson of the West Indian region. Carapace and rostrum equal in length to the first three segments and half of the fourth segment of the abdomen. Rostrum not reaching end of second antennular segment, convex above, armed with 5 to 7 teeth above, 1 or 2 small teeth below near tip, tip acuminate; behind the rostrum a median gastric spine. Suborbital angle blunt. Antennal and hepatic spines of good size. Eyes two thirds as long as first antennular 32 RATHBUN segment, a minute black ocellus above and toward the outside, and be- yond the limit of the cornea. Fic. 10. Uvocaris infraspinis. @ (X 33). Locality unknown. a. Side. & Dorsal view of anterior portion. Antennular peduncle nearly as long as carapace, exclusive of rostrum ; first segment broad, its thin outer margin armed with a spine on the basal portion and another at the extremity; the inner angle of the lateral ex- pansion is advanced beyond the articulation of the second joint; second and third segments subequal and together nearly equal to the first. The acicle is oblong, extremity oblique, produced at inner angle away beyond outer spine, which is in line with end of antennular peduncle. The an- tennal peduncle scarcely reaches end of first antennular segment; fla- gellum as long as body. The outer maxillipeds extend to the middle of the last joint of the an- tennal peduncle. The first pair of feet reach the spine of the acicle; merus, carpus, and propodus subequal, palm and fingers subequal. The second pair of feet are as long as the distance from the end of the ros- trum to the posterior end of the first abdominal somite; the ischium, merus, and carpus subequal, palm a little shorter, swollen; fingers nearly aslongas palm. Last three pairs of feet reaching about to end of acicle; dactyli short, with a slender spine on the under side. Abdomen geniculated at the third segment. Posterior margin of all the segments truncate. Sixth segment shorter than carapace (rostrum excluded), less than twice as long as fifth segment, and a little longer than the telson. Telson with two pairs of lateral spines, the outer uropods much longer than the telson, the inner uropods intermediate in length between the outer pair and the telson. Dimensions.—Length of carapace and rostrum of ovigerous ¢ 6 mm., of rostrum 2.5 mm., of abdomen 15 mm. DECAPODS 33 Type locality.—Gulf of California, in Concepcion Bay, Lower Calif., two 9 (Albatross). Distribution.—Also taken at San Diego Bay, California, 3 fathoms (Albatross station 3567); Gulf of California, off San Josef Island, Lower California, 8 fathoms, station 3006; Guaymas, Mexico, inner harbor (P. L. Jouy, collector). One lot without label was associated with Crangon nigromaculata Lockington. Relations.—This species, while having the general appearance of U. longicaudata, is markedly different: U. /ongicaudata has no antennal spine on the carapace; U. infraspinis has a distinct ocellus outside the cornea, U. longicaudata has not; in U. infraspinis the palm and fingers of the first pair are subequal; in U. dongicaudata the palm is longer than the fingers; in U. infraspinis the carpus of the second pair is subequal to the merus, the palm is a little shorter, and the fingers still shorter; in U. longicaudata the carpus, palm, and fingers are subequal to one another and shorter than the merus; in our species the sixth abdominal somite is shorter than the carapace, and less than twice as long as the fifth; in U. longicaudata the sixth segment is as long as the carapace (rostrum excluded) and twice as long as the fifth. Family PONTONIIDA. Genus Pontonia Latreille. PONTONIA CALIFORNIENSIS Rathbun. Pontonia californiensis RATHBUN, Proc. U.S. Nat. Mus., XXIV, 902, 1902. The carapace and rostrum exceed in length the first six segments of ' the abdomen. Rostrum more than one third the length of the re- mainder of the carapace, very narrow throughout, deflexed, reaching to , the middle of the second segment of the antennular peduncle. A tooth on the anterior margin just above the base of the antenna. The eyes reach to the middle of the first antennular segment. The lateral expan- sion of this segment is broad behind and narrow in front, terminating in a short spine at the anterior angle; second segment one and a half times as long as third, both together half as long as first. Scale about two fifths as long as carapace, scarcely exceeding the antennular peduncle, the spine of the scale about as produced as the blade. Antennal peduncle reaching to end of scale. Feet of first pair extending beyond the scale by the length of the propodus and nearly the whole of the carpus; merus and carpus subequal and each twice the ischium; propodus a little shorter than carpus; palm 34 RATHBUN and fingers subequal. The right foot of the second pair is missing; the left has a short, stout merus, carpus cup-shaped, with an inner distal _ tubercle, and a tubercle near the middle of the distal margin; palm and fingers subequal in length, palm two thirds as broad as long, inner edge marginate, fingers gaping, prehensile edges denticulate, fringed with long hair. Dac- tyliof last three pairs of feet with a sub- 4] terminal and a ter- as minal spine. \\ The telson is twice \ ‘/ as long as the pre- xt. J ceding segment, and has two pairs of eg long lateral appressed = eS spines inserted on the anterior half. The outer uropod is as long as the tel- son, the inner uropod a little longer. Dimensions.—Length of carapace and rostrum 6.7 mm., of rostrum 1.8 mm., of abdomen g mm. . Type locality. — Off Santa Cruz Is- land, Calif., 30 fathoms (Albatross station 2945), one female. spon Poy gage «dap 49)- This is the only Pontonia described from the west coast of North America, the P. margarita of Smith being a Conchodytes. Genus Periclimenes Costa. PERICLIMENES TENUIPES (Holmes). Anchista tenuipes HOLMES, Occas. Papers Calif. Acad. Sci., VII, 216, 1900. Not P. fenuip~es Borra- daile, which may be called P. borradailei, nom. nov. Distribution.— From San- : ta Catalina Island, Califor- @ nia (Holmes), to Gulf of California. The Albatross ; . Fic. 12. Periclimenes tenuipes (X 4). Concepcion Bay. collected specimens at a. Carapace. 4. Foot of second pair. DECAPODS 35 Concepcion Bay, Lower California, and at stations_2824 and 2825 in the Gulf of California, 7 and 8 fathoms. They agree with Dr. Holmes’s description, except that the fingers of the second pair of feet are only a little over half as long as the palm and the postero-lateral angle of the sixth abdominal segment is subacute, Family PANDALID 4. Genus Pandalus Leach. KEY TO THE SPECIES OF PANDALUS. A. Third segment of abdomen in part compressed and carinated, the carina forming a more or less well defined lobe or spine in front of the posterior margin. B. Third and fourth segments of abdomen armed with a median spine On posterior Margmie. 4 6 5 8s se borealis. B’. Third and fourth segments of abdomen without median spine on posterior margin. C. Rostrum unarmed on distal half of superior margin . goniurus. C’. Rostrum with spines on distal half of superior margin. jordant. A’. Third segment of abdomen not compressed and carinated, and with- out a median lobe or spine in front of posterior margin. B. Dorsal spines not reaching behind middle of carapace. C. Sixth abdominal segment more than twice as long as wide. D. Carapace and abdomen covered with short transverse rugose BR a) see ee hs we me Wor eS la, os. SOP D’. Carapace and abdomen smooth .. . . moniagui tridens. C’. Sixth abdominal segment less than twice as long as WTR CRON WER Gk oe Eas ot Peabpeeres. B’. Dorsal spines extending behind middle of carapace. C. Dorsal spines more than 15 (17-21). . . . . « Aypsinotus. C’. Dorsal spines less than 15. D. Rostrum one and a half or more than one and a half times as long as carapace. 1. 6's we et te Zurn. D’. Rostrum less than one and a half times as long as carapace. E. Antennal scale very narrow, the terminal half of the blade narrower than the adjacent thickened portion stenolepis. E’. Antennal scale of moderate width, the terminal half of the blade not narrower than the adjacent thickened por- obese. 6 wo ce Sao ek CE Be ee PANDALUS BOREALIS Kroyer. Pandalus borealis KROYER, Naturh. Tidsskrift, 11, 254, 1838; (2) 1, 461, 1845; in Gaimard’s Voyage en Scandinavie, en Laponie, etc., pl. VI, fig. 2. STIMPSON, Jour. Boston Soc. Nat. Hist.,v1, 501 [61],1857; Ann.Lyc. Nat. Hist. N. Y., X, 128, 1871.—SMITH, Trans. Conn. Acad. Arts Sci., V, 86, 1879.—BIRULA, Ann. Mus. Zool. Acad. Impér, Sci. St. Pétersbourg, 1897, p. 420 [16]; 1899, pp. 22 [3], 28 [9]. 36 RATHBUN Surface of body smooth and naked. Rostrum about one and three fourths times as long as the carapace, slightly arched above the eyes, terminal half slightly ascending; slender, armed with 12 to 16 teeth above (including 3 or 4 on the carapace), of which all but the one, two, or three most anterior are movable, and 6 to g distant immovable teeth below, diminishing in size anteriorly; tip bifid, upper tooth the smaller. The posterior of the dorsal spines lies between the middle and the anterior third of the carapace; the anterior is situated at least as far forward as the distal third of the rostrum. Antennal spine strong, pterygostomian slender, feeble. Eyes large, pyriform. Peduncle of antennule reaching to the middle of antennal scale; second and third joints subequal; outer flagellum twice as long as cara- pace, its basal third thickened; inner flagellum longer than outer. An- tennal scale seven eighths as long as carapace, the blade obliquely _ rounded at the end and exceeding the spine. Antennal peduncle extending to end of second joint of antennular peduncle; flagellum longer than the body. Outer maxillipeds reaching to distal fourth or nearly to end of scale. First pair of feet shorter, but overreaching middle of scale. Of the second pair of feet, the right is one and a half or one and two thirds times the length of carapace; its carpus is divided into 25 to 27 segments: the left is slenderer and one fourth or one third again as long as the right; its carpus has about 58 segments. The third, fourth, and fifth diminish slightly in length in the order named, the third pair overreaching the scale by at least the length of its dactyl. The dactyli are slender, and are contained in the propodi from three to three and a half times. The terminal portion of the third segment of the abdomen is com- pressed and carinated; a sharp spine or lobe pointing backward is situ- ated at the posterior third of the segment; posterior margin produced backward in an acute lobe terminating in a small spine. A similar spine terminates the truncate fourth segment. Sixth segment elongate, about twice as long as fifth; seventh armed with 7 to ro aculei on each side, and 4 terminal, of which the submedian pair are slenderer and about half as long as the outer pair. Dimensions.—Ovigerous female, length 13.5 cm., length of carapace and rostrum 64 mm., of rostrum 41 mm. Females carrying eggs were taken August 5th and 6th in Bering Sea (stations 3528, 3530). Distribution.—Circumpolar. Bering Sea and North Pacific southward on the American coast to Columbia River; 2934 to 350 fathoms. DECAPODS 37 Okhotsk Sea (Brandt). On Atlantic coast of North America from Greenland southward to Massachusetts Bay, 40 to 160 fathoms. Scan- dinavia. Juneau, Alaska, 50 fathoms (Harriman Expedition). Taken by the Albatross at the following localities: Bering Sea, southwest of St. Matthew Island, 59-77 fathoms, stations 3539, 3532+ Bering Sea, off Pribilof Islands, 39-184 fathoms, stations 3309, 3439- 3442, 3482-3489, 3491-3497, 3500, 3511, 3523, 3524, 3526-3528, 3533-3536, 3538, 3539, 3544, 3553-3556, 3559-3561, 3602, 3605, 3606, 3609, 3610. Between Bristol Bay and Pribilof Islands, 2914-36 fathoms, stations 3252, 3253, 3306. North of Rat Islands, 270 fathoms, station 3785. North of Umnak Island, 49 fathoms, station 3537. North of Unalaska, 61-350 fathoms, stations 3226 (1 quart rejected), 3316 asd fathoms, 1 specimen), 3317, 3318, 3331 (350 fathoms, 1 speci- men). Chernofski Harbor, Unalaska, 109 fathoms, station 3324. Pumicestone Bay, Unalaska, 54 fathoms, station 3321. Iliuliuk Harbor, Unalaska, 50-93 fathoms, stations 3310, 3311, 3313; 3314 (1 quart rejected), 3334-3336. Off Akutan Island, 56-91 fathoms, stations 2841, 2842, 3548, 3549. Off south entrance to Akutan Pass, 45 fathoms, station 2843. Off Aektok Island, 54 fathoms, station 2844. Northwest of Unimak Island, 41-121 fathoms, stations 3224 (% peck discarded), 3225 (2 bushels rejected), 3257 (1 peck rejected), 3258, 3259, 3263 (2 quarts rejected). Unimak Pass, 34 fathoms, station 3220. North of Unimak Island, 49 fathoms, stations 3256, 3542. Davidson Bank, 42 fathoms, station 2845. South of Unimak Island, 61 fathoms, station 3216. Off Kudobin Islands, 36—53 fathoms, stations 3278, 3279 (1 pint rejected), 3280, 3282, 3283. Shumagins, 48-110 fathoms, stations 2847, 2848 (abundant), 2849, 2852. South of Trinity Islands, 67 fathoms, station 3341. Off Sitkalidak Island, 60 to 69 fathoms, stations 2854, 2855. Gulf of Georgia, British Columbia, 67 fathoms, station 2863. Strait of Fuca, 40-152 fathoms, stations 3445, 3446, 3451, 3453, 3455, 3458-3462, 3464, 3465, 3596, 3597- Washington Sound, Strait of Fuca, 48 fathoms, station 2864 (very numer- ous). oe sind. 82 fathoms, station 3067. Admiralty Inlet, Puget Sound, 40 fathoms, station 2865. Off Cape Flattery, Washington, 38 fathoms, station 2872. Off Columbia River, 68 fathoms, station 2882. Station 3675 (locality not given), 110 fathoms, Unalaska (Brandt), 38 RATHBUN PANDALUS GONIURUS Stimpson. Plate 1, fig. 3. Pandalus goniurus STIMPSON, Proc. Acad. Nat. Sci. Phila., x11, 36 [105], Pobieber dapifer MURDOCH, Proc. U. S. Nat. Mus., VII, 519, 1884; Marine Invertebrates, in Rept. International Exped. to Pt. Barrow, Alaska, 141, pl. I, figs. 2-2c, 1885.—- RATHBUN, The Fur Seals and Fur-Seal Islands of the North Pacific Ocean, Pt. III, 557, 1899. Allied to P. dorealis, Rostrum one and a half times as long as cara- pace, terminal half ascending, posterior half horizontal; armed above with 8 to 9 movable spines, including 3 on carapace; the anterior spine behind middle of rostrum, the posterior spine in front of middle of carapace; lower limb deeper in front of eye than in F dorealis, and armed with 6 or 7 immovable spines; tip bifid, upper tooth smaller. Antennular flagella shorter than in F. doreadis, the inner and longer one being one and a half times as long as carapace. ‘The spine at the antero-lateral angle of the antennal scale extends nearly to the end of the blade. Antennal peduncle falls a little short of end of second joint of antennular peduncle; flagellum nearly as long as body. Carpus of right foot of second pair divided into 18 to 20 articles; the left foot nearly one and a half times the right and with 51 to 54 articles. The third segment of the abdomen possesses a lobe as in P. borealis, but the lobe is blunt, not sharp; the median line in front of the lobe is nearly horizontal; the posterior margin is only slightly produced back- wards at its middle; and it, as well as the fourth segment, is devoid of a median spine. ‘The sixth segment is a little shorter than in P. dorealis, seventh segment bears 5 to 6 lateral spinules. Otherwise as in P. dorealis. Sometimes occurs with P. dorealis, though an inhabitant of shallower water. They are easily distinguished by the presence of spines on the anterior half of the top of the rostrum in P. dorealis and the absence of the same in FP. goniurus; and by the blunt rather than sharp lobe on the third abdominal segment in the last-named species, as well as the absence of median spines from the posterior margin of the third and fourth segments. Dimensions.—Large female: Length 90 mm., length of carapace and rostrum 41.5 mm., of rostrum 25.2 mm. Distribution—Ranges from the Arctic coast of Alaska southward to Okhotsk Sea on the one side and Puget Sound on the other, in 3 to 100 fathoms. Its occurrence below so fathoms is exceptional. Taken by the A/datross at the following localities: DECAPODS 39 Bering Sea, off St. Matthew Island and Pribilof Islands, 21-59 fathoms, stations 3439, 3513, 3514, 3523, 3524, 3531, 3536, 3611. Off Nunivak Island, 17-24 fathoms, stations 3516, 3517. Off Cape Newenham, 17 fathoms, station 3247 (1 gallon rejected). Off Hagemeister Island, 414-174 fathoms, stations 3243, 3244, 3246. Kulukak Bay, 11-144 fathoms, stations 3240-3242 (4% peck rejected). Off Kulukak Bay, 15-17 fathoms, stations 3300, 3301 (2 quarts rejected). Bristol Bay, 5-18 fathoms, stations 3233, 3234, 3236, 3238. Off Bristol Bay, 2514-36 fathoms, stations 3251-3253, 3302 (1 quart rejected), 3303, 3306, 3501. Off Cape Menshikof, 24 fathoms, station 3296. Off Cape Strogonof, 26-32 fathoms, stations 3291-3294. Herendeen Bay. Off Cape Seniavin, 35-37 fathoms, stations 3285, 3286. Off Kudobin Islands, 36-39 fathoms, stations 3281, 3283 (1 pint rejected). Off Cape Leontovich, 18-22 fathoms, stations 3275, 3276. Off Amak Island, 19-39 fathoms, stations 3273, 3274. Off Unimak Island, 32-34 fathoms, stations 3256, 3259, 3267. Pumicestone Bay, Unalaska, 54 fathoms, station 3321. Gulf of Georgia, British Columbia, 67 fathoms, station 2863. Strait of Fuca, 48-53 fathoms, stations 3460, 3465. Washington Sound, Strait of Fuca, 48 fathoms, station 2864. Bellingham Bay, Washington, 11 fathoms, station 3612. Admiralty Inlet, Puget Sound, 40 fathoms, station 2865. Off Cape Nalacheff, Kamchatka, 39-42 fathoms, station 3781. Avacha Bay, Kamchatka, 16 fathoms, station 3642. Southeast coast of Kamchatka, 96—100 fathoms, stations 3643, 3644. Off Robben Island, Okhotsk Sea, 18-28 fathoms, stations 3646, 3647, 3649, 3650. Collected by W. H. Dall: Off Cape Sabine, 13 fathoms. Hagemeister Strait, 8—15 fathoms. Iliuliuk Harbor and Captains Harbor, Unalaska, 3-15 fathoms. Shores of Amaknak Island. Popof Strait, Shumagin Islands. Chugachik Bay, Cook Inlet, 20-60 fathoms. Other specimens in the National Museum are from: Ten miles west of Point Franklin, Alaska, 1314 fathoms (Point Barrow Expedition, types of P. dapifer Murdoch). Bering Strait sige Robert White). Lat. 66° 12’ N., long. 168° 54’ W. (Lieutenant G. M. Stoney, U.S. N.). Lat. 63° 50/ N., long. 167° 21’ W., 17 fathoms (Lieutenant G. M, Stoney, U. S. N. }e Off mouth Yukon, 3% fathoms (E. W. Nelson). Bering Island (N. Grebnitzky); some specimens found in stomach of Gadus macrocephalus. Petropavlovsk, Kamchatka (L. Stejneger). Avacha Bay (Stimpson). 40 RATHBUN PANDALUS JORDANI Rathbun. Plate 1, fig. 3. Pandalus jordani RATHBUN, Proc. U. S. Nat. Mus., XXIV, 900, 1902. Surface smooth and shining. Rostrum about one and three fourths times as long as carapace, slightly arched above the eyes, terminal two thirds ascending; slender, armed with 14 to 17 spines above, includ- ing 4 on the carapace; distal three immovable, others movable; closer to- gether above the eye; 7 to 10 immovable spines below, extending nearer to tip than superior spines; tip acuminate; the posterior of the dorsal spines lies between the middle and the anterior third of the carapace. Antennal spine strong; pterygostomian small, slender. Eyes large, pyriform. Peduncle of antennule reaching to middle of antennal scale; second and third joints subequal; flagella subequal, one and a half times as long as carapace, thickened portion of outer flagellum extending half its length beyond the antennal scale. Scale three fourths to four fifths as long as carapace, extremity of blade broadly rounded, and equally produced with the spine; antennal peduncle reaching to end of second segment of an- tennular peduncle; flagellum one fourth longer than body. Outer maxillipeds slender, not reaching end of acicle. First pair of feet a little shorter; of the second pair, the right foot extends about to end of scale, the left may be half again as long; the right carpus has 19 to 22 segments, the left 58 to 63 segments. The last three pairs of feet diminish a little in length successively, the third pair exceeding the scale slightly; their dactyli are elongate, and are contained from two anda half to two and four fifths times in their propodi. The third segment of the abdomen is compressed and its posterior half carinated, the carina interrupted by a slight lobe at the posterior third of the segment; this lobe is of varying size, at no time strong, and hav- ing a tendency to disappear in large specimens, where it may occur only as a slight unevenness in the curve seen in profile; posterior margin well produced backward, rounded, unarmed; fourth segment with posterior margin truncate, entire; sixth about twice as long as fifth and three fourths as long as seventh, which has ro to 13 lateral aculei on each side. -* Females bearing eggs taken in January and February off southern California. | Dimensions.—Ovigerous female, length 124.5 mm., length of cara- pace and rostrum 59.5 mm., of rostrum 38 mm. DECAPODS 4!I Distribution.—From Unalaska to southern California, 35 to 178 fathoms: Monterey and San Pedro, California (D. S. Jordan, 1880). Taken by the A/batross at the following localities : Iliuliuk Harbor, Unalaska, 85, 68 fathoms, station 3311 (1 specimen), station 3313 (1 specimen). Gulf of Georgia, British Columbia, 67 fathoms, station 2863 (1 specimen). Strait of Fuca, 98-152 fathoms, stations 3447-3456, 3458, 3459, 3461. Off Strait of Fuca, 142 fathoms, station 3457. Flattery Bank, Washington, 77 fathoms, station 3673. Off Tahwhit Head, Washington, 178 fathoms, station 3076. Near Flattery Rocks, Washington, 171 fathoms, station 2866. Off Grays Harbor, Washington, 48-58 fathoms, stations 2870, 3046 (abundant), 3047 (abundant), 3048. Off Columbia River, 55-68 fathoms, stations 2882 (abundant), 3066. Off Tillamook Rock, Oregon, 46 fathoms, station 3064. Off False Tillamook, Oregon, 62 fathoms, station 3090. Off Siletz Bay, Oregon, 77 fathoms, station 3059. Off Heceta Bank, Oregon, 93 fathoms, station 3080. Off Point Arena, California, 51 fathoms, station 3251. Off Bodega Head, California, 167 fathoms, station 3170. Off Tomales Point, California, 57 fathoms, station 3175. Off Drake Bay, California, 35 fathoms, station 3155. Monterey Bay, California, 56 and 68 fathoms, stations 3666, 3671. San Luis Obispo Bay, California, 77 fathoms, station 3197. Off Santa Cruz Island, California, 155 fathoms, station 2949 (type locality). Southwest of San Nicholas Island, California, 158 fathoms, station 2898. Distinguished from P. dorealis, which has a similar rostrum, by the reduction of the abdominal lobe or hump, and the absence of posterior median spines on third and fourth segments. PANDALUS MONTAGUI TRIDENS Rathbun. Plate 11, fig. 2. ? Pandalus annulicornis RICHTERS, Abh. Senck. Natur. Gesell., XIII, 405, 1884. Bering Sea, N. of Akutan Pass, 70 fath.; Plover Bay. Pandalus montagui RATHBUN, The Fur Seals and Fur-Seal Islands of the North Pacific Ocean, Pt. III, 557, 1899. Pandalus montagui tridens RATHBUN, Proc. U. S. Nat. Mus., XXIV, 901, 1902. Distinguished from the three foregoing species by its non-carinated ab- domen devoid of a hump. Rostrum slender, from one and a half to one and four fifths times the length of carapace. Dorsal spines 10 to 12 in 42 RATHBUN number, all movable, and situated, 3 to 5 on the carapace, and the re- mainder on the basal half of the rostrum. Posterior spine just in front of middle of carapace. Inferior spines 6 or 7, rigid. Distal two thirds of rostrum ascending; tip trifid. Outer margin of acicle slightly arcuate, blade truncate at tip, spine stout, reaching to or beyond the end of blade. The outer maxillipeds may fall short of or exceed the scale. Carpus of right foot of second pair divided into 20 to 28 segments, of left foot into about 74 segments. Dactyli of last three pairs short, being contained from five and a half to seven and a half times in their propodi. Last pair reaching end of acicle or beyond. No median spines on abdomen; third segment produced moderately backward at the middle, margin broadly rounded at that point. Lateral aculei of telson 5 to 7. Dimensions.—Female, station 2842, length 104 mm., length of cara- pace and rostrum 48.5 mm., of rostrum 30.2 mm. The largest specimen on the Pacific coast was taken off Point Arena, California, in 239 fathoms. It measures 110 mm. long, carapace and rostrum 53 mm., rostrum 34 mm. Distribution.—From Bering Sea to Point Arena, California, 3-351 fathoms. Taken by the A/darross at the following localities: Off Pribilof Islands, 25-184 fathoms, stations 3482-3491, 3494, 3496, 3497» 350° 3504, 3505, 3536, 3549, 3544, 3552, 3554, 3558-3561, 3602, 3605, 3611, 3637. Off Rat Islands, Aleutian Islands, 55 fathoms, station 3599. Off Unalaska, 59-351 fathoms, stations 3236, 3315, 3317, 3319, 333° 3331. Pumicestone Bay, Unalaska, 35—54 fathoms, stations 3321, 3322 (1 quart rejected at each station). Tliuliuk Harbor, Unalaska, 85 fathoms, station 3311. Off Akutan Island, 36-91 fathoms, stations 2842 (type locality, abun- dant), 3546, 3548. Off south entrance to Akutan Pass, 45 fathoms, station 2843. Northwest of Unimak Island, 43-70 fathoms, stations 3258, 3262. Unimak Pass, 34-56 fathoms, stations 3220, 3222, 3223. Northeast of Unimak Island, 38 fathoms, station 3265. Davidson Bank, 42-43 fathoms, stations 2845, 3215. South of Unimak Island, 42—61 fathoms, stations 3216, 3217. Southwest and south of Sannak Islands, 38-44 fathoms, stations 2846, 3213, 3214 (abundant). North of Amak Island, 39 fathoms, station 3273. Off Kudobin Islands, 36-53 fathoms, stations 3279, 3281, 3282. DECAPODS 43 Shumagins, 21-69 fathoms, stations 2847, 2849-2852. Off Shumagin Bank, 138 fathoms, station 3339 (1 peck rejected). Off the Trinity Islands, 67-159 fathoms, stations 2853, 3341. Portlock Bank, 51~—230 fathoms, stations 2856 (abundant), 2857, 2858. Off Queen Charlotte Sound, British Columbia, 204 fathoms, station 2861. Near Flattery Rocks, Washington, 171 fathoms, station 2866. Off Point Arena, California, 239 fathoms, station 3349. Small specimens were collected by Dr. Dall at Bay of Islands, Adak, Nazan Bay, Atka, and Iliuliuk Harbor and Captains Harbor, Una-. laska, in 3 to 80 fathoms. Puget Sound (T. Kincaid). Berg Bay, Glacier Bay (Harriman Expedition). Juneau, 20 fathoms (Harriman Expedition). I have separated this form from /. montagui Leach of the North Atlantic on account of its somewhat longer rostrum, which varies from one and a half to one and two thirds times the carapace, the dorsal spines terminating behind the middle of the rostrum, while in typical P. monta- gui the rostrum is from one and two fifths to one and a half times the carapace, and its dorsal spines reach to or in front of its middle. In PB montagui the tip is bifid; in the subspecies usually trifid. PANDALUS LEPTOCERUS Smith. Pandalus leptocerus SMITH, Proc. U. S. Nat. Mus., 11, 437, 1881; Bull. Mus. Comp. Zool., x, 58, 1882; Rept. U. S. Commr. of Fish and Fisheries for 1882, 367 [23], pl. v, fig. 1, 1884.—A. MILNE EDWARDs, Recueil Planches Expéd. Travailleur, pl. XXII, 1883. An elongate species. Surface of carapace and abdomen roughened with short and irregular transverse, punctate ridges, which give rise to very short, bristle-like hairs. Rostrum from about one and a third to nearly twice as long as the rest of the carapace, and curved very slightly upward; armed above with 11 to 13 movable spines, of which one is near the tip and usually only two on the carapace proper, while a considerable space back of the terminal spine is unarmed; below 6 to 8 immovable spines. The posterior dorsal spine is considerably in front of the middle. Outer maxillipeds provided with an exopod ; the endopod falls short of the end of the antennal scale, and the first pair of feet are correspond- ingly shorter than the maxillipeds. Right leg of second pair reaches about to end of first pair; carpus has 5 segments, proximal half undi- vided, and followed by 3 subequal segments, each about as long as broad, together equal to terminal segment; chela about half as long as carpus. The left leg of second pair has 52 to 64 segments in the carpus; the 44 RATHBUN merus and distal end of ischium are also faintly segmented. The last three pairs of legs are very slender, and have slender, nearly cylindrical dactyli, which have only a few small spinules beneath near the base, and are contained between two and three times in their propodi. Abdomen more slender than in P. montagui tridens. Otherwise as in that species. Dimensions.—Female (off Cape Ann, Massachusetts), length 98 mm., carapace and rostrum 43.5 mm., rostrum 27.4 mm. Distribution.—Very common on the Atlantic coast of America from Nova Scotia to Chesapeake Bay in 15 to 321 fathoms. One specimen only has been taken in the Pacific, by the Albatross, off Shumagin Bank, Alaska, 138 fathoms, station 3339. PANDALUS PLATYCEROS Brandt. Pandalus platyceros BRANDT, in Middendorff’s Reise in den dussersten Norden und Osten Sibiriens, Band 11, Zool., Theil 1, 123, 1851.—STIMPSON, Jour. Boston Soc. Nat. Hist., vi, 501 [61], 1857. Pandalus pubescentulus DANA, Crust. U. S. Expl. Exped., 1, 568, 1852; pl. XXXVI, fig. 8, 1855.—STIMPSON, Jour. Boston Soc. Nat. Hist., v1, 501 [61], 1857.—KINGSLEY, Bull. Essex Inst., x, 63, 1878.—SMITH, Rept. Prog. Geol. Survey Canada, 1878-79, B, p. 214.—HOLMEs, Occas. Papers Calif. Acad. Sci., VII, 210, Igoo. Body stout. Carapace covered with a dense, short pubescence. Rostrum one and a half to one and two thirds times the carapace, pro- vided with a broad entire laminar crest on each side. Median crest arising half-way back on the carapace, armed with 14 to 17 spines ex- tending to middle of rostrum, the anterior 1 to 5 fixed, the rest movable; usually a solitary spine not far behind the acute tip; lower limb armed with 7 or 8 fixed spines, diminishing gradually in size; the basal tooth very large. Posterior part of rostrum deflexed, anterior half or two thirds ascending, tip above level of carapace. Antennal spine very strong; pterygostomian small, but well marked. Eyes large, pyriform; cornea in alcohol light greenish; ocellus black. Antennular peduncle reaching two fifths the length of acicle, second and third joints subequal; outer flagellum one half longer than carapace, its basal half thickened; inner flagellum a little longer; outer basal scale reaching nearly to end of first joint. Antennal scale four fifths to seven eighths as long as carapace, oblong, extremity of blade subtruncate, slightly exceeded by the spine; peduncle reaching nearly to the middle of the third segment of antennular peduncle; flagellum stout at base, equaling or exceeding length of body. Maxillipeds stout, reaching nearly or about to end of antennal scale; first pair of feet to middle of terminal joint of maxillipeds. Right leg of DECAPODS 45 second pair reaching to end of maxillipeds, carpus 8- to g-jointed, the first joint as long as the next 5 or 6, which are subequal, and twice as long as the last joint; propodus about half as long as carpus; fingers two thirds as long as palm. Left leg of second pair two fifths again as long as right; carpus divided into 27 or 28 joints, the first and last joints about twice as long as the adjoining segment; intervening segments varying a little in size, but those of the distal half a little larger; pro- podus as long as last three segments of carpus; fingers three fourths as long as palm. Third to fifth legs stout, the third reaching about the length of its dactyl beyond the acicle, the fifth reaching to middle of acicle; dactyli contained from 4 to 6 times in their propodi. Abdomen slightly more than twice as long as carapace, smooth, non- carinate; third segment very slightly produced backward in the middle; sixth segment short and stout, one and a half times as long as wide; seventh one and a half times as long as sixth, with six spinules on each side. Dimensions.—Ovigerous female (station 3129), length 214 mm., length of carapace and rostrum 113 mm., of rostrum 68 mm. Distribution.— Unalaska (Brandt) to off San Diego, California. Strait of Fuca at Dungeness, Washington (Dana). The specimens in the National Museum from north of the Strait of Fuca were found in shal- low water, while in the Strait and along the coast of California the spe- cies occurs in considerable depths, from 48 to 266 fathoms. Taken at the following localities by the Albatross : Klinkwan, Prince of Wales Island, Alaska. Karta Bay, Alaska. Metlakatla, Annette Island, Alaska. Mary Island, Alaska. Otter Bay, Pender Island, British Columbia. Port Angeles, Washington. Strait of Fuca, 100-151 fathoms, stations 3445, 3449-3451, 3458. Washington Sound, Strait of Fuca, 48 fathoms, station 2864. Off Bodega Head, California, 167 fathoms, station 3170. Off Farallone Islands, California, 191 fathoms, station 3161. Off Point Ano Nuevo, 203 fathoms, station 3208. Off Monterey Bay, 65-204 fathoms, stations 3125, 3129. Off Point Carmel, 162 fathoms, station 3183. Off Cape San Martin, 218 fathoms, station 3189. Off Point Conception, 145 fathoms, station 2893. Off Santa Cruz Island, 150-266 fathoms, stations 2946, 2948, 2949. Off San Diego, 124 fathoms, station 2935. Killisnoo, Alaska (Northern Trading Co.). Lituya Bay, in stomach of halibut (W. H. Dall). Hood Canal, near Union, Washington, 20 fathoms (R, W, Doane). 46 RATHBUN PANDALUS HYPSINOTUS Brandt. Plate 11, fig. 5. Pandalus hypsinotus BRANDT, in Middendorff’s Reise in den iussersten Norden und Osten Sibiriens, 11, Zool., I, 125, 1851. Unalaska. Body stout. Rostrum a little (one sixth or one seventh) longer than the carapace, which is strongly arched dorsally. The median crest reaches nearly to the posterior margin; the superior median spines are movable, occupy the anterior three fifths of the carapace, and extend an equal distance on the rostrum, in all numbering 17 to 22. The distal portion is strongly ascending and unarmed, except at the tip, which is oblique and armed with three immovable spines; the lower margin is furnished with 7 to 9 fixed spines, the posterior ones very large and hooked; lateral carine of moderate prominence. Antennal spine of moderate size, acuminate; pterygostomian spine small. Eyes pyriform, nearly as broad as long; cornea in alcohol bluish; ocellus darker. Antennular peduncle reaching not quite to the middle of the acicle; second joint a little longer than the third. Outer flagellum two thirds as long as carapace, the posterior five sixths thickened; inner flagellum about one fourth longer than outer; basal scale lobiform, not reaching end of eye. Antennal scale about four fifths as long as carapace, oblong, extremity obliquely subtruncate, spine very slightly longer. Peduncle reaching to end of second segment of antennular peduncle; flagellum nearly as long as the body. Maxillipeds in large specimens reaching a little in advance of the acicle; first pair of feet nearly to end of acicle. Right leg of second pair reach- ing about to the end of the rostrum, carpus with 19 or 20 segments, the first and last of which are about equal to the three adjoining segments; propodus as long as the last four segments of the carpus, fingers two thirds the length of palm. Left leg of second pair half again as long as right; carpus composed of about 60 segments, the first and last subequal to the three adjoining segments; propodus a little longer than the last three segments of the carpus; fingers nearly as long as palm. The merus and the ischium of the second pair are also more or less segmented. The third pair of legs extends beyond the acicle by the length of the dacty- lus and half or more of the propodus; the fifth pair reaches beyond the middle of the acicle. Dactyli of last three pairs, in the female, contained from two and one fourth to four times in their propodi. In the male the propodi of the third and fourth pairs are a little shorter, are recurved (in the third pair strongly so), and are narrowed at the extremity. DECAPODS 47 Abdomen two and a third times as long as carapace, smooth, non- carinate, third segment very slightly produced backward in the middle; sixth segment twice as long as wide; seventh one and a half times as long as sixth, with six spinules on each side. | Dimensions.—Ovigerous female (Herendeen Bay), length 133 mm., length of carapace and rostrum 61 mm., of rostrum 31 mm. Distribution.—From Bering Sea to Strait of Fuca and Kurile Islands, 3 to 20 fathoms. Unalaska (Brandt). Specimens have been examined from the following localities: Cape Etolin, Nunivak, 8 fathoms; Hagemeister Island, 8 to 15 fathoms; Nazan Bay, Atka, 10 to 16 fathoms; Unalaska, 3 to 6 fath- oms; Iliuliukk Harbor, Unalaska, 3 to 1o fathoms; Port Levashef, Unalaska; Popof Strait, Shumagins, 6 fathoms; Shahafka Cove, Ka- diak; Chugachik Bay, Cook Inlet, between 20 and 60 fathoms; Sitka Harbor, 15 fathoms (W. H. Dall). St. Michael, Norton Sound (E. W. Nelson). Herendeen Bay, Alaska, fine specimens, abundant (A/ba‘ross). Kadiak, dredged (W. R. Coe, Harriman Expedition), “ very bright col- ored.” Port Angeles, Washington (Adbatross). Portage Bay, Alaska (Lieutenant H. E. Nichols, U.S. N.). Bering Island (L. Stejneger and N. Grebnitzky). Petropavlovsk, Kamchatka (L. Stejneger). Rakovaya Bay, Avacha Bay, Kamchatka (A/batross). Off Iturup Island, Kurile Islands, 18 fathoms (A/ba/ross station 3653). PANDALUS DAN Stimpson. Pandalus dane STIMPSON, Proc. Boston Soc. Nat. Hist., v1, 87, 1857; Jour. Boston Soc. Nat. Hist., v1, 502 [62], pl. XXI, figs. 6, 7, 1857. Opposite Fort Townsend in Puget Sound. Pandalus franciscorum KINGSLEY, Proc. Acad. Nat. Sci. Phila., 1878, 94. San Francisco. A rather stout species. Surface finely pitted. Rostrum a little longer than the carapace (from one fifth to one eighth longer), distal two thirds directed obliquely upward. Median dorsal spines 10 to 12, movable, about half of them on the carapace, the posterior spine a little behind the middle; terminal half of rostrum unarmed above, apex trifid, lower margin 6- to 8-spined, the spines diminishing anteriorly ; lateral carinze moderately prominent. Antennal spine acuminate; pterygostomian spine small, but well marked. Antennular peduncle reaching about half the length of acicle, last two joints subequal; outer flagellum about seven tenths length of carapace, 48 RATHBUN basal three fourths thickened; inner flagellum one fourth or one third longer than outer; basal scale reaching only to middle of first segment, its distal outer angle almost a right angle. Antennal scale from three fourths to five sixths as long as carapace, tapering to the extremity, the laminar part of which is rounded, and much exceeded by the spine; peduncle reaching to end of second segment of antennular peduncle; flagellum equaling or exceeding the length of the body. Maxillipeds reaching nearly to end of acicle; first pair of feet to mid- dle of terminal joint of maxilliped. The right leg of the second pair may slightly exceed or fall short of the tip of the rostrum; merus slightly annulated; carpus with from 18 to 21 joints, those of the proximal half very indistinctly marked, the last joint as long as the two preceding; pro- podus the length of the last four carpal segments, palm longer than digits, Left leg of second pair one third or nearly half again as long as right leg; merus and distal portion of ischium faintly annulated; about 60 carpal segments, hand and fingers much as in the right leg. Third leg of female reaching beyond the rostrum by one third or one fourth the length of the propodus. Fourth leg reaches one third or one half the length of the propodus of the third pair, while the fifth may reach beyond the middle of the propodus of the fourth. Dactyli of the last three pairs contained about four times in their propodi. The third and fourth pairs of legs of the male differ from those of the female in having shorter propodi, that of the third scarcely overreaching the rostrum; the propodus of the third is also recurved instead of A Fic. 13. Pandalusdane(x 2). Station straight and narrow at the extremity, 2865. a. Acicle. 6, Third leg of %. c. , . : : 2 Third leg of ¢. forming an oblique margin against which the dactylus folds; the dactyli of the last three pairs are contained about three times in their respective propodi. Abdomen two and a half times as long as carapace, smooth, non-car- inate, third segment very slightly produced backward ih the middle; sixth segment one and two thirds as long as wide; seventh one and a half times as long as sixth, and with six spinules on each side. Dimensions.—Adult female (San Francisco market), length 110 mm., length of carapace and rostrum 50 mm., of rostrum 26.5 mm. Distribution.— From Sitka, Alaska, to San Francisco, California. DECAPODS AQ Specimens have been examined from: Sitka, Alaska, 10 fathoms (Harriman Expedition). ; Ward Cove, Revillagigedo Island, Alaska (Dr. T. H. Streets, U. S. N.). Off Cape Beale, Vancouver Island, 24 fathoms (Adbatross, station 2881). Otter Bay, Pender Island, British Columbia (A/ba¢ross). Strait of Fuca, 40-97 fathoms (Adbatross, stations 3443, 3462, 3464, 3465). Admiralty Inlet, Puget Sound, 40 fathoms (A/batross, station 2865). Puget Sound (T. Kincaid). Port Angeles and Port Townsend, Washington (A/batross). Port Orchard, Washington (O. B. Johnson). San Francisco, California (D. S. Jordan). San Francisco market (R. E. C. Stearns). PANDALUS STENOLEPIS Rathbun. *. Plate 11, fig. 4. Pandalus stenolepis RATHBUN, Proc. U. S. Nat. Mus., XXIV, goI, 1902. Differs from P. dane: (t) In the stouter eyes, the transverse diameter being as great as the axial diameter. (2) Inthe more slenderantennal scale. This scale has a concave outer margin, and the distal Se half of the blade is very narrow and filiform, , Be sheet shonin narrower than the adjacent thickened portion. = Acicle (x 2). Station 3464. (3) The first pair of feet is longer, reaching almost to the extremity of the maxillipeds. (4) The third, fourth, and fifth pairs of feet in the male, while shorter than in the female, as in P. dane, do not differ in shape from those of the female, as in the older species. (5) In the tip of the rostrum, usually 2-spined, though occasional specimens have 3 spines. Dimensions.—Adult female (station 3464), length 80 mm., length of carapace and rostrum 37.2 mm., of rostrum 21 mm. Distribution.—From the Aleutian Islands to Oregon, 27 to 125 fath- oms. Taken at the following stations: Pumicestone Bay, Unalaska, 59 fathoms, station 3319. Tliuliuk Harbor, Unalaska, 85 fathoms, station 3311. Off Akutan Island, Alaska, 36 fathoms, station 3546. Unimak Pass, Alaska, 34 fathoms, station 3220. Northwest of Unimak Island, Alaska, 43 fathoms, station 3262. Southwest of Sannak Islands, Alaska, 41 fathoms, station 3213. Off Cape Beale, Vancouver Island, 34 fathoms, station 2879. Off Cape Flattery, Washington, 27-40 fathoms, stations 2873, 2874. 50 RATHBUN Strait of Fuca, 37-125 fathoms, stations 3443, 3445, 3451, 3452, 3458, 3459, 3461, 3462, 3464 (type locality), 3593. Off Alsea River, Oregon, 42 fathoms, station 3085. Off Heceta Bank, Oregon, 68 fathoms, station 3078. Heceta Bank, Oregon, 42-50 fathoms, stations 2886, 2887, 2889. Granite Cove, Port Althorp, Alaska (W. H. Dall). PANDALUS GURNEYI Stimpson. Plate 11, fig. 6. Pandalus gurneyi STIMPSON, Ann. Lyc. Nat. Hist. N. Y., X, 128, 1871. Mon- terey, Calif. The species which I take to be /& gurneyi is very near P. dane. Our adult specimens are smaller than /. danz ; rostrum longer, being from one and a half to one and two thirds longer than the carapace. Median dorsal spines 8 or 9, rather distant, ventral spines 9 or 10. An- tennular peduncle only two fifths as long as acicle; the flagella are sub- equal and one and a half times as long as carapace, the thickened portion of the outer one being a little over half the entire length; the basal scale is rounded, not angled. Antennal scale as long as carapace, flagellum exceeding length of body. Maxillipeds reaching three fourths the length of antennal scale, first pair of feet reaching nearly as far. Right leg of second pair extends to tip of acicle, carpal segments 17; left leg one third longer than right, carpal segments about 45. As the last three pairs of feet are about the same length as in P. dane, it follows that in the female the third pair does not reach as far beyond the rostrum as in that species, or fails to reach the end of the rostrum. In the male the last three pairs of legs are shorter than in the female, and the propodus of the third pair is slightly re- curved and narrowed at the extremity, forming a margin against which the dactylus closes; this is, if I mistake not, the condition which Stimpson de- scribes as ‘ subcheliform.’ Sixth segment of abdomen one and a half times | as long as wide; seventh less than one and a half times as long as sixth, 5 spinules on each side. Otherwise as in 2. dane. Dimensions.— Ovigerous female (station 2961), length 77.5 mm., length of carapace and rostrum 38.5 mm., of rostrum 25 mm. Fic. 15. Pandalus gurneyz. Third leg of $ (xX 2). Station DECAPODS 51 Distribution.—Southern California, 9 to 55 fathoms (rare). Taken at the following stations by the Albatross : Monterey Bay, 9 fathoms, station 3130. Off Santa Barbara, 21 fathoms, station 2961. Off San Miguel Island, 55 fathoms, station 2959. Off Santa Cruz Island, 3o fathoms, stations 2944, 2945. Off Santa Rosa Island, 52 fathoms, station 2956. Genus Pandalopsis Bate. KEY TO THE SPECIES OF PANDALOPSIS, A. Rostrum with spines on distal half of upper margin . . . dispar. A’. Rostrum without spines on distal half of upper margin. B. Dorsal spines not continued to middle of carapace. . . ampla. B’. Dorsal spines continued to middle of carapace. C. Palm of chela more than one and a half times as long as fingers, Rostrum less than twice as long as carapace proper . aleutica, C’. Palm of chela less than one and a half times as long as fingers. Rostrum more than twice as long as carapace Pome os eS RED 4 ee ee 8 ff ONgirosiris. PANDALOPSIS AMPLA Bate. Pandalopsis amplus BATE, Challenger Rept., xxIv, 671, pl. Cxv, fig. 3, 1888. Pandalopsis ampla F AXON, Mem. Mus. Comp. Zool., XVIII, 155, 1895. Surface remotely punctate. Rostrum one and a third to one and nine tenths times as long as the rest of the carapace (in small specimens it may be two and a half times the carapace), slightly ascending, slightly arched above the eyes. Median crest occupying the anterior two thirds of the carapace, armed with 7 to 13 movable spines, of which 3 to 5 are on the carapace and in front of the middle, the anterior spine considerably behind the middle of the rostrum. There is also a subterminal fixed spine; and occasionally two subterminal spines—both above, or one above and one below. Greater part of the rostrum unarmed above. Lower margin armed with 13 to 16 slender spines, larger toward the base of the rostrum. Suborbital spine slender, prominent. Pterygos- tomian spine short and slender. Eyes very stout, ocellus rudimentary. The peduncle of the anten- nula extends to the middle or nearly to the middle of the antennal scale ; the second segment is twice as long as the third; inner flagellum at least half as long as the body; outer flagellum one fourth longer than inner, thicker at the base, but gradually tapering. The peduncle of the an- tenna does not reach quite to the end of the second segment of the antennular peduncle; flagellum one and a third times the length of the 52 RATHBUN body. Scale four fifths to eight ninths as long as carapace; blade broadly rounded at the tip and exceeded by the spine. The maxilliped falls considerably short of the tip of antennal scale, but its penultimate segment reaches to or beyond the end of the anten- nular peduncle. The ischium of the first pair of feet is dilated in a thin, broad laminar inferior projection, which is anteriorly lobiform; the terminal segment overlaps a little that of the maxilliped. The feet of the second pair are equal; the carpus has 20 to 24 segments; the right and left carpi may or may not have an equal number of segments; the chela is as long as the five adjacent segments of the carpus. The third, fourth, and fifth pairs of feet are slender and similar, and armed with slender spines; while they diminish regularly in length from the third to the fifth, their propodi increase in length proportionally; the dactyli are short and con- tained from five to six times in their respective propodi. The third pair overreaches the acicle by the length of the dactylus and at least half the propodus. The third segment of the abdomen is moderately produced backward in the middle, forming a lobe in the posterior margin; the sixth segment is nearly two and a half times as long as wide, and about two thirds as long as the seventh; this has 5 to 8 spinules on each side, of which the anterior is just in front of the middle. Dimensions.— Length 164 mm., length of carapace and rostrum 85.7 mm., of rostrum 57.5 mm. Distribution.—¥rom Washington to Mexico; off Monte Video; 309- 984 fathoms: Off Monte Video, 600 fathoms (Challenger, type locality). Off Acapulco, 660 fathoms, station 3418, and near Tres Marias Islands, Mexico, 676 fathoms, station 3424 (Adbatross, Faxon). Off Cortez Bank, California, 984 and 776 fathoms, stations 2919 (one young) and 3627. Off San Diego, 822 and 623 fathoms, stations 2983 (abundant) and 2929. Off Sea Lion Rock, Washington, 877 and 859 fathoms, stations 3074 and 3075 (abundant). PANDALOPSIS ALEUTICA Rathbun. Plate 1, fig. 1. Pandalopsis aleutica RATHBUN, Proc. U. S. Nat. Mus., XXIV, 901, 1902. Surface of carapace covered with a short and soft pubescence. Bran- chial region traversed by a curved longitudinal ridge. Rostrum one and es ee ey DECAPODS 53 one seventh to one and a half times the length of the rest of the cara- pace, ascending. Anterior two thirds of carapace furnished with a median crest. Median spines 8 to 13, four to six of which are behind the orbits, the insertion of the posterior spine being at the middle of the carapace; the anterior spine is behind the middle of the rostrum; this is exclusive of a subterminal spine. Inferior spines 8 to 12. The peduncle of the antennula extends a little past the middle of the antennal scale; the second segment one and a half times as long as third; outer flagellum two thirds as long as body, inner flagellum shorter. Peduncle of antenna reaching to end of second antennular segment; scale three fourths to four fifths as long as carapace, broader behind than in P. ampla; flagellum one and a half times the length of the body. The outer maxillipeds extend either to the tip or nearly to the tip of antennal scale; the first pair of pereiopods overreach the penultimate segment of the maxilliped; second pair subequal, extending beyond acicle, carpal segments 18 to 21, chela equal in length to five and a half or six of the adjoining segments of the —— ° Fic. 16. Pandalopsis carpus; palm more than one and a half times as long as aieutica.'Chela of 9 fingers. ‘There is very little difference in the length of ae nee the third, fourth, and fifth pairs of feet; the third pair reaches beyond the acicle by the length of the dactylus and half the propodus; the dactyli are contained about five and a half times in their propodi. . The pleon is much like that of P. ampia, the pleura of the second seg- ment are narrower than in P. amf/a; the sixth segment is shorter, only twice as long as wide. For the rest, as in 2. ampla. Dimensions.—Adult female, length 132 mm., length of carapace and rostrum 61.5 mm., of rostrum 33 mm. Distribution.—Over one hundred specimens were taken by the Adja- tross at station 3480, off Seguam, Aleutian Islands, 283 fathoms (type locality). North of Rat Islands, Aleutians, 270 fathoms, station 3785. A finities.—Besides its resemblance to P. ampla, this species is also similar to P. /amelligera (Brandt), from Kamchatka, but differs in the fewer dorsal spines, in the longer feet of the first pair, and in the nar- rower pleura of the second segment of the pleon. PANDALOPSIS LONGIROSTRIS Rathbun. Pandalopsis longirostris RATHBUN, Proc. U. S. Nat. Mus., XXIV, 902, 1902. Male.—Surface smooth. Rostrum a little more than twice as long as the carapace proper, strongly ascending, and continued backward in a 54 RATHBUN carina behind the middle of the carapace, armed with 9 movable spines, four of which are on the carapace (the hinder one inserted very slightly behind the middle) and five on the base of the rostrum; 1 subterminal immovable spine ; lower margin armed with 11 immovable spines. Antennular peduncle extending to middle of F ndalopsis lon carapace rf Patan o> ee. be Acide (xB). & Chala (x 33). scale. Scale as long as irostris. Station 3316. a. Side of ema carapace. Antennal pe- duncle reaching to middle of second antennular segment. Maxillipeds reaching almost to end of scale, very stout and hairy. The first pair of pereiopods overlaps the basal fourth of the last joint of the maxilli- peds; second pair extending beyond acicle by length of chela, carpus of 21 joints, chela equal to the seven adjoining segments, fingers almost as long as palm; third pereiopods extending beyond the acicle by the length of the dactylus and two thirds of the propodus. Sixth segment of abdomen two and a half times as long as wide; telson broader than in P. aleutica. Dimensions.— Male, length 112 mm., carapace and rostrum 59 mm., rostrum 41 mm. Distribution.—Off— Niuliuk Harbor, Unalaska, 309 fathoms, station 3316, Albatross, 2 males (one without rostrum). PANDALOPSIS DISPAR Rathbun. Plate 1, fig. 2. Pandalopsis dispar RATHBUN, Proc. U. S. ‘Nat. Mus., XXIV, 902, 1902. Surface very finely and closely punctate. Rostrum two to two and a half times the length of the rest of the carapace, arched over the eyes, the remainder slightly ascending. Median crest occupying two thirds the length of the carapace, posterior spine at the anterior third, spines 16 to 21, three or four of which are on the carapace, spines closely placed on the arch, distant on the remainder of the rostrum. Inferior spines 9 to 15, extremity bifid or sometimes trifid. Antennal spine long and slender; pterygostomian spine minute. Eyes very large, with a very small but distinct ocellus outside the corneal area. Antennal peduncle reaching two fifths the length of antennal scale; DECAPODS 55 third segment but little shorter than second; outer basal scale a narrow lobe; outer flagellum one third longer than the body; inner flagellum one half as long as the outer, Antennal scale a little shorter than the carapace, tapering distally; extremity of blade obliquely rounded and exceeding the spine; peduncle reaching end of second segment of anten- nular peduncle ; flagellum one and a half times length of body. The outer maxillipeds reach to the distal fifth or sixth of the antennal scale. The first pair of feet overlap the proximal third of the terminal joint of the maxilliped. Second pair subequal, overreaching the acicle a little; carpus composed of from 26 to 33 segments. Third to fifth pairs of feet nearly equal, the third reaching beyond the acicle by length of dactylus and one half or more of propodus, their propodi increasing in length from the third to the fifth pair, while the dactyli increase in reverse order; so that while the dactylus of the third pair may be contained three and a half or four times in the corresponding propodus, the dactylus of the fifth pair is contained seven or eight times in its propodus; the spines of the meral and carpal segments are replaced by bristles on the propodi; dactyli subentire, although there may be a few small very appressed spinules at the base of the concave surface. Abdomen two and four fifths to three times as long as the carapace (exclusive of rostrum); third segment slightly compressed, its posterior margin produced in a short subacute lobe. Sixth segment nearly three times as long as wide and three fourths as long as seventh; seventh with five to seven spinules on each side. Outer branch of tail-fan about as long as the telson; inner branch much shorter. Dimensions.— Length of female 181 mm., length of carapace and rostrum roo.5 mm., length of rostrum 73.5 mm, Length of female (sta- tion 3675) 211.5 mm. Distinctive characters.— The spines distributed along the whole upper margin of the rostrum, the unequal dactyli of the third to fifth pairs of feet, and the inequality of the branches of the swimming-fan easily dis- tinguish this species from the preceding. Distribution.—From Bering Sea to Washington, 53 to 351 fathoms, at the following stations of the Albatross : Bering Sea, west of Pribilof Islands, 184 fathoms, station 3489. Chernofski Harbor, Unalaska, 109 fathoms, station 3324 (type locality). North of Unalaska, 351, 350 fathoms, stations 3330, 3331. Between Unga and Nagai Islands, Shumagins, 110 fathoms, station 2848. Off the Trinity Islands, 159 fathoms, station 2853. Clarence Strait, Alaska, 322 fathoms, station 3077. Queen Charlotte Sound, British Columbia, 238 fathoms, station 2862. 56 RATHBUN Off Strait of Fuca, 142 fathoms, station 3457. Strait of Fuca, 53-136 fathoms, stations 3446-3449, 3451, 3452, 3456, 3458-3460, 3596, 3597- ) Puget Sound, 82-135 fathoms, stations 3067, 3068. Off Tahwhit Head, Washington, 1478 fathoms, station 3076. Stations 3675, 3676 (locality not given), 110 and 122 fathoms, Family H7/PPOL YTIDZ. Genus Hippolyte Leach. HIPPOLYTE CALIFORNIENSIS Holmes. Distribution.—From Sitka, Alaska, to San Diego, California. Speci- mens are in the National Museum from Sitka, 10 fathoms (Harriman Expedition, one specimen); Barclay Sound, British Columbia (Adarross, one specimen); Puget Sound (T. Kincaid, several specimens) ; Bodega Bay, California (determined by S. J. Holmes); San Diego, California (Albatross). The Sitka specimen, about 24 mm. long, has on the rostrum 3 teeth above on basal half, below 3 near the middle and 1 near the tip. The example from Barclay Sound has 2 teeth above on basal half, and 1 near the tip, below 2 near the middle and 1 near the tip. In a lot of eleven specimens from Puget Sound, the dorsal teeth are usually 2 (in one case 3) on basal half of rostrum, and 1 or none near tip. In the few individuals from San Diego the rostral teeth are typical. Genus Hippolysmata Stimpson. HIPPOLYSMATA CALIFORNICA Stimpson. Distribution.—From Santa Barbara to San Diego, California. Genus Spirontocaris Bate. (Includes Heptacarpus Holmes.) KEY TO THE SPECIES OF SPIRONTOCARIS, A. One or more supraorbital spines present. B. Rostrum subcircular. Median spines of carapace compound or formed by short transverse rows of small ones 3 OF 4 supra- orbital spines. prionota. B’, Rostrum not subcircular, usually elongate. Median spines of carapace simple, or not formed by transverse rows of small spines. Not more than 2 supraorbital spines. C. First to third abdominal segments laterally acute or spinous. D. First and second abdominal segments armed with slender spines. Rostrum narrow ... . + + grenlandica, DECAPODS S7 D’. First and second abdominal segments laterally acute. Ros- trum deep . . lamellicornis. C’. First to third abdominal segments laterally rounded, not acute. D. Two supraorbital spines. E. Rostrum longer than the remainder of the carapace and with along slender tip .. . bispinosa. E’. Rostrum shorter than the remainder of the carapace. F. Rostrum not reaching end of antennular peduncle truncata. F’. Rostrum reaching beyond end of antennular peduncle. G. Antennular scale not reaching middle of second seg- ment of peduncle. H. Dorsal spines all in front of middle of carapace Sica. H’. Dorsal spines continued posterior to middle of carapace . . . snyderi. G’. Antennular scale reaching beyond middle of second segment of peduncle. H. Dorsal spines not reaching to posterior third of carapace. J. Upper limb of rostrum gradually diminishing in width from the orbit to the tip . . phippsii. J’. Upper limb of rostrum arcuate, widest in the middle. | K. Rostrum extending only to end of antennular peduncle, deep, usually bifid at tip ochotensis. K’. Rostrum extending nearly to end of antennal scale, less deep, tipacute . . . . dalli. H’. Dorsal spines continued to posterior third of cara- pace. J. Midrib of rostrum terminating in a spine which projects well beyond lower limb of rostrum. K. Eyes large, pyriform. Spine of antennal scale extending beyond lamellar portion Lljeborgit. K’. Eyes of moderate size, subcylindrical. Spine of antennal scale not reaching beyond lam- ellar portion. . . ~ + « murdochi, J’. Midrib of rostrum terminating in a spine which does not project beyond lower limb of rostrum. K. Upper margin of carapace and rostrum in 9 convex. Third abdominal segment in ¢ in profile not projecting behind fourth segment ; arcuata, K’. Upper margin of carapace and of rostrum in 9 separated bya depression. Third abdominal segment in ¢ in profile projecting in a horn- like process behind fourth segment . spina. D’. One supraorbital spine. 58 RATHBUN E. Rostrum less than twice aslong astheeye washingtoniana. E’. Rostrum twice or more than twice as long as the eye. F. Antennular scale shorter than first segment of peduncle vicina. F’, Antennular scale longer than first segment of peduncle. G. Fifth segment of abdomen not armed with a spine on either side . . - affinis. G’. Fifth segment of abdomen armed with a spine on either side. H. Rostrum longer than the rest of the carapace unalaskensis. H’. Rostrum no lenger than the rest of the carapace polaris. A’. No supraorbital spine or spines. B. Rostrum about as long as or longer than the rest of the carapace. C. Third, fourth, and fifth segments of abdomen carinated, the carina on each segment terminating ina sharp spine . . Jdarbata. C’. Third, fourth, and fifth segments not all carinated nor ending in a sharp spine. D. Terminal half (at least) of rostrum devoid of spines above. E. Third abdominal segment with an angle or hump, in profile, toward the posterior end. F. More than 3 dorsal teeth, one or more in front of eyes. G. Sixth abdominal segment less than twice as long as wide. Rostrum deep, one fourth as deep as long carinata, G’. Sixth abdominal segment more than twice as long as wide. Rostrum more slender. H. Maxilliped with epipod. Scale at base of antennula extending beyond first segment. . . flexa. H’. Maxilliped without epipod. Scale at base of an- tennula not reaching beyond, or only slightly beyond, first segment . . . - . gracilis. F’. Three dorsal teeth, none in front of eyes . . ridens. E’, Third abdominal segment smoothly rounded, without angle or hump. F, One or more superior rostral spines in front of eyes. G. No pterygostomian spine . . . . . « « stylus. G’. A pterygostomian spine . . - « « amabilis. F’, No superior rostral spine in front of eye . « Sabricii. D’. Terminal half of rostrum with spines (in part at least). E. Terminal third of rostrum unarmed above and below biunguis. E’, Terminal third of rostrum not entirely unarmed. F. Sixth abdominal segment longer than seventh . decora., F’, Sixth abdominal segment shorter than seventh. G. Maxilliped exceeding acicle. H. Rostrum straight above. Epipods on maxillipeds and first two thoracic feet. . . . paludicola. DECAPODS 59 H’. Rostrum concave above. a Sta on maxillipeds and first foot only. . ee ae So ROSETE. G’. Maxilliped not exceeding acicle. H. Third abdominal segment with a lobe (in profile), which is in the form of a hook inthe ¢, of a hump in the 9. 8 to 12 dorsal spines gaimardii belcheri. H’. Third segment without a lobe (in profile) in the ¢. J. Rostrum with more than 8 spines above . “yi. J’. Rostrum with 8 or fewer than 8 spines above. K. Fourth abdominal segment with a spine on either sides, f' 04. - + « suckleyt. K’. Fourth abdominal segment without spine. L. Sixth segment barely twice as long as high. M. Maxillipeds reaching just beyond middle of acicle . . . « » camtschatica. M’. Maxillipeds reaching nearly to end of aticles ss. . . kincaid, L’. Sixth segment more ‘than twice as long as ee - . vownsendi. B/. Rostrum shorter than the rest of the. carapace. C. Upper and lower limbs of rostrum deep and with convex margins. D. Upper limb of rostrum deepest above the eye . . macilenta. D’. Upper limb narrow above the eye . . . macrophthalma. C’. Upper and lower limbs of rostrum not both convex. D. Rostrum elongate, reaching beyond the middle of the an- tennal scale. E. Upper margin of rostrum concave. F. Fingers of first pair-of chelipeds less than one third as long as palm. No pterygostomian spine. No spine on fourth segment of abdomen. . . Jbrachydactyla, F’, Fingers of first pair of chelipeds about half as long as palm. A pterygostomian spine or spinule. A spine or spinule on fourth segment of abdomen masxillipes. E’. Upper margin of rostrum straight. F. Antennal peduncle reaching end of antennular peduncle pita. F’. Antennal peduncle reaching end of second segment of an- tennular peduncle. . . « sitchensis. D’. Rostrum short, not reaching beyond the middle of the an- tennal scale. E. Rostrum not reaching as far as the cornea . . . faylori. E’. Rostrum reaching as far as or beyond the cornea. F. Rostrum not reaching the second segment of antennular peduncle. G. Rostrum with superior margin strongly convex over the eyes, extremity straight. . . . . . avina. G’, Rostrum with superior margin not strongly convex over the eyes, but nearly straight. 60 RATHBUN H. Maxilliped withexopod . . ... . pusiola. H’. Maxilliped without exopod. : J. Antennal scale about same length as, or shorter than, telson .. . . brevirostris. a% Antennal scale longer than telson . . palpator. F’. Rostrum reaching second segment of antennular pe- duncle. G. Rostrumstraight .. . eins «te Aaordenans. G’. Rostrum arched over the eye. H. Fourth segment of abdomen with lateral spinule. Maxillipeds reaching, or nearly reaching, end of aticle “% °« . . cristata. H’. Fourth segment of abdomen unarmed. Maxillipeds reaching only to distal third of acicle . stoneyi. SPECIES OF SPIRONTOCARIS, ARRANGED ACCORDING TO THEIR EXOPODS AND EPIPODS. A. One or more supraorbital spines present. B. Third maxilliped with exopod and epipod. C. First thoracic foot with epipod. . : - Sua. C’. First and second thoracic feet with epipods . bispinosa, snyderi. C’, First, second, and third thoracic feet with epipods prionota, lamellicornis, spina, arcuata, murdochi, truncata? , liljeborgit, phippsti, ochotensis, dalli. B’. Third maxilliped without exopod but with epipod. C. First thoracic foot with epipod . . - vicina. C’. First and second thoracic feet with epipods polaris, unalaskensis. C”. First, second, and third thoracic feet with epipods mca washingtoniana. _B”. Exopods and epipods unknown . . oh ele) 5 Ml A’. No supraorbital spine or spines. B. Third maxilliped with exopod and epipod. C. Thoracic feet without epipods darbata, biunguis, macrophthalma. C’. First thoracic foot with epipod fabricié (usually), suckleyé (usually). C”, First and second thoracic feet with epipods Jabricii (sometimes), gaimardii bel- cheri, townsendi, suckleyi (sometimes). C’’’, First, second, and third thoracic feet with epipods pusiola, herdmani, stoneyi, avina, macilenta, B’. Third maxilliped without exopod but with epipod. C. Thoracic feet without epipods decora, tridens, stylus, maxillipes, brachydactyla, camtschatica, kincaids. C’. First thoracic foot with epipod . . . . moseri, sitchensis. C’’, First and second thoracic feet with epipods fiexa, picta, paludicola. C’’, First, second, and third thoracic feet with epipods carinata, palpator, brevirostris, taylori, cristata, ia a ~~ = DECAPODS 61 B”, Third maxilliped without exopod or epipod. Thoracic feet without epipods RS cont tle bts bern ate gracilis, B’’, Exopods and epipods unknown . . . . . . = amabilis, layi. SPIRONTOCARIS PRIONOTA (Stimpson). Hippolyte prionota STIMPSON, Proc. Acad. Nat. Sci. Phila., 153, 1864.— KINGSLEY, Bull. Essex Inst., XIV, 127, pl. Il, fig. 9, 1883.—SHARP, Proc. Acad. Nat. Sci. Phila., 117, 1893. Spirontocaris prionota WALKER, Trans. Liverpool Biol. Soc., XII, 277, 1898. Spirontocaris Drionata HOLMES, Occas. Papers Calif. Acad. Sci., vil, 206, 1900. To Kingsley’s figure one must add 2 or 3 supraorbital spines arranged in a longitudinal series. While 3 seems to be the normal number, the anterior one is often reduced and sometimes wanting. Distribution.—¥rom Bering Sea to Monterey, California: . Dutch Harbor, Unalaska, and Kadiak (Harriman Expedition, W. R. Coe). Collected by W. H. Dall at Cape Etolin, Nunivak Island, 8 fathoms; Captains Harbor, Unalaska, 9 and 80 fathoms; Coal Harbor, Unga, 8-9 fathoms; Belkofski Bay, 15-25 fathoms; Chiniak Bay, Kadiak; Chugachik Bay, Cook Inlet, 20-60 fathoms. Dredged by the A/Zazross in Bristol Bay, Alaska, 744% and 10% fathoms, stations 3232 and 3233; off North Head, Akutan Island, 72 fathoms, station 2842; Unimak Pass, 34 fathoms, station 3220; North of Bird Island, Shumagins, 21 fathoms, station 2850; Admiralty Inlet, Puget Sound, 40 fathoms, station 2865. Puget Sound (T. Kincaid). Pacific Grove, California (J. O. Snyder). Bering Island, 2-12 fathoms, some in stomach of Gadus macrocephalus (N. Grebnitzky). . Puget Sound (Stimpson); Marmot Isles, Alaska, 45 fathoms (Sharp) ; Monterey, California (Holmes). SPIRONTOCARIS GRCENLANDICA (J. C. Fabricius). Astacus Grenlandicus J. C. FABRICIUS, Syst. Entom., 416, 1775; Entom. syst. auct. et emend., II, 484, 1793 (grenlandicus). Cancer aculeatus O. FABRICIUS, Fauna Greenlandica, 239, 1780. Alpheus Aculeatus SABINE, in Supplement to Appendix of Parry’s [First] Voyage, p. CCXXXVII, pl. II, figs. g and Io, 1824. Hippolyte aculeata J. C. Ross, in John Ross, Appendix to Narrative of a Second Voyage in Search of a North-West Passage, II, p. Ixxxiii, 1835. Hippolite armata OWEN, in Zoology of Capt. Beechey’s Voyage [of the Blossom], Crustacea, p. 88, pl. XXvVII, fig 2, 1839 (9 ). Hippolite cornuta OWEN, op. cit., p. 89, pl. XXVIII, fig. 2, 1839 (4 ). Hippolyte grenlandica Miers, Ann. Mag. Nat. Hist. (4), XxX, 62 (12), 1877.—SMITH, Trans. Conn. Acad. Arts Sci., v, 85, pl. X, fig. 2, 1879. Spirontocaris grenlandica WALKER, Trans. Liverpool Biol. Soc., XII, 276, 1898.—HOLMES, Occas. Papers Calif. Acad. Sci., VII, 236, 1900. The number of spines on the abdomen is the same in the two sexes, 62 RATHBUN but there is some individual variation. The usual number of spines is one on the second and sixth segments and two on each of the other segments. Distribution.—Arctic coast of America; Bering Sea to Puget Sound; Kamchatka; Okhotsk Sea; Atlantic coast of America from Greenland to Narragansett Bay, Rhode Island, 1-72 fathoms: Berg Bay, Glacier Bay, Alaska (Harriman Expedition). Dredged by the Albatross from off Cape Menshikof, Bering Sea, to the Aleutian Islands and Portlock Bank, Alaska, in 16 to 72 fathoms; at the unusual depth of 283 fathoms, off Seguam, Aleutians, a lot of large specimens, the largest 9 measuring 77 mm., the largest 4 67 mm.; Strait of Fuca and Puget Sound, 40-48 fathoms; off Kamchatka, 12 and 42 fathoms, stations 3780 and 3781; Avacha Bay, Kamchatka, 16 fathoms, station 3642; Rakovaya Bay, Avacha Bay; off Robben Island, Okhotsk Sea, 10 fathoms, station 3645. Various localities from Kadiak westward along the Aleutian Islands, in 3-25 fathoms (W. H. Dall). Puget Sound (T. Kincaid). Avacha Bay and Petropavlovsk, Kamchatka (L. Stejneger). Bering Island, among Laminaria, and Solovarennaja Bay, Petropavlovsk, Kamchatka, 1ro—12 fathoms (N. Grebnitzky). Arctic Ocean (Stimpson). SPIRONTOCARIS LAMELLICORNIS (Dana). Hippolyte lamellicornis DANA, Proc. Acad. Nat. Sci. Phila., 1852, 24; Crust. U. S. Expl. Exped., 1, 567, 1852, pl. XXXVI, fig. 6, 1855.—STIMPSON, Jour. Boston Soc. Nat. Hist., v1, 498, 1857.—KINGSLEY, Bull. Essex Inst., X, 62, 1878. - Spirontocaris lamellicornis WALKER, Trans. Liverpool Biol. Soc., XII, 277, 1898.—HOLMES, Occas. Papers Calif. Acad. Sci., VII, 208, 1900. This species, though resembling strongly S. spina, is at once separated by the acuteness of the lateral margins of the first to third abdominal segments, which in SS. sfina are broadly rounded. The rostrum is about three fourths as long as the rest of the cara- pace, and does not exceed the antennal scale, although it may exceed the blade Fic. 18. Spirontocaris lamellicornis. Side Of the scale. The spine of the scale ex- of carapace of ¢ (x 18). Station346. tends beyond the blade to a distance equaling or exceeding the distal width of the blade. The dactyli of the last three pairs of feet are longer than in S. sfima, those of the last pair being half the length of their propodi; they are armed with spinules so minute that the segment appears entire in comparison with 5S. spina. Dimensions.— 2, length 63 mm., carapace 23 mm. DECAPODS 63 Distribution.—This species occurs sparingly from Unalaska to Point Arena, California; 9-77 fathoms. It has been taken by W. H. Dall at Captains Harbor, Unalaska, 9 fathoms; Port Etches, 12-18 fathoms; Sitka Harbor, 15 fathoms. By the Albatross at Gulf of Georgia, British Columbia, 67 fathoms, station 2863; Strait of Fuca, 53 fathoms, station 3460; Bellingham Bay, Washington, 11 fathoms, station 3612; off Destruction Island, Washington, 32 fathoms, station 2869; off Grays Harbor, 48-58 fathoms, stations 2870, 3046— 3048; off Columbia River, 68 fathoms, station 2882; off Oregon, 38-77 fathoms, stations 3057-3059; off Point Arena, California, 51 fathoms, Station 3351. SPIRONTOCARIS SPINA! (Sowerby). Plate 111, fig. 5. Cancer spinus SOWERBY, British Miscellany, 47, pl. XXIII, 1805 (deste Steb- bing). Alpheus spinus LEACH, Edinb. Encyc., VII, 431, 1814; Philadelphia reprint, VII, 271. Alpheus Spinus LEACH, Trans. Linn. Soc. London, XI, 347, 1815. Hippolyte Sowerbai LEACH, Malac. Pod. Brit., pl. XXxXIX, 1817. Hippolite sowerbei J. C. Ross, in John Ross, Appendix to Narrative of a Second Voyage in Search of a North-West Passage, II, p. lxxxiii, pl. B, fig. 2, 1835. Hippolyte spinus WHITE, List Crust. Brit. Mus., 76, 1847.—BELL, Hist. Brit. Crust., 284, 1853.—SMITH, Trans. Conn. Acad. Arts Sci., v, 68, 1879. Hippolyte spina STIMPSON, Proc. Acad. Nat. Sci. Phila., X11, 34 (103), 1860; Ann. Lyc. Nat. Hist. N. Y., X, 126, 1871. Spirontocaris spinus BATE, Challenger Report, XXIv, 596, pls. CvI and CvII, 1888 (part).—-RATHBUN, The Fur Seals and Fur-Seal Islands of the North Pacific Ocean, Pt. III, 556, 1899 (part). There is considerable variation, in this species, in the height of the carapace in proportion to its length; in the eyes, which may be widely pyriform or smaller and subcylindrical; in the length of the outer maxillipeds (in none of the Pacific specimens do the maxillipeds reach the end of the acicle, while in many Atlantic ones they do); in the carination and the length of the | Fic.19. Spirontocaris spina. i i ; Side of f¢ : spine of the third abdominal segment. ae 1In” regard to spina vs. spinus, Stimpson says (Ann. Lyc. Nat. Hist. N. Y., x, 126, 1871): ‘‘ Sowerby, by the name he gave to this species, doubtless had refer- ence to a spine, or the backbone: in Latin spina, not spinus. Spinus is not an adjec- tive, and means only the sloe-tree, which could scarcely have been intended.” While spinus has another signification, from omfvoc, the name of a small bird, yet it was without doubt used by Sowerby to call attention to the spine or spines of the animal. 64 RATHBUN Ross (/oc. cit.) probably represents the ¢ of SS. sfina, but the shape of the rostrum is inaccurate; both upper and lower lamine should have more convex margins. Distribution.—Circumpolar. Arctic Alaska, Bering Strait, Bering Sea, Aleutian Islands, and Alaska Peninsula to Lituya Bay, 5-91 fathoms; Atlantic Ocean southward to Massachusetts Bay, 5-90 fathoms; northern Europe: Taken by the 4/atross at the following stations: Off the Pribilof Islands, 41-62 fathoms, stations 3439, 3442, 3482, 3483, 3485; 3595, 3549, 3544, 3554, 3560, 3561. Off Bristol Bay, 30 fathoms, station 3302. Off Cape Strogonof, 30 fathoms, station 3293. Off Kudobin Islands, 36 fathoms, station 3280. Off Akutan Island, 56-91 fathoms, stations 2841, 2842, 3548. Pumicestone Bay, Unalaska, 35 fathoms, station 3322. Northwest of Unimak Island, 81 fathoms, station 3257. South of Unimak Island, 42 fathoms, station 3217. Between Bird and Nagai Islands, Shumagins, 35 fathoms, station 2851. Collected by Dr. Dall at: Bering Strait, 12 fathoms. Bay of Islands, Adak, 9-16 fathoms. Nazan Bay, Atka, 10-16 fathoms. Captains Harbor, Unalaska, 9-80 fathoms. Port Levashef, Unalaska. Lituya Bay, 6-9 fathoms. Off Point Hope, Arctic Alaska, 25 fathoms (U.S. R. S. Corwin). Lorenz Bay and Plover Bay (Richters). SPIRONTOCARIS ARCUATA Rathbun. Plate 1, fig. 4. Spirontocaris spinus RATHBUN, The Fur Seals and Fur-Seal Islands of the North Pacific Ocean, Pt. 111, 556, 1899 (part). Spirontocaris arcuata RATHBUN, Proc. U. S. Nat. Mus., XxIv, 893, 1902. On the Pacific coast, associated in part with S. spina, is a very closely allied species, easily mistaken for S. sfima, but apparently distinct. In the adult 9, the upper line of carapace and ros- trum in profile forms a single curve, without the sinus shown in S. sfina, the rostrum is on a higher level than in that species, the rostral spines larger and more distinctly marked; the Side of corapace of Oc 1), Sta, Posterior lobe of the third abdominal segment tion 2864. shorter and broader; the sixth segment con- siderably shorter, being less than one and a half times as long as wide, DECAPODS 65 while in S. spina it is more than one and a half times as long as wide; the maxillipeds reach to the tip of the antennal scale; the dactyli of the third to fifth pairs of feet are shorter than in S. spina, that of the last pair being contained at least three times in the propodus, while in S. spina the dactylus of the last pair is contained only two and a half times in its propodus. The males of this species and of S. sfina are more difficult of deter- mination. The rostrum has the midrib more strongly curved upward, the upper limb deeper and with more convex superior outline than in S. spina. The same differences in the abdomen exist as in the females of the two species, but in a lesser degree. Dimensions.— Q, length 53.8 mm., length of carapace and rostrum 20 mm., of rostrum 8 mm. Distribution.—F¥rom Pribilof Islands to Strait of Fuca; 3-350 fathoms. A more southerly range than that of S. spina. Harriman Expedition.—Kadiak, 5 fathoms (W. R. Coe); Berg Bay, Glacier Bay; Juneau, 20 fathoms. Collected by the A/datross : Off Pribilof Islands, 48-150 fathoms, stations 3484, 3486, 3500, 3561, 602. of Cape Menshikof, 24 fathoms, station 3296. Off Cape Strogonof, 26 fathoms, station 3291. Northeast of Unimak Island, 24 fathoms, station 3266. Northwest of Unimak Island, 43 fathoms, station 3262. Unimak Pass, 34 fathoms, station 3220. Off North Head, Akutan Island, 72 fathoms, station 2842. Off south entrance to Akutan Pass, 45 fathoms, station 2843. Off Aektok Island, 54 fathoms, station 2844. Davidson Bank, 42 fathoms, station 2845. North of Unalaska, 350 fathoms, station 3331. Iliuliuk Harbor, 93 fathoms, station 3335. Off Makushin Bay, Unalaska, 61 fathoms, station 3318. Southwest of Sannak Islands, 41 fathoms, station 3213. 15 miles south of Sannak Islands, 44 fathoms, station 2846. Off Shumagin Bank, 138 fathoms, station 3339. Off Falmouth Harbor, Shumagins, 48 fathoms, station 2847. Shumagins, 21-58 fathoms, stations 2850-2852. Off Trinity Islands, 159 fathoms, station 2853. Admiralty Inlet, Puget Sound, 40 fathoms, station 2865. Washington Sound, Strait of Fuca, 48 fathoms, station 2864 (type locality). Strait of Fuca, 40-152 fathoms, stations 3443-3446, 3451, 3454, 3455, 3458, 3459, 3461, 3462, 3464, 3465, 3596. Dr. W. H. Dall has collected the species at 16 localities along the Aleutian Islands and eastward to Port Etches in 3-80 fathoms. 66 RATHBUN SPIRONTOCARIS MURDOCHI Rathbun. Plate 11, fig. 6. Hippolyte spinus MURDOCH, Report Internat. Polar Exped. to Point Barrow, Alaska, 140, 1885. Not Cancer spinus Sowerby. Spirontocaris murdochi RATHBUN, Proc. U. S. Nat. Mus., XXIV, 893, 1902. Very near S. 4feborgi and S. spina. Female stout. Rostrum three fourths as long as carapace, not reach- ing tip of antennal scale. Carapace cristate, except on posterior fourth, and furnished with 3 or 4 large teeth. Midrib of rostrum nearly horizontal; tip acute; upper limb with convex upper margin, armed with 20 or 22 small irregular teeth ; lower limb, also with alan eee Bis rypeversee mee. convex margin, deeper than the upper, and fur- (X 38). Station 3650 nished with 1 to 4 small teeth near the extremity. Two supraorbital spines, one antennal, and one pterygostomian spine, all well developed. Eyes of moderate size, slightly pyriform, the width of antennular peduncle and half its scale. Antennular peduncle extending three fifths the length of the antennal scale; second segment twice as long as third; basal scale reaching nearly to end of second segment; thickened portion of outer flagellum reaching about to tip of antennal scale. Antennal peduncle reaching slightly beyond the first segment of the antennular peduncle; scale narrow-ovate, about as long as the rostrum, its spine reaching about as far forward as the blade, Outer maxillipeds rather broad and reaching nearly to tip of acicle. First pair of feet extending a little beyond antennal peduncle, the second pair beyond acicle, fifth pair nearly to tip of maxilliped; dactyli of last three pairs long and slender, that of last pair half as long as propodus. Abdomen not carinate; third segment produced well backward; fourth provided with a lateral spine; sixth three fourths as wide as long, and about three fifths as long as the seventh, which has 3 pairs of lateral spinules. Male.—The male differs from the female in the same manner as in S. liljeborgii; it is smaller and slenderer than the female, rostrum and anten- nules longer, dorsal teeth much reduced. Dimensions.— 2, length 46.6 mm., length of carapace and rostrum 17 mm., of rostrum 7.5 mm. Distribution.— Arctic coast of Alaska; Kamchatka; Okhotsk Sea. Rare. ‘Taken at the following localities: Lat. 71° 02/ oo” N., long. 157° 46’ oo” W., 19 fathoms, 1 4 (U.S. R. S. Corwin). DECAPODS 67 ae west of Point Franklin, 1314 fathoms, 3 ¢ (Point Barrow Expe- ition). Off oe Sabine, 12 fathoms, 1 9 (W. H. Dall). 15 miles off Cape Krusenstern, 14 fathoms, 1 9 (W. H. Dall). Rakovaya Bay, Avacha Bay, Kamchatka, 1 9 (Adbatross). Off Robben Island, east coast of Sakhalin, Okhotsk Sea, 28 fathoms, I ovigerous ? , type (4dbatross station 3650). The species differs from S. Uijeborgii in its lower carapace, shorter (in the ¢ ) and less ascending rostrum, smaller eyes, shorter spine of antennal scale (in S. 4jeborgii the spine extends considerably beyond the blade), longer dactyli of third to fifth pairs of feet, longer abdomen, and stouter sixth segment. From S. spina it differs in the lower carapace and less ascending rostrum, in the lesser advancement of the lower limb of the rostrum, smaller eyes, shorter spine of scale, shorter and broader lobe of third abdominal segment, which is not carinated, longer dactyli of third to fifth pairs of feet (in S. spina the dactylus of the fifth pair is only one third length of propodus). SPIRONTOCARIS TRUNCATA Rathbun. Spirontocaris truncata RATHBUN, Proc. U. S. Nat. Mus., XXIV, 894, 1902. Allied to S. sfina. Median carina extending nearly to the posterior margin of the carapace, convex, and armed with 4 spines. Rostrum sub- triangular, widest at the extremity, about three fifths as long as the carapace, reaching end of second antennular segment, midrib curving upward as in S. spina, upper margin with 1 spine at its middle, extremity with 7 spines, 2 above and 4 below the midrib, Supraorbital spines 2, equal, large, one ,dn® Signe ears we behind the other but scarcely above it, well sepa- % °# Station 286. rated. Anterior margin with 2 spines below the orbit as in S. spina. Antennular acicle reaching beyond the anterior margin of the second segment but not so far as the slender spine at the outer angle of that margin; a small spine at the middle of the anterior margin of the third segment. Antennal acicle tapering, narrow at the end, reaching one third the length of the thick antennular flagellum. Peduncle reaching beyond first segment of antennular peduncle; flagellum two thirds as long as body. Maxillipeds reaching end of antennal scale; first pair of feet to end of antennal peduncle. The propodi of the third, fourth, and fifth pairs are three times as long as their dactyli. Margins of first to third abdominal segments entire; of fourth to sixth 68 RATHBUN segments with a spine at the lower postero-lateral angle; sixth segment less than twice as long as fifth, and only a trifle longer than wide. Tel- son with four pairs of lateral spinules. Dimensions.— , length 14 mm. Type locality.—Heceta Bank, Oregon, 50 fathoms (A/datross station 2886); one specimen. Aside from the peculiar form of the rostrum, this species differs notably from .S. sfina in its subequal and more widely separated supra- orbital spines. Its habitat is also farther south than the known range of S. spina. SPIRONTOCARIS LILJEBORGII (Danielssen). fHippolyte Liljeborgit DANIELSSEN, Nyt Mag. for Naturvid., x1, 5, 1859 (brief description; Vol. XI appeared in 1861, but the separate contain- ing Danielssen’s article was issued in 1859).—-DANIELSSEN and BOECK, Nyt Mag. for Naturvid., xIx, 196 [8], plate, figs. 15-20, 1872. Hippolyte securifrons NORMAN, Rept. Brit. Assoc. Adv. Sci. for 1861, XXXI, 151 (1862); Trans. Tyneside Naturalists’ Field Club, v, 267, pl. XII, figs. 1-7, 1863.—-SMITH, Trans. Conn. Acad. Arts Sci., v, 69, 1879. Distribution.— East of Point Franklin, Arctic Alaska (lat. 71° 02’ oo” N., long. 157° 46’ 00” W.), 19 fathoms, August 24, 1884, one small male (U. S.R.S. Corwin). Known from the Atlantic coast of America, from off Nova Scotia to Delaware Bay, 27-452 fathoms; northern Europe. SPIRONTOCARIS BISPINOSA Holmes. Spirontocaris bispinosa HOLMES, Occas. Papers Calif. Acad. Sci., VII, 207, 1900. Puget Sound. Dimensions.—Ovigerous ? , length (approximate) 59.5 mm., length of carapace and rostrum 25.2 mm., of rostrum 14.8 mm. Fic. 23. Shirontocaris “ge Side of cara- Distribution. — From Strait of en ee Fuca to off San Diego, California, 13-211 fathoms. Taken by the Albatross at: Strait of Fuca, 116 and 98 fathoms, stations 3447, 3448. Puget Sound, 82 fathoms, station 3067. Off Tahwhit Head, Washington, 178 fathoms, station 3076. Off Tillamook Rock, Oregon, 29 fathoms, station 2882. Off Bodega Head, California, 167 and 62 fathoms, stations 3170, 3172. Off Farallone Islands, California, 191 fathoms, station 3161. Monterey Bay, 13-68 fathoms, stations 3132, 3134, 3666. Off Lobos Rocks, 77 fathoms, station 3184. Off San Simeon Bay, 211 and 160 fathoms, stations 3191, 3193. Off Esteros Bay, 92 fathoms, station 3194. DECAPODS 69 Southwest of San Nicholas Island, 158 fathoms, station 2898. Off San Diego, 124 fathoms, station 2935. SPIRONTOCARIS SNYDERI Rathbun. Spivrontocaris snydert RATHBUN, Proc. U. S. Nat. Mus., xxIV, 894, 1902. This species bears a curious resemblance to 5S. dispinosa, in general terms it is a dispinosa with the slender spine of the rostrum broken off; but a closer examination shows other and more radical differences. The specimens, among which are several egg-bearing fe- males, are all smaller than S. dzspinosa, but this is not absolute proof that the species is smaller, because the females of .S. disfinosa are fertile when rather small. The median spines of the carapace proper are 3 or o cM ni anones 4, instead of 2, as in 5S. dispinosa, and are larger; ° * 28) Station 2886. the last spine is at the posterior two fifths of the carapace. Between these spines and the small ones on the rostrum there is a considerable space. The rostral teeth are 5 or 6 above, 3 or 4 below. The rostrum is a little shorter than the carapace and is much the shape of that of S. bispinosa, excepting that the midrib is more rapidly ascending and ends in a short point in front of the lamine, and the upper lamina is shallower and of rather even depth throughout its length. The antennal peduncle reaches only about a third the length of the scale, in 5S. dispinosa half the length of the scale. The first pair of chelipeds reach the end of the antennal peduncle; in S. dzspinosa they are shorter. The dactyls of the third, fourth, and fifth pairs of feet, which are very long in S. dispinosa (about half as long as the propodi), are in S. suyderi a third, or less than a third, as long as their propodi. Dimensions.—Ovigerous 9, length (approximate) 28 mm., length of carapace and rostrum 9.4 mm., of rostrum 4.4 mm. Distribution.—From Puget Sound to Lower California, as follows: Puget Sound (T. Kincaid). Heceta Bank, Oregon, 50 fathoms (4/datross station 2886). Monterey Bay, California, type locality (J. O. Snyder). Near Lobos Rocks, 77 fathoms (A/batross station 3184). Off Santa Catalina Island, 47 fathoms (4/atross station 3663). Southern California (W. H. Dall). Off Cerros Island, Lower California, 44 fathoms (A/datross station 2838). SPIRONTOCARIS SICA Rathbun. Spirontocaris sica RATHBUN, Proc. U. S. Nat. Mus., XxIV, 894, 1902. Allied to S. dispinosa, but inhabiting deeper water on the coast of California. Differs as follows: The teeth of the dorsal carina begin 70 RATHBUN considerably in front of the middle of the carapace (exclusive of ros- trum); in .S. dispinosa they begin at or a little posterior to the middle. Rostrum shorter; the upper and lower laminz are narrower and extend nearer the tip; there are 9 to 14 superior teeth (in S. dispinosa 10 to 12), of which two Fic. 25. Sfirontocaris sica, Side of cara- pace of ¢ ( 1§). Station 3200. are on the carapace; 3 to 5 inferior teeth on the lamina (the same in S. dispinosa), but none on the slender termi- nal portion. The second segment of the antennular peduncle is longer than in SS, bispinosa, being three times as long as the third segment, while in SS. bispinosa it is twice as long. The outer maxillipeds are longer, reaching beyond the antennal scale; in .S. dispinosa they do not reach the end of the scale. The thoracic feet are longer and slenderer, the first pair over- reaching the antennular peduncle; in S. dispinosa they fall short of the peduncle. The last pair exceed the antennal scale by the length of the dactylus and one half the propodus; in S. dispinosa, by the length of the dactylus only. Dimensions.— 2 , length 58 mm., length of carapace and rostrum 24.8 mm., of rostrum 12.8 mm. Type locality. — Santa Barbara Channel, California, 265 fathoms (Albatross station 3200). Distribution.—Off the coast of California, from Point Arena to San Diego, in 211-464 fathoms, at 19g stations of the 4/batross. SPIRONTOCARIS PHIPPSII (Kréyer). Hippolyte Phippsii KROYER, Naturh. Tidssk., 111, 575, 1841 ( 4 ); K. Danske Vidensk. Selsk. Afhand., Ix, 314, pl. II, figs. 64-68, 1842 ( 2 ). Hippolyte turgida KROYER, Naturh. Tidssk., 11, 575, 1841 (9); K. Danske Vidensk. Selsk. Afhand., Ix, 308, pl. I1, figs. 57, 58, and pl. III, figs, 59-63, 1842 (2). . Hippolyte vibrans STIMPSON, Ann. Lyc. Nat. Hist. N. Y., X, 125, 1871 (2). Female. —Posterior spine of dorsal crest at about the middle of the carapace; 7 to 12 dorsal spines, which diminish on the rostrum; 3 or 4 oncarapace. Midrib of rostrum slightly inclined upward, nearly straight ; upper limb diminishing gradually in depth toward the tip; lower limb deeper than the upper, triangular, 4 to 7 spines on distal half; tip acute, reaching a little beyond the peduncle of the antennula. On the anterior portion of the carapace are 2 supraorbital spines, one above and a little behind the other, the lower smaller; an antennal spine; and a well- developed pterygostomian spine. The antennular scale reaches the end, or nearly the end, of the second DECAPODS 71 segment of the peduncle; the eye extends to the second segment, which, as well as the third, is very short. The antennal peduncle falls short of the middle of the scale; scale short and broad, subequal in length to the rostrum. . The maxillipeds exceed the antennal scale a little. The palm of the first pair of feet overlaps the last segment of the maxillipeds. The last three pairs of feet are rather stout, and the last pair exceeds the antennal peduncle a little. Abdomen conspicuously punctate. Male.—The rostrum is horizontal or deflexed, and very slender, and the spines are small and appressed. Peduncles of antennule more elongate than in the 2, eyes not reaching end of first segment, basal scale extending to middle of second segment. Dimensions. — Ovigerous 9: length (approximate) 37.5 mm., length of carapace and rostrum 13 mm., of rostrum 5.3 mm. Distribution.—Arctic Alaska to the Shumagins; 6-72 fathoms. Cir- cumpolar. Atlantic coast of America southward to Cape Cod; 8-125 fathoms. Northern Europe. In the collections of the U. S. National Museum are specimens ob- tained by Dr. W. H. Dall at various localities along the Aleutian Islands eastward to the Shumagins, in 6-30 fathoms; in Bering Strait, 13-17 fathoms; and in Plover Bay, Siberia, 1o—25 fathoms. Taken by the A/datross at the following stations: Pumicestone Bay, 35 fathoms, station 3322. Off North Head, Akutan Island, 72 fathoms, station 2842. Unimak Pass, 34 fathoms, station 3220. North of Bird Island, Shumagins, 21 fathoms, station 2850. to miles west of Point Franklin, Alaska, 133% fathoms (Point Barrow Expedition). Lat. 71° 02! oo” N., long. 157° 46’ oo” W., 19 fathoms (U. S. R. S. Corwin). Off Point Hope, Alaska, 25 fathoms (U.S. R. S. Corwin). SPIRONTOCARIS OCHOTENSIS (Brandt). Hippolyte ochotensis BRANDT, Middendorff’s Reise Sibir., Band I1, Zool., Theil 1, Krebse, p. 120, pl. V, fig. 17, 1851. Dorsal crest arising at about the middle of the carapace; 3 large spines on the carapace. Rostrum reaching to end of antennular peduncle; midrib ascending in its terminal portion; upper lamina con- vex above, tapering forward and backward, armed with about 6 or 7 small spines distant from those on the carapace; tip usually bifid; lower lamina deep, subtriangular, armed with 4 or 5 small spines on the anterior 2 RATHBUN half. Two spines above the eye, the posterior one above and much larger than the anterior. Outer spine of antennula reaching the end of the second segment or a little beyond it; flagella reaching only a little beyond antennal scale. Scale broad, about two thirds as long as carapace. The maxillipeds reach a little beyond the antennal scale. The tense, Side of Careamen *¢% palms of the first pair of feet extend to the last O65, | cee aes segment of the maxillipeds. The last 3 pairs of feet are stoutish, the last pair scarcely reaching the end of the anten- nal peduncle. The telson is a little more than one and a half times as long as the sixth segment, and is armed with 4 pairs of lateral spinules. In the males the carapace is flatter, the rostrum more horizontal, less upturned. Dimensions.— 2, length 40 mm., length of carapace and rostrum 13.5 mm., of rostrum 5.6 mm. Distribution. — Bering Sea to Sitka; Kamchatka; Okhotsk Sea; Japan. Taken by W. H. Dall at 14 stations from Nunivak southward and along the Aleutian Islands and Alaska Peninsula to Sitka, 5-20 fathoms. Off Bristol Bay, 74-1434 fathoms (Adarross stations 3232, 3233, 236). of eeliak Bay, 15 fathoms (A/batross station 3300). Lat. 63° 50’ oo” N., long. 167° 21’ oo” W., 17 fathoms (Lieutenant George M. Stoney, U. S. N.). . Sitka (Harriman Expedition), Bering Island (L. Stejneger). Bering Island, in stomach of Gadus macrocephalus (N. Grebnitzky). Petropavlovsk, Kamchatka, 10-12 fathoms (N. Grebnitzky). Okhotsk Sea (Brandt). Hakodate Bay, Japan (Stimpson). SPIRONTOCARIS DALLI Rathbun. Spirontocaris dalli RATHBUN, Proc. U. S. Nat. Mus., XxIv, 894, 1902. Female.—Allied to S. ochotensis, from which it is separated by few but well-marked characters. The rostrum is longer than in S. ochotensis, reaching nearly to the end of the antennal scale; the midrib is straighter, less sinuous, and terminates in a single sharp spine; the teeth on the ros- trum are 6-8 above, 3-4 below. ‘The carapace is lower. The last 3 pairs of thoracic feet are longer and more slender. The sixth segment of the abdomen is also longer than in |S. ochotensis, being more than one and a half times as long as the fifth segment. DECAPODS 73 Male.—As compared with the female, the teeth of the median carina and rostrum are much smaller and more appressed, sometimes obsoles- cent, the rostrum less deep and more horizontal; the antennular acicle does not reach the end of the second segment of ~ —, the peduncle; the spine of the antennal scale falls 5 short of the end of the blade. Dimensions. — 3 , length (approximate) 38 mm., length of carapace and rostrum 13.6 mm., of ros- trum 6 mm. Distribution.—Arctic Alaska, Aleutian Islands jig 7, spivontocaris dalli to Sitka. (x 2%). Attu. : : . Side of carapace of %. Although this species appears to be not rare &. Side of carapace of @. in Alaska, it has been collected almost exclusively by Dr. Dall, who ob- tained it at 17-stations along the Aleutian Islands and eastward to Port Etches, 6-20 fathoms; off Cape Sabine, 13 fathoms; and 15 miles off Cape Krusenstern, 14 fathoms. Sitka, 2 specimens (Harriman Expedition, W. R. Coe, collector). SPIRONTOCARIS POLARIS (Sabine). Alpheus polaris SABINE, Supplement to Appendix of Parry’s [First] Voyage, p. ccxxxviii, pl. 11, figs. 5-8, 1824. . Hippolite borealis JAMES C. Ross, in John Ross, Appendix to Narrative of Second Voyage in Search of a North-West Passage, p. Ixxxiv, pl. B, fig. 3, 1835 (3). Hippolite Bien JAMES C. Ross, of. cit., p. Ixxxv ( @ ). Hippolyte St. Pauli. BRANDT, Middendorff’s Reise Sibir., Band 11, Zool., Theil 1, Krebse, p. 118, pl. V, fig. 19, 1851. Lfippolyte cultellata NoRMAN, Rept. Brit. Assoc. Adv. Sci., 1866, p. 200 (1867) (= H. polaris, teste Norman, Museum Normanianum, III, Crus- tacea, p. 8, 1886), Hippolyte polaris SMITH, Trans. Conn. Acad. Arts Sci., v, p. 80, pl. XI, figs. 1-4, 1879. Hippolyte Amazo PFEFFER, Jahrb. Hamburg. Wiss. Anst., 111, 46, plate, figs. 7a, 7b, 1886. Hetairus gaimardii BATE, Challenger Rept., Zool., XXIV, 611, pl. CIX, fig. 2, 1888 (not Aippolyte gaimardii Milne Edwards). Hetairus tenuis BATE, op. cit., 613, pl. CIX, fig. 3. Hetairus debilis BATE, of cit., 615, pl. CIX, fig. 4. Professor Smith (/oc. cit.) sets forth the variations in the sexes, in the number of rostral spines, and in the aeulei on the telson. He states that “the disappearance of the dorsal teeth of the rostrum is evidently a character peculiar to, but not characteristic of, the adult male.” In the series of specimens from the North Pacific and Bering Sea this is not the case, as the majority of the females from those localities are devoid of superior rostral teeth. This series also exhibits other variations. The body and thoracic feet are usually stouter, the antennal scale shorter and 74 RATHBUN broader, the antennular scale, on the contrary, commonly longer than in Atlantic forms, in the 2 often reaching the end of the peduncle, and in the 4 sometimes the end of the second segment. There is, however, a lack of constancy in these characters which prevents the separation of the stout form as a distinct species; it was described by Brandt as H. S¢. faul, Again, the rostrum may be only as long as the peduncle of the antennula, or reach nearly to the end of the antennal scale; it may be of greater or less depth and acuteness. From the variations at a single locality, Bate (/oc. cit.) described three species for which he constructed the genus He/airus. Distribution.—Circumpolar. Atlantic coast of North America south- ward to Cape Cod, 10-218 fathoms. Northern Europe. Bering Sea, Okhotsk Sea, Aleutian Islands eastward to Kadiak, to a depth of 283 fathoms: Taken by the Albatross : Off Pribilof Islands, 25 fathoms, station 3558. Off Rat Islands, Aleutians, 55 fathoms, station 3599. Off Seguam, Aleutians, 283 fathoms, station 3480. Pumicestone Bay, 35 fathoms, station 3322. | Northwest of Unimak Island, 41 and 43 fathoms, stations 3259, 3262. Northeast of Cape Leontovich, 22 fathoms, station 3275. Okhotsk Sea, 10 fathoms, station 3645. Collected by Dr. W. H. Dall at: Plover Bay, East Siberia, ro—25 fathoms. Near Indian Point, Bering Strait, 17 fathoms. Various localities along the Aleutian Islands eastward to Kadiak, 3-80 fathoms. St. Paul Island, Pribilofs (William Palmer). Bering Island (L. Stejneger). Bering Island, among Laminaria (N. Grebnitzky). SPIRONTOCARIS UNALASKENSIS Rathbun. Spirontocaris unalaskensis RATHBUN, Proc. U. S. Nat. Mus., xxIv, 895, 1902. Female.—Body rather robust. Carapace carinated in its anterior half; posterior median spine situated at the anterior third of the carapace. Rostrum longer than the carapace or the antennal scale, nearly horizontal, but slightly concave above, dor- sal spines 4 or 5, equally spaced, 2 on the carapace and 2 or 3 at base of rostrum; no upper limb on distal portion, lower limb '. 28. A Z toc z nalas Z a i Ps Frc, 28. | Sptroniccarts syalaskensts. Side of carapace shallow, convex, armed with three DECAPODS 75 spines in front of middle, tip acuminate, sometimes minutely bifid. An- terior margin of carapace armed with 3 spines, one supraorbital, one antennal, and one smaller, pterygostomian. Eyes large, pyriform. . First two segments of antennules with an antero-external spine, third segment less than half as long as the second and armed with a spine at the middle of its anterior upper margin; the scale at outer base over- reaches the first segment. Outer flagellum reaching but little beyond the rostrum; inner flagellum twice as long. Antennal peduncle extending nearly to the end of the second segment of the antennular peduncle. Scale oblong, tapering, shorter than the carapace, tipped with a small spine which is exceeded by the blade. Flagellum at least two thirds as long as the body. Tip of maxilliped intermediate between rostrum and antennal scale. Carpal joint of first pair of feet reaching end of antepenult segment of maxilliped. Second and fifth pairs of feet reaching about to end of rostrum. | Abdomen ecarinate, third segment very prominent, its hinder portion extending well behind the line of the fourth segment. The sixth segment is about one and two thirds as long as the fifth, and seven ninths as long as the telson, which is armed with 5 or 6 spinules on each side. Dimensions.—A. female, soft shell, measures about 79 mm. in length; a smaller female is 60 mm. long, carapace and rostrum 26.5 mm., rostrum 14.5 mm. Distribution.— North of Unalaska, 277-351 fathoms, A/bazross stations 3315, 333°, 3331 (type locality). Variations.—In the male the rostrum is slenderer and more sinuous, the antennal flagella considerably longer. In small specimens the rostrum is relatively shorter. SPIRONTOCARIS VICINA Rathbun. Spirontocaris vicina RATHBUN, Proc. U. S. Nat. Mus., XXIV, 895, 1902. Allied to S. unalaskensis. Female.— Posterior dorsal spine at anterior third of carapace. Ros- trum longer than the carapace or antennal | scale, concave above, dorsal spines 7 or 8, of which two are on the carapace, the anterior not very near the tip, inferior spines 4, tip ig) Raoneewlne Sacer broken off in our specimens. Anterior carapace of ¢ (x 1g). Station 3316. margin 3-spined, the pterygostomian spine the smallest. Eyes large, pyriform. The antennular peduncles reach nearly to the spine of the antennal 76 RATHBUN scale; the second segment is about three times as long as the third; the basal scale falls considerably short of the second joint of the peduncle. The antennal peduncle does not reach the middle of the second segment of the antennular peduncle; scale similar to that of S. unalaskensis. Abdomen like that of the preceding species. The telson is incomplete in all the females. Male.—In the single male, the rostrum is a little shorter than the cara- pace and does not reach the end of the antennular peduncle; it is also straighter than in the female, and is armed with 6 spines above and 3 below. Dimensions—A female with rostrum and telson broken measures 39 mm. from the orbit to the end of the sixth abdominal segment. tal or slightly deflexed, Sereveen ete <6 acute, unarmed above, | furnished with 1 or 2 .. =—— S— . teeth below; lower limb “sith ——— very narrow. Antennal spine well developed, pterygostomian very small. Eyes large, pyriform. , Antennular peduncle Pe ei eaten otto foes Se extending two thirds the length of the antennal scale, second segment three times as long as third, outer basal scale suberect and not reaching end of first segment; flagella subequal in length; thickened part of outer one extending half its length beyond antennal scale. Outer margin of antennal scale a little more than two thirds as long as carapace, scale tapering, distal margin very oblique, peduncle extending quite to middle of scale and nearly to end of second segment of antennular peduncle. The outer maxillipeds extend beyond the scale by nearly half the length of their last segment. First pair of feet reaching half-way between antennal peduncle and end of scale; second pair exceeding maxilliped by the length of the propodus and the last joint of the carpus; third to fifth pairs nearly equal, the fifth pair overreaching the second pair; dactyli very slender and unarmed. Abdomen smooth; fourth segment furnished with a lateral spine; sixth segment a little less than twice as long as fifth, and shorter than seventh, which bears 3 spinules on each side. | Male.—Smaller, more slender, and has slightly longer antennule than the female. Dimensions.—Female, length 35 mm., length of carapace and rostrum 12 mm., of rostrum 3.5 mm. Distribution.—From Pribilof Islands to Oregon, 41 to 351 fathoms. Taken exclusively by the A/batross, at the following localities: Off Pribilof Islands, 60-184 fathoms, stations 3484, 3485, 3489, 3494, 3605, 3609. North of Unalaska, 165-351 fathoms, stations 3315, 3317, 333° (type locality), 3331. DECAPODS 105 Iliuliuk Harbor, Unalaska, 58-68 fathoms, stations 3310, 3313. Off Akutan Island, 72-91 fathoms, stations 2842, 3548. Northwest of Unimak Island, 81-85 fathoms, stations 3225, 3257. Off Kudobin Islands, 41 fathoms, station 3279. Between Unga and Nagai Islands, Shumagins, 110 fathoms, station 2848. Off the Trinity Islands, 159 fathoms, station 2853. Gulf of Georgia, British Columbia, 67 fathoms, station 2863. Strait of Fuca, 53-100 fathoms, stations 3443, 3445, 3446, 3460, 3596, 3597: Near Flattery Rocks, Washington, 171 fathoms, station 2866. Off Heceta Bank, Oregon, 277 fathoms, station 2890. SPIRONTOCARIS MACILENTA (Kréyer). Hippolyte macilenta KROYER, Naturh. Tidssk., 111, 574, 1841; K. Danske Vidensk. Selsk., Afh., IX, 305, pl. I, figs. 55, 56, 1842.—-SMITH, Trans. Conn. Acad. Arts Sci., V, 71, 1879. Spirontocaris mactlenta RATHBUN, The Fur Seals and Fur-Seal Islands of the North Pacific Ocean, Pt. III, 557, 1899. Distribution.—Arctic and Atlantic coasts of North America, as far south as Halifax, Nova Scotia; Bering Sea; Kamchatka; Okhotsk Sea; 16 to 100 fathoms. The following localities on the Alaskan and Asiatic coasts are repre- sented in the Museum collection: Arctic Ocean (U.S. R. S. Corwin). Bering Strait (Dr. Robert White). Lat. 66° 30/ 25” to 66° 43! oo” N., long. 167° 14/ 10” to 168° 08/ 15/4 W., 19-30 fathoms (U. S. R..S. Corwin). Bering Sea, between Matthew Island, Pribilof Islands, and Bristol Bay; 29%-39 fathoms (AZatross stations 3252, 3306, 3507, 3511, 3513; 3518, 3519). Off Kamchatka, 39-42 fathoms (A/batross station 3781). Avacha Bay, Kamchatka, 16 fathoms (A/batross station 3642). Southeast coast of Kamchatka, 100 and 96 fathoms (A/dazross stations 3643, 3644). Off Robben Island, Okhotsk Sea, 25 fathoms (4/afross station 3649). SPIRONTOCARIS MACROPHTHALMA Rathbun. Spirontocaris macrophthalma RATHBUN, Proc. U. S. Nat. Mus., XXIV, 900, 1902. Allied to S. macilenta and S. bispinosa, Female, — Carapace carinated in its anterior half, posterior spine at the anterior fifth; upper line of carapace and midrib of rostrum nearly hori- zontal, the rostrum gently ascending in its anterior portion; rostrum about three fourths or five sixths as long as the carapace, upper and lower limbs with convex margins, and widest at about the middle of their 106 RATHBUN length; upper margin armed with 10 to 14 teeth, including 2 or 3 on the carapace; lower margin with 1 to 3 spines; tip acute. A strong antennal Side view, $ (xX 2). Fic. Spirontocaris macrophthalma. Station a. ates i Doseel eles Sknanaiis penton ¢ Oc ebb spine on the anterior margin, no supraorbital nor pterygostomian spine; antero-lateral angle sharp. Eyes large, pyriform; cornez extending on the inner side almost to the base of the peduncle. Eyes reaching two thirds the length of the first antennular segment; this segment is twice as long as the second, and the second three times as long as the third; the second and third are each provided with a terminal spine; the peduncle does not reach the end of the rostrum; the thickened part of the outer flagellum exceeds by half its length the antennal scale; inner flagellum half again as long as outer; the basal scale does not quite reach the end of the first seg- ment; it has a strong lobe on its proximal outer margin. The peduncle of the antennz extends to the end of the second segment of the anten- nulz and the middle of the scale; the flagellum is one and a third times the length of the body. The blade of the scale exceeds the spine con- siderably, and is most advanced toward its inner margin. The outer maxillipeds are slender and reach midway between the end of the antennal peduncle and the end of the scale. The first pair of feet reach just beyond the base of the scale; the second pair just beyond the end of the scale; of the carpal joints, the second is greater than the first, the first plus the second equals the third, the fourth equals the seventh, the fifth is greater than the sixth, the fifth plus the sixth exceeds a little the seventh. The last three pairs of feet are long, fragile, and unarmed; DECAPODS 107 the last pair may extend beyond the antennal scale by the length of the dactylus and two thirds of the propodus. The first four segments of the abdomen are unarmed; the third pro- duced moderately backward in the middle; fifth with a spine at the infero-posterior angles; sixth with a spine at the infero-posterior and supero-posterior angles; sixth nearly twice as long as fifth; telson about as long as sixth segment, with 5 or 6 pairs of lateral spinules; extremity with a pair of long median spines, a longer pair of submedian spines, and a pair of short outer spines. Male.—The males exhibit the usual differences from the females in being more slender, in the longer antennular flagella, and in the abdominal appendages. Dimensions.—Female, length 62.6 mm., length of carapace and rostrum 24 mm., of rostrum 11 mm. Distribution.—¥From the north coast of Unalaska eastward and south- ward to Point Sur, California, 178 to 636 fathoms. Taken by the Albatross at the following stations : North of Unalaska, 399 and 350 fathoms, stations 3329, 3331. Off Davidson Bank, 280 fathoms, station 3337. South of Sannak Islands, 483 fathoms, station 3210. Clarence Strait, 322 fathoms, station 3077. Off Queen Charlotte Sound, British Columbia, 204 fathoms, station 2861. Off Tahwhit Head, Washington, 178 fathoms, station 3076 (type locality). Off Destruction Island, Washington, 516 fathoms, station 3343. Off Sea Lion Rock, Washington, 636 and 477 fathoms, stations 3070, 3073. Off Cascade Head, Oregon, 345 fathoms, station 3347. Off Heceta Bank, Oregon, 277 fathoms, station 2890. Off Point Arena, California, 455 and 239 fathoms, stations 3348, 3349. South of Farallone Islands, California, 391 and 217 fathoms, stations 3104, 3105. Off Pigeon Point, 296 fathoms, station 3112. Off Monterey Bay, 418-581 fathoms, stations 3126, 3127, 3670. Monterey Bay, 278 fathoms, station 3669. Off Point Sur, 298 fathoms, station 3187. A ffnities.—Resembles the preceding species, S. macilenta, but differs notably in the much larger and more reniform eyes, the longer rostrum, of which the upper limb is narrowed at its base and the lower limb is less deep, in the larger dorsal spines and the shorter scale. From S. bispinosa at once distinguished by the absence of a supraorbital spine, of the long, slender process of the rostrum and of the spine at the middle of the carapace. The sixth segment of the abdomen is longer and more slender than in S. dzspinosa. 108 RATHBUN Family ALPHEIDZ,, Genus Alpheus Fabricius. ALPHEUS DENTIPES Guérin. Alpheus dentifes GUERIN, Exp. Scient. Morée, part. Zool., 39, pl. XXvII, fig. 3, 1832. Alpheus clamator HOLMES, Occas. Papers Calif. Acad. Sci., vi1, 182, 1900, and synonymy. Distribution.—Farallone Islands, California, to San Bartolomé Bay, Lower California. Mediterranean; Cape Verde Islands; Bermudas; Porto Rico; Cuba; Key West. ALPHEUS BELLIMANUS Lockington. Distribution.—From Monterey to San Diego, California, Chile (Cou- tiére). ALPHEUS BARBARA Lockington. Habitat.—Santa Barbara, California. According to Coutiére, probably the same as 4. macrocheles (Hail- stone). ALPHEUS CALIFORNIENSIS Holmes. Habitat.,—San Pedro, California. ALPHEUS EQUIDACTYLUS Lockington. Distribution.— Monterey to Santa Barbara, California. According to Coutiére, this is d/pheopsis trispinosus (Stimpson). Genus Betzus Dana. BETZUS HARFORDI Kingsley. Distribution.—Point Arena to Catalina Island, California, BETZ US LONGIDACTYLUS Lockington. Distribution.—San Pedro to San Diego, California. BETZUS HARRIMANTI sp. nov. Female, with eggs.—Carapace compressed, upper line nearly hori- zontal; frontal margin nearly straight, with a broad, shallow, almost im- perceptible median sinus, and a deeper sinus just outside the eye. Basal scale of the antennules broad at base (the breadth of each equaling the interspace), narrowing distally, and somewhat scythe-shaped, curving slightly inward toward the extremity, which reaches the distal third of DECAPODS 109 the second joint; second joint about one and a half times as long as the third; inner flagellum about one fourth longer than the carapace; outer flagellum about two thirds the length of the inner dh and becoming much smaller at the middle, the distal EEE half very slender. Antenne with a strong spine below the base of the acicle; peduncle slightly exceeding that of the antenna; scale with a broad terminal spine, which reaches the end of the antennular peduncle, and ex- ceeds the blade, from which it is separated by a short narrow slit; flagellum nearly twice the length of the : = carapace. Maxillipeds reaching a little past the mid- rimant one Dorsal view dle of the terminal segment of theantennal peduncle. , Carpus and chela of sec- Chelipeds subequal, similar, of very moderate size; chela of first pair (x 28). merus with rounded angles, the distal end widened, length about two and a half times breadth, outer surface with a broad oblique sulcus, a trans- verse groove at the supero-distal angle, behind which the upper margin ends abruptly, but does not terminate in a spine; surface granulate, lower surface granulo-spinulous. Carpus small, rounded. Hand narrow- oblong, somewhat compressed, finely scabrous, margins rounded, the length not more than one half greater than that of the preceding joints combined. Fingers fitting close together, the pollex narrowly conical and twice as wide at base as the dactylus, which is subcylindrical; the tips are sharp and cross each other; the prehensile edges are subentire, very finely denticulate, that of the pollex convex except at the tip. The first joint of the carpus of the second pair of feet is about as long as the three following combined; the third and fourth are equal, the second a little longer than either; the fifth twice as long as the fourth, and slightly shorter than the palm, which is subequal to the fingers. The propodi of the remaining feet have a row of six or seven spines beneath; the dactyli are over a third the length of the propodi and very acuminate. The postero-lateral angles of the fourth and fifth abdominal segments are rounded, of the sixth blunt. The distal end of the peduncle of the uropods bears a pair of spines; a spine near the outer angle of the uropods. Color.—Light green. Dimensions.—Female, length of body to tip of telson 26.6 mm.; length of carapace 10 mm.; length of cheliped 17.5 mm.; length of palm 6 mm.; of dactyl 4.6 mm. Dype locality.—Sitka (W. R. Coe, Harriman Expedition); one female IIo RATHBUN with ova (U. S. National Museum, No. 25,692). This species represents a more northern latitude than any Alpheid hitherto described. Affinities. —The species differs from 2. longidactylus Lockington in its small hands, non-gaping fingers devoid of teeth, in the relative lengths of the carpal segments of the second pair of legs, in the shorter antennular spine, in the unequal peduncular joints of the antennule, as well as in some minor respects, } Family ZYSMATIDZ. Genus Processa Leach. PROCESSA CANALICULATA Leach. Processa canaliculata LEACH, Mal. Podoph. Brit., pl. XLI, and correspond- ing text, July 1, 1815.—-RATHBUN, Bull. U. S. Fish Comm. for 1900, Vol. Il, p. 104, 1901, and synonymy. Two specimens of unusual interest were taken at San Diego, Califor- nia, by D. S. Jordan, in 1880. They are about 22 mm. long, and differ from typical specimens in having the left foot of the first pair similar to the right, or chelate. One specimen is a female, and has both chelipeds present. The other is so mutilated that the sex is indeterminable ; it has a left cheliped, the right is missing. This form might perhaps be deemed a distinct species or genus were it not that among a lot of specimens from Cedar Keys, Florida, both forms occur. From this locality they are small (12 to 15 mm. long), and five specimens are bichelate, while four have only a right cheliped, the left foot being simple, as in typical A. canaliculata, ‘These two forms from the same locality present no other appreciable difference. Aside from this remarkable dimorphism in the left first foot, the species is a most variable one. The rostrum may be half as long or nearly as long as the eye. The eyes, while always of good size, are not uniform, in some cases larger and more reniform, with the cornea extending on the outer side almost back to the carapace. The second joint of the anten- nule varies from one and a fourth to twice the length of the third joint. The antennal scale may be a little more than half as long as the carapace (rostrum excluded) or even two thirds as long as carapace; it may be just as long as the antennular peduncle, or distinctly longer. Of the speci- mens examined, those from the west coast of Mexico and Panama Bay have the largest eyes; they agree fairly well with the description and figure of Bate’s P. processa from Amboina, 15 fathoms. 1 The type of B. harrimani has been compared with Dr. Holmes’s description of 2. longidactylus (Occas. Papers Calif. Acad. Sci., vil, 190, 1900), specimens of that species not being at hand. DECAPODS II! To the localities recorded by me in rgor (loc. cit.) may be added the following: Cedar Keys, Florida, in seaweed, between tides, two forms as described above (H. Hemphill). Trinidad (A/batross). San Diego, California; feet of first pair chelate (D. S. Jordan). Off Abreojos Point, Lower California, 48 fathoms (A/batross station 2834). Gulf of California, 29-71 fathoms (A/batross stations 2998, 3011, 3014). Panama Bay, 51% fathoms (Aldaiross station 2805). Range.—Europe; Madeira; Bermudas; from North Carolina to Trinidad, including Gulf of Mexico and West Indies; from San Diego, California, to Panama Bay; Japan; Amboina. Shallow water to 111 fathoms. Family CRANGONIDA. Genus Crangon Fabricius. KEY TO THE SPECIES OF CRANGON. A. Gastric region not depressed below the general level of the carapace. B. Carapace with 1 or more median spines. C. Carapace with 1 median spine. D. Sixth segment of abdomen with 2 prominent longitudinal Cn eae 8. 9c es ae oe Oe eo D’. Sixth segment of abdomen not carinated. E. Sixth segment of abdomen sulcate beneath. F. Manus of first pair of feet very slender, four or more times as long as broad. Fifth abdominal segment with a posterior spine at the supero-lateral angles. G. Hand of male four and a half times as long as wide Jranciscorum. G’. Hand of male five and a half times as long as wide Sranciscorum angustimana. F’. Manus of first pair of feet not slender, less than three and a half times as long as wide. G. Fifth segment of abdomen not carinate. H. Blade of antennal scale having its anterior margin more advanced at its inner than its outer angle. Sixth segment of abdomen with a large circular spot on either side of its posterior end nigromaculata. H’. Blade of antennal scale having its anterior margin retreating toward the inner angle. Sixth seg- ment of abdomen without a large circular spot seplemspinosa. G’. Fifth segment of abdomen furnished with a superior median carina. H. Antero-internal angle of scale advanced, reaching IIi2 RATHBUN nearly as far as, or farther than, the spine. Hands a little over twice as long as wide nigricauda. H/’. Antero-internal angle of scale is not produced, and the spine reaches much beyond the blade. Hands two and a half to three times as long as wide. J. Scale shorter than the en exclusive of ros- _ trum - « « @laskensis. J’. Scale as long as the carapace, exclusive of rostrum .. . . . . @laskensis elongata. E’. Sixth segment of abdomen convex, not sulcate, beneath. F, Hands very stout, only two and a fourth times as long as wide; antepenult segment of outer mae greatly dilated . . . . alba. F’. Hands elongate, about three and a half times as long as wide; antepenult segment of outer maxillipeds not Giiateds Pray 5 ass. + 4 OI C’. Carapace with 2 median spines. D. Both median spines in front of the middle of the carapace. E. Rostrum slightly 5 ae rounded at the tip. Surface pubescent . . - communis. E’. Rostrum ascending at an angle of 4 5 degrees, tip pointed. Surface naked. F. Eyes of moderate size . . . . « « « « wveSiMd. F’, Eyes very large . . . + « « @byssorum. D’. Posterior of the median spines situated at about the middle of the carapace . . - « « « « Milermema, B’. Carapace without a median gastric spine . « « « Shirestit.= A’. Gastric region depressed below the general level of the carapace. B. Second lateral carina of the carapace (counting from the middle) unarmed, C. Rostrum not spiniform, extremity obtuse. D. First to fourth abdominal segments, inclusive, smooth. E. Anterior median spine not advanced so far as the line of the orbits . . . - munita. E’, Anterior median spine projecting in “front ‘of the line of the orbits . . $16 oe «> GRIER D’. First to fourth abdominal segments more or less carinated. E. First to third tigi: of the pleon armed laterally with 2spineseach. . 2 « Spinosissima, ~ E’. First to third segments of pleon unarmed . « variabilts. C’. Rostrum spiniform, sharp . . : onal spinirostris. B’, Second lateral carina of the carapace armed with a spine a little behind the superior lateral spine . . . . . . « munitella, CRANGON NIGRICAUDA Stimpson. Crangon nigricauda STIMPSON, Proc. Calif. Acad. Sci., 1, 97, 1856; Jour. Boston Soc. Nat. Hist., VI, 496, pl. XXII, fig. 6, 1857. DECAPODS is Crangon nigricauda HOLMES, Occas. Papers Calif. Acad. Sci., vil, 170, pl, Il, fig. 31, 1900, but not all refs. to synonymy. Carapace only a little more than one third the length of the abdomen, furnished with a single median gastric spine, and a hepatic spine, in a transverse line. Rostrum rather short, grooved, rounded at the tip. Suborbital and antennal spines present, the latter the larger. The process on the outer side of the base of the antennules is broad, irregularly ovate, and about reaches the tip of the first joint; flagella longer than the peduncle, the inner one, and sometimes the outer one, exceeding the scale. Antenne as long as, or longer than, the body, acicle about two thirds the length of the carapace, the antero-internal angle rounded and produced, reaching nearly as far forward as the spine at the outer angle (sometimes farther than the spine). The outer maxil- lipeds reach about as far forward as the antennal scale. The first pair of feet may extend as far forward as the maxillipeds, or be a little shorter; merus with a spine near the middle of the lower side; hand oblong, a little more than twice as long as wide, with the edges subparallel; the margin ~* A : - Fic. 50. Crangon against which the finger closes is regularly convex and more nigricauda. Chela nearly transverse than longitudinal ; spinous pollex directed Bay, Calif Bt obliquely forward. A spine on the sternum between the bases of the third pair of feet. Antepenultimate segment of abdomen distinctly carinated in the mid- dle; the sixth segment has a tendency to become carinated, and has a shallow median groove. Telson grooved above, subacute at tip, and ex- ceeding the sixth plus one half of the fifth. An acute tooth on the sixth segment on either side of the base of the telson, and a spine at the postero-inferior angles, between which there is a median ventral spine curved backward; the posterior three fourths or more of the ventral sur- face of this segment is marked by a groove. Color in life, dark gray with a blackish tail (Holmes). Dimensions.—Length of female (Catalogue No. 3052) from tip of rostrum to tip of telson 68 mm., length of carapace 17 mm., of antennal scale 10.5 mm. Distribution.— According to Holmes (who includes here C. alaskensis), this species ranges from Alaska to Lower California. I have seen speci- mens ranging only from Comox, British Columbia, southward, as fol- lows: Comox, British Columbia (4/éatross). Neah Bay, Washington, in drag seine (A/batross). Puget Sound (T. Kincaid). 114 RATHBUN Bodega Bay, California (University of California). San Francisco Bay, California (W. H. Dall; Livingston Stone). San Francisco Bay, off San Mateo, 3 fathoms, dredged (4/batross). San Francisco Bay, on South Belmont oyster beds, seine (A/ba/ross). San Francisco Bay, in San Pablo Bay, in Chinese shrimp nets (4/éatross). San Francisco Bay, off San Bruno Point, in Chinese shrimp nets (4/- batross). San Francisco market (R. E. C. Stearns). Monterey (D. S. Jordan). Catalina Island (A/batross). San Diego (H. Hemphill; D. S. Jordan; Albatross). San Diego Bay, 534-12 fathoms (A/datross stations 3574, 3581, 3582, 3621). Station 3674 of A/datross (locality not given), 31 fathoms. San Geronimo Island, Lower California, 7 fathoms (A. W. Anthony). Mogi, Japan (Dr. F. C. Dale, U. S. S. Palos, June 18, 1881); one speci- men without chelipeds, which otherwise corresponds closely with the American form; probably, however, distinct from C. afinis De Haan and C, propinguus Stimpson. Monterey (Owen, as C. vulgaris). CRANGON NIGROMACULATA Lockington. mm istribution.—From northern California to Lower (( ) California, 3-33 fathoms. Specimens in the National Museum range from Gulf of nigromacndeta Chel the Farallones to San Diego, California; also found at rote me Turtle Bay, Lower California. CRANGON ALASKENSIS Lockington. Crangon alaskensis LOCKINGTON, Proc. Calif. Acad. Sci., vil, 34 [7], 1876 (1877). Mutiny Bay, Alaska. Differs from C. nigricauda as follows: ‘The antennal scale is a little longer and much narrower distally ; the end of the blade is rounded and not produced at the antero-internal angle; the spine is much longer, extending considerably beyond the blade. F The first pair of feet are shorter, reaching A re only to the middle of the terminal segment of the maxillipeds; the hands are more , Fic. 52. Cran- ee bres slender and elongate, being from two and a Bie (Coens Station 3652... half to three times as long as wide; their alaskensi msis, & al vow distal margin is more oblique, forming an angle of about of rostral region (x (x forty-five degrees with the lengthwise margins. Dimensions.—Length of large egg-bearing female from Kulukak Bay, DECAPODS 115 Alaska (station 3243), 77.2 mm.; length of carapace 20.1 mm.; length of antennal scale 14 mm. Distribution.— East part of Bering Sea and along the Aleutian Islands, in 34-41 fathoms, at 38 stations of the Albatross. Also taken at the following localities: Off Kurile Islands, 14 fathoms (A/dazross station 3652). Gulf of Georgia, British Columbia, 67 fathoms (A/baiross station 2863). Sucia Island, British Columbia (AZéa¢ross). Bellingham Bay, Washington, 11 fathoms (A/dazross station 3612). Strait of Fuca, 81 fathoms (A/datross station 3596). Port Townsend, Washington, rostrum narrower than typical (A/atross). Puget Sound (T. Kincaid). From Sitka northward to Port Clarence and westward along the Aleutian Islands to Attu, 5-20 fathoms, at sixteen localities (W. H. Dall). CRANGON ALASKENSIS ELONGATA Rathbun. Crangon alaskensis elongata RATHBUN, Proc. U. S. Nat. Mus., xxIv, 888, 1902. The typical C. alaskensis described above passes by insensible grada- tions into a form occurring off the coast of California and Oregon, which differs from it as follows: The rostrum is longer and narrower. The outer flagellum of the antennules falls considerably short of the antennal scale. The scale is much longer than in the typical form, being equal to the A length of the carapace exclusive of the rostrum. The fourth segment of the abdomen shows signs of carination. “HG Sia Aeta The telson is flattened above, but scarcely grooved; its glaskenss elongate. e tip is more acute. Anterior part of cara- Dimensions.—Length of ovigerous female from tip of a aa aac rostrum to tip of telson 55.7 mm.; length of carapace 13.5 mm.; length of antennal scale 11.6 mm. Type locality.— Off Santa Barbara, California, 29 fathoms, stations 2970, 2971 (Albatross). Distribution.—This species occurs in abundance off the west coast of the United States. It has been taken by the Albatross at thirty stations in 9-278 fathoms, off California, Oregon, Washington, and British Colum- bia, and in Strait of Fuca and Puget Sound. The southern limit is off Wilmington, California. It has also been collected in Monterey Harbor by Dr. W. H. Dall, and at Pacific Grove by Mr. J. O. Snyder. Variations.—The more northern of these specimens (those off the coast of Washington more especially) have the scale not quite so long as the types, but still equal to about four fifths the length of the carapace; the 116 RATHBUN rostrum, too, is often intermediate between typical a/askensis and typical alaskensis elongata. CRANGON SEPTEMSPINOSA Say. Crangon septemspinosus SAY, Jour. Acad. Nat. Sci. Phila., 1, 246, 1818. Crangon crangon and Crangon vulgaris of authors (part). Associated sometimes with C. a/askensis, which it closely resembles ; it can be recognized at once by the rounded (non-carinated) abdominal segments. In Alaskan specimens the antennal scale is a little more than two thirds the length of the carapace; it is equal to or (Gees exceeds the distance from the gastric spine to the pos- 7 terior margin; the extremity of the blade is obliquely alee ea ney. subtruncate, slightly rounded, the antero-internal angle (X 2). Station 323°. retreating; the spine surpasses the blade to a distance exceeding the anterior width of the blade. The hands are variable in length, being from three to three and one half times as long as wide; the obliquity of the terminal margin is as in C. alaskensis. All the ab- dominal segments are free from carine; the sixth and seventh have a slight median sulcus. There is considerable variability in Atlantic specimens of this species, in the length both of the scale and of the hands; I cannot see that our Alaskan specimens differ essentially from those of Chesapeake Bay. Dimensions. — Female, station 3230, length from tip of rostrum to tip of telson 60.4 mm., length of carapace 15.6 mm., length of antennal scale 11 mm. Color.—It is probable that in life the species could readily be detected by the color markings. In alcohol the speckles of the dorsal surface are more uniform and closer than in C. alaskensis, and the telson and uropods are darker than in C. a/askensis from the same dredge haul. Distribution.—This species is less abundant along the Alaskan coast than C. alaskensis; it extends from the Arctic coast of Alaska at Eschscholtz Bay southward along the eastern shore of Bering Sea to the Shumagins; the separate localities are as follows: Chamisso Harbor, Eschscholtz Bay, 5—8 fathoms (W. H. Dall). Port Clarence, in the seine, with C. alaskensis (W.. H. Dall). St. Michael, Norton Sound (L. M. Turner; E. W. Nelson). Head of Norton Sound, 5 fathoms (Point Barrow Expedition). Off mouth of Yukon, 3% fathoms (E. W. Nelson). Cape Etolin, Nunivak Island, anchorage, 8 fathoms, stony (W. H. Dall). Hagemeister Strait, 8-15 fathoms, gravel (W. H. Dall). Bristol Bay (C. L. McKay). Bristol Bay, 31% fathoms, with C. adaskensis (Albatross station 3230). DECAPODS 117 Bailey Harbor, Alaska Peninsula (A/batross). Coal Harbor, Unga Island, Shumagins, 3 fathoms (W. H. Dall). Also occurs along the eastern coast of North America, from East Florida (Say) northward. It becomes necessary to separate the common Crvangon of the Atlantic and Alaskan coasts of North America from the form found in Europe. These two species have usually been combined under the name Crangon crangon (Linneus) or C. vudgaris Fabricius. In Crangon crangon (of Europe) the antennal scale is wider at its distal end, and that margin, although convex, trends forward toward the inner angle. The spine is shorter than the distal width of the blade. In Crangon septemspinosa Say (of America) the scale is narrower at its distal end, and that margin, although convex, does not trend forward toward the inner angle, but rather slopes backward. The spine is as long as, or longer than, the distal width of the blade. CRANGON ALBA Holmes. Crangon alba HOLMES, Occas. Papers Calif. Acad. Sci., VII, 174, 1900. Monterey, dredged. A short stout species. Carapace about two fifths as long as abdomen. Rostrum broader than in C. nigricauda. The first segment of the anten- nule exceeds the process on the outer side of its base; inner flagellum exceeding the antennal scale; outer % flagellum shorter than the scale. Blade of scale with very oblique inner margin, the tip scarcely wider than the adjacent portion of the spine; spine extending considerably beyond the blade. Scale «¢ about three fourths the length of carapace. | Fis. 56 . Cresson e141: A a. 9. San Diego. Maxillipeds reaching the end of the @: Dorsalview of orbital elias Cielo blade, the antepenult segment much ex- xa ee panded. ‘The first pair of feet reach to the middle of the last joint of the maxillipeds; the hand is very stout, wider than in C. nigricauda, the length being two and one fourth times the width measured from the inner base of the immovable spine; the anterior margin is more longitudinal than transverse. The segments of the abdomen are smoothly rounded; the sixth is rounded beneath, not grooved; the seventh is not sulcate above. Dimensions. —An ovigerous female (station 3679) measures 48 mm. long, carapace 12.5 mm., scale 9.7 mm. Distribution.—From Vancouver Island, British Columbia, to San Diego, California, to a depth of 47 fathoms, at the following localities: AN 118 RATHBUN Off Cape Beale, Vancouver Island, 34 fathoms, stations 2879, 2880. Off Cape Flattery, Washington, 40 fathoms, station 2873. Gulf of the Farallones, 29 fathoms, station 3100; 47 fathoms, station 3157+ Off Lobos Rocks, California, 41 fathoms, station 3185. South of San Diego Bay, 22 fathoms, station 3679. Off Cortez Bank, California, 47 fathoms, station 2922. San Diego, depth not given (Albatross). Pacific Grove, California (J. O. Snyder). CRANGON HOLMESI Rathbun. Crangon holmest RATHBUN, Proc. U. S. Nat. Mus., xxIv, 888, 1902. A small species allied to C. aa Holmes in not having a groove on the under side of the sixth abdominal segment. Carapace a third as long as the abdomen; rostrum narrow-triangular, short, with a rounded tip. Antennule asin C.a/ba. Antenne nearly as long as the body; scale either as long or nearly as a long as the carapace exclusive of the rostrum; 4 , blade very narrow at the extremity; spine much exceeding it. Maxillipeds exceeding the scale a —J little; antepenult segment not dilated. The first Fido Chonpi eotneet pair of feet reach to the middle of the terminal c d angle. Fic. 64. Crangon communis. 2. Station 3611. @. Dorsal view of ante- The first segment of the antennular peduncle rior pee emeneiners Cx2. % ip cw extends beyond the eyes to a distance exceed- ee OY ing the length of the last two segments; the second segment is about twice as long as the third. The antennal scale is elongate, about two thirds the length of the carapace; the spine is slender and exceeds the blade. The outer maxillipeds are very slender and extend slightly be- yond the scale. The first pair of feet may not quite reach the scale or may extend beyond it; the merus has an outer distal spine; the manus is over three times as long as its average width; the immovable digit is long and slender, and the dactylus when flexed is obliquely transverse. The sternum has a series of median tubercles. The abdomen is smoothly sculptured ; there is a blunt median carina on the third to fifth segments; the first and second segments have a transverse sulcus; the third and fourth segments have each two trans- verse sulci, which are connected either side of the median carina; the sixth segment is furnished with two prominent longitudinal carine, a median sulcus, and a sulcus on the outer side of each carina; the seventh 124 RATHBUN segment has a deep median sulcus. The abdominal sulci are filled with a thin short pubescence easily rubbed off. The sixth segment is about one and a third times as long as the fifth. Dimensions.—Female (station 3441), length from tip of rostrum to tip of telson 64 mm., length of carapace 16 mm., length of antennal scale 10.5 mm. Harriman Expedition,—Juneau, 20 fathoms. Distribution.—From Bering Sea to San Diego, California (including Puget Sound and Strait of Fuca), 20-309 fathoms; taken at 142 stations by the A/datross, often in large numbers. Less abundant at southern localities. Off southeastern coast of Kamchatka, 96-100 fathoms, at two Albatross stations. Two specimens were received from the Hopkins Laboratory at Pacific Grove; they were probably taken in deep water. One specimen was collected at Port Etches, Alaska, in 12-18 fathoms, by W. H. Dall. Variations.—The rostrum in normal individuals does not extend be- yond the eyes; in many cases, however, it is evident that the rostrum has been broken off or injured and later renewed, the new rostrum having a narrow, elongated, and ascending tip exceeding the eyes, but of variable length. In other respects these abnormal forms do not differ from the types. CRANGON RESIMA Rathbun. Crangon resima RATHBUN, Proc. U. S. Nat. Mus., XxIv, 889, 1902. Near C. communis. Carapace and rostrum a little more than one third the il of the abdomen; a median carina on the middle third of the carapace, armed with two spines, not far apart, the posterior larger and more ele- | vated and in front of the middle. A sharp hepatic spine is in a transverse line with the anterior median spine and terminates a short but prominent carina. Rostrum long, narrow, pointed, advanced beyond the eyes, ascend- ¢) ing at an angle of about forty-five degrees, aie, x pa " zesima. ®- slightly curved, and prolonged downward in Sede ota x 2)...a thin compressed plate which appears spatu- late in a side view. The development of this (X 33). @. Chela (Xx 4 plate is dependent on age; specimens 20 mm. long show no evidence of it. The second segment of the antennular peduncle is three times as long as the third; the scale on the outer side at the base is very thin and DECAPODS i2s rhomboidal, tipped with a short spine; the flagella are not very unequal in length, and exceed the antennal scale, but not the hair which fringes it. The antennal flagellum is longer than the body; the scale is four fifths of the carapace exclusive of the rostrum; its extremity is rather broad and slightly rounded, and is surpassed by the outer spine. The maxillipeds are slender and reach beyond the scale; the first pair of feet extend to the middle of the last joint of the maxillipeds; they are similar to those of C. communis; the hands are shorter, three times as long as broad; their anterior margin, and also the dactylus when flexed, are more longitudinal than in C. communis. The second and third pairs of feet are equally slender; the second pair is shorter than the first; the third pair is considerably longer than the first. The first and second segments of the abdomen have a thickened band along the posterior margin, in front of which there is a slight transverse depression; the fifth segment has an obscure median carina with a short depression on either side at the anterior end; for the rest, the first five segments are smooth; the sixth has two prominent carine and a corre- sponding median depression; the telson is slender, and has a slight median sulcus; it exceeds the uropods. Dimensions.— Length of ovigerous female (station 2935) from tip of rostrum to tip of telson 48.3 mm., length of carapace 12.2 mm., length of antennal scale 8.2 mm. Even females only 22.2 mm. long are laden with eggs. Type locality.—Off San Diego, California, 124 fathoms (Albatross sta- tion 2935). Distribution.—¥rom Monterey Bay, California, to San Domingo Point, Lower California, station 3043 ; 44-266 fathoms, at 17 stations of the Albatross, usually in small quantities. CRANGON ABYSSORUM Rathbun. Crangon abyssorum RATHBUN, Proc. U. S. Nat. Mus., XXIV, 890, 1902. Integument very thin, membranaceous. Carapace and rostrum about two fifths the length of the abdomen. Carapace with three carinz, extending nearly its whole length; median armed with 2 spines, one at the anterior third of the carapace (ros- trum not included), the other minute, in front of the first. This small spine is often broken off. Rostrum linear, flattened above, acute, as- cending at an angle of about thirty degrees with the carapace, and slightly curved, a little higher than wide, the lower part laterally com- pressed, in length about one fourth the remainder of the carapace. The 126 RATHBUN lateral carina extends backward from the orbital sinus. There is a strong hepatic spine at the end of a short carina; also a spine at the outer angle of the orbit and an antennal spine. Eyes very large, hemispherical, their inner faces flat and contiguous, the carinz ety. nearly all the outer face. Antennules rather slender; the scale at base is small, falcate, and acuminate, the second segment about one and a half times as long as the third; the flagella both exceed the antennal scale, , the inner is only a little longer than the * outer. The antennz have a slender spine at the outer base of the scale, which is narrow-oblong and about three fourths as Fis. 66, Crangon abytsorum. @ (x2), long as the carapace (rostrum excluded) ; nomay ~ A Dowel Serr on anterior the blade is rounded at the end, and and dorsal spines. ¢. Acicle. @. Chela. the spine projects beyond it; the peduncle reaches to the distal third of the scale, its last joint is very slender, the flagellum is about as long as the body. The maxillipeds are slender and exceed the scale by nearly half the length of the terminal segment. ‘The first pair of feet do not reach the end of the scale. The merus has a small superior terminal spine. The manus widens a little distally ; its length is three times its width measured at the inner base of the spine; the dactylus is more longitudinal than transverse. The second and third pairs of feet are equally filiform and delicate ; the second reaches to the middle or beyond the middle of the palm of the first; the third reaches beyond the antennal scale; the fourth pair also exceeds the scale; the fifth pair is a little shorter. In the male the sternum has a median carina with a small spine on each segment. The fifth segment of the abdomen has a low blunt carina; the sixth has two prominent dorsal carinze and a low lateral carina on each side near the dorsal, but extending only half the length of the segment; the telson has a median furrow on its anterior fourth; it exceeds the uropods. Dimensions.—Length of female 61 mm., of carapace and rostrum 17 mm., of carapace exclusive of rostrum 13.5 mm., of antennal scale 10.3 mm. Type locality.—Bering Sea, southwest of Pribilof Islands, 1771 fath- oms (A/batross station 3603). Distribution.—A deep-water species extending from Bering Sea to the southern extremity of California, in 685-1771 fathoms. Taken by the Albatross at the following localities : Bering Sea, south of Pribilof Islands, 1401 fathoms, station 3604. DECAPODS 127 Bering Sea, southwest of Pribilof Islands, 1625 fathoms, station 3308. Bering Sea, north of Rat Islands, 850 fathoms, station 3784. Bering Sea, north of Unalaska, 987 fathoms, station 3607. East of Prince of Wales Island, Alaska, 1569 fathoms, station 2859. North of Islands of Four Mountains, Alaska, 1033 fathoms, station 3307. Off Queen Charlotte Islands, British Columbia, 876 and 1588 fathoms, stations 2860, 3342. Off Sea Lion Rock, Washington, 685 to 877 fathoms, stations 3069, 3971, 3974, 3975- Off Cape Elizabeth, Washington, 831 fathoms, station 3344. Off Tillamook Bay, Oregon, 786 fathoms, station 3346. - Off Cortez Bank, California, 984 fathoms, station 2919. This species in general appearance much resembles a /ontophilus. CRANGON MUNITA Dana. Crangon munitus DANA, Crust. U. S. Expl. Exped., I, 536, 1852; pl. XXXIII, fig. 5, 1855. Female.—Body short and thick. Carapace less than two fifths the length of the abdomen; the anterior and middle portion of the carapace is depressed and pubescent; this depressed area is defined by a curved line extending backward from the antero-lateral angle nearly to the pos- terior margin on the median line, and is crossed in part by nine carine. The median carina is the length of the depression and is armed with two spines, one at two fifths the distance from the posterior margin, the other at an equal dis- tance from the first. First lateral carina short, ter- minating in a spine half way between the two 5 Fic. 67. Crangon munita. &(X 2). Station 2881. a. Dorsal median spines. Second view of carapace and abdomen. 4. Side view of carapace. lateral carina as long as the dorsal depression, and unarmed except for the spine at the anterior end, which marks the outer angle of the orbit. Third lateral carina short, terminating in a spine half way between the superior lateral spine and the anterior median spine. Fourth lateral carina form- ing the boundary of the depression and terminating in a spine at the antero-lateral angle of the carapace. Rostrum short, reaching to a line between the tips of the orbital and the antero-lateral spines; nearly horizontal, medially sulcate, tip rounded. The scale at the base of the antennules is broad, has a straight outer margin, and is tipped with a small spine. The first and second segments of the peduncle have a blunt spine at the outer distal angle, that on the 128 RATHBUN second segment reaching the distal end of the third segment; the flagella are unequal, both exceed the antennal scale. The antennal peduncle reaches nearly to the end of the scale; the scale is short and broad, the blade is rounded at the end, strongly advanced at the antero-internal angle, and greatly exceeds the spine; the flagellum is one and a half times the length of the carapace. The maxillipeds surpass the antennal scale by nearly the whole length of the last segment. The first pair of feet are shorter than the maxillipeds but longer than the scale. Hands oblong, narrowing a little distally, or presenting a slight constriction at the base of the spine; three times as long as wide; anterior margin slightly longitudinal; spine short. The second and third pairs of feet are equally long, and shorter than the first pair; the fourth is shorter than the third, the fifth still shorter. The first to fourth segments of the abdomen are dorsally smooth; the fifth has a faint blunt median carina; the sixth is about one and a third times the length of the fifth and has four blunt carine, two of which are submedian ; the lateral carinee converge posteriorly ; the posterior superior angles are armed with a strong spine, the inferior with a small spine; the telson has a deep median sulcus; the ridges on either side of it are armed with two pairs of spinules; the tip is triangular, pointed. The male differs from the female as follows: The spine at the antero- lateral angle is longer and more slender, and is sometimes directed out- ward. ‘The median carina is strong even to the posterior margin of the carapace, and its spines are higher. The maxillipeds are shorter, exceed- ing the scale by only half the length of the terminal segment. The carine of the fifth and sixth abdominal segments are stronger. The ventral surface of the thorax has a thin, strongly projecting carina, cut into four large saw-teeth. Each segment of the abdomen, except the last, has a median ventral spine. Dimensions.—Male (station 2881), length of body 32.6 mm., of cara- pace 9.1 mm., of antennal scale 4.2 mm. Female with eggs, length of body 36.2 mm., of carapace 10 mm., of scale 4 mm. Distribution: Port Etches, Alaska, 12-18 fathoms (W. H. Dall). Off Cape Beale, Vancouver Island, British Columbia, 24-34 fathoms (Albatross stations 2879-2881). Puget Sound (Dana, Walker; also collected by T. Kincaid). Off Point Conception, California, 31 fathoms (A/batross station 2908). Off San Miguel Island, California, 53 fathoms (A/batross station 2894). Dana describes the abdomen as smooth; the carina of the fifth seg- ment is very indistinct in the female, while Dana in his figure indicates two carinz on the sixth segment. DECAPODS 129 CRANGON ACCLIVIS Rathbun. Crangon acclivis RATHBUN, Proc. U.S, Nat. Mus., xxIv, 890, 1902. Allied to C. munita. Lower lateral spine of carapace farther back ; anterior median spine much larger and farther forward; it projects well in front of the posterior line of the orbits. The rostrum is narrower, and ascending at an angle of about forty-five degrees. The anterior margin of the hand is more longi- tudinal than in C. munita. The divisions of the ventral carina of the thorax in the male are much more spiniform in this species. ; Z Dimensions.— Length of male 24.8 mm., length of carapace 7.4 mm., of antennal scale 3 mm. | Typ fe locality. —Oft Santa Cruz Island, Cal- Fic. 68. -Crangon acclivis. a, Dorsal ifornia, 266 fathoms (Adazross station yw of view x a) Pay ee raster 2948), 1 male. d. Chela. @ (x 8). Distribution.— Off the Trinity Islands, Alaska, 159 fathoms (Adbatross station 2853); Santa Catalina Island, California, 80 fathoms (A/datross station 3664); southwest of San Nicholas Island, California, 158 fathoms (Albatross station 2898). One specimen taken at each locality. In the foregoing species the first four segments of the abdomen are smooth. We now come to a group also resembling C. munita in general appearance, but having the abdomen in front of the fifth segment more or less carinated. CRANGON VARIABILIS Rathbun. Crangon variabilis RATHBUN, Proc. U. S. Nat. Mus., xxIv, 890, 1902. The carapace is much like that of C. muniza, but is nearly half as long as the abdomen. The rostrum is short, convex from behind forward and the tip rounded and thickened. The anten- nal scale has a concave outer margin and the spine equals or extends beyond the blade. The chelipeds are stouter; the hands vary from two and a half to three times as Fic. 69. Crangon variabilis. 9. Station 2842. a. Doral long as wide. The sec- view of carapace and abdomen (x 2). 4. Side view of carapace ° (X 2). oc. Acicle (x 4). d@. Chela (4). : ond, third, fourth, and 130 RATHBUN fifth, and sometimes the first, segments of the abdomen are carinated, and (except on the first two) the carina usually high, laterally com- pressed, and blunt. The lateral spinules of the telson are considerably behind the middle of the segment. The median spines or teeth of the ventral side of the thorax in the male are laminar and dentiform; the anterior one has an acuminate, the others an acute, tip. Dimensions.— Female, length of body 32.2 mm., of carapace 9.2 mm., of hand 5.6 mm., width of hand 2mm. Male, length of body 24.6 mm., of carapace 7 mm., of hand 4.1 mm., width of hand 1.5 mm. Lype locality.—Off North Head, Akutan Island, Alaska, 72 fathoms (Albatross station 2842). Distribution.—Bering Sea, Alaska Peninsula, and Aleutian Islands; California; 50-695 fathoms. Taken by the A/datross at the following stations : Bering Sea, off the Pribilof Islands, 81-184 fathoms, stations 3486, 3488, 3489, 3500, 3602. Off Rat aus 55 fathoms, station 3599. North of Unalaska, 225 fathoms, station 3227. Off Akutan Island, 91 fathoms, station 3548. Northwest of Unimak Island, 121 fathoms, station 3224. Unimak Pass, 50-56 fathoms, stations 3222, 3223. Off Davidson Bank, 280 fathoms, station 3337. South of Sannak Islands, 483 fathoms, station 3210. Off Shumagin Bank, 625 and 138 fathoms, stations 3338, 3339. Southeast of Chirikof Island, 695 fathoms, station 3340. Off the Trinity Islands, 159 fathoms, station 2853. Southwest of San Nicholas Island, California, 158 fathoms, station 2898. Variations —There is more variation in this species than is usual in this genus, perhaps owing to the great bathymetrical range. The rostrum is often much thickened and elevated, the median sulcus being almost obliterated. The hand is not of uniform proportion. It is a little longer in the male than in the female, and varies in specimens of the same sex from differ- ent localities. ‘The median abdominal carina is in general less strong on specimens from deeper water. These differences are not constant enough to warrant the division of this species. CRANGON SPINOSISSIMA Rathbun. Crangon spinosissima RATHBUN, Proc. U.S. Nat. Mus., XXIV, 891, 1902. The relation of this species to C. variadilis is similar to that which C. acclivis bears to C. munita. ‘The lower lateral spine of the carapace is more nearly in line with the superior lateral spine; the anterior median DECAPODS 131 spine is larger and farther forward, advancing to a line in front of the rear line of the orbits; the antero-lateral spine is longer and slenderer and bent more outward; the rostrum is narrower, longer, and acute, and as- cends at an angle equal to that of the spine directly behind it; the spine 2s Fic. 70. Crangon gee pean Q ( (x 2). Station 3351. @. Dorsal view of carapace. 4. Side view. of the antennal scale is much shorter than the blade; the hand is longer and narrower, and its anterior margin more longitudinal; the spines of the ventral surface of thorax and abdomen are long and slender. This species furthermore differs from those hitherto described in having the segments of the pleon armed laterally with spines, the first three segments with two spines each, the next three with one spine each at the postero-lateral angle ; the sixth segment also with a slender spine at the postero-superior angle. Dimensions.—Female, length of body 36 mm., of carapace 10.5 mm, Male, length of body 34.6 mm., of carapace 1o mm. Length of hand loose in bottle 5 mm., width 1.4 mm. Type locality.—Off Point Arena, California, 51 fathoms (AJ/éatross sta- tion 3351). Distribution.— Off Oregon and California, 51-96 fathoms: Off False Tillamook, Oregon, 62 fathoms, station 3090. Off Point Conception, California, 96 fathoms, station 2906. CRANGON SPINIROSTRIS Rathbun. Crangon spinirostris RATHBUN, Proc. U. S. Nat. Mus., XxIv, 891, 1902. Also allied to C. munita and its associates, but differing from them all in its long spiniform rostrum. The position of the spines of the carapace is ~ ( similar to that in C. munita. The rostrum and the “ spine behind are long, slender, and suberect, the 7 rostrum the longer. The orbital spine is slender and ascending; the antero-lateral spine is directed 2 upward and outward. The spines of the first two antennular segments are slender; that of the anten- nal scale is longer than usual, exceeding the blade. ee Pip irae agg sie The hand is about three times as long as wide. Of 2r2pace. ‘Dorsal i las the projecting plates on the ventral surface of the thorax in the male, the 132 RATHBUN anterior has an acuminate, the other a spiniform, tip. The third to fifth segments of the abdomen are carinated; the anterior pair of lateral spinules of the telson are two fifths the distance from the tip. Dimensions. — Female, length of body 35.4 mm., length of carapace 10.5 mm., of scale 4.4 mm., of hand 5.2 mm., width of hand 1.8 mm. Male, length of body 33 mm., length of carapace 10.3 mm., of scale 3.9 mm. Distribution. — Bering Sea and off the Aleutian Islands, 276-625 fathoms, as follows: North of Rat Islands, 270 fathoms (A/datross station 3785). South of Pribilof Islands, 276 fathoms (A/batross station 3608). Off Iliuliuk Harbor, Unalaska, 309 fathoms (A/datross station 3316). North of Unalaska, 350-406 fathoms, stations 3329 (type locality) to 3332+ Off Shumagin Bank, 625 fathoms, station 3338. CRANGON MUNITELLA Walker. Crangon munitellus WALKER, Trans. Liverpool Biol. Soc., XII, 275, pl. XVI, fig. 1, 1898. Puget Sound.—HOLMEs, Occas. Papers Calif. Acad. Sci., VII, 176, 1900. This species is related to C. munitus, but differs from it and all its allies in having the second lateral carina from the middle armed with a spine a little behind the superior lateral spine. The distance between the two median spines is equal to the distance between the posterior of these spines and the posterior margin. The antero-lateral angle of the cara- pace is armed with a spine. The end of the blade of the antennal scale is so produced at the inner angle that it is more advanced than the spine at the outer angle. The first four abdominal segments are smooth; the fifth has a carina faintly indicated; the sixth has a broad, smooth carina set off by a depression on either side; the seventh has a slight median depression. The hands of the first pair of feet are two and a half times as long as wide, oblong, swollen, the anterior margin more longitudinal than transverse, spine very long. Dimensions.—Female with eggs, length 25 mm., length of carapace 7 mm. Distribution.—Puget Sound (Walker, Calman; also collected by T. Kincaid); Pacific Grove, California (J. O. Snyder); Catalina Harbor, California, 30-40 fathoms, sandy mud (W. H. Dall). Genus Sclerocrangon Sars. KEY TO THE SPECIES OF SCLEROCRANGON. A. A long suberect spine situated on the rostrum; four spines on median carina . . . + . . * o . 2 . * . . . . * sharpi. DECAPODS 133 A’. No long suberect spine situated on the rostrum ; fewer than four spines on median carina. B. Carapace elongate, about one fifth longer than wide; blade of an- tennal scale considerably overreaching the spine. . . doreas. B’. Carapace nearly as long as wide; blade of antennal scale not over- reaching the Spin@e5- 465 ce) eo eet Gn wt SCLEROCRANGON BOREAS (Phipps). Cancer boreas PHIPPS, Voyage North Pole, 190, pl. Xu, fig. 1, 1774. Crangon Boreas SABINE, in Suppl. to Appendix of Capt. Parry’s [First] Voyage, p. ccxxxv, 1824. Sclerocrangon boreas SARS, Den Norske Nordhavs-Expedition, xiv, Zoologi, Crust., Pt. 1, p. 15, 1885.—HOLMES, Occas. Papers Calif. Acad. Sci., v1, 177, 1900, and synonymy. Carapace one fifth longer than wide; three equidistant spines on the dorsal carina; a tuberculated carina on the branchial regions armed with an anterior spine and one or two obscure teeth. Rostrum triangular, acute; tip horizontal. Antero-lateral angles armed with a spine project- ing forward or a little outward. Blade of antennal scale much produced beyond the spine. Hand twice or more than twice as long as wide; distal margin obliquely transverse; spine obliquely longitudinal. The merus has an upper distal spine, the carpus a lower distal spine. Abdomen sculptured, the anterior segment with a median dorsal carina which forms a forward projecting tooth on the first segment; the sixth segment with a double carina, with a sulcus between the ridges; also on each side of the posterior margin a supero-lateral spine. Pleura of the abdominal segments with only one spine each. Telson sulcate; two pairs of lateral spinules on the terminal half. _ Dimensions.—Male (Alaska), length 110 mm., length of carapace 32 mm., width of carapace at branchial spine 26.4 mm., length of hand 13.2 mm., width of hand at inner base of spine 6 mm. Harriman Expedition.—Kadiak, 5 fathoms (W. R. Coe); Berg Bay, Glacier Bay. Distribution. — Arctic Europe and America; Atlantic coast of America southward to Cape Cod; Alaska (as far south as Killisnoo) ; ‘ California’ (Ross, Owen); Siberia; Kamchatka (Ross). Depth, 1-44 fathoms. Numerous specimens were taken by the Albatross in Bristol Bay and vicinity in 34%-17 fathoms; by the U. S. R. S. Corwin in lat. 66° 12! oo” N., long. 168° 54/ 00” W., 30 fathoms, lat. 65° 49’ 15” N., long. 169° 04! 30” W., 26 fathoms, and lat. 71° 02/ oo” N., long. 157° 46! oo” W., 19 fathoms, : Killisnoo, Alaska (Northwestern Trading Company). _ Plover Bay, Siberia, 10-25 fathoms (W. H. Dall). 134 RATHBUN Cape Etolin, Nunivak Island, 8 fathoms (W. H. Dall). Various localities in the Aleutians and Alaska Peninsula, 6-28 fathoms (W. H. Dall). SCLEROCRANGON ALATA Rathbun. Plate 111, fig. 2. Sclerocrangon alata RATHBUN, Proc. U. S. Nat. Mus., XxIv, 891, 1902. Allied to S. boreas. Carapace only slightly broader than long; surface very uneven, sculptured and pitted. Median carina armed with a small spine just behind the orbits, a still smaller one at the middle of the carapace, and a tubercle near the posterior mar- é gin. Rostrum with an acute Fic. 72. Sclerocrangon alata. @ (X iy Station 2865. a. Dorsal view of upturned and carapace and ehdames., <. Saut rn eee curved tip. A spine at the outer angle of the orbit. Antero-lateral angles broadly alate. Branchial carina having a strong anterior spine; posterior half protuberant and deeply pitted, as is also the surface below the crest. The spine of the antennal scale extends as far as or a little farther than the blade. The first pair of feet have a strong upper distal spine on the merus, a large outer dentiform expansion on the carpus, and a very short stout hand less than twice as long as broad, « the anterior margin nearly transverse and the spine nearly longitudinal. The abdomen is sculptured. Fic. 73. Selero The median carina of the first five segments is very (a gua: Pd blunt, and on the third segment especially prominent. a. eile The pleura are without spines. The lateral spinules (one or two pairs) on the telson are situated at about its middle. Dimensions.— Male, length 38 mm., length of carapace 11 mm., width of carapace at branchial spine 10.7 mm., length of hand 4.4 mm., width of hand 2.5 mm. A female 25.7 mm. long is laden with ova. Distribution. — From Bering Sea to Puget Sound, 6-91 fathoms. Usually not more than one or two specimens in a haul. Taken at the following localities by the Albatross: DECAPODS ) 135 Bering Sea, off Akutan Island, 36 and 91 fathoms, stations 3546 and 3548. Northwest of Unimak Island, 43 fathoms, station 3262. Off south entrance to Akutan Pass, 45 fathoms, station 2843. Southwest of Sannak Islands, 41 fathoms, station 3213. Shumagins, 21 and 35 fathoms, stations 2850 and 2851. Strait of Fuca, 37 fathoms, station 3593. Admiralty Inlet, Puget Sound, 40 fathoms, station 2865 (type locality). By Dr. W. H. Dall at: Constantine Harbor, Amchitka, 6-10 fathoms. Bay of Islands, Adak, 9-16 fathoms. Captains Harbor and Iliuliukk Harbor, Unalaska, 9-15 fathoms. Belkofski Bay, 15-25 fathoms. Coal Harbor, Unga, 8—g fathoms. Popof Strait, Shumagins, 6 fathoms. Chiniak Bay, Kadiak. By N. Grebnitzky, at Bering Island, from stomach of Gadus macro- cephalus. SCLEROCRANGON SHARPI (Ortmann). Plate m1, figs. 1, 1a. «aril i echinatus SHARP (non Dana), Proc. Acad. Nat. Sci. Phila., 1893, Crangon (Sclerocrangon) sharpi ORTMANN, Proc. Acad. Nat. Sci. Phila., 1895, 178. Carapace about as broad as long, with three keels, the median one with four strong spines, the first longest and placed on the upper margin of the rostrum, the second nearly as long and situated immediately behind the base of the rostrum ; the first, third, and fourth spines are directed obliquely upward and forward, the second directly upward or a little backward. The rostrum is short, not reaching the end of the first antennular seg- ment, sharp and curved upward. The lateral keels are formed by four spines; the foremost, on the anterior margin of the carapace near the base of the antenne, is the largest, and is directed obliquely outward and forward, more than half as long as carapace; the three others are smaller but sharp. There is a sharp spine at the outer angle of the orbit and another on the outer side of the antenna at the base of the scale. Merus of first pair of feet with a strong superior terminal spine; car- pus with an outer, an inferior, and a smaller inner spine; hand more than twice as long as broad; anterior margin nearly transverse; spine short. The abdomen is sculptured, first to sixth segments with a median keel, that of the third arched and produced somewhat posteriorly, that on the third to sixth segments with a median furrow, that of the sixth terminat- 136 RATHBUN ing in two spines. Two other spines are placed at the posterior margin of this segment, one on each side. Fifth segment furnished with a sharp spine on the posterior margin near the median line; also a small spine on the lateral surface. Lateral faces of the first five segments sculptured by two irregular transverse furrows, sixth segment laterally with an indistinct longitudinal ridge. Pleura of first to fourth segments tri- angular, inferior angles blunt, without spines. Sternal crest low, dentate, terminating anteriorly in a spine, Dimensions.—Female, length 36.7 mm., length of carapace 11.5 mm., width of carapace between tips of antero-lateral spines 10.4 mm. Distribution.— Bering Sea, Aleutian Islands, and Alaska Peninsula, 35- 150 fathoms. ‘Taken by the A/atross at the following stations: Off Pribilof Islands, 54 and 150 fathoms, stations 3552, 3486. Pumicestone Bay, Unalaska, and vicinity, 35 and 59 fathoms, stations 3322, 3319- Off North Head, Akutan Island, 56 and 72 fathoms, stations 2841, 2842. Off south entrance to Akutan Pass, 45 fathoms, station 2843. Northwest of Unimak Island, 43 fathoms, station 3262. Portlock Bank, 51 fathoms, station 2857. Marmot Isle, Kadiak, 45 fathoms (Sharp). Genus Nectocrangon Brandt. KEY TO THE SPECIES OF NECTOCRANGON, A. Carapace with only two median spines behind the anterior margin. B. Carine of sixth segment of abdomen not terminating in a small sharp tooth orspine. . . | wi B’. Carine of sixth segment terminating in a small ‘sharp tooth or spine. C. All the abdominal segments carinated. D. Eyes with low tubercle. Spines of carapace appressed; those on anterior margin short. Hand Soogate, about five times as long as wide . «ies | SNe. D’. Eyes with elongated sharp ‘tubercle. Spines of carapace sub- erect; those on anterior margin long, slender. Hand shorter, only three and a half to four times as long as wide ovifer. C’. The first and second abdominal segments not carinated californiensis. A’. Carapace with three or four median spines behind the anterior mar- gin. B. Carinz of sixth segment of abdomen terminating posteriorly in a small spine. . . . . « @laskensis. B’. Carine of sixth segment of abdomen. not terminating posteriorly in a small spine. C. First to fourth segments of abdomen carinated . . . crassa. C’. First to fourth segments of abdomen not carinated. . &vior. DECAPODS 137 NECTOCRANGON LAR (Owen). Crangon lar OWEN, in Zoology of Capt. Beechey’s Voyage [of the Blossom], Crustacea, p. 88, pl. XXVIII, fig. 1, 1839. Argis lary KROYER, Naturh. Tidssk., Iv, 255, pl. v, figs. 45-62, 1842. Nectocrangon lar STIMPSON, Proc. Acad. Nat. Sci. Phila., 25; 1860.—ORT- MANN, Proc. Acad. Nat. Sci. Phila., 181, 1895. Lemale,—Carapace about two fifths or one third as long as the abdo- men; two spines on the median line, the distance between them being greater than the distance from the anterior spine to the anterior margin, and about equal to or less than the distance from the posterior spine to Fic. 74. Nectocrangon lar. a. Dorsal view of carapace andabdomen. @ (nat. size). Station 3642. 5. Side view of carapace and part of abdomen. ¢ (nat. size). Station 3642. ¢. Side view of abdomen. é (X 14). Station 3779. the posterior margin. Sometimes there is a tubercle behind the rostral spine. A low blunt irregular carina runs from the orbit nearly to the posterior margin; below this a spine on either side; a short antennal spine on the anterior margin. Blade of antennal scale exceeding the spine. Hands of first pair of feet from three and a half to four times as long as the width of the palm. The anterior margin forms an angle of about forty-five degrees with the side margins. First to fifth abdominal seg- ments furnished with a sharp median carina; sixth seg- ment with two sharp carinz, which toward the posterior end become lower and may disappear altogether in & a ¢ G. front of the posterior margin. Pleura of first four segments with rounded entire angles; fifth and sixth < ; Fic. 75. Nectocran- segments with an acute tooth or small spine at the gox lar (x 18). a. Aci- . . . ° cle. . ation 2. '. postero-inferior angles; sixth segment with a supero-Chela. 3. Station 3779. : F . ¢.Chela, ¢. Station 3642. lateral spine on each side of the posterior margin. Seventh segment with two blunt carine armed with three pairs of spin- ules on the terminal half. Dimensions.— Female, length 79.2 mm., length of carapace 21.5 mm. Male.—The male differs markedly from the female. It is much smaller. The eyes are considerably larger. The anterior margin of the hand is 138 RATHBUN more transverse, making the palm appear longer. The abdominal carine are higher and thinner, especially on the third segment; the in- fero-posterior angle of the fourth segment may have a small spine. The abdomen is more elongate, notably the sixth segment. Dimensions.— Large male, length 55.7 mm., length of carapace 13.6 mm. Distribution.— Arctic coast of Alaska and Siberia southward to Sitka and Kurile Islands; Greenland (Kréyer). Beach to 47 fathoms. In the U. S. National Museum this species is represented by numer- ous specimens ranging from the Arctic coast of Alaska and Siberia south- ward via Bering Strait to Bering Sea, lat. 56° 12’ oo’ N. Within these limits it is very abundant and was taken at 21 stations of the Albatross, at 8 stations by Lieutenant G. M. Stoney, U.S. N., at 7 stations by W. H. Dall, at 2 stations by the U.S. R. S. Corwin, off the mouth of the Yukon by E. W. Nelson, and at Cape Smith by the Point Barrow Expedition. Also taken at the following localities : Shahafka Cove, Kadiak, 12—14 fathoms (W. H. Dall). Sitka Harbor, 15 fathoms (W. H. Dall). Avacha Bay, Kamchatka (L. Stejneger and A/batross ; also recorded by Stimpson). Rakovaya Bay, Avacha Bay (A/batross). Off Kamchatka, 12-13 fathoms (A/bafross stations 3776, 3777, 3779; 80). of sont Island, Kurile Islands, 14-18 fathoms (A/dafross stations 3652, 653). of be Island, Okhotsk Sea, 18-20 fathoms, stations 3646, 3647. NECTOCRANGON DENTATA Rathbun. Nectocrangon lar SMITH, Trans. Conn. Acad. Arts Sci., v, 61, 1879 (part); not JV. /ar(Owen).—RATHBUN, The Fur Seals and Fur-Seal Islands of the North Pacific Ocean, Pt. III, 556, 1899 (part)—-HOLMES, Occas. Papers Calif. Acad. Sci., vII, 178, 1900 (part).—-ORTMANN, Proc, Acad. Nat. Sci. Phila., 1901, 164 (part). Nectocrangon dentata RATHBUN, Proc. U. S. Nat. Mus., XxIVv, 892, 1902. Fic. 76. Nectocrangon dentata. @ (X 14). Station 3216. a. Dorsal view of carapace and abdomen. 4. Side view of carapace and part of abdomen. DECAPODS 139 The typical Vectocrangon Jar is primarily an Arctic species, and is re- placed in the Aleutian Islands and the southern part of Bering Sea by a species which is very closely allied, and has been heretofore united with WV. ar. It differs chiefly in the carinz of the sixth abdominal segment terminating posteriorly in a small sharp tooth or spine. The hand is more elongate, being about five times or more than five times as long as its width across the palm. Dimensions.— Female, length 73 mm., length of carapace PY not: . dentata. g 1g mm., length of hand 10 mm., width of palm 2.1 mm. (x 12). ot Type locality.—Off Sitkalidak Island, Alaska, 69 fathoms ade ee * Chela. (Albatross station 2855). Distribution.—Bering Sea southward to Sitka and southeast coast of Kamchatka; Atlantic coast of North America from Greenland to Nova Scotia, 6 to 96 fathoms. From Bering Sea, in lat. 59° 55’ 00” N., southward to Aleutian Islands and Alaska Peninsula, at 65 stations of the A/batross, 21-93 fathoms. Southeast coast of Kamchatka, 96 fathoms (A/atross). Aleutian Islands eastward to Sitka Harbor, 6-80 fathoms (W. H. Dall). Plover Bay, Siberia, 10-25 fathoms (W. H. Dall). It will be noticed that the habitats of 1V. Jar and JV. dentata overlap in Bering Sea, that each is occasionally found at the extreme limit of the other’s range (¢.g., JV. Jar at Kadiak and Vancouver Island, and J. dentata at Plover Bay), and that JV. denéata extends into deeper water. The species recorded from the North Atlantic by Professor S. I. Smith, under the name J. Zaz, is, I think, identical with VV. dentfata. ‘The same form was collected by the Princeton Expedition at Greenland; specimens from Granville Bay are in the National Museum. 5 NECTOCRANGON OVIFER Rathbun. Nectocrangon lary RATHBUN, The Fur Seals and Fur-Seal Islands of the North Pacific Ocean, Pt. III, 556, 1899 (part). Nectocrangon ovifer RATHBUN, Proc. U. S. Nat. Mus., XXIV, 892, 1902. In the deeper waters of Bering Sea there lives another species of /Vecto- crangon closely allied to WV. Jar and JV. dentata. Like them, it bears two median spines on the carapace; the median crest is, however, higher, and the spines more ascending; the three spines of the anterior margin above the eyes are longer and more deeply separated from each other. The tubercle on the anterior surface of the eye is more prominent and acute; the eyes themselves are of greater size. The spine of the antennal scale extends away beyond the blade, much more so than the allied species. The pleon is relatively shorter than in JV. Jar and NV. dentata; the median carina in the female is higher; the carinz of the sixth segment end in a 140 RATHBUN small spine or tooth, as in JV. dentata. The median carina of the male is higher than in the female, but there is less difference than in the above Fic. 78. Nectocrangon ovifer. @ (nat. size). Station 3225. @. Dorsal view of carapace and abdomen. 46, Side view of carapace and part of abdomen. species. The hands are from three and a half to four times as long as their width across the palm, like those of VV. Jar. The eggs are larger than those of JV. Jar or WV. dentata, having a diameter of . 6 about 1.8 mm. as against 1.2 in JV. dentata. ( Dimensions.—Female bearing eggs, length 60 mm., | length of carapace 17.4 mm, Male, length 35.5 mm., Fic. 79. Wecto. length of carapace 9 mm. a. oe Dpe locality.—Off the Trinity Islands, Alaska, 159 tle *2 Chea fathoms (Adbatross station 2853). Distribution.— Bering Sea, from 57° 39’ oo” north latitude to Aleutian Islands and Alaska Peninsula as far as Kadiak, 56-368 fathoms, at 26 stations of the A/batross. The three foregoing species are not to be separated at a glance, but the examination of hundreds of specimens of each shows that the differ- ences here mentioned are constant. NECTOCRANGON CALIFORNIENSIS Rathbun. Nectocrangon californiensis RATHBUN, Proc. U.S. Nat. Mus., XxIv, 892, 1902. Allied to ZV. ovifer. Represented only by small specimens which differ from specimens of JV. ovifer of equal size. The anterior margin outside the orbital fissure is fur- 5 2 te nished with two spines =~ \( AE close together, instead of ; ig ( ) (= 2 a one in the allied species. oa | INS The eyes aré smaller than in WV. ovifer, VED 7A but have a prominent tubercle. The - spine of the antennal scale extends only i ee slightly beyond the blade. The hands ,)",22..% eT ere oF cae are from three and a half to four times P#°¢ 2d abdomen. 4. Side view. as long as wide; they have the spine situated nearer the proximal end DECAPODS ; 141 than in JV. ovifer, and the anterior margin (against which the dactylus fits) in consequence more longitudinal. The first and second abdominal segments are without a ¢ carina; that on the third and fourth segments is rather feebly developed. Dimensions.—Male, length 31 mm., length of carapace Fic. 81, Nec tocrangon cali« 8.6 mm. Jorniensis (X Type locality.—Off Santa Catalina Island, California, 80 33) | Station fathoms (Albatross station 3664). » Chela. Additional localities.—Off Santa Cruz Island, California, 155 fathoms, station 2949; south of Santa Catalina Island, 59 fathoms, station 3665 (specimen 39 mm. long). NECTOCRANGON ALASKENSIS Kingsley. Nectocrangon alaskensis KINGSLEY, Bull. Essex Inst., XIv, 128, 1882. Female,—Three equidistant spines on the median carina, and between these and the spine on the anterior margin there is usually a small spine. Lateral carina scarcely traceable. Antennal spine large. Spine of an- Fic. 82. Nectocrangon alaskensis. (x 14). _@. Dorsal view of carapace and abdomen. Station 2869. 4. Side view. Station 2868. tennal scale overreaching the blade. Hands of first pair of feet about four and a half times as long as wide, anterior margin longitudinally oblique. Sternal crest in the male armed with slender spines. First to fourth abdominal segments smoothly rounded; fifth having a ’ sharp median crest ending posteriorly in a sharp spine, and a spine at the postero-inferior angles ; sixth segment with two sharp crests terminating in small spines; the posterior margin has wiis.,83. also a large supero-lateral spine, and a small infero-lateral a spine. tie Station —§_Male.—Smaller than the female. The spine at the antero- cle. Chela lateral angle is much longer than in the female, considerably overlapping the antennal scale. The scale is a little longer also. The a 142 RATHBUN first to fourth segments of the abdomen have a median carina, usually sharp and high on the first three segments but not extending the full length of each segment. Dimensions.—Female, length 66.5 mm., length of carapace 17.7 mm. Male, length 44.3 mm., length of carapace 11.2 mm. Distribution.—From Bering Sea, near the Pribilof Islands, to Oregon, including Puget Sound, 24-121 fathoms. Taken by the Albatross at 38 stations. Also collected by W. H. Dall at the following localities: Iliuliuk, Unalaska, 3-6 fathoms; Captains Bay, Unalaska; Shahafka Cove, Kadiak. NECTOCRANGON CRASSA Rathbun. Nectocrangon crassa RATHBUN, The Fur Seals and Fur-Seal Islands of the North Pacific Ocean, Pt. Ill, 556, 1899. Female,—Body stout. Carapace more than one third the length of the abdomen; three strong equidistant spines on the median carina; between the first of these spines and the spine on the ante- + rior margin there is a small tooth ‘ eee or spinule. Lat- \ eral carina well marked. Antennal spine not reaching the antennal scale. Spine of scale extending well beyond ? the blade. aig eters ore» 000, Si The hand of the first pair of feet is domen. 4. Side view. a little more than three times as long as wide; its anterior margin is longi- tudinally oblique; the spine is short and stout. Sternal crest of male armed with spines. Abdomen slightly sculptured; first to fifth segments furnished with a (( (| blunt median carina; sixth and seventh segments having two carine, those of the sixth segment converging and disappearing toward the posterior margin; this margin has Pie 3s Nee a large lobe at the supero-lateral angles; the fourth, fifth, aS Sta and sixth segments have a small tooth or spine at infero- cle. “4. Chela. posterior angles. Male.—Smaller and more slender than female; abdominal carine stronger. Dimensions. —Female, length 48.5 mm., length of carapace 13 mm. DECAPODS 143 Distribution.—Bering Sea and Aleutian Islands, 11% to 55 fathoms at 24 stations of the A/batross,; Aleutian Islands to Sitka, 5 to 28 fathoms, at 10 localities (W. H. Dall); Alaska (U.S. R. S. Corwin), one specimen ; Bering Island, some specimens taken from the stomach of Gadus macro- cephalus (N. Grebnitzky). NECTOCRANGON LEVIOR Rathbun. Nectocrangon levior RATHBUN, Proc. U.S. Nat. Mus., XxIv, 892, 1902. This species is very close to JV. crassa. The first four abdominal seg- ments are non-carinate, except for a short feeble elevation on the first; the first segment has a median tubercle; and - the pleura of all the segments have shallow depressions suggestive of the sculpturing of WV. crassa, the carinz of the fifth and sixth segments are less clearly marked than in J. crassa. ee > Medeiaie Maun... ithe Dimensions.— Female, length 47.7 mm., 72). wooed ceutiad he ease length of carapace 13.1 mm. Distribution.—This species is more rare than JV. crassa and extends farther south. One female was taken in Admiralty Inlet, Puget Sound, 40 fathoms, station 2865, by the Albatross, and serves as the @ ff type. Another female was dredged off Cape Beale, Vancou- ver Island, in 34 fathoms, station 2880. One female from ia tacit Portlock Bank, 68 fathoms, station 2856. Six females and sagas Yevi- one male come from Davidson Bank, south of the Aleutian & (X 1%). Station se 5 Islands, 42 fathoms, station 2845. One or two specimens Chela. were taken by Dr. Dall at each of the following localities: Port Levashef, Unalaska, 20-30 fathoms. Semidi Islands, 12-28 fathoms. West side Middleton Island, 10-12 fathoms. Genus Paracrangon Dana. PARACRANGON ECHINATA Dana. Paracrangon echinatus DANA, Proc. Acad. Nat. Sci. Phila., 1852, -p. 20; Crust. U. S. Expl. Exped., 1, p. 538, 1852, pl. XXxXIII, fig. 6, 1855. — HOLMES, Occas. Papers Calif. Acad. Sci., vil, 176, pl. 11, figs. 36 and 37, 1900, and synonymy. Carapace furnished with a median carina unequally foinitoothied: Rostrum long, obliquely erect; posterior margin with one tooth near the 144 RATHBUN middle, anterior margin with one tooth near the tip, and at base a long curved spine. Sides of carapace carinated in such a way as to form irregular quadrangular spaces, with spines at most of the angles; four or five of these spines form an irregular lateral carina, the anterior spine being much the longest, about four fifths the length of the rostrum. On the anterior margin of the carapace there is a spine at the outer angle of the orbit and another at the antero-lateral angle. The antennular peduncle is two thirds as long as the carapace; the second segment is more than twice as long as the third; the basal scale is very short and ovate; the outer flagellum is very much stouter and twice as long as the inner. ‘The antennal scale is as long as the antennular peduncle but not so long as the antennal peduncle; the laminar portion projects consider- ably beyond the short, stout outer spine; the outer margin is slightly concave. The flagellum when bent back reaches the sixth abdominal segment. The maxillipeds reach beyond the antennal peduncle by half the length of the dactylus. The first pair of feet are about as long as the maxillipeds; the upper margin of the merus terminates distally in a tooth; the hands are narrow-elongate, about four times as long as wide; the digital spine is very long and slender and directed in an obliquely longitudinal direction; the anterior margin is more longitudinal than transverse. The third pair of feet (it is to be borne in mind that the second pair are absent) are very slender and barely reach to the end of the first pair; the fourth and fifth pairs are of about equal length, and stretch a little beyond the first pair. The abdomen behind the second segment is carinate, the carina of the third segment being especially high; on the sixth and seventh seg- ments it is medially sulcate. The first to fifth segments are deeply sculptured with transverse grooves, and their inferior margins are pointed, those of the fourth and fifth segments being sharply so. In the male the pleura are much more spiniform than in the female. The fourth segment has on each side of its posterior margin a blunt tooth; the fifth segment has a corresponding spine. The sixth segment has on each side two lateral and one posterior spine. The telson is armed with two small spines at the proximal end, and three pairs of lateral spinules on the terminal half. The outer uropod is shorter than the inner, is obliquely truncated at the end, and has a broad blunt tooth at the postero-lateral angle. The median ventral line of the pleon is armed with very long spines. Dimensions.— Female with eggs, length of body measured from tip of spine at anterior base of rostrum 47.4 mm., length of carapace from same point 16 mm., length of carapace from posterior line of orbit 12 mm. DECAPODS 145 Distribution.—Port Etches, Alaska, to Puget Sound;1 Japan. Port Etches, Alaska, 12 to 18 fathoms (W. H. Dall), one specimen. Dredged by the A/bazross in the Straits of Fuca in 40 to 48 fathoms at stations 2864, 3464, and 3465, and in Puget Sound in 4o fathoms, station 2865. Puget Sound (T. Kincaid). Puget Sound, Oregon, dredged (Dana). McLaughlin Bay, Campbell Island, 10-30 fathoms (Whiteaves). Vancouver Island (Smith). North of Japan, lat. 44° 27/ 00” N., long. 141° 22/ oo” E, (Miers). Family SERGESTIDA. Genus Sergestes Milne Edwards. KEY TO THE SPECIES OF SERGESTES. A. First joint of antennular peduncle only slightly longer than third joint. Rostrum spiniform. Cornea larger than eye-stalk. . adlanticus. A’. First joint of antennular peduncle considerably longer than third joint. Rostrum lobiform. Cornea no larger than eye-stalk, sp. indet. SERGESTES ATLANTICUS Milne Edwards. Sergestes atlanticus MILNE EDWARDS, Ann. Sci. Nat., xIx, 349, 1830; Hist. scl Crust., 11, 428, 1837.— HANSEN, Proc. Zool. Soc. London, 1896, 949 Seo vest visit KROYER, Kongel. Danske Vidensk. Selsk. Skr., 5 Rakke, naturvidensk. mathem. Afd., Iv, 235, pl. 1, fig. 1, 1859. ter pacificus STIMPSON, Proc. Acad. Nat. Sci. Phila., x11, 45 [114], Distribution.— North and South Atlantic, North and South Pacific, and Indian Oceans: North Atlantic: Northward to 42° (Hansen); various localities, from off Chesapeake Bay, 2425 fathoms, southward (Bate); Sargasso Sea, 500 to 700 meters (Ortmann). South Atlantic: Off Monte Video, 600 fathoms (Bate); South Equa- torial Stream (Ortmann). North Pacific: Lat. 27%° N., long. 138° E. (Stimpson); China Sea (Hansen); off Japan, 345 fathoms (Bate). Specimens were taken by the Albatross, as follows: Off Destruction Island, Washington, 516 fathoms, station 3343. Off Sea Lion Rock, Washington, 477-636 fathoms, stations 3070, 3072, 3°73- 1 The locality ‘* California” attributed to Miers is probably an error, as he appa- rently considered Puget Sound as on the Californian coast, and the specimens in the British Museum which were received from the Smithsonian Institution were undoubt- edly from Puget Sound. (See Proc. Zool. Soc. London, 1879, 52.) 146 RATHBUN Off Cascade Head, Oregon, 345 fathoms, station 3347. Off Point Arena, California, 239 fathoms, station 3349. Off Farallone Islands, 552 fathoms, station 3162. South of Farallone Islands, 217 fathoms, station 3105. Off Monterey Bay, 418 fathoms, station 3127. Off San Luis Obispo Bay, 252 fathoms, station 3195. Off Point Conception, 233 and 284 fathoms, stations 2891, 2892. Santa Barbara Channel, 322 and 314 fathoms, stations 2903, 2904. Gulf of California, northwest of Tiburon Island, 145 fathoms, station 3or5. South Pacific: Lat. 15° S., long. 109° 20’ E. (Hansen); off Fijis, 315 fathoms (Bate); south of Australia, 2150 fathoms (Bate). Indian Ocean (Hansen). Size.—The largest specimen examined (station 3195) measures 52 mm. ; the average length is about 40 mm. There is no indication on any of the labels that the specimens came from the surface or from any inter- mediate depth. Common at surface, where no specimen exceeds 30 mm. (Hansen). At 600, 2150, and 345 fathoms, specimens measure 38, 43, and 50 mm. respectively (Bate). SERGESTES sp. indet. A single mutilated female Sergestes, without maxillipeds or trunk-legs, was dredged by the A/datross in 417 fathoms off San Diego, California, station 2928. Itresembles S. mollis Smith. Body stout; length about 38 mm. ‘The rostrum and anterior outline are as in that species. There is a minute hepatic spine. A strong ridge runs from the anterior margin at the outer edge of the eye-stalk backward to the posterior margin; the front part of the ridge is higher up than in S. mo/lis ; at its middle the ridge gives off a weaker branch directed obliquely downward and back- ward, and then backward to the posterior margin. Gastro-cardiac groove deep; cervical groove present. Eyes a little shorter than in S. mollis, reaching 3% the length of the first antennular segment; cornea brown. Antennular peduncle rather stout, first joint the longest, 134 times the second joint; second and third subequal; notch in outer side of first seg- ment very slight. Antennal scales broken off. Abdomen asin 5S. moliis. Telson broken off. No hairs visible on outer margin of outer uropod. Family PENZIDZ. Genus Penzus Fabricius. PENZUS BREVIROSTRIS Kingsley. Peneus brevirostris KINGSLEY, Proc. Acad. Nat. Sci. Phila., 1878, 98. Penaeus californiensis HOLMES, Occas. Papers Calif. Acad. Sci., vi, 218, pl. Iv, figs. 64-69, 1900. 2 Penaeus brevirostris RATHBUN, Proc. Wash. Acad. Sci., Iv, 287, 1902. DECAPODS 147 Distribution.—San Francisco Bay, California, to Panama; Galapagos Islands. To a depth of 5134 fathoms. Taken by the Albatross at the following localities: Magdalena Bay, Lower California; off Santa Margarita Island, Lower California, 47 fathoms, station 3039; Gulf of California, 94-33 fathoms, stations 2823, 3013, 3022, 3025, 3031, 3037; also at Guaymas; Concepcion Bay, mouth of Rio Mulege; Algodones Lagoon; and La Paz Harbor. Panama; Panama Bay, 29%-51¥% fathoms, stations 2795, 2799, 2804, 2805. : Genus Benthesicymus Bate. BENTHESICYMUS TANNERI Faxon. Benthesicymus tanneri FAXON, Bull. Mus. Comp. Zool., XXIV, 215, 1893; Mem. Mus, Comp. Zool., XVIII, 205, pl. H, 1895. Distribution.— From off San Diego, California, to Ecuador; Galapagos Islands. 331-1322 fathoms. The Albatross has collected this species at the following socialites, besides those cited by Faxon: Off San Diego, 822 and 623 fathoms, stations 2923, 2929. Gulf of California, 857 and 1005 fathoms, stations 3009, 3010. Off Cape San Francisco, Ecuador, 401 and 741 fathoms, stations 2792, 2793- Galapagos Islands, 634 and 392 fathoms, stations 2808, 2818. Genus Gennadas Bate. GENNADAS BOREALIS Rathbun. Gennadas borealis RATHBUN, Proc. U.S. Nat. Mus., xxIv, 887, 1902. Submembranous, glabrous. Rostrum reaching at least half-way along the eye-stalk, sometimes to the cornea, armed with a single tooth, carina very distinct nearly to the posterior border of the cara- pace, but sharpest in front of the cervical groove. There is a sharp marginal spine at the angle of the antero- lateral sinus. Eyes light brown, globu- : ik oot Fic. 88. Gennadas borealis. 9%. Station 3783. a. Side lar, having“a speck of black view of carapace (X 2). 4. Thelycum (X 5). pigment near their base on the outer margin of the stalk; tubercle large and acute. Antennular flagella broken, the upper one thick at base. The antennal scale extends beyond the antennular peduncle by about the length of the last segment of the peduncle. Antennal flagellum as long 148 RATHBUN as body. The dactylus of the external maxillipeds is subspatulate, fully twice as long as broad. The chele of the first pair of feet are narrow and elongate, as in the succeeding pairs. Exopodites of first abdominal appendages not so long as the carapace; between the bases of these appendages is a sharp spine, equally devel- oped in both sexes. The thelycum consists of a horizontal convex sub- triangular plate or tubercle, placed between the third pair of legs, followed by two transverse plates between the fourth and fifth pairs. The anterior of these two plates is subquadrilateral, narrowest in front; the posterior one is somewhat fan-shaped, narrow behind, its anterior margin b rounding and with a blunt median point. The andricum or petasma consists of a pair of small _ leaves not in contact, each of which is attached at Pha Pe. Gennadas borealis. P ons ° . Station mn 3783. @. Petasma its proximal end. At extremities of distal margin ia 3 P** are two lobes or teeth, the outer one of which is curved. The inner portion is partially folded to form an irregular longi- tudinal plait. The sixth abdominal somite is carinate; it is more than twice as long as the fifth. The telson has a small lateral spine at its posterior fourth, two spines at the tip. The caudal swimmerets are broken in all our specimens. Dimensions.—Male, length of carapace and rostrum 13.6 mm., length of abdomen on middle line 29 mm. Female, length of carapace and rostrum 18 mm., length of abdomen on middle line 37 mm. Distribution.— North of Rat Islands, Aleutians, 850 fathoms (A/da- tross station 3784), 2 ; off Copper Island, Kamchatka, 1567 fathoms, station 3783 (type locality), 14,29. Very near G. farvus Bate, but differs in the longer rostrum, the presence of a lateral spine on the telson, the greater length of the anten- nal scale, the elongated chelz of the first pair of feet, and the different form of the thelycum and andricum. A specimen of Gennadas was dredged by the Albatross off San Diego in 417 fathoms, station 2928, but it is so badly mutilated that it is im- possible to say whether it is the same species as the above or not. Family PALINURIDA., Genus Panulirus White. PANULIRUS INTERRUPTUS (Randall). Distribution.—Southern California to Mexico. In the National Mu- seum are specimens ranging from Santa Barbara, California, to Rosalia Bay, Lower California. DECAPODS 149 Family 4X//DZ. Genus Axius Leach. AXIUS SPINULICAUDA Rathbun. Axius spinulicauda RATHBUN, Proc. U. S. Nat. Mus., XxIv, 886, 1902. Carapace (rostrum included) measured in the middle line, as long as the first 5 abdominal somites, cervical groove deep, branchial groove indistinct. Gastric region traversed by 5 carinz, all of which fade out before reaching the cervical groove; the median extends along the basal third of the rostrum and is armed with 4 spines just behind the line of Fic. 90. Axius spinulicauda. @ (2). Station 3172. a. Carapace and antenne. 4d. Swimming-fan. the orbits; the posterior of these spines is broken off in the unique type ; the outer carine are a continuation of the side margins of the rostrum ; they, as well as the shorter intermediate carine, are unarmed. The sur- face is covered with rather distant scabrous granules. In front of the narrow median posterior lobe, the surface is compressed or pinched to form a short smooth ridge. The rostrum reaches the middle of the second joint of the antennular peduncle, is slightly deflexed, longitudinally channeled, sharp-pointed, armed with 5 spines on one side and 6 on the other. Eyes black, of the same diameter as the stalk, not reaching the middle of the basal antennular segment. ‘The basal expansion of this segment has convex side margins, an antero-external spine, and reaches just beyond the middle of the segment; the second segment is a little longer than the third, and the two together are shorter than the first. ‘The entire pe- 150 RATHBUN duncle extends to the middle of the penultimate joint of the antennal peduncle. The outer flagellum is almost as long as the carapace and rostrum; the inner is a fifth longer than the outer. The scaphocerite projects as far as the middle of the second antennular segment, while the stylocerite projects to the end of the penultimate joint of the anten- nal peduncle; this joint is nearly 3 times as long as the last joint. The flagellum is broken off, but the part remaining reaches beyond the anten- nular flagella. The outer maxillipeds reach the end of the antennal peduncle. The first pair of chelipeds are missing. The second pair are rather narrow; the merus has 3 spines on its lower margin; the carpus is half as long as the merus and three fourths as long as the propodus; palm and fingers © subequal ; lower margin of merus, carpus, and propodus fringed with long hair. The third to fifth pairs of feet are slender; the lower margin of the distal half of the propodi is fringed with long hair; the dactyli are slender, those of the third and fourth pairs contained 3 times in their propodi, those of the fifth pair contained 4 times in their propodi. The abdomen is smooth above, but the pleura are sculptured and pubescent; the telson is elongate, subquadrilateral, lateral margins spinulous, dorsal surface with a few spines; caudal swimmerets about as long and as broad as the telson; inner one with two outer marginal spines, carina spinulous; outer branch with serrate outer margin, outer carina with 1 or 2 spinules, obliquely transverse suture bordered by slender spinules. Dimensions.—In the unique type, a female, the length of the carapace and rostrum along the median line is 19.6 mm., length of rostrum 3.5 mm., of abdomen 31.5 mm. Type locality.—Off Bodega Head, California, 62 fathoms (Albatross station 3172). From the other species on the west coast of North America, viz., Axius crista-galli Faxon and A. acutifrons (Bate), both of which occur off Pana- ma, A. spinulicauda is readily distinguished by the five gastric carine and the black eyes. Genus Calastacus Faxon. KEY TO THE SPECIES OF CALASTACUS. A. Carapace granulate; no spines behind those at base of rostrum, investigatoris. A’, Carapace not granulate; 5 rows of spines behind the rostrum, guingueseriatus, DECAPODS 151 CALASTACUS INVESTIGATORIS Anderson. Calastacus investigatoris ANDERSON, Jour. Asiatic Soc. Bengal, LXV, Pt. II, 97, 1896. Illustrations of the Zoology of the Investigator, Crustacea, Pt. Iv, pl. XXv, fig. 1, 1896.—ALCOCK, Descriptive Catal. Indian Deep-Sea Crust. Dec. Macr. and Anom. in Indian Mus., 191, 1901. - Distribution.—Taken by the ), in his description of P%. minor, says (p. 14): “ This species is closely similar to P. maxillare, of which it may be a dwarf variety”; and in a later paper (’80, p. 481) he adds that since the publication of the first paper “4 much larger series of specimens has been obtained, which shows con- clusively that the two forms cannot be separated, though extreme forms appear very unlike.” Thus if Pt. maxillare is a synonym of Lh. femo- ratum it leaves but two species, PA, femoratum and Ph. robustum, to be referred to this genus. PHOXICHILIDIUM FEMORATUM (Rathke). Plate x11, fig. 10; plate xxiv, figs. 1-5. Nymphon femoratum RATHKE, 1799, p. 201. Orithyia coccinea JOHNSTON, '37, p. 378, pl. XII, figs. 4-6. Phoxichilidium coccineum MILNE EDWARDS, 749, p. 536. Phoxichilidium coccineum GOODSIR, ’44, p. 2, pl. 1, figs. 6-8. ? Phoxichilidium globosum GOODSIR, ’42, p. 136, pl. Ill, fig. I. Phoxichilidium femoratum KRGOYER, '45, p. 122. Phoxichilidium femoratum KROYER, ’49, pl. XXXVIII, fig. 2, a-g. ? Phoxichilidium femoratum HOEK, °77, p. 6, Tab. Xv, figs. 8-Io. ? Phoxichilidium femoratum HOEK, ’81», p. 512, pl. XXVI, figs. 18-21; pl. XXVII, fig. 19. Phoxichilidium femoratum HANSEN, ’84, p. 650. 284 COLE Phoxichilidium femoratum HANSEN, ’85, Tab. vil, fig. 21. Phoxichilidium femoratum G. O. SARS, 788, No. 4. Phoxichilidium Jemoratum G. O. SARS, '91, pp. 21-24, pl. Il., fig. 1, a—g. Phoxichilidium maxillare STIMPSON, ’54, p. 37. Phoxichilidium maxillare WILSON, ’7%>, pp. 12, 13, pl. IV, figs. 1a—re. Phoxichilidium maxillare WILSON, '80, pp. 480, 481, pl. Ill, figs. 12-15. Phoxichilidium minor WILSON, '78", pp. 13, 14, pl. IV, figs. 2a—2f. Trunk cylindrical, tapering somewhat posteriorly ; sutures well defined. Lateral processes about as long as width of trunk, well separated ; except last pair, issuing from the middle of their respective trunk segments. First trunk segment longer than succeeding ones. Caudal segment comparatively small, oval or oblong, unarmed. Eye tubercle situated ahead of middle of first trunk segment, small, obtusely conical, the 4 eyes nearer the base; the posterior pair lower than the anterior. Proboscis about the length of the first and second trunk segments together; cylindrical or somewhat clavate, being larger distally ; obtusely truncate, with a circular constriction near the distal end. It arises somewhat ventrally from the first trunk segment; the ventral border starts obliquely downward, but soon bends forward at an obtuse angle. Chelifori comparatively powerful, considerably longer than proboscis. Scape cylindrical or somewhat claviform; chela movably connected to it, usually carried somewhat downward, so as to overhang the proboscis ; oval, smooth. Fingers powerful, about as long as palm; strongly curved, leaving an open space between, even when closed; the movable finger the longer and overlapping the other without crossing. Ovigera strong, about equal in length to the body. First joint short, about one and a half times as long as broad; 7.2 of smaller diameter, somewhat less than twice as long as first, and about equal to fourth; 7.3 longest, two and a half times 7.1, curved slightly dorsalward, with a de- cided constriction at about one fourth of its length from the proximal end; 7.4 curved ventrally; 7.5 large, nearly as long as 7.4, broad, com- pressed, arcuate, the appendage as a whole forming a sigmoid curve. On the basal half of the inner margin of this joint there are 3 closely set unguiform spines, while at either side occurs a set of feebler ones; other joints sparingly beset with exceedingly small, simple spiniform bristles. Legs comparatively robust, two and one half to three times the length of the animal, smooth, except for microscopically minute spines. First coxal joint short, nearly square; ¢.2 more than twice as long as ¢.1; ¢.3 shorter again. Femoral joint longest, swollen in the female; tibial joints of about equal length, somewhat shorter than f and about as long as coxal region; both of less diameter than /, and the second smaller PYCNOGONIDS 285 than the first. First tarsal joint very small, triangular, terminating dor- sally as a small lappet, and slightly convex ventrally, where it is beset with a few slender bristles. Second tarsal joint beset with short spiniform bristles; the ventral (‘inner’) side is somewhat lamellarly expanded at the base, and is here armed usually with 6 strong, anteriorly curving spines, the 2 distal ones in most cases being in juxtaposition. Claw powerful, slightly curved, about half as long as ¢s.2; aux. cl. very small, though distinctly developed. At the distal end of f are 1 or 2 strong bristles, and another projects from a slight depression on the dorsal side of #2, a short distance from its distal end. SPECIMENS EXAMINED. Lot. Locality. No. of specimens. Date. Source. 3 Dutch Harbor, Un- | 17,19 July, 1899 H. A. E. (Prof, alaska W. R. Coe) Popof Id., Shumagin | Io! July, 1899 H. A. E. (Prof. Group, Alaska T. Kincaid) 8 Popof Id., Shumagin | 40’, 19 July 8, 1899 H. A. E. (Prof. Group, Alaska } W. E. Ritter), Univ. of Calif., 24 Orca, Prince William No. 19,512 Sound, Alaska If | June, 1899 Tks Diy Bos Distribution.—lf all the synonyms given above properly belong to this species its distribution covers a great range. It has been found along the coasts of the British Isles, Holland, Denmark, Norway, Green- land, the eastern coast of North America as far south as Massachusetts, and the present record extends its range to the western coast of North America from Orca to Unalaska. It ranges in depth from the shore rocks to 100 fathoms (Sars). Apparently it is a truly circumpolar species. Remarks.—The specimens which I have examined from the Alaska coast agree very closely with the excellent description of this species given by Sars. They are, however, most of them considerably larger, the smallest specimen, from Orca, measuring about 3.5 mm., those collected at Popof Island 4.5 mm. to 5 mm., and those from Dutch Harbor 5.5 mm. from the tip of the proboscis to the tip of the caudal segment. Sars describes the color as “a more or less vivid red,” or “sometimes dark- brownish or a sepia tint.” Most of the Alaska specimens (alcoholic) are lighter than this, especially those from Dutch Harbor, which are a light brown or yellowish; the specimens from the Shumagins are a darker brown, and in 2 or 3 of them the branches of the intestine in the legs _1“Undershore rocks,” 286 COLE show up very plainly as dark brown lines. Wilson says of “Ph. maxillare" that the color is “ blackish or sepia to nearly pure white.” In the armature of the tarsal joints I find some variation from the description and figures of Sars. On the first I do not find one spine noticeably longer than the others, but a regular gradation up to the long- est. In the majority of cases the second agrees with the description, but in various specimens the number of spines on the heel varies from 5 to 7, and the distal two are not always opposed to one another. The num- ber and arrangement may vary on the different legs of the same specimen. Genus Halosoma! gen. nov. Trunk rather stout; lateral processes broad, first 3 pairs closely crowded; fourth pair separated from third by a space. Neck short but projecting somewhat beyond base of proboscis, which issues ventro-an- teriorly from the first segment. Chelifori strong, chelate. Ovigera ? Legs rather stout; second tarsal joint with expanded heel and a thin, chitinous, knife-like ridge along the sole. Claw well developed; auxil- iary claws minute. Remarks.—It was only after considerable hesitation that the present genus was instituted, as it is based upon a single specimen, and that evi- dently a female, though no ova could be made out in the ovaries. It seems, however, especially in the greater concentration, producing a stouter trunk and closely approximated lateral processes, to be generically distinct from both Phoxichilidium and Anoplodactylus; in the moderate development of the ‘neck,’ on the other hand, it is intermediate between those genera. It is ‘unfortunate that the specimen does not possess ovigera, as the structure of those organs would help much in showing the position of this genus and its relation to the other genera. Should it prove to be an immature specimen which has not yet developed the ovigera, it is possible that it may be found to be related to the Pallenidx rather than to the Phoxichilidiide. In either case the only thing to be done with it now seemed to be to describe it as a separate genus under the Phoxichilidiide, treating it as an adult female, until its true position can be determined by future collections. HALOSOMA VIRIDINTESTINALIS sp. nov. Plate xiv, fig. 11; plate xxrv, figs. 6-8; plate xxv, figs. 1-4. ZType.—University of California, No. 19,513, Dillon’s Beach, Sonoma County, California. Trunk stout, compressed; sutures deep and well marked ; first segment 1From ddws, disc, and oGyua, body. PYCNOGONIDS 287 about two and one half times as long as second. Lateral processes about as broad as long, a slight protuberance on the dorsal side distally ; the first 3 pairs closely crowded; between the third pair and the fourth, which is directed posteriorly, is a considerable space, about half as wide as the process. First trunk segment projecting forward beyond the base of the proboscis a short distance, producing a thick neck, of moderate length. Caudal segment rather long, over half as long as first trunk segment erect, subcylindrical, rounded at apex. Eye tubercle about in the middle of the anterior half of the first trunk segment, directed slightly forward, shorter than caudal segment, conical; eyes at about the middle, large. Proboscis issuing from the antero-ventral side of the first segment, as long as first and second trunk segments together, thick (half as long as broad), cylindrical, obtusely truncate, with a circular constriction near the distal end; ventral border with a projecting angle at the proximal end. Chelifori stout, overhanging proboscis; scape reaching to about even with end of proboscis, slightly clavate; chelze hanging downward almost vertically, with the movable finger on the outside. Palm slightly swollen; immovable finger slender, about as long as palm, slightly curved; mova- ble finger slender, acuminate, arcuate. Ovigera? Legs rather stout: ¢.1 short, squarish ; ¢.2 nearly double ¢.1, swollen on the ventral side, where genital pore is situated on posterior pairs; ¢.3 slightly longer than ¢.1; f about as long as coxal region, stout; #1 some- what shorter than f; 4.2 equals 41; 4.1 very short, irregularly triangular or squarish, with a few small spines on the ventro-distal corner; 45.2 over half as long as 7.2, somewhat arched, with a distinct heel at the base. Heel armed with 2 strong curved spines and 5 or 6 smaller ones; sole with a thin lamellar chitinous membrane (pl. xxv, fig. 4), in which are some 10 or 11 small spines; c/. equals about three-fourths of #s.2, nearly straight, inner margin slightly convex at middle; aux. c/, minute. The femoral and first tibial joints have slender bristles projecting from slight protuberances on the dorsal side and at their distal ends; 7.2 has a similar bristle a short distance from the distal end. Otherwise the legs are smooth except for a few microscopic hairs, as is the whole body. Integument thin and transparent, the light green intestine with its prolongations into the legs showing through very distinctly, making the animal appear of a greenish color. Intestine considerably dilated in femoral joint. Cuticular cavities not so numerous as in related genera. Length but slightly over 1 mm. ; first leg about 3.5 mm.; extent 7.5 mm. 288 COLE SPECIMEN EXAMINED. Lot. Locality. No. of specimens. Date. Source. 28 Dillon’s Beach, I 2 (?) Nov. 26, 1898 Univ. of Calif. Sonoma Co., Calif. Remarks.—This single specimen was in a vial with Lecythorhynchus marginatus and Ammothella tuberculata. No data as to depth were given, but they were probably all taken in shallow water. It has the general appearance of a Phoxichilidium-like form, but is distinguished by its short, stout body and crowded lateral processes. Genus Anoplodactylus Wilson (’78#). Phoxichilidium (in part). Trunk rather slender, with the first segment constricted anteriorly and extending forward some distance beyond the base of the proboscis, thus producing a long narrow neck. Lateral processes comparatively long and well separated. Proboscis projecting obliquely downward from ven- tral side of first trunk segment. Eye tubercle at extreme forward end of the segment. Chelifori comparatively feeble. Ovigera slender, 6-jointed; terminal joint very small. Egg-masses several, globular (A. petiolatus et erectus), or one or two, loose and more or less irregular in shape (A. /entus). Legs long, slender; first tarsal joint very short; ven- tral margin of second tarsal joint projecting at the base (the heel) and there armed with strong spines; auxiliary claws minute.) Remarks.—This genus can readily be distinguished from Phoxichilidium, which it much resembles in general appearance, by the long, projecting neck, the feebler chelifori, and the 6-jointed ovigera with the ultimate joint very much smaller than the penultimate. Hoek (’98) lists the species which he considers as properly belonging to this genus. Besides the new species described below, I think the following should be added to his list : 1 A. gestiens (Ortmann) = Phoxichilidium gestiens Ortmann,’91. Japan. A. plumularia (von Leadenfeld) = Phoxichilidium plumularie von Lendenfeld, ’°83. Port Philip, Australia. A. tubiferus (Haswell) = Phoxichilidium tubiferum Taswell, °85. Port Jackson, New South Wales. 1In a recent paper Mébius (:02) has referred two new species to the genus Anoflo- dactylus, viz., A. aculeatus and A. spinosus. The latter differs from the established genus in having 9-jointed ovigera, but in this connection Mébius says (p. 187): “*Ich stelle fiir Anoplodactylus spinosus mit 9-gliedrigen Brutbeinen keinen neuen Gat- tungsbegriff auf, sondern scheide aus dem WILSON’schen Begriff Anoplodactylus das Merkmal einer bestimmten Gliederzahl der Brutbeine aus.” PYCNOGONIDS 289 ANOPLODACTYLUS ERECTUS sp. nov. Plate xiv, fig. 12; plate xxvI, figs. 1-9. Dype.— Sand ¢?, University of California, No. 19,514, San Diego, Cal- ifornia. : Trunk rather slender, cylindrical, tapering posteriorly ; lateral processes long, well separated, larger distally, where each has a small conical pro- jection on the dorsal side and pointing somewhat outward. First trunk segment rather larger than the 2 following segments together; constricted in its anterior half and produced forward into a long narrow neck. Caudal segment moderately long (nearly one and a half times second trunk segment); projecting upward at a sharp angle; approximately cylindrical, tapering to a point, often bulging somewhat in the middle, notched at tip; may be armed with 1 to 2 or 3 hairs on each side. Eye tubercle placed at extreme forward end of first trunk segment _ and projecting upward and a little forward; about as long as second trunk segment, cylindrical. Viewed from the side it rounds evenly to a blunt point; viewed anteriorly or posteriorly it is seen to have a project- ing angle on each side at the point of narrowing. Eyes nearer the top of the tubercle than the base; the anterior pair somewhat larger and a little lower than the posterior. Proboscis about as long as first trunk segment, from the posterior part of which it issues ventrally and projects obliquely downward and forward ; basal portion of slightly smaller diameter than the distal; truncate. _ Chelifori extending forward from the extreme end of the first trunk segment, which furnishes but a slight projection beyond the eye tuber- cle for their attachment; about equal in length to the segment to which they are attached. Scape slender, nearly cylindrical, only slightly enlarged at distal end; smooth except for a few small hairs. Chela pendant, bent at nearly a right angle to the scape and hardly half as long, sparingly beset with hairs; fingers slender, curved, sharply pointed, about as long as palm; movable finger longer and more strongly curved. Ovigera long (as long as, or longer than, animal), slender. First joint short and comparatively thick ; 7.2 over twice as long and more slender ; these 2 joints extend downward from their attachment to the first trunk segment. The third joint bends backward, running nearly parallel with the trunk; it is half again as long as the first two joints taken together and even more slender than the second; slightly curved, with the con- vexity upward; about one fourth of its length from the proximal end is a constriction which on superficial examination might be taken for an 2p COLE articulation. The fourth joiet is somewhat shorter than the ee Oe ant bas Aawly tack ons ei of the fourth ca ts din a he the fifth and sixth together scarcely Eggs on ovigera in several globular masses. Legs slender, second pair about two and one half times as long as th animal ; ¢.1 short, little longer than broad ; ¢.2 rather over twice the of ¢.1; at about the middle of the dorsal side is a slight rounded ance; in the male the ventral side extends at the distal end into : Gens dino; fx bam chain dienes ta at its end is the opening of the so-called agglutinative from which is supposed to be used in gluing the Second tibial joint slightly longer than 4.1; neither quite s the distal end of £1 is a projection similar to that on f,, but sm i the ventral sangha, the dele, fy eaenidi-oltk ui gaes alt ann | curved spines, varying in number from 7 or § to 11; along the tal p extends a thin, lamellar, knife-like chitinous plate along the sides of wi ; : ag! G E é —— so ee shay pols PYCNOGONIDS 291 been mentioned, there are a few fine hairs, especially on /, 4.1, 42, and ¢s.1, and a more or less regular row of small bristles along the dorsal side of ¢s.2. Integument thin, clear, and with comparatively few cuticular cavities. Color in alcohol light. Length about 2.5 mm.; sexes of nearly the same size. SPECIMENS EXAMINED, Lot. Locality. No. of specimens, Date. Source. 13 | San Diego, Calif. 65, 12 Sept., 1896 Univ. of Calif. (coll. by Prof. Kelsey) 15 | San Diego, Calif. 12 July 8, 1895 Dr. S. J. Holmes Remarks.—This species of Anoplodactylus, which I have called erectus on account of the position of the caudal segment, is in many respects very similar to 4. petiolatus (Kroyer). shown in the following table: A, petiolatus. Trunk ‘‘somewhat short and stout, and, relatively to its length, rather broad.” Lateral processes not much sepa- rated. Caudal segment long, cylindrical, abruptly acuminated, placed horizontally. Proboscis of plain cylindrical form, obtusely truncated. Immovable finger of chela almost quite straight. Ovigera nearly as long as animal. Legs hardly two times length of animal. Second tarsal joint strongly curved ; 4 to 6 spines on proximal part of sole. The important differences are A. erectus. Trunk rather slender. — Lateral processes well separated. Caudal segment not especially long, more or less conical, directed upward at a sharp angle. Proboscis not plain cylindrical, narrower in basal portion. Fingers of chela both curved. Ovigera as long as, or longer than, animal; third joint especially proportionately longer than in A, petiolatus. Legs proportionately longer; two and one half times length of ani- mal. Second tarsal joint not strongly curved; 7 to 11 spines on proxi- mal part of sole. 292 COLE Family PYCVOGONIDZ. Chelifori and palpi both absent; ovigera present in the male only Genus Pycnogonum Briinnich (1764). Trunk stout and square-set. Ovigera small, present only in the male, g- or 10-jointed. Legs comparatively short, stout, tapering. First tarsal joint small; claw powerful; auxiliary claws usually absent. Remarks.—There seems to be a disagreement among authors as to whether in this genus the ovigera are g-jointed or 10-jointed. This is probably due to the fact that some count the terminal claw as a joint, while others do not; but as it differs from the others only in being smaller and more chitinous, I see no reason why it should not be considered a joint the same as the terminal claw of the legs. PYCNOGONUM STEARNSI Ives. Plate xiv, figs. 13-15; plate xxvl, fig. 10. Pycnogonum stearnsi IVES, ’92, p. 142, pl. X, figs 1-4. Trunk broad, somewhat depressed ; lateral processes with scarcely any interval between them. Each trunk segment with a prominent tubercle at its posterior border on the mid-dorsal line (considerably smaller on the last segment), and a somewhat smaller tubercle on the outer edge of each lateral process. First trunk segment about two thirds the length of the proboscis, slightly constricted just ahead of the lateral processes; second and third segments each equal to the portion of the first back of the con- striction; the fourth somewhat shorter. Posterior borders of the segments slightly elevated. Caudal segment clavate, or nearly cuneiform, truncated at its ex- tremity, sometimes slightly swollen in the middle; somewhat longer than the fourth trunk segment, about equal to the third. The anus is a longitudinal slit on the ventral side of the caudal segment near the tip. Eyetubercle bluntly conical, placed just behind the constriction of the first segment ; eyes black or dark brown, distinct, or in some cases indistinct and without pigment; the posterior pair usually farther apart than the anterior. Proboscis subcylindrical, slightly swollen at or a little anterior to the middle; somewhat longer than the first trunk segment. Ovigera (pl. xxv1, fig. 10) small and rather slender; 10-jointed, the last joint a strong, straight, or nearly straight, claw. The joints do not diminish gradually in length; the first, second, fourth, seventh, and eighth are approximately as long as broad, while the others are propor- tionately longer. The diameter does not decrease greatly until the ninth —— Oe ee a PYCNOGONIDS 293 joint, where it begins tapering gradually to the tip of the claw. Practi- cally smooth except for a few very small bristles on the outer side of the third joint. When not carrying eggs, the appendages commonly extend outward and a little backward, then curve forward and in again toward the middle line. The bending occurs particularly at the fourth and at the eighth and ninth joints. Eggs small, carried on the ovigera in one (pl. x1v, fig. 15) or two (fig. 14) large, wrinkled, cake-like masses, occupying the whole space under the animal and extending so far that when looked at from below only the legs from the fourth joint outward are visible, except the posterior pair, which can usually be seen because the eggs are carried well forward. Legs stout: ¢.1 broader than the lateral processes of the segments, with the appearance of a dorsal notch on its outer border due to the close approximation of two dorsal tubercles; ¢.2 rather smaller than ¢.1 ; c.3 rather smaller than ¢c.2; the 3 joints together in the third leg about as long as the proboscis; / strongly developed, about two thirds as long as the coxal region; proximal half of the ventral surface considerably swollen (in male as well as female), a rather weak dorsal tubercle at the distal extremity; 41 about equal to f, but more slender; #2 rather shorter than #1; ¢s.1 very short, subtriangular; 4.2 about as long as 4.2; cd. less than half as long as ¢s.2, rather strongly curved. On the dorsal surface of f, and of 4.1 and #2, near their distal ends, there is a single compara- tively strong spine; ventral side of 42 beset with smaller spines at its distal end, while the tarsal joints, especially the first, have their ventral surfaces thickly beset with these short spines. The 11 females measured range from 4 mm. to 8 mm.; the males average somewhat smaller, the largest being but 6.3 mm. in length. SPECIMENS EXAMINED. Lot. Locality. No. of specimens. Date. Source. 11 | San Pedro Point, San | 2’, 22 Sept. 1, 1895 Univ. of Calif. Mateo Co., Calif. 17 | Pacific Grove, Monte- | 19 July 13, 1896 Univ. of Calif. rey Co., Calif. 19 | Dillon’s Beach, Sono- | 29 Aug. 4, 1898 Univ. of Calif. ma Co., Calif. 21 | Shelter Cove, Hum- | 140', 69 June 24, 1894 Univ. of Calif., boldt Co., Calif.1 No. 19,516 Remarks.—This species was established by Ives from 5 female speci- mens collected at San Diego, and it has not been recorded since that 1 Collected ‘‘on rocks.’’ Ten of the fourteen males in this lot were carrying egg-masses. 294 COLE time until now. Ives’s description and figures are readily recognizable, and besides being able to include the description of the male I have very little to add. Pycnogonum stearnsi is closely allied to P. Uittorale (Strém). The prin- cipal differences can be seen at a glance in the following table: P. littorale. P. stearnsi. Average length of female about 15 Average length of female about 6 mm. mm. Claw more than half the length of Claw less than half the length of the second tarsal joint. the second tarsal joint. A smaller conical protuberance on No protuberance on the first trunk the dorsal side of the first trunk segment between the one on the segment between the one on the posterior border and the eye posterior border of the segment tubercle. and the eye tubercle. Ovigera: “Along the inner margin Ovigera practically unarmed except of the joints extend a few very for a few small spines on the small and irregularly distributed outer side of the third joint. spines of quite a simple form” (Sars, ’91, p. 10). BIBLIOGRAPHY. The following list includes, besides the papers referred to in the fore- going pages, the principal references to North American Pycnogonida. Boum, R. 1879 Uber die Pycnogoniden des K6nigl. Zoologischen Museums zu Berlin, inbesondere iiber die von S. M. S. Gazelle mitge- brachten Arten. Monatsbericht der Kénigl. Akademie der Wissenschaften zu Berlin, 20, Taf. 1, 1, Februar 1879, pp. 170-195. 1879® Ueber Pycnogoniden. Sitzungsber. Gesellsch. naturforsch. Freunde Berlin, pp. 140-142. BRUNNICH, MARTIN THRANE. 1764 Entomologia (Copenhagen). Cotz, LrEon J. 19012 Notes on the Habits of Pycnogonids. Biol. Bull., vol. 11, pp. 195-207. 1901 On Discoarachne brevipes Hoek, a Pycnogonid from South Africa. Zool. Jahrb., Abth. f. Syst.. Bd. 15, pp. 243-248, Taf. 13. PYCNOGONIDS 295 Dat, W. H. 1876 On the Marine Faunal Regions of the North Pacific; an Intro- ductory Note to the Report on Alaskan Hydroids, by Mr. Clark. Proc. Acad. Nat. Sci. Phila., 1876, pp. 205-208. Dana, JAMEs D. 1853. U. S. Exploring Expedition during the years 1838, 1839, 1840, 1841, 1842. Under the command of Charles Wilkes, U.S. N. vol. xiv, Crustacea, pt. 1, Arachnopoda or Pycnogonida, pp. 1382-1391. DouRN, ANTON. 1881 Die Pantopoden des Golfes von Neapel und der angrenzenden Meeres-Abschnitte. Fauna und Flora des Golfes von Neapel, 1 (Leipzig). Goopsir, H. D. S$. 1842 On some new species of Pycnogonide. Edinb. New Phil. Jour., vol. XXXII, p. 136. 1844 On the Specific and Generic Characters of the Araneiform Crustacea. Ann, and Mag, Nat. Hist. (1), vol. 14, pp. 1-4, pl. 1. Gou.Lp, Aucustus A. 1844 Description of a new species of Crustacean. Proc. Bost. Soc. Nat. Hist., vol. 1, pp. 92, 93. Hansen, H. J. 1884 Fortegnelse over de hidtil ide Hanske Have fundne Pycnogo- nider eller Séspindler. Naturhist. Tidsskrift, 3. Rekke, Bd. XIV, pp. 647-652. 1885 Sdspindler (Pantopoda v. Pycnogonidz). Zoologia Danica. Afbildninger af Danske Dyr med populer Text, pp. 117-131, Tab. vu, figs. 8-23 (Copenhagen). HASWELL, W. A. 1885 On the Pycnogonida of the Australian Coast, with Descriptions of New Species. Proc. Linn. Soc. N. S. W., vol. 1x, pp. 1021-1034, pls, LIV—LVII. Honcg, G. 1864 List of the British Pycnogonide, with Descriptions of several New Species. Ann. and Mag. Nat. Hist. (3), vol. xii. Forex, P. P. C. 1877 Ueber Pycnogoniden. Niederl. Arch. f. Zool., 111, pp. 235-254, Taf. xv, XVI. 18812 Report on the Pycnogonida dredged by H. M. S. Challenger during the years 1873-76. The Zoology of the Voyage of H. M. 8. Challenger, vol. ul, Pt. X. 1881> Nouvelles études sur les Pycnogonides. Arch. de Zool. expér. et génér., T. Ix, pp. 437-542, pls. XXIII-xxx. 296 COLE 1898 On four Pycnogonids, dredged during the Cruise of the Chal. lenger (investigated and described after the completion of the Report). With an appendix. Tijdschr. d. Neder. Dierk. Vereen. (2), 6. Deel, pp. 290-301, pls. 11, 111. Ives, J. E. 1892 A new species of Pycnogonum from California. Proc. Acad. Nat. Sci. Phila., 1892, pp. 142-144, pl. x. JOHNSTON, GEORGE. ; 1837 Miscellanea zoologica. An attempt to ascertain the British Pycnogonidz. Mag. of Zool. and Botany, vol. 1, p. 368. Krover, H. 1845 Bidrag til Kundskab om Pycnogoniderne eller Sdspindlerne. Nathist. Tidsskrift., 2. Rekke, Bd. 1, pp. go—139. 1849 Gaimard’s Voyage en Scandinavie, Atlas, pls. 35-39. Leacu, W. E. 1814 Zoological Miscellany; being Descriptions of new or interesting Animals, by William Elford Leach. Illustrated with coloured figures, drawn from Nature, by R. P. Nodder. 3 vols. London, 1814-17. [Pycnogonids in vol. 1, 1814.] LENDENFELD, R. VON. 1883 Die Laryenentwicklung von Phoxichilidium plumulariz nov. sp. Zeitschr. f. Wiss. Zool., Bd. xxxvIIl, pp. 323-329. MEINERT, FR. 1899 Pycnogonida. The Danish Ingolf-Expedition, vol. 111, Pt. 1, pp. 1-71, Tab, 1-v (Copenhagen). Miers, EDWARD J. 1879 Crustacea of Kerguelen Island. Philos. Trans. Lond., vol. CLXVIII, pp. 200-214, pl. x. (Pycnogonids, pp. 211-214.) MILNE Epwarps, A. 1840 Histoire Naturelle des Crustacés. Tome III, pp. 530-537, pl. 41, figs. 6 and 7 (Paris). Moésius, KARL. 1901 Arktische und subarktische Pantopoden. Fauna Arctica. Eine Zusammenstellung der arktischen Tierformen, mit besonderer Beriicksichtigung des Spitzbergen-Gebietes auf Grund der Ergebnisse der Deutschen Expedition in das Nérdliche Eismeer im Jahre 1898. Bd. 11, Lieferung 1, pp. 35-64 (Jena). 1902 Die Pantopoden der deutschen Tiefsee-Expedition 1898-1899. Wissenschaftliche Ergebnisse der deutschen Tiefsee-Expedi- tion auf dem Dampfer Vaidivia 1898-1899, 3. Bd., 6. Liefer- ung, pp. 175-196 (1-22), Taf. xxIv—xxx (I-—vI!). Moreau, T. H. 18912 A Contribution to the Embryology and Phylogeny of the PYCNOGONIDS 297 Pycnogonids. Stud. Biol. Lab. Johns Hopkins Univ., vol. Vv, NO. 1, pp. 1-76, pls. I—VIII. 1891» The Relationships of the Sea-Spiders. Biol. Lect. Marine Biol. Lab. for 1890, pp. 142-167 (Boston). NutTTIino, C. C. 190I Papers from the Harriman Alaska Expedition, xx1—The Hy- droids. Proc. Wash. Acad. Sci., vol. 111, pp. 157-216, pls. XIV—XXVI. OrRTMANN, A. E. 1891 Bericht iiber die von Herrn Dr. Déderlein in Japan gesam- melten Pycnogoniden. Zool. Jahrb., Abth. f. Syst., Bd. v, pp. 157-168, pl. xxiv. 190r Crustacea and Pycnogonida Collected during the Princeton Expedition to North Greenland. Proc. Acad. Nat. Sci. Phila., rg01, pp. 144~-168. RaTHKE, H. 1799 Naturh. Selsk. Skrifter, vol. v. Sars, G. O. 1888 Pycnogonidea borealia & arctica (Prodromus descriptionis), Arch. f. Mathem. & Naturvid., Bd. xu, pp. 339-356. 1891 Pycnogonidea. The Norwegian North-Atlantic Expedition, 1876-1878. Zoology, vol. v1, pp. 1-163, pls. I-xv. Say, THOMAS. 1821 An account of the Arachnida of the United States. Jour. Acad. Nat. Sci. Phila., 1821, vol. 11, pp. 59-82. SCHIMKEWITSCH, W. 1889 Sur les Pantopodes recueillis par M. le lieutenant G. Chierchia pendant le voyage de la corvette Vettor Pisani en 1882- 188s. Attidella R. Accad. dei Lincei, Mém.(4), v1, pp. 329- 347 (1 plate). 1893 Compte-Rendu sur les Pantopodes. Reports on the dredging operations ...... carried on by the U. S. Fish Commission steamer Albatross during 1891, etc., vill. Bull. Mus. Comp. Zool., vol. XXv, pp. 27-43, pls. 1, I. 1895 Sur les Pantopodes de l’océan glacial et de la mer blanche. C. R. Soc. Natural. St. Pétersb., Nos. 3, 4, pp. 33-49, 52-56. STIMPSON, WILLIAM. 1854 Synopsis of the Marine Invertebrata of Grand Manan or the Region about the Mouth of the Bay of Fundy, New Bruns- wick. Smiths. Contr. to Knowl., vol. vi, pp. 37, 38. 1864 Descriptions of new species of Marine Invertebrata from Puget Sound, collected by the Naturalists of the North-west Boun- dary Commission, A. H. Campbell, Esq., Commissioner. Proc. Acad. Nat. Sci. Phila., 1864, pp. 153-161. 298 COLE Tuomson, Geo. M. 1884 On the New Zealand Pycnogonida, with Descriptions of new Species. Trans. N. Zealand Inst., Wellington, vol. xv1, pp. 242-248, pls. XIV—XvI. VERRILL, A. E. 1900 Additions to the Crustacea and Pycnogonida of the Bermudas. Trans. Conn. Acad. Arts and Sci., vol. x, Pt. 2, pp. 573- 582, pl. Lxx, figs. 9, ro. Wisoy, E. B. 1878 Descriptions of two new genera of Pycnogonida. Am. Jour. Sci. (3), vol. 15, pp. 200-203. 1878 A Synopsis of the Pycnogonida of New England. Trans. Conn. Acad. Arts and Sci., vol. v, pp. 1-26, pls. I-v1. 1880 The Pycnogonida of New England and Adjacent Waters. Rept. U. S. Fish Com. for 1878, Pt. v1, pp. 461-506, pls. I-VI. 1881 Report on the Pycnogonida. Reports on the results of dredg- ing, under the supervision of Alexander Agassiz, along the east coast of the United States, during the summer of 1880, by the U.S. Coast Survey steamer Blake, Commander J. R. Bartlett, U. S. N., commanding. x1. Bull. Mus. Comp. Zool., vol. VIII, pp. 239-256, pls. I-v. \ ‘ ‘ J . - z tie . | - | > / | ; oe, Y : ; se» a ‘ “: Ps : a sy 4 ; oT 33 a : - ore 3 . * . : a ty “+ * . : A be | ‘ 7 : ‘ a 4 - ~ ; ’ | : ae) | ‘ ‘ i * 4 : | , der ’ j . ) * om , : ‘ : ‘ “i. 4, » F ‘ wine ‘ . : , = - : i ‘ ~ 4 te gene. g . c #! Aa 3 ot y c an ey J Te 7, oa J s “~. ’ * . 7 : F od + A | a FigA© es VOX PYCNOGONIDA HELIOTYPE CO.. BOSTON. rs < 7 my » at ~ hace & - “ ) Ps i = ~ i a af 7 : ¥ = “ - “ : a 4 , . = eons . , ob : ; ; z A . Pus i = : = “A ' = = : : \ ® ry < - < a * s : t = = . rt a . i 3 : - bg = as * - a al J as 1 = i 1 a - a . % cy + ~ 7 . « \ ia * } a ok . * - - — ™ \ 1 f 5 = iL ‘3 * os ! t t i * i . : " ca? ‘ Bk i ri . . - - a _ - i = - cia T 53 ei 1 = tr i oy A : ii ; t y - * ‘ , : =| ~ > . ae - . - % ip ° eee: . ie v4 re 7 a ils A BV.OluuA PYCNOGONIDA HELIOTYPE CO., BOSTON. PLATE XII PLATE XIII PYCNOGONIDA HELIOTYPE CO.. BOSTON. as a cei le xy 29 a a = ae > ee nA * * = . , ., is = : aa e 2 ai = 7 i j > os \ ' : : = » ee : 1 ~~ = Pa 3 ' ns © 7 ' i is zs {= . is —_— = * ‘ ed £ sd 4 ui if a : z x cg! - - . ‘J - ner 3 ; : ui wv Ah F J Ad, ’ P - rs i. ; é + i a f - i, ; Es i . Me ; i 5 i ‘ a 4 ih a Nu A 2 : : ' H. A E. VOL. X pas m PYCNOGONIDA HELIOTYPE CO.. BOSTON. ie a sf p oe . 4s ‘ j 5 i - . - Pe ee oe pe as chi Maes nov. Fic. 1. Female from left side (Lot 18). x 20, : 2. Caudal segment seen from left lai X 53. 3 Third right leg of male (Lot 20). ‘ 4. Foot of same. X 43. Be 5 Bye, hr nd ight pup of male (Lt 20); em om hes x 5 6. Praca ight lp en eam toe x 25. Ts 8. Right ovigne of feinle et aphasia a H. A. E. VOL. X . PLATE XV PYCNOGONIDA HELIOTYPE CO., BOSTON. ‘ d *% “a < s ‘ d ¥ \ i. - ry ; 2. . A Bea eas os 4 a a pal} 26 Bs 4 - “a Sm - + rs ; _ fe : * * , 4 a ie j 4 * ; st fis f ; i — vy . y wr S 7 r ‘ wo Fic. 1 Maks Ero she We ri). xX = al et cl a a ep male (a) | from dorsal side. X 20, 3. Second right leg of male (Lot rb). 4: Second ona oat of thir eh log tea is); X 20. 5. Palp of female (Lot ta). X33 6. Oviger of female (Lot ta). X 33+ 7. Oviger of male (Lot 1c). X 33. 8. Cheliforus of female (Lot 1a). g- Denticulate spine from oviger of male (Lot 4b). 247. > H. A. E. VOL, X PLATE XVI PYCNOGONIDA HELIOTYPE CO., BOSTON. Ammothea a alashensis sp. Nov. 4. Female from left side (Lot 25). X 27. s. Cheliforus of adult (Lot 7b). X73. 6. Caudal segment, dorsal view (Lot 7b). _ X43. 7. Left oviger of female (Lot 7a). X 73. 8. Right palp of female (Lot 7b). X 73+ g. Third left leg of female (Lot 25a). XX 27. 10. Foot of second left leg, female (Lot 7a) X 53+ 11. Second coxal joint of third left leg of male (Lot 25). X 27. 12. Right oviger of male (Lot 25b). X 37. Hak. EovVOte A PLATE XVII if PYCNOGONIDA HELIOTYPE CO., BOSTON. a 3 Right oviger of teams t 9a). Ee 43 4. Left oviger of male (Lot 9b). me) a 5. Second right leg of male (Lot 9b). 6. Ltr oe econ inthe gh eg of mae La x 33. Ammothea 7. Male from right side (Lot 2). x 11. 8. Bait chelate oa at Se ‘X 20, x H. A. &. VOL, X PLATE XVIII i —— 3 ~~ * PYCNOGONIDA HELIOTYPE CO., BOSTON. PLATE XIX. Ammothea pribilofensis sp. nov. Fic, 1. Left palp (Lot 2a). x 20. - Lateral process and first coxal joint of first left leg of male (Lot 2); dorsal view. Left cheliforus of immature specimen (Lot 2-1); dorsal view. 20. First right leg of male (Lot 2a). x 10. Heel of same. X 20. Second coxal joint of third right leg of male"(Lot 2a). 10. Left oviger of male (Lot 2a), x 20. 8. Oviger of female (Lot 2b). x 20. WAKA Y H. A. E. VOL. X PLATE XIX PYCNOGONIDA > HELIOTYPE CO., BOSTON. i Fic. 1. 3 4 5. 6. PLATE XX. Ammothella tuberculata sp. nov. Female from left side (Lot 27). x 20. Female specimen from dorsal side (Lot 22). x 20. Right cheliforus of female (Lot 27). X 37. Right palp and right oviger of female (Lot 27). X 37. Second left leg of female (Lot 27). X 33. Right cheliforus of female (Lot 22a). xX 43. Ammothella spinifera sp. nov. Female from right side; chelifori, palpi, and proboscis not shown ; setae of side cut away, exposing alimentary canal and nerve ganglia (Lot 14). X 43. Eye tubercle of immature specimen seen in posterior view (Lot 14). X 70. Proboscis (Lot 14), X 33 (318) HAE: VOL. Xx PLATE XX ‘ Wand ie ay, \\ ve \y va WAN TN Kc ANIKI \\ eA \ \\\\ \\ \\\ << PYCNOGONIDA HELIOTYPE CO., BOSTON. ‘ - * ; 4 a: wal } se + ‘~. * “ea Sa ss oor an - Ke) PLATE XXI. Ammothella spinifera sp. nov. Female from above (Lot 14). X 27. Left oviger of female (Lot 14a). X 70. Left cheliforus of female (Lot 14a). X 70. Left cheliforus of immature specimen from above (Lot 14). X 70. First left leg of female (Lot 14a). X 43. Left palp (Lot 14) X 70. cae Tanystylum intermedium sp. nov. Male from right side (Lot 29). x 40. Right cheliforus of male (Lot 29b); from above. X 107. Right cheliforus of immature specimen (Lot 29) X 107. (320) ae H. A. E&. VOL. X PLATE XxI PYCNOGONIDA HELIOTYPE CO., BOSTON. . > . ‘ - ° ; : - a 7 P : . ‘. J ' PLATE XXII. Zanystylum intermedium sp. nov. Fic. 1. Male from above (Lot 29) X 44. 2. Female from above (Lot 29). X 44. ’ 3. Immature specimen from above (Lot 29). X 44. is 4. Left palp of female (Lot 29a). X 70. 5. Second right leg of male (Lot 29b). X 43. 6. Foot (Lot 29b). x 80. 7. Femoral joint of second left leg of female (Lot 29a). X 43. (322) H. A. E. VOL. X : PLATE Xxil \\ “hy +, el te ies " ‘ AW A \\y m\\ \ \ XY AN WM Ly Neel 7) LAI \ 0, \\es ; \\ 1 J ‘4 “ . NM i PYCNOGONIDA HELIOTYPE CO., BOSTON. Fic. PLATE XXIII. Zanystylum intermedium sp. nov. Left oviger of male (Lot 29a). x 70. Left oviger of female (Lot 29a). X 70. Spine from joint 9 of above (Fig. 2) highly magnified, Clotenia occidentalis sp. nov. Male from right side (Lot 16). X 34. Cheliforus and palp of same. X 70. Third right leg of same. X 33- Left oviger of same. XX 70. Same specimen from above. X 33. (324) PLATE XxXiil xX H. A. E. VOL, i *) YU, “yj fy YY PYCNOGONIDA 2 g 3 z be a = a ae : Fic. PLATE XXIV. Phoxichilidium femoratum (Rathke).— 1. Female from side (Lot 3). X 10. 2. Second left leg of female (Lot 3). 13 3. Eye tubercle, anterior view (Lot 3). X 43- 4. Caudal segment, posterior view (Lot 3). X 43. s. Right oviger of male (Lot 8). xX 20. Halosoma viridintestinalis gen. Nov., Sp. NOV. . From left side (Lot 28). X 43: . Left chela of same. % 107. 8. Same as Fig. 7, cleared and mounted. X 107. aa oO 326) _ roa H. A. E. VOL. X PLATE XXiV PYCNOGONIDA HELIOTYPE CO., BOSTON. Brie: t4 = a ie a ¥ * ¢ a - * ad . Cie r fy, . « “ 7 ; S } i 2 ¥ ! x Norse 3 J . ® z - te Dy! £ : : a . “ ‘ ; . I ? " A . rir A SS 5 : nee ; “> me. A Fox tk een = “wd ae] PLATE XXVI. A ylus erectus sp. nov. Fic. 1. Male from side (Lot 1 ). Sao. Uy) a. Hye tubercte of feaial Clipe Wii Gaalmaide view. X 43 _ 3. Third right leg of male (Lot 13b). X 20. 4. Terminal part of left oviger of same specimen. X 53. g. Foot of Fig. 3. X53. 6, Second coxal joint of fourth right leg of male (Lot 13). x 43. 7. Second coxal joint of second right leg of female (Lot 13c). X 43. 8. Caudal segment of female (Lot 13); anterior view. X 43. 9. Left chela (Lot 13c). x 67. 10. Left oviger of male (Lot 21-1). X 27. PLATE XXVI bh Aw EE. VOC IX = cre Gee |e har x - NS S737 NN ‘ we, PYCNOGONIDA HELIOTYPE CO., BOSTON. INDEX (New genera and species, and the pages on which they are described, are in black-face type; synonyms in parenthesis.) Acanthephyra curtirostris 8, 27 Acantholithodes hispidus 13, 163 Achelia 254, (262) figa alaskensis (214) belliceps (214) harfordi (213) Alcinous 263 Allorchestes ochotensis 233-234, fig. 118 Alphzeus spinus (63) Alpheopsis trispinosus 108 Alpheus aculeatus (61) barbara 10, 108 bellimanus 10, 108 californiensis 10, 108 clamator (108) dentipes 10, 108 equidactylus 10, 108 macrocheles 108 polaris (73) Ammothea 254, 262-263, (273) alaskensis 251, 252, 258, 265, 266- 268; PL. XII, fig. 4; PL. XV, figs. 4-12 appendiculata 273 bi-unguiculata 273 borealis 263 gracilipes 251,258, 269-270; PL. XII, fig. 5; PL. XVIII, figs. 1-6 latifrons 251, 252, 258, 263-266; PL. XI, fig. 3; PL. XVI, figs. I-9; PL. XVII, figs. 1-3 longicaudata 250, 251, 263 pribilofensis 251, 258, 270-273; PL. XII, fig. 6; PL. XVIII, figs. 7, 8; PL. XIX, figs. 1-8 rugulosa 273 uni-unguiculata 273 Ammothella 273 Ammothella spinifera 251, 258, 275-277 ; PL. XII, fig. 8; PL. XX, figs. 7-9; PL. XXI, figs. 1-6 tuberculata 251, 258, 273-275; PL. XU, fig. 7; PL: Xx, figs. 1-6 Amphipods 231-246, figs. 118-128 Amphithoe humeralis 241 Amphithopsis glaber (238) Anasimus rostratus 15, 171; PL. xX, fig. 4 Anchista tenuipes (34) Anoplodactylus 288 aculeatus 288 erectus 251, 259, 289-291 ; PL. XIV, fig. 12; PL. XXVI, figs. 1-9 gestiens 288 petiolatus 291 plumulariz 288 spinosus 288 tubiferus 288 Argis lar (137) Asellus entomon (216) tomalensis 213, 224-226, figs. 110-112 Astacus groenlandicus (61) Axius spinulicauda 12, 149-150, fig. 90 Benthesicymus tanneri 12, 147 Betzus harfordi 11, 108 harrimani 11, 108-110, fig. 49 longidactylus 11, 108 Bibliography, Isopods 228-230 Pycnogonids 294-298 Blepharipoda occidentalis 14, 167 Brachynotus nudus (189) oregonensis (189) Calastaceus investigatoris 12, 150, 15! key to species 150 Callianassa affinis 12, 154 (331) 332 INDEX Callianassa californiensis 12, 153, 154 gigas 12, 154 goniophthalma 12, 154-156, PL. VIII key to species 153-154 longimana 12, 154 Callinectes bellicosus 16, 180 Cancer aculeatus (61) amphicetus 6, 16, 175; PL. VI, fig. 3 antennarius 16, 176, 177 anthonyi 16, 176,177; PL. VI, fig. 2 boreas (133) cheiragonus (179) gibbosulus 16, 176, 177, 178 gracilis 16, 177 jordani 16, 176-177; PL. VI, fig. 4 magister 16, 177 oregonensis 16, 178; PL. VII, fig. 1 productus 16, 175 spinus (63) Caprella alaskensis 241-243, fig. 125 ciliata 241 irregularis 241 kennerlyi 241 kincaidi 245-246, fig. 127 scabra 243-245, fig. 126 Carinogammarus subcarinatus 239 Celastaceus quinqueseriatus 12, 150, 151- 153, fig. 91 Cheiragonus isenbeckii (179) Chioncecetes opilio 15, 174 tanneri 15, 174 Chiridotea entomon 216 Chorilia longipes 15, 174 Cirolana californica (213) harfordi 213 Clotenia 277, 280 conirostris 253 occidentalis 251, 253, 259, 281-282; PL. XIII, fig. 9; PL. XXIII, figs. 4-8 Clythrocerus planus 15, 168-170; PL. 1X, figs. 4, 5 Cole, Leon J., Pycnogonids 247-298, PLS, XI-XXVI Corniger (259) Corystes gibbosula (176) Crangon abyssorum II, 112, 125-127, fig. 66 acclivis 11, 112, 129, fig. 68 alaskensis II, 112, 114-115, figs. 52, 53 alba 11, 112, 117-118, figs. 56, 57 Crangon angustimana £1, III, 121-122, figs. 62, 63 boreas (133) communis II, 112, 123-124, fig. 64 crangon (116), 117 dalli 11, 111, 119-120, fig. 60 elongata 11, 112, 115-116, fig. 54 franciscorum I1, III, 120-121, fig. 61 holmesi 11, 112, 118, fig. 58 intermedia 11, 112, 122-123 key to species 111-112 lar (137) munita II, 112, 127-128, fig. 67 munitella 11, 112, 132 nigricauda I1, 112-114, fig. 50 nigromaculata 11, 33, III, 114, fig. 51 resina II, 112, 124-125, fig. 65 septemspinosa II, III, 116-117, fig. 55 sharpi (135) spinirostris 11, 112, 131-132, fig. 71 spinosissima I1, 112, 130-131, fig. 70 stylirostris 11, 112, 118-119, fig. 59 tenuifrons (122) variabilis 11, 112, 129-130, fig. 69 vulgaris (116), 117 Cryptolithodes brevifrons 14, 164 sitchensis 14, 164 typicus 14, 164 Cryptophrys concharum 17, 188; PL. VII, fig. 6; fig. 94 Cyclodorippe plana (168) Cycloxanthops novemdentatus 16, 180; PL. VII, fig. 10 rugosus 16, 180 Cymothoa entomon (216) Daira americana 180 Dasygyius tuberculatus 15, 172; PL. xX, figs. 3, 3a; fig. 92 Decapods I-190; PLS. I-X, figs. 1-95 discussion of species 19-190 features 4-6 geographic distribution 6-17 Dermaturus mandtii 13, 163 Discoarachne brevipes 277 Dynamene tuberculosa 214 Elasmonotus asper (167) Emerita analoga 14, 168 emerita 168 Endeis 263 ; " INDEX Entomon pyramidale (216) Epialtus bermudensis (173) bituberculatus 15, 173 nuttallii, 15, 173 productus 15, 173 Erichthonius difformis 241 Erileptus spinosus 15,171; PL. X, fig. 1 Erimacrus isenbeckii 16, 179 Eupagurus beringanus (159) cornutus (158) gilli (161) setosus (159) townsendi (158) undosus (159) Fabia 185 subquadrata (186), (187) Galathea californiensis 14, 166 Gammaropsis tenuicornis 239-240, fig. 124 Gammarus confervicolus 239 locusta 238 pugettensis 239 pulex 238 Gelasimus gracilis (190) macrodactylus (190) Gennadas borealis 12, 147-148, figs. 88, 89 sp.—I2 Glyptonotus entomon (216) Grapsodius eximius 17, 189 Halosoma 286 viridintestinalis 251, 259, 286-288; ~ PL. XIV, fig. 11; PL. XXIV, figs. 6- 8; PL. XXxV, figs. 1-4 Hapalogaster brandtii (163) cavicauda 13, 162 dentata 13, 162 grebnitzkii 13, 163 inermis (163) mertensii 13, 162-163 Harriman, E. H., species named for 108 Hemigrapsus nudus 17, 189 oregonensis 17, 189 Heptacarpus 56 brevirostris (99) carinatus (84) cristatus (102) gracilis (77) 308 Heptacarpus palpator (98) paludicola (101) pictus (101) taylori (101) tenuissimus (77) Herbstia camptacantha (175) parvifrons (175) Hetairus debilis (73) gaimardii (73) tenuis (73) Heteractzea lunata 16, 185 Heterocrypta occidentalis 15, 170 Hippa analoga (168) Hippolysmata californica 9, 56 Hippolyte aculeata (61) affinis (77) amabilis (79) amazo (73) armata (61) belcheri (86) borealis (73) brevirostris (99) californiensis 9, 56 camtschatica (94) cornuta (61) cristata (102) cultellata (73) esquimaltiana (84) fabricii (85) gaimardii (86) gibba (86) gracilis (77) groenlandica (61) lamellicornis (62) layi (86), (96) liljeborgii (68) macilenta (105) ochotensis (71) palpator (98) phippsii (70) picta (101) polaris (73) prionota (61) pusiola (99) st. pauli (73) securifrons (68) sitchensis (102) sowerbeei (63) spinus (63), (66) stylus (84) suckleyi (89) 334 Hippolyte taylori (101) turgida (70) vibrans (70) Holmes, S. J., Amphipods 231-246, figs. 118-128 Holopagurus pilosus 13, 162 Hyas coarctatus 15, 174 lyratus 15, 174 Hymenodora frontalis 7, 8, 27, 28-29, fig. 8 glacialis 7, 8, 27 key to species 27 Idotzeya longicauda (216) Idotea entomon (216) gracillima 213, 216-218, figs. 97, 98 hirtipes (218) ochotensis 219 oregonensis (218) resecata 216 stenops 219 wosnesenskii 218 Inachoides magdalenensis 15, 171 Isopods 211-230, figs. 96-117 bibliography 228-230 Janira occidentalis 224 Janiropsis californica 223-224, figs. 108, 109 kincaidi 221-222, figs. 102-107 Lecythorhynchus 259 marginatus 251, 258,260-262; PL. XI, figs. 1-2; PL. xV, figs. 1-8 Leiolambrus punctatissimus 170 Lepeopus forcipatus (163) Lepidopa myops 14, 167 Leptolithodes multispina 14, 165 Ligia dilatala (226) occidentalis 226 pallasii 226 septentrionalis (226) stimpsoni (226) Lithodes zequispina 14, 166 brevipes 14, 165 californiensis 14, 165 camptschensis (165) camtschaticus 14, (165), 165-166 couesi 14, 166 rathbuni 14, 165 spinosissimus (165) INDEX Livoneca vulgaris 214 Lomis dentata (162) Lopholithodes foraminatus 14, 164 mandtii 14, 164 Lophopanopeus bellus 16, 180-181 diegensis 16, 184; PL. IX, fig. 3 frontalis 16, 181; PL. vu, fig. 8 heathii 16, 182; PL. vu, fig. 9 leucomanus 16, 182-183 lockingtoni 16, 183-184; PL. VII, fig. 7 Lophoxanthus bellus (180), (182), (183) leucomanus (182), (183) Loxorhynchus crispatus 15, 175 grandis 15, 175 Maera dubia 239 Maja camtschatica (165) Mimulus foliatus 15, 173 Munida quadrispina 14, 166 Munidopsis aspera 14, 167 beringana 14, 167 hystrix 14, 166 quadrata 14, 167 verrilli 14, 167 Munna sp.—226 Nectocrangon alaskensis 11, 136, 141-142, figs. 82, 83 californiensis 11, 136, 140-141, figs. 80, 81 crassa II, 136, 142-143, figs. 84, 85 dentata 11, 136, 138-139, figs. 76, 77 key to species 136 lar 11, 136, 137-138, (138), 139, (139), figs. 74, 75 levior 12, 136, 143, fig. 86 ovifer 11, 136, 139-140, figs. 78-79 Nika edulis 4 Nymphon femoratum (283) Ocypode gaudichaudii 17, 190 Odius carinatus 238, fig. 123 CEdignathus brandtii (163) gilli (163) inermis 13, 163 Oniscus entomon (216) Opisthopus transversus 17, 188; PL. IX, fig. 2; fig. 95 Oregonia bifurca 15, 171; PL. VI, fig. 5 gracilis 15, 171 Orithyia (282) coccinea (283) INDEX B30 Pachycheles pubescens 15, 168 rudis 15, 168; PL. VI, fig. 6 Pachygrapsus crassipes 17, 189 transversus 17, 189 Paguristes bakeri 13, 161 parvus 13, 161 turgidus 13, 161 Pagurus alaskensis 12, 157 aleuticus 12, 157 beringanus 13,159; PL. V, fig. 5 brandti 12, 157; PL. IV, fig. 4 californiensis 13, 161 capillatus 12, 157; PL. Iv, fig. 3 confragosus 13, 158; PL. IV, fig. 8 cornutus 13, 158; PL. V, fig. 3 dalli 12, 158; PL. Iv, fig. 1 gilli 13, 161; PL. V, fig. 10 granosimanus 13, 160; PL. V, fig. 8 hemphillii 13, 160; PL. v, fig. 9 hirsutiusculus 13, 159-160 kennerlyi 13, 159; PL. V, fig. 4 middendorffii 13, 160 minimus 13, 160 munitus 13, 161; PL. V, fig. 2 newcombei (159) ochotensis 12, 157 rathbuni 13, 158; PL. IV, fig. 2 samuelis 13, 160; PL. V, fig. 7 setosus 13, 159; PL. V, fig. I splendescens 13, 161 tanneri 13, 158; PL. IV, fig. 7 tenuimanus 13, 160-161 townsendi 13, 158; PL. IV, fig. 5 trigonocheirus 12, 157 undosus 13,159; PL. IV, fig. 6 Palzmon ritteri 8, 29-30 Paleemonetes kadiakensis 8, 30-31, fig. 9 Pandalopsis aleutica 9, 51, 52-53; PL. I, fig. 1; fig. 16 ampla 9, 51-52 dispar 9, 51, 54-56; PL. I, fig. 2 key to species 51 longirostris 9, 51, 53-54, fig. 17 Pandalus annulicornis (41) borealis 5, 8, 35-37 danz 8, 35, 47-49, fig. 13 dapifer (38), 39 franciscorum (47) goniurus 8, 35, 38-39; PL. 1, fig. 3 gurneyi 8, 35, 50-51; PL. Il, fig. 6; fig. 15 Pandalus hypsinotus 8, 35, 46-47; PL. 11, fig. 5 jordani 8, 35, 40-41; PL. 11, fig. 3 key to species 35 leptocerus 8, 35, 43-44 montagui 5, (41), 43 platyceros 8, 35, 44-45 pubescentulus (44) stenolepis 8, 35, 49-50; PL. Ul, fig. 4; fig. 14 tridens 8, 35, 41-43; PL. U1, fig. 2 Panulirus interruptus 12, 148 Paracrangon echinata 12, (135), 143-145 Parapagurus mertensii 13, 162; PL. V, fig. 6 sp. —13, 162 Parapasiphz serrata 8, 25-26, fig. 7 Parapinnixa affinis 17, 188 Parathemisto oblivia 233 Paribzea 263 Pasipheea acutifrons 22 affinis 8, 19, 24-25, fig. 6 corteziana 8, 19, 24, fig. 5 emarginata 8, 19, 22-23, fig. 4 faxoni 22 glacialis (27) key to species 19 magna 8, 19-20, fig. 1 pacifica 8, 19, 20-22, figs. 2, 3 princeps 8, 19, 23-24 Pasithoé 263 Pelia pacifica 15, 174 tumida 15, 174 Penzus brevirostris 12, 146-147 californiensis (146) Pephredo 263 Perichimenes borradailei 34 tenuipes 8, 34-35, fig. 12 Petrolisthes cinctipes 15, 168 eriomerus 15, 168 Phanodemus 263 Philyra pisum 6, 15, 170 Phoxichilidium 282-283, (288) coccineum (283) femoratum 251, 252, 259, 283-286; PL. XIII, fig. 10; PL. XXIV, figs. I-5 gestiens (288) globosum (283) maxillare 283, (284), 286 minor 283, (284) plumulariz (288) robustum 283 336 Phoxichilidium tubiferum (288) Phyllolithodes bicornis 13, 164 papillosus 13, 164 Pilumnus lunatus (185) spinohirsutus 16, 185; PL. VII, fig. 2 Pinnixa californiensis 17, 187; PL. VII, fig. 3 faba 17, 188 littoralis 17, 187, 188 longipes 17, 188 occidentalis 17, 187; PL. VII, fig. 4; PL. IX, figs. 6, 6a tubicola 17, 187 Pinnotheres nudus 16, 185 pugettensis 17, 185 Placetron wosnessenskii 13, 163-164; PL. vi, fig. 1 Planes minutus 17, 189-190 Platycarcinus recurvidens (178) Platychelus 263 Platycorystes isenbeckii (179) Platymera gaudichaudii 15, 170 Pleuroncodes planipes 14, 166 Podochela hemphillii 15, 171; PL. x, fig. 2 Pontonia californiensis 8, 33-34, fig. 11 margarita 34 Portunus xantusii 15, 179 Pristopus verrilli 14, 165 Processa Canaliculata 4, I1, 110-111 Pugettia dalli 15, 173; PL. I, figs. 1, Ia gracilis 15, 173 richii 15, 173 Pycnogonids 247-298, PLS. XI-XXVI bibliography 294-298 classification and terminology 253-257 discussion of species 259-294 geographical distribution 250-253 key to species 258-259 terminology 256-257 Pycnogonum 292 littorale 294 stearnsi 250, 251, 259, 202-294; PL. XIV, figs. 13-15; PL. XXVI, fig. 10 Randallia bulligera 15, 170 ornata 15, 170 Raphonotus 185 lowei 17, 186-187, fig. 93 subquadratus 17, 186 Rathbun, Mary J., Decapods I-190; PLS. I-X;. figs. 1-95 INDEX Rhinolithodes wosnessenskii 14, 164-165 Rhodia parvifrons 15, 175 Richardson, Harriet, Isopods 211-230, figs. 96-117 Rocinela alaskensis (214) belliceps 214 Saduria entomon (216) Sclerocrangon alata 11, 133, 134-135}; PL. Ill, fig. 2; figs. 72, 73 boreas II, 133-134 key to species 132-133 sharpi II, 132, 135-136; PL. Ill, figs. I, Ia Scleroplax granulata 17, 188; PL. VII, fig. 5 Scyra acutifrons 15, 175 Sergestes atlanticus 12, 145-146 frisii (145) key to species 145 pacificus (145) Sp.—I2, 145, 146 Speocarcinus californiensis 17, 190; PL. IX, fig. 1 Sphzeroma oregonensis 214 pentodon 214-215, fig. 96 Spirontocaris affinis 9, 58, 60, 77 amabilis 9, 58, 61, 79 arcuata 9, 57, 60, 64-65; PL. Im, fig. 43 fig. 20 avina 10, 59, 60, 103-105, fig. 47 barbata 9, 58, 60, 82-83, fig. 35 belcheri 9, 59, 60, 86-87; PL. III, figs. 3, 34 bispinosa 9, 57, 60, 68-69, fig. 23 biunguis 10, 58, 60, 97-08, fig. 44 brachydactyla 10, 59, 60, 93-04, fig. 41 brevirostris 10, 60, 99 camtschatica £0, 59, 60, (78), 94-95; fig. 42 carinata 9, 58, 60, 84 cristata 10, 60, 102-103, fig. 45 dalli 9s 575 60, 72-735 fig. 27 decora 9, 58, 60, 79-80, fig. 33 fabricii 9, 58, 60, 85 flexa 9, 58, 60. 78-79, fig. 32 gaimardii 87, (87), (89), (91) gibba (86) gracilis 9, 58, 61, 77-78, fig. 31 greenlandica 9, 56, 60, 61-62 INDEX Spirontocaris herdmani 10, 60, 100-101 key to species 56-61 kincaidi 10, 59, 60, 95-06, fig. 43 lamellicornis 9, 57, 60, 62-63, fig. 18 layi 10, 59, 61, 96-97 liljeborgii 9, 57, 60, 63 macilenta 10, 59, 60, 105 macrophthalma 10, 59, 60, 105-107, fig. 48 maxillipes 10, 59,60, 92-93, fig. 40 moseri 10, 59, 60, 91-92, fig. 39 murdochi 9, 57, 60, 66-67; PL. Ill, fig. 6; fig. 21 ochotensis 9, 57, 60, 71-72, fig. 26 palpator 10, 60, 98-99 paludicola 10, 58, 60, 1or phippsii 9, 57, 60, 70-71 picta 10, 59, 60, IOI polaris 9, 58, 60, 73-74 prionota 9, 56, 60, 61 pusiola 10, 60, 99-100 sica 9, 57, 60, 69-70, fig. 25 sitchensis 10, 59, 60, 102 snyderi 9, 57, 60, 69, fig. 24 spina 9, 57, 60, 63-64; PL. III, fig. 5; fig. 19 stoneyi 10, 60, 103, fig. 46 stylus 9, 58, 60, 84-85, fig. 36 suckleyi 10, 59, 60, 89-91, fig. 38 taylori 10, 59, 60, 101 townsendi 10, 59, 60, 87-89, fig. 37 tridens 9, 58, 60, 81-82, fig. 34 truncata 9, 57, 60, 67-68, fig. 22 unalaskensis 9, 58, 60, 74-75, fig. 28 vicina 9, 58, 60, 75-76, fig. 29 washingtoniana 9, 58, 60, 76-77, fig. 30 337 Squilla entomon (216) Stenosoma gracillimum (216) Stenothe alaskensis 236-238, figs. 121, 122 Sympleustes glaber 238 Synidotea consolidata 220, figs. 99, 101 ritteri 219-220, figs. 99-101 Tanystylum 277 intermedium 251, 259, 277, 278-280; PL, XXI, figs. 7-9; PL. XXII, figs. I- 7; PL. XXIIl, figs. 1-3 Telmessus cheiragonus 16, 179 Terminology, Pycnogonids 256-257 Trichocarcinus dentatus (175) gibbosulus (176) oregonensis (178) recurvidens (178) walkeri (178) Trichocera oregonensis (178) Trichoniscus papillicornis 227-228, figs. 113-117 Tryphosa nugax 234-236, figs. 119, 120 Uca crenulata 17, 190 stenodactyla (190) Upogebia pugettensis 12, 153 Urocaris infraspinis 8, 31-33, fig. 10 longicaudata 33 Xanthias latimanus 16, 185 taylori 16, 185 Xantho bella (180) Xanthodes hemphillii 180 leucomanus (182), (183) 3 . 4 => se} ~ : - i. -_ nh” i” ri *)) ce Wt ce ? ‘< ys i 7 a : * is. aF , aks ar = a ee y we = TS / 7 a, ue oe tA . % P 3-8 Oo St ae ~~ " } ~— i. es 7% OO ae , Me, >. 2 wns : “ ae 2 b aor: iy - >. 4 »”* 2 ‘ r on eh ’ - Se = : ' - ay a ‘- i. - a4 ‘a — ee en = be z .7 3 ~*~ = . af ve 2 ~. a Q Harriman Alaska Expedition 115 Harriman Alaska series H37 v.10 PRA Sci. PLEASE DO NOT REMOVE CARDS OR SLIPS FROM THIS POCKET UNIVERSITY OF TORONTO LIBRARY i | | | | See