2& REPORT OF THE CANADIAN ARCTIC EXPEDITION 1913-18 VOLUME IX: ANNELIDS, PARASITIC WORMS , PROTOZOANS, ETC. PART B: POLYCHAETA By RALPH V. CHAMBERLIN SOUTHERN PARTY— 1913-16 OTTAWA THOMAS MULVEY PRINTER TO THE KING'S MOST EXCELLENT MAJESTY 1920 Issued November 16, 1920 Report of the Canadian Arctic Expedition 1913-18. VOLUME IX: ANNELIDS, PARASITIC WORMS, PROTOZOANS, ETC. Part A: OLIGOCHAETA. Lumbriculidae. By Frank Smith. Enchytraeidae. By Paul S. Welch. (Issued September 29, 1919}. Part B: POLYgHAETA. By Ralph V. Chamberlin (In press}. Part C: HIRUDINEA. By J. P. Moore (In preparation). Part D : GEPHYREA. By Ralph V. Chamberlin (Issued June 20, 1920). Part E: ACANTHOCEPHALA. By H. J. Van Cleave (Issued April 7, 1920}. Part F: NEMATODA. By N. A. Cobb (In preparation). Part G: TREMATODA. By A. R. Cooper (In preparation). Part H: CESTODA. By A. R. Cooper (In preparation). Part I: TURBELLARIA. By A. Hassell (In preparation). Part J: GORDIACEA. Part K: NEMERTINI.. Part L: SPOROZOA. ByJ.W.Mavor (In preparation}. Part M : FORAMINIFERA. By J. A. Cushman (Issued February 6, 1920} . REPORT OF THE CANADIAN ARCTIC EXPEDITION 1913-18 VOLUME IX: ANNELIDS, PARASITIC WORMS, PROTOZOANS, ETC. PART B: POLYCHAETA By RALPH V. CHAMBERLIN SOUTHERN PARTY— 1913-16 OTTAWA THOMAS MULVEY PRINTER TO THE KING'S MOST EXCELLENT MAJESTY 1920 71927—1 Issued November 16, 1920 The Polychaetes Collected by the Canadian Arctic Expedition, 1913-18. By RALPH V. CHAMBERLIN. Museum of Comparative Zoology, Cambridge, Mass. Polychsetes were collected by the Canadian Arctic Expedition at various points along the North American Coast from southern Alaska northward and eastward to Bathurst inlet, Northwest Territories, by far the greater amount of material coming from the regions about Grantley harbour (port Clarence) and Collinson point, Alaska, and from Dolphin and Union strait and particularly Bernard harbour, Northwest Territories. Twenty-five species were represented in the material secured east of the mouth of the Mackenzie river and twenty-two from the region west of this point. By far the greater part of the material was taken along shore at small depths. A few forms are pelagic and a few were dredged from a depth of a hundred meters in Dolphin and Union strait. The pelagic forms include several spionid larvae and one larval Paranaitis. The specimens were collected by Mr. F. Johansen on the expedition from 1913 to 1916. This report covers also some other annelid material from northern regions received for identification from the Canadian Geological Survey, this embracing collections made in Hudson bay and Hudson strait by the Neptune and Diana expeditions, a few forms from the eastern side of Hudson bay collected by A. P. Low, and several additional forms from British Columbia and Halifax. As was to be anticipated, the species represented are for the most part well-known and mostly widespread arctic and subarctic forms, the polychgete fauna of the Arctic being one of the longest studied and best known in the world. All the species taken by the Arctic Expedition east of the Mackenzie river were forms previously well known from Greenland and other arctic locali- ties. West of the Mackenzie, where the rich Bering Sea fauna was approached or entered, the collections yielded seven previously undescribed species. In addition a new Nepthys is described from material taken by the Neptune in Hudson bay and a new Chone from that taken by the Diana in Hudson strait. Thus the report includes descriptions of nine new species from the total of forty-nine. The following lists indicate the forms secured at the several general localities. BRITISH COLUMBIA. Halosydna lordii (Baird). . Serpula vermicularis Linne. PORT CLARENCE, ALASKA. Harmothoe imbricata (Linne). Arctonoe lia, n. sp. Paranaitis sp., larvae. Psammate aphroditoides (Fabricius). Spionid, larva. Cistenides granulata (Linne). COLLINSON POINT, ALASKA. Antinoe sarsi Kinberg. Ephesiella minuta (Webster and Bene- dict). Spio mimus, n. sp. Scolecolepides arctius, n. sp. 71927— 1J Anaspio boreus, n. sp. Terebellides stroemi Sars. Ampharete johansem, n. sp. Ampharete reducta, n. sp. OTHER ALASKAN LOCALITIES (MOSTLY SOUTH OF POINT BARROW.) Aphrodite sp. (Beaufort Sea, Sta. 29/.) Autolytus prismaticus (Fabricius). (Sta. 6, 14, 17, 21, 57a.) Autolytus alexandri (Malmgren). (Sta. 17). Spionid, larva Bb. (Martin point, Sta. 32c). Terebellides stroemi Sars. (Sta. 23). Samytha sexcirrata (Sars). (Sta. 23). Ampharete eupalea, n. sp. (Sta. 23). Circeis spirillum (Linne) (Prince Wil- liam sound, Sta. 60a). 4B Canadian Arctic Expedition, 1913-18 DOLPHIN AND UNION STRAIT, NORTH- WEST TERRITORIES. Harmothoe imbricata (Linne*). Gattyana cirrhosa (Pallas). Nepthys ciliata (Miiller). Autolytus prismaticus (Fabricius). Onuphis conchylega Sars. Lumbrinereis sp. Spionid, larva Ba. Flabelligera affinis (Sars). Cistenides granulata (Linne*). Spirorbis spirorbis (Linne*). Circeis spirillum (Linne*). BERNARD HARBOUR, NORTHWEST TERRITORIES. Harmothoe imbricata (Linne*). Pholoe minuta (Fabricius). Evarnella impar (Johnston). Antinoe sarsi Kinberg. Gattyana cirrhosa (Pallas). Anaitides groenlandica (Oersted). Eteone long a (Fabricius). Psammate aphroditoides (Fabricius). Nereis pelagica Linne". Cirratulus cirratus (0. F. Miiller). Arenicola marina (Linne). Flabelligera affinis (Sars). Brada villosa (Rathke). Nicolea venustula (Montagu). Cistenides granulata (Linne). Capitella capitata (Fabricius). Euchone analis (Kroyer). Spirorbis spirorbis (Linne*). Circeis spirillum (Linne*). BATHURST INLET, NORTHWEST TERRI- TORIES. Travisia forbesii Johnston. MELVILLE ISLAND, NORTHWEST TERRI- TORIES. Anaitides groenlandica (Oersted). HUDSON BAY. Harmothoe imbricata (Linne*). Nepthys hudsonica, n. sp. Nereis pelagica (Linne*). Lumbrinereis fragilis (O. F. Miiller). Cistenides granulata (Linne*). HUDSON STRAIT. Harmothoe imbricata (Linne"). Lagisca rarispina (Sars). Nereis pelagica Linne. Paraxiothea catenata (Malmgren). Amphitrite cirrata (Miiller). Thelepus cincinnatus (Fabricius). Chone ungavana, n. sp. Circeis spirillum (Linne*). HALIFAX, NOVA SCOTIA. Spirorbis spirorbis (Linne). POLYNOIDAE. Harmothoe imbricata (Linns'). 1084. Selsk. Skrifter, 1766. 1768. 1776. 1822*. 1828. 1843. 1853. 1865. 1865. p. 66, pi. 9, f. SA-SE. Numerous examples of this widespread species occur in the collection of the Canadian Arctic Expedition. The species is common in the Atlantic on the North American shore from the Arctic regions south to Cape Cod, and on the European Aphrodita imbricata LINNE, Syst. Nat., ed. 12, vol. 1, p. Aphrodita violacea STROEM, Kongl. Norsk. Vidensk. Deel 4, p. 366. Aphrodita cirrata O. F. MULLER, Prodr. Zool. Dan., p. 218. Aphrodita lepidota 0. F. MULLER, ibid., p. 218. Polynoe cirrata SAVIGNY, Syst. Annel., p. 26. Eumolpe cirrata BLAINVILLE, Diet. Sci. Nat., 57, p. 459. Lepidonotus cirratus OERSTED, Groenl. Ann. Dorsibr., p. 14, f. 1, 5, 6, II, 14, 15. Aphrodita varians DALYELL, Pow. Great., 2, p. 168, pi. 24, f. 11, 12. Lepidonotus cirrosus QUATREFAGES? Syst. Annel., p. 261. Harmothoe imbricata MALMGREN, Ofvers. af K. Vet.-Akad. Forh., no. 1, Polychaeta 5 B shore to southern England. In the Pacific it ranges south to San Diego on the American coast, and to Japan on the Asiatic. It is well known from the shores of Greenland, Davis strait, etc., and the present collection extends its known distribution along the northern Canadian shores to Alaska. LOCALITIES. — Alaska: Grantley harbour: Teller. Stations 206-c. July 30, 1913. Many specimens taken at a depth of 2-3 fathoms. Alaska: Port Clarence bay. Station 200. August 4, 1913. Numerous mostly large, specimens taken at a depth of 2-3 fathoms on a muddy bottom among " thread algae." Dolphin and Union strait. Station 43c. September 14, 1915. Several specimens taken at a depth of 20-30 meters on a bottom of gray mud with stones and algae. Northwest Territories: Bernard harbour, outer part. Station 41. July 20, 1915. Numerous specimens taken at a depth of 10 meters on a muddy bottom among Laminaria. Northwest Territories: Bernard harbour. Station 376. August 25, 1914. Several specimens taken at from 2 to 3 fathoms on a rocky and sandy bottom among Laminaria, etc. Northwest Territories: Bernard harbour. Station 37e. September 1, 1914. Many specimens taken at from 1 to 3 fathoms on a sandy bottom among algae. Northwest Territories: Bernard harbour. Station 416. July 24, 1915. Several specimens taken at a depth of about 5 meters. Northwest Territories: Bernard harbour, outer part. Station 41/. August 1, 1915. Three specimens taken at 5 meters. Northwest Territories: Hudson bay, west side: Fullerton. Neptune Ex- pedition. A. Halkett, collector, September 19, 1904. Davis strait: Ungava: Port Burwell. Neptune Expedition. A. Halkett, collector, 1903-04. One small specimen lacking elytra. Lagisca rarispina (Sars). 1860. Polynoe rarispina SARS, Forh. Vid. Selsk. Christiania, p. 60. 1865. Lagisca rarispina MALMGREN, Ofvers. af K. Vet. Akad. Forh., p. 65. Eight specimens conforming to this species are in the collection from Hudson strait. Unfortunately they have lost all their elytra. The largest specimen is 46 mm. long. This species is common along the shores of Greenland and also occurs about Iceland, Spitzbergen, Norway and southward into the North sea, Finmark, Nova Zembla, and the Kara sea. LOCALITY. — Hudson strait: Ungava: Port Burwell. Neptune Expedition, 1903-04. A. Halkett, collector. Pholoe minuta (Fabricius). 1780. Aphrodita minuta FABRICIUS, Fauna Groenl., p. 314. 1822. Polynoe minuta SAVIGNY, Syst. Annel., p. 26. 1828. Palmyra ocellata JOHNSTON, Zool. Journ., 3. p. 329. 1839. Pholoe inonata JOHNSTON, Ann. Nat. Hist., 2, p. 437, pi. 23, f. 1-5. 1843. Pholoe minuta OERSTED, Groenl. Annul. Dorsibr., p. 169, pi. I, f. 3, 4, 8, 9, 16. — . Pholoe baltica OERSTED, Annel. Dan. Consp., p. 14, f. 21, 34-36, 40. 1844. Pholoe assimilis OERSTED, Kroyer Nat. Tidsskr., Anden Raekke, I, p. 404. 1896. Pholoe eximia MICHAELSEN, Polychaet. Fauna, p. 12, pi. I, f. 2. LOCALITY. — Northwest Territories: Bernard harbour: inner harbour. Sta- tion 37 e. September 1, 1914. Two fragments together composing a complete individual taken in a sandy bottom among algae. Northwest Territories: Bernard harbour. Station 41c. July 28, 1915. Two pieces of a larger individual taken at 3-8 fathoms on a bottom of sandy mud with algae. 6 B Canadian Arctic Expedition, 1913-18 Arctonoe, n. gen. Body of moderate length, tapering caudad. Number of segments moderate. Prostomium l.caiinjj; three tentacles which are inserted marginally. Cera- tophores distinct, the styles short and thick, each more or less enlarged proximad nf tin- >lrinlrr t rrmiu:il 'filament. Palpi long, with a slender terminal filament. Tw<> pain of eyes, these typically on posterior half of prostomium. Parapodia biramous, but with the notopodia much reduced. Notocirri with rirrophores large, the styles moderate, with terminal filaments. Neurocirri excepting the first, very small. I '.mil notopodial and neuropodial setae present, both simple. Notopodials shorter, setose or scaled, distally notched or bidentate. Neuropodials of first postperistomial segment slender, distally bidentate, scaled. The neuropodials of succeeding segments, excepting sometimes one group of those on second parapodia, coarser, with curved hastate heads and simple tips which are not prolonged., more weakly scaled or serrulate. Elytra present on somites II, IV, V, VII, IX, etc., as in Halcsydna, with typically near thirty-five pairs present. Genotype. — A. lia, n. sp. This genus is nearest to Halosydna, of which H. patagonica Kinberg (= H. hrcrisetosa Kinberg) may be regarded as the type. It is separated from this genus primarily because of the difference in the notopodial setae, which are distally incised or bidentate, and in the neuropodials of the first parapodia, which are distally bidentate, instead of both neuropodials and notopodials of these parapodia being prolonged into fine, hair-like, entire tips. Arctonoe includes also a second Pacific form, S.fragilis (Baird), which is closely related to the genotype. Arctonoe lia, n. sp. Type specimen. — Catalogue No. 26, Victoria Memorial Museum, Ottawa. Paratypes, Victoria Memorial Museum, No.'s 27, 28; Museum Comparative Zoology, No.'s 2190 and 2191. Five specimens. General colour of the body pale yellow. The elytra in general practically colourless, or slightly whitish, and translucent to transparent, or nearly so. The body is of moderate length. It is widest over about the second fourth of its length in front of which it narrows a little and back of which it narrows continuously and decidedly. The type is 25 mm. long, with a maximum width, to ends of setae, of 4-5 mm. The number of segments appears to be typically between 55 and 60, though none of the types is entirely complete at the caudal end, the maximum number actually present being 56. The prostomium continues into the ceratophores of the lateral tentacles anteriorly, though rising back of the base of each of these in a rounded elevation, the ceratophores often rather abruptly set off; with a median notch anteriorly in which the median tentacle is inserted. All tentacles short and proportionately thick, with terminal filaments as shown in PI. I, fig. 1. The palpi are much longer than the tentacles, subcylindrical, distally abruptly narrowed into a terminal filament. Two pairs of eyes are present on the posterior half of the prostomium of which those of the anterior pair are slightly the larger and are much more widely separated. The posterior eyes are more strictly dorsal in position and are near the caudal border. The tentacular cirri, i.e., the cirri of the peristomial parapodia, are attached at the level of the base of the ceratophores of the lateral tentacles. They exceed the tentacles, which they resemble in form, in length, and the ventral on each side is shorter than the dorsal. The metastomial segments are moderately convex above and a little less so ventrally, with a distinct neural furrow. Intersegmental furrows distinct. Most segments divided above by a more or less distinct transverse sulcus. Polychaeta 7 B The parapodia are rather short and subcylindrical, but a little compressed anteroposteriorly. The neuropodia rise somewhat at the distal end above and show the usual sub vertical setigerous groove across the end and above. The notopodia are small elevations arising from the dorsum of the parapodia toward the anterior side and distad of a cylindrical, finger-like process into which the aciculum extends and the cirrophore. The notocirri are attached at the bases of the parapodia above. The notocirrophore is large, a little narrowed distad, and much exceeding the style in thickness. The latter is of moderate length, expands toward distal end, and terminates in a slender, abruptly set-off filament. Mesad of each cirrophore on the cirriferous segments is a subconical process in line with the elytrophores than which it is smaller. The neurocirri in general arise ventrally proximad of the middle, the position in the posterior region becoming more toward the caudal side. The cirrophores are proportionately very thick and distally truncate. The styles in general are abruptly narrower, short, and very thickly subfusiform or ovoid, with abruptly thinner, filiform tips short. (See PL I, fig. 2). The neurocirri of the first normal parapodia, however, are much longer, attaining or exceeding the end of the parapodia proper, and clavate in form proximad of the tip, being closely similar to the notocirri. The notopodial setae are present, though reduced to very few in going caudad. They are numerous on the first parapodia, on the second are fewer while on those of the posterior region they are reduced to only one or two or none. They are much shorter than the neuropodials. They are flat and curved, sword-shaped, incised or bidentate at the tip, and scaled along one side. (PL II, fig. 1.) The neuropodial setae, excepting those of the first parapodia, and some- times in part of one or a few following, distally with moderately hastate heads which are curved. (PL 2, fig. 3.) The neuropodial seta? of the first parapodia are all bidentate at the tip and finely scaled along the convex edge of the head. (PL II, fig. 2.) In the second parapodia the supraacicular group of setse remain of this same character, though coarser and longer, while the subaciculars are still coarser, with heads more strongly curved, the tips entire, and the edges smooth excepting for a few weak serrations. (See PL II, fig. 3.) Farther caudad both supraaciculars and subaciculars have the latter, essentially smooth, form with entire tips. The notopodials in the first parapodia are not thinner, though shorter, than the neuropodials but they are finer than the ordinary neuropodials farther caudad. The elytra thin though moderately tough. They are subcircular in outline and are attached midway between their centres and their ectal edges. Surface smooth, appearing wholly to lack tubercles and cilia. '(P\. I, figs. 3, 4.) While they overlap in the series along each side, those of the opposite sides do not overlap mesally, thus leaving a middorsal naked stripe. They occur upon somites II, IV, V, VII, IX, and similarly on alternate somites to XXIII; then on somites XXVI, XXVIII, XXIX, XXXI, XXXIII, XXXV, etc., about twenty-five or more pairs being present. LOCALITIES. — Alaska: Grantley harbour: Teller. Station 206-c. July 30, 1913. Depth, 2-3 fathoms. Bottom, sandy. Alaska: Port Clarence bay. Station 20g. August 4, 1913. Same depth, etc. This species much resembles S. Jragilis (Baird), a form common on the Pacific coast farther south. It is a rather more slender form with coarser setae. The notopodials in general are much more numerous. The species may be distinguished at once by the setae of the second parapodia, fragilis lacking the special supraacicular group of apically bidentate neuropodials present in lia. Evarnella impar (Johnston). 1839. Polynoe impar JOHNSTON, Ann. Nat. Hist., 2, p. 436, pi. 22, f. 3-9. 1840. Lepidonotus impar OERSTED, Annul. Dan. Consp., p. 13. — . Lepidonotus impar GRUBE, Fam. AnneL, p. 36. 8B Canadian Arctic Expedition, 1913-18 1865. Evarne impar Malmgren, Ofvers. af K. Vet. Akad. Forh., p. 71, pi. 9, f. 7A-7D. 1888. Harmothoe impar ST. JOSEPH, Ann. Sci. Nat., ser. 7, 5, p. 162. 1896. Harmothoe impar, var. Pagenstecheri MICHAELSEN, Polychaet. Fauna, p. 7, pi. I, f. I. 1919. Evarnella, nom. nov. pro Evarne (nom. preocc.), CHAMBERLIN, Mem. Mus. Comp. Zool., 48, p. 40. Two specimens seeming fully to agree with this species so far as may be judged in the absence of elytra, all of which are lost. The larger specimen is 21 mm. long, with a width across setae of 7-2 mm. Proboscis 5-8 mm. long. LOCALITY. — Northwest Territories: Bernard harbour, outer part. Station 41. July 20, 1915. Depth, about 10 metres. Bottom, mud with Laminaria and Delessaria. Antinoe sarsi Kinberg. 1865. Antinoe sarsi Kinberg, MALMGREN, Ofvers. af K. Vet. Akad. Forh., p. 79, pi. 9, f. 6A-6E. 1879. Polynoe sarsi THEEL, Annul. Nov. Zembla, p. 16. 1912. Harmothoe sarsi DITLEVSEN, Annul. Danmark Exped., p. 415. This is another species common in arctic and northern waters of both hemispheres. It is abundant on the Siberian coast, in Bering sea and along Kamchatka, as well as on the European and North American coasts. It has been taken at several points along the coast of Greenland where nearly all the captures have been of single individuals. The Canadian Arctic Expedition took two specimens at each of the two first of the following stations and one at the third. LOCALITIES. — Northwest Territories: Bernard harbour. Station 41. July 20, 1915. Depth, about 10 metres. Northwest Territories: Bernard harbour, outer part. Station 41c. July 28, 1915. Depth, about 5 fathoms. Alaska: off Collinson point. Station 27e. September 17, 1913. At the last-named station was taken one specimen noted in the field journal as "pelagic under ice at one foot water." It is further noted by Mr. Johansen that " The Polynoid came up with the water as the hole was cut in the ice. It swam quickly along by moving its parapodia successively (as a myriopod), but not (or only to a small degree) by wriggling its body as pelagic chsetopods generally do." The specimen is somewhat aberrant in structure from the ordin- ary non-pelagic form. Gattyana cirrhosa (Pallas). 1766. Aphrodita cirrhosa PALLAS, Miscell. Zool., p. 95, pi. 8, f. 3-6. 1780. Aphrodita scabra FABRICIUS, Fauna Groenl., p. 311. — . Aphrodita punctata FABRICIUS, ibid., p. 311. 1815. Aphrodita viridis MONTAGU, Trans. Linn. Soc., II, p. 18, pi. 4, f. I. 1826. Eumolpe scabra BLAINVILLE, Diet. Sci. Nat., 57, p. 459. 1834. Polynoe scabra AUDOUIN and MILNE EDWARDS, Annel., p. 87. 1839. Polynoe viridis JOHNSTON, Ann. Nat. Hist., 2, p. 437. 1843. Lepidonotus assimilis OERSTED, Annul. Dan. Consp., p. 13, f. 3, 6, 14, 32, 33, 37, 38, 45, 46. 1858. Harmothoe scabra KINBERG, Annul. Eugen. Resa, p. 21. 1861. Polynoe scabriuscula SARS, Forh. Vid. Selsk., p. 61. 1864. Ledidonotus drratus var. parasiticus BAIRD, Trans. Linn. Soc., p. 161. 1865. Lepidonotus imbricatus JOHNSTON, Cat. British Annel., p. 118. 1865. Nychia drrosa MALMGREN, Ofvers. af Vet. Akad. Forh., p. 58, pi. 8, f . I-IE. 1886. Iphione muricata GIBSON, Verm. Liverpool, p. 150. 1890. Nychia drrosa, var. Choetopteri MALMGREN, Ann. Boulon., 15, pi. I, f. 7e-7d. 1897. Gattyana drrosa MC!NTOSH, Ann. Nat. Hist., ser. 6, 20, p. 167. Polychaeta 9 B This northern form is exceedingly common in the fjords of Greenland and is known also from Davis strait. From this region it ranges along the American coast to the gulf of St. Lawrence, to the northern European shores and south- ward to Ireland. It has been dredged in the Atlantic at a depth of 580-630 fathoms (Porcupine). The collections of the Canadian Arctic Expedition extends the range westward to Bernard harbour and other points on Dolphin and Union strait. LOCALITIES. — Northwest Territories: Bernard harbour. Station 37 1- October 19, 1914. Several specimens taken at a depth of about one fathom on a bottom of sandy mud among algae. Northwest Territories: Dolphin and Union strait: west of Cockburn point. Station 43c. September 14, 1915. Several specimens from a depth of 20-30 metres on a bottom of grey mud with stones and algae. Halosydna lordii (Baird). 1863. Lepidonotus lordii BAIRD, Proc. Zool. Soc. Lond., 1863, p. 107. 1865. Halosydna lordii, Journ. Linn. Soc. Lond. Zool., 8, p. 190. 1897. Polynoe lordi JOHNSON, Proc. Cal. Acad. Sci., ser. 3, Zool., i, p. 175, f. 35, 44, 51. LOCALITY. — British Columbia: Queen Charlotte islands. One specimen. The specimen has the characteristic cross-markings of dark pigment with the broader solid band across somite VIII. It is a common form on the western North American coast from San Diego northward to Alaska but is less common in the more southern part of this range. APHRODITIDAE. Aphrodita sp. Two fragments of an Aphrodita taken from the stomach of a Phoca hispida Schreber are not in condition to permit specific identification. The Phoca was taken April 4, 1914, off the coast of Yukon Territory at Station 29/. (latitude 70° 13' N., longitude 140° 50' W.) Water depth about 30 fathoms. NEPTHYDIDAE. Nepthys cilia ta (Muller). 1789. Nereis ciliata 0. F. MULLER, Zool. Danica, 3, p. 14. 1843. Nepthys ciliata RATHKE, Beitr. Fauna Norweg., p. 171. — Nepthys borealis OERSTED, Annul. Dan. Consp., p. 32. — . Nepthys caeca (ex. part.), OERSTED, Groen. Annul. Dorsibr., p. 194. 1865. Diplobranchus ciliatus QUATREFAGES, Hist. Annel., I, p. 434. Two fragments of this species are in the collection. This is a species of circumpolar distribution, having been previously recorded from Spitzbergen, Nova Zembla, Kara sea, Siberia, Alaska, Prince of Wales island, Davis strait, Greenland, Iceland, Faroe islands, and southward in the Atlantic to the United States and France. LOCALITY. — Northwest Territories: Dolphin and Union strait: off Cockburn point. Station 43a. September 13, 1915. Depth, about 100 metres. Bottom, mud with pebbles, no algae. Two fragments, an anterior and a posterior, perhaps parts of the same individual. 10 B Canadian Arctic Expedition, 1913-18 Nepthys hudsonica, n. sp. Type specimen.— Cat. No. 51, Victoria Memorial Museum, Ottawa. Paratype, Mus. Comp. Zool. Two specimens. The general colour of the type is light brown of a weakly pinkish tinge. There is a distinct median longitudinal dark line along the dorsum, the ventral neural line being also somewhat darker. The paratype is darker, particularly so in spots proximad of some parapodia above and on part of the presetal lobes. The type is composed of eighty-six somites. It has a total length of 69 mm., exclusive of the proboscis which is only partially protruded. The maximum width is 5 mm., this being at the anterior end near the eighth somite, this end of the body being relatively broader, much less narrowed cephalad, than, e.g., in N. caeca. From this widest region the body narrows at first more rapidly and then very gradually to the caudal end. The prostomium is somewhat trapeziform with middle of the narrower caudal end somewhat angularly produced, the form thus somewhat subpenta- gonal; anterior margin broad, gently convex. Anterior region not protruding forwards as it does in caeca and ciliata. Posterior tentacles attached on each side at ectal end of anterior margin but little farther caudad than the corres- ponding anterior tentacle. Tentacles proportionately short and thick, much less slender than in ciliata, the posterior or outer ones stouter and a little longer than the inner ones • (PL II, fig. 4.) On each side at caudolateral angle is a prominent sensory papilla. The mouth appears not to be bordered by such .fleshy lateral lips with papillae as are so prominent in caeca, etc. The broadly triangular membrane appearing at the caudal edge of the mouth like a lower lip shows transverse sulci or folds in place of the usual longitudinal ones. The first setigerous somite is incomplete, being evident only on each side of the prostomium, from which it extends to the border of the mouth on each side, being thus incomplete both dorsally and ventrally. It bears only the notopodia as usual. The second somite, bearing also only notopodia, is complete above though the caudal angle of the prostomium extends into it and nearly bisects it. In the succeeding somites the parapodia are biramous. (See PL II, fig. 4.) The notopodia of the second somite are farther dorsad than those of the first and than those of the third, those of the succeeding somites descending to the sixth or seventh after which they remain at the same level. The first two pairs of notopodia have the same general structure as the succeeding ones, though slender and with the branchial appendages shorter and more conical, these being the so-called tentacular cirri of Ehlers. In a typical parapodium the postsetal lamella of the notopodium is a low convex lobe highest subvertically and decreasing and disappearing distad in strong contrast with the prominent lobe of caeca and lower than usual in ciliata, ordinarily not exceeding the summit of the lobe. The branchial appendage is long and ordinarily curved in a semi- circle with its concavity ectodorsad. The cirrus, arising from the base of the branchial appendage, is slender and subulate. The neuropodium is broad, widening distad and with the distal end long, gently convex and mesally incised like that of the notopodium. Postsetal lamella low, short, scarcely exceeding the apex of the lobe. (See PL II, fig. 5, 6.) The acicula are dark. The tip of each extends into a projecting conical papilla as usual. The setae have the usual general arrangement. The coarse posterior setae are dark, while the fine, camerated anterior setae are pale. (See PL II, fig. 5). The anus is terminal. From its thickened ventral edge arises a median tapering cirrus of moderate length which reaches only to the penult setigerous segment. The proboscis as extended in the paratype is 3-6 mm. long and widens from base to bevond middle where it is 3-4 mm. wide. Bearing twenty-two Polychaeta 11 B longitudinal rows of papillae as in members of the ciliata group, with a similar long dorsal papilla. LOCALITY. — Hudson bay: east side, Richmond gulf. June, 1899. Depth, 15 to 25 fathoms. Two specimens. A. P. Low, collector. This species resembles ciliata in the general form of the parapodia and shortness of its setae; but it is conspicuously different in the form and relations of the prostomium. In ciliata this is more quadrate, with the anterior region projecting farther forward obviously beyond the edge of the first segment with anterolateral corners subrectangular, and the posterior tentacles borne decidedly farther caudad on the nearly longitudinal free lateral edges instead of being at essentially the same level with the anterior pair as they are in the species above described. PHYLLODOCIDAE. Anaitides groenlandica (Oersted). 1842. Phyllodoce groenlandica OERSTED, Nat. Tidsskr., 4, p. 121. 1867. Phyllodoce badia MALMGREN, Annul. Polychset., p. 22. 1867. Phyllodoce lutkeni MALMGREN, ibid., p. 24. 1882. Phyllodoce arctica HANSEN, Norske Nordh. Exped., 3, pt. 7, Zool., p. 31. — . Anaitides groenlandica Czerniawsky, Bull. Soc. Imper. Nat. Moscou, 57, p. 158. This is a well-known northern form of apparently circumpolar distribution common on the shores of Greenland, Nova Zembla and Spitzbergen and less common on the shores of Finmark, Norway and Sweden and southward to Ireland and the gulf of St. Lawrence. It has also been recorded from Siberia, Bering strait, and Bering sea. LOCALITIES. — Northwest Territories: Bernard harbour, outer part. Station 4 If. August 1, 1915. One specimen taken at a depth of 2-3 fathoms on a bottom of sandy mud with stones and algae. Winter harbour Melville island, May 5, 1909. F. Hennessey. One fully developed specimen, taken in 7-5 fathoms of water. Arctic Expedition. Eteone longa (Fabricius). 1780. Nereis longa FABRICIUS, Fauna GroenL, p. 300; Naturh. Selsk. Skr., 5 I, p. 171, pi. 4, f. 11-13. 1843. Eteone. longa OERSTED, Groenl. Annul. Dorsibr., p. 33, f. 20, 28. Three specimens of Eteone agree well with examples of E. longa from Green- land, the type locality, in the Museum of Comparative Zoology at Cambridge, Mass. The specimens are dark and the largest has a length of 52 mm. The species has not been previously recorded excepting from the shores of Greenland, where it seems to be common. The closely related E. arctica Malmgren, which may possibly have been confused to some extent with the present species, has an apparently circumpolar distribution, having been listed from Davis strait, Spitzbergen, Finmark, Great Britain, Siberia, and Bering strait. LOCALITY. — Northwest Territories: Bernard harbour, outer part. Station 41. July 20, 1915. Depth, 3-5 fathoms. Sandy mud with algae. Paranaitis sp. Larva. A number of larvae of the species of this genus were secured in plankton along with spionid larvae and numerous Crustacea. They are in stages possessing from 13 to 20 setigerous segments. The fused first two segments in all form dorsally a conspicuous collar-like swelling. It is quite possible that these larvae pertain to P. wahlbergi (Malmgren) which has been recorded from Bering sea by Wire*nl and is a common and widespread form. iChaet.. Vega-Exped., Vetensk. lakttag., 1883, 2, p. 401. 12 B Canadian Arctic Expedition, 1913-18 LOCALITY. — Alaska: Grantley harbour. Station 20a, July 30, 1913. Sur- face. SYLLIDAE. Autolytus prismaticus (Fabricius). 1780. Nereis prismatica FABRICIUS, Fauna Groenl., p. 302. — . Nereis bifrons FABRICIUS, Ibid., p. 303 (Female). 1874. Proceraea gracilis VERRILL, Amer. Journ. Sci., p. 132, pi. 5, f. 1. 1883. ^.Autolytus alexandri LEVINSEN, Vid. Meddel. Nat. Forh. 1882, p. 247. pi. 7, f. 10. 1843. Polybostrichus longisetosus OERSTED, Groenl. Annul. Dorsibr., p. 182. 1867. Autolytus incertus MALMGREN, Annul. Poly chset., 1867, p. 35, pi. 6, f . 40-40E. Both sexes of the pelagic stage are represented in the collection, the males by many specimens. A female taken at cape Smyth, Alaska, bears a large brood-sac which has broken open, allowing most of the eggs to escape. This is a characteristically arctic species previously known from about Greenland, the type-locality, the North American Atlantic coast as far south- ward as Maine (Casco bay, Eastport), and Spitzbergen. The present records carry the known range in the Arctic westward to Alaska and Bering sea. LOCALITIES (all in surf ace) .) .—Off Alaska: Station 14 (latitude 54° 23' N., longitude 164° 45' W.) July 2, 1913. One small pelagic male. Bering sea, off Alaska. Station 17a and 176, c. (latitude 60° 9' N., longitude 167° 38' W.) July 6, 1913. About twenty-five pelagic males. Off Alaska, Station 66. (latitude 56° 26' N., longitude 133° 0' W.) Alaska: Cape Smyth, Station 57a. August 8, 1916. One pelagic female (Sacconereis) and one male (Polybostrichus). Alaska. Station 21d, e, f. (latitude 68° 48' N., longitude 165° 10' W.) August 16, 1913. Six pelagic males. Northwest Territories: Off Young point in Dolphin and Union strait. Station 506. July 17, 1916. One large pelagic male. Autolytus alexandri Malmgren. 1867. Autolytus alexandri MALMGREN, Annul. Polychaet., p. 37 (156), pi. 7, f. 39-39E. (Female or Sacconereis.) 1874. Stephanosyllis ornata VERRILL, Amer. Jour. Sci., 4, p. 132. (Stem form) . 1874. Stephanosyllis picta VERRILL, ibid., pi. 4, f. 6. Also as nomen nudum in text, p. 43. (Stem form.) 1864. Non Procerea picta EHLERS. Die Borstenwiirmer, p. 256. 1881. Autolytus alexandri VERRILL, Trans. Conn. Acad., 4, p. 294, pi. 12, fig. 8-8 A. (Male or Polybostrichus.) 1892. Autolytus verrilli MARENZELLER, Zool. Jahrb., Syst., 6, p. 416, pi. 19, fig. 4. This species is represented by two epitokous, or pelagic, males taken in the plankton net in Bering sea. It was previously known from off the coasts of Spitzbergen and Greenland and southward in the Atlantic to the shore of New England. LOCALITY. — Alaska: Bering sea. Station 17 a, 6, c (latitude 60° 9' N., longitude 167° 38' W.) Surface. Polychaeta 13 B HESIONIDAE. Psammate aphroditoides (Fabricius). 1780. Nereis aphroditoides FABRICIUS, Fauna Groenl., p. 296. 1867. Castalia Fabricii MALMGREN, Annul. Polychaet., p. 32. — . Castalia arctica MALMGREN, ibid., p. 32. 1908. Non Castalia arctica MC!NTOSH, British Annelids, 2, pt. I, p. 125. One entire and two incomplete specimens from Bernard harbour are refer- able to this species, as are also several from Port Clarence, Alaska. The Bernard harbour specimens are the larger, the complete one having a length of 17 mm., and are darker in colour. The Port Clarence specimens measure under 10 mm. in length. They are pale fulvous, in part of a weakly greenish cast; but no red lines, such as mentioned by Fabricius as frequently present, are detectable. In the character of the parapodia these specimens conform to Fabricius' original description, though differing obviously from the form taken on the west coast of Ireland at a depth of 90-125 fathoms, and described and figured by Mclntosh under the name Castalia arctica Malmgren.1 The parapodium in general form much more resembles that of P. punctata (0. F. Mliller), excepting for the presence of notopodial setae in the latter. It terminates similarly in three conspicuous papillae as mentioned by Fabricius. Mclntosh's figure shows the parapodium of his specimen to be strongly conical, relatively very deep at base, instead of having the longer, more nearly cylindrical form of the true arctica or aphroditoides, and to present but a single papilla at the end. The head of the British form is represented as anteriorly much more convex than in the specimens of aphroditoides secured by the Canadian Arctic Expedition. The British form seems not to be the same species, and may be tentatively designated as P. britannica} n. sp. P. aphroditoides has been previously recorded from Greenland, Siberia, and Bering strait. LOCALITY. — Alaska: Grantley harbour. Station 20 6, c. Depth, 2-3 fathoms. Bottom, sandy mud with algae. July 30, 1913. Alaska: Port Clarence. Station 20gr. Depth, 2-3 fathoms. Bottom, gray mud with brown and red algae. August 16, 1913. Northwest Territories: Bernard harbour. Station 37e. Depth, 2 fathoms. September, 1, 1914. SPHAERODORIDAE. Ephesiella minuta (Webster and Benedict). 1887. Ephesia minuta WEBSTER and BENEDICT, Kept. U.S. Comm. Fish, for 1885, p. 728, pi. 4, f. 64-66. LOCALITY. — Alaska: off Collinson point. Station 27s. October 3, 1913. Depth, 3 fathoms. Bottom, mud and gravel with algae. Two specimens from this locality seem not to differ from minuta, which was previously known from the coasts of Maine and Spitzbergen. Each is nearly 5 mm. in length. No seta with appendage in place was found, the specimens having been considerably rubbed. The capsules and papillae of the general surface appear to be typical, and the parapodia have the characteristic form and papillation. British Annelids, 1908, 2, pt. 1, p. 125, pi. 58, f. 14, pi. 63, f. 15, pi. 78, f. 3-3a. 14 B Canadian Arctic Expedition, 1913-18 NEREIDAE. x Nereis pelagica Linne*. 1758. Syst. Nat. ed. 10, I, p. 654. 1770. Nereis ferruginea GUNNER, Skrift. Kjobenh. Selskab., 10, p. 169, pi. E, f. 10. 1776. Nereis verrucosa 0. F. MULLER, Zool. Danica Prodr., p. 217. — . Nereis fimbriata 0. F. MULLER, ibid., p. 217. 1828. Nereis margaticera BLAINVILLE, Diet. Sci. Nat., 57, p. 470. 1829. Lycoris margaritacea JOHNSTON, Zool. Jour., 4, p. 420. 1829. Lycoris viridis JOHNSTON, ibid., p. 419. 1853. Nereis fulgens DALYELL, Pow. Great., 2, p. 153, pi. 22, f. 6-8. 1840. Nereis renalis JOHNSTON, Ann. Nat. Hist., 5, p. 176. (Epitokous male.) 1842. Heteronereis arctica OERSTED, Nat. Tidssk., 4, p. 117. (Epitokous female.) 1842. Heteronereis assimilis OERSTED, ibid., p. 117. 'Epitokous female.) 1843. Heteronereis arctica OERSTED, Groenl. Annul. Dorsibr., p. 179, f. 50*, 51, 60, 65, 68, 70*. (Epitokous male.) — . Nereilepas fusca OERSTED, Annul. Dan. Consp., p. 21, f. 49, 50. (Epitokous female). — . Nereis grandijolia H. RATHKE, Beitr. Fauna Norweg., p. 155, pi. 7, f. 13, 14. (Epitokous male.) 1853. Nereis denticulata STIMPSON, Inverteb. Grand Manan, p. 33, f. 23. (Epi- tokous female.) 1865. Nereis Reynaudi QUATREFAGES, Hist. Nat. Annel., I, p. 519. — . Nereis Bowerbanckii QUATREFAGES, ibid., I, p. 541. Seven large specimens, partly disintegrated, were taken from the stomach of Salvelinus malma Walb. at Be.nard harbour. In the probosces of these speci- mens the paragnatha of VI vaty from three to five, with four as the most fre- quent number, these being large in size as is typical. The paragnatha of I vary from one to four, in the latter case being arranged as at the angles of a diamond-shaped area instead of in a line, as is more usual. The band across VII and VIII with the smaller caudal paragnatha in all the specimens examined in fewer series than usual. A specimen from Port Bur well on Hudson strait is atypical in dentition, bearing in each area VI only two large stout teeth con- tiguous with each other in a transverse line. The minor posterior denticles of VII and VIII are comparatively few. This is a cosmopolitan species widespread in the Arctic and Antarctic oceans and in the Atlantic and Pacific oceans along the European, American, and European coasts. LOCALITIES. — Northwest Territories: Bernard harbour. Station 42d. September 3, 1915. Six specimens from stomach of Salvelinus malma Walb. Northwest Territories: Bernard harbour. Station 41u. August 24, 1915. One specimen from the stomach of a 30-inch Salvelinus malma Walb. Hudson bay: Northwest Territories: Fullerton. Neptune Expedition. September 19, 1904. A. Halkett. Two specimens. Hudson strait: Ungava: Port Burwell. Neptune Expedition, 1903-4. A. Halkett. Two specimens, one very small, with posterior portion of a third. Hudson strait: Ungava: King George's sound. Depth, 40 fathoms. Diana Expedition. September 9, 1897. Three small specimens. Polychaeta 15 B ONUPHIDIDAE. Onuphis conchylega Sars. 1835. Onuphis conchylega SARS, Beskr. og laktt., p. 61, pi. 10, f. 28a-28e. 1843. Onuphis Eschrichtii OERSTED, Groenl. Annul. Dorsibr., p. 20, pi. 3, f. 33-41, 45. 1851. Diopatra Eschrichtii GRUBE, Fam. AnneL, p. 43. 1865. Northia conchylega JOHNSTON, Cat. Worms Brit. Mus., p. 138. 1882. Onuphis hyperborea HANSEN, Nyt Mag. f. Natur. 24, p. 268. LOCALITY. — Northwest Territories: Dolphin and Union strait, off Stapylton bay. Station 436. September 14, 1915. Depth, 50-60 meters. Bottom, gray mud with pebbles; no algae. The anterior end, consisting of forty-two segments, of a single specimen was taken in situ in its tube. It is 40 mm. long with a width, exclusive of parapodia, of 3-6 mm. The anterior segments are crossed by reddish-brown stripes above, a stripe across the anterior border of each segment. The tube is composed of flattened pebbled, fragments of shells and grains of sand in the typical manner. This species is well-known from Norway, Finmark, Nova Zembla, Iceland, Greenland, Davis strait, Bering sea, the eastern coast of North America south to Florida and on the European south to Great Britain. In the more southern localities mentioned it is usually taken at depths of 40 fathoms and below. LUMBRINEREIDAE. Lumbrinereis fragilis (0. F. M tiller). 1776. Lumbricus fragilis O. F. MULLER, Zool. Danica Prodr., p. 216. 1825. Nereis fragilis BLAINVILLE, Diet. Sci. Nat., 34, p. 454. 1828. Scoletoma fragilis BLAINVILLE, ibid., 57, p. 492. 1833. Lumbrinereis fragilis AUDOUIN and MILNE EDWARDS, Ann. Sci. Nat., 28, p. 244. 1851. Lumbriconereis fragilis GRUBE, Fam. AnneL, p. 45. 1864, Lumbriconereis borealis Kinberg, Ofvers. af K. Vet.-Akad. Forh., no. 10, p. 568. One specimen referred to this species is among the material from Hudson bay. The individual is 180 mm. long, including a regenerated caudal region about 15 mm. long and consisting of about forty-five segments. The prostomium appears proportionately rather broader across base than usual. Maxillae II with five teeth. This form is abundant in northern waters, as about Greenland, Nova Zembla, Spitzbergen, Siberia, and Bering strait, and extends southward in the Atlantic along both the North American and the European shores. LOCALITY. — Hudson bay, East side, in Richmond Gulf. June, 1899. 15-25 fathoms. A. P. Low, collector. Lumbrinereis sp. A single specimen only 7 mm. long of uncertain species. LOCALITY: Arctic Canada: Dolphin and Union strait, off Cockburn point. Station 43a. September 13, 1915. Depth, 100 meters. Bottom, gray mud and pebbles. No algse. 16 B Canadian Arctic Expedition, 1913-18 SPIONIDAE. Spio mimus, n. sp. The one specimen of this form secured is about 15 mm. long. It is broadest anteriorly near the ninth somite, in front of which it is pointed and caudad of which it narrows continuously to the posterior end at first gradually and then more strongly. The specimen is complete and consists of forty-five segments or near that number. Type specimen. — Cat. No. 35, Victoria Memorial Museum, Ottawa. The prostomium protrudes anteriorly in a rounded process much as in S. filicornis. The sides are subparallel back to the level of the first parapodia from where they converge caudad, the caudal end of the prostomium being narrowly rounded and lying at the anterior edge of the second setigerous somite. The median ridge of the prostomium rises posteriorly and expands into a rounded elevation on which the eyes are borne. There are two pairs of eyes with slight pigmentation on one side indicating a possible intermediate eye. The posterior eyes are smaller and much nearer to each other than the anteriors. (See PI. Ill, fig. 1). Parapodia all of the usual well-developed biramous type. Both notopodium and neuropodium throughout have well-developed postsetal lamellae which in general are low, vertically elongate and evenly rounded. The neuropodial lamella at the posterior end becomes relatively longer, more cirriform. The dorsal lamella is fused at the base with the branchia. It remains at the same general form over most of the body but at the posterior end becomes gradually increased in length and finally much elongate and branchiform. The branchiae are present on all parapodia excepting the last two pairs. The first branchiae are short, the following ones increasing in length and soon attaining the maximum when they ordinarily extend more or less obviously beyond the middorsal line and are proportionately heavy. At the posterior end the branchiae become reduced and in the last few pairs are much exceeded in length and thickness by the dorsal lamella which in the meantime has become cirriform and some- times a little clavate. The last branchiae occur on the third pair of parapodia from the last and are merely slight tubercles. (See PL III, fig. 3). Only capillary setae are present in the first sixteen or seventeen pairs of parapodia. Those of the posterior series are broad, bilimbate setae with fine, often curving tips. The anterior setae are finer. The superior dorsals are of the finer capillary type. On the seventeenth parapodia crochets make their appearance in the neuropodial fascicle, at first one and two in number, and then increasing to nine, which seems to be the prevailing number. The crochets are of nearly uniform width over most of their length, the free portion moderately evenly curving. At the distal end of the shaft narrows to a rather slender neck above which it terminates in two teeth of which the apical is much smaller and acute. Distal end completely sheathed, the sheath widening distad and then rounded at the end. Shaft strongly fibrillate. (See PI. Ill, fig. 4). The caudal end of the body ends in four papillae of which the ventral are much stouter than the dorsals, reversing the condition, e.g., in S. mesnili (Euspio Mclntosh). (See PL III, fig. 2). LOCALITY. — Alaska: Collinson point. Station 27o. September 20, 1913. " Pelagic under 5 inches of ice over 1 foot of water. Lagoon at Collinson point." One specimen. This species resembles S. filicornis (O. F. Mtiller). It differs in the character of parapodia and branchiae in the posterior region, the great reduction of the branchiae and the elongate, cirriform or subcirriform character of the lamellae, etc. Contrasting conspicuously with the condition in filicornis, in which the branchiae remain long and the lamellae are not thus modified. The crochets first appear farther caudad than in filicornis, etc. Polychaeta 17 B Scolecolepides arctius, n. sp. Type specimen. — Cat. No. 36, Victoria Memorial Museum, Ottawa. Paratypes, Victoria Memorial Museum, No, 37; Mus. Comp. Zool., No.'s 2194 and 2195. Four specimens. The type is about 23 mm. long, with a width of 1-7 mm. It consists of about seventy-five setigerous segments. The body is flattened dorso-ventrally and is pointed at both ends. The prostomium is long, pointed behind and broad, and truncate in front. Posteriorly it reaches to the second setigerous somite. Four indistinct eye- spots are present in the same position as in benhami but with those of the anterior pair nearer to each other than the posteriors instead of the reverse. The appen- dages are attached at the anterolateral angles somewhat beneath, as in benhami; they are cylindrical and are proportionately much shorter than in the latter species. No tentacular cirri are present. (PL III, fig. 5). The parapodia are of the usual biramous type. Each notopodium and neuropodium has a prominent, flattened, postsetal lobe of which the notopodial is longer than the neuropodial. The postsetal lobe in the anterior region is vertically subelliptic with one edge attached (PI. Ill, fig. 6); but in the posterior region it becomes proportionately narrower vertically and at the same time higher (PI. Ill, fig. 7). The postsetal lobes decrease notably in size in the caudal region. Branchiae are present on somites beginning with the first setigerous. They are free from the notodial lobes excepting at their bases. Cylindrical and filiform. They are moclerately long in the anterior region though in no case equalling the width of the somite and behind the narrow pointed region scarcely surpassing the middorsal line. The branchiae remain of nearly uniform length and thickness until about somite XX when they begin to decrease in length and thickness and practically cease on somite XXIX, though represented in the form of nodules as rudiments at the bases of the postsetal processes. Pos- terior region wholly free from branchiae. The setae in both notopodia and neuropodia are in two series, an anterior and a posterior one, in addition to those of the inferior ventral group and superior dorsal group. In both branches of all paradodia occur fine capillary, apparently non-limbate setae in an anterior series, and broader, limbate setae in a posterior series. In going caudad a limited number, mostly three or four, hooded crochets replace setae of the posterior seties, first in the neuropodia and then in the noto- podia, the setae of the anterior series remaining unchanged. The setae of the inferior ventral group are bilimbate, distally pointed, the tips curving caudad and usual. The superior dorsal setae are much more elongate than the more ventral ones. In a typical neuropodium of the middle and posterior regions, at least, there is also a corresponding dorsal neuropodial group of more elongate capillary setae, though these were not detected in all cases. (See PI. Ill, fig. 7). The crochets are of the usual general form, distally narrowed and bidentate, and hooded. The hooded region colorless, more or less transparent; the «bafi in part strongly fibrillate. (See PL IV, fig. 1). Anus surrounded with numerous short papillae. LOCALITY. — Alaska: Collinson point. Station 27o. September 20, 1913. Mr. Johansen's field-note accompanying these specimens states that they were " Pelagic under 5 inches of ice over 1 foot of water in lagoon at Collinson poiDw Alaska: Lagoon at Collinson point. Station 27i. September 18, 1913. " Pelagic under 5 inches of ice over 4 feet of water." Two anterior fragments. This species, so far as appears from Ehlers' account of S. benhami1, is congeneric with the latter, the only other known Scolecolepides. The type ot S. benhami was taken by Prof. Benham at Moeraki, South New Zealand. Tbe !Abh. K. Ges. Wiss. Gottingen, Math.-phys Kl., n.s. 1907 5, no. 4 D. 14. 71927—2 18 B Canadian Arctic Expedition, 1913-18 present species is a less slender form than the genotype and consists of a much smaller number of somites, — seventy-five as against two hundred and six. The branchiae in benhami become much longer, at their maximum equalling the width of the segments; they continue to the eighty-sixth segment, instead of terminating near the twenty-ninth or earlier. In arctius the fine, elongate capillary setae of the superior group of notopodia, and in part, at least, of neuro- podia, seem to form a characteristic feature. A mis pin, n. gen. Prostomium without cornua, rounded anteriorly and prolonged caudad; without nuchal cirrus. In genotype one pair of eyes. Branchiae in genotype two pairs, on third and fourth somites, wholly free from the parapodial lamellae. Parapodia all free from each other, none of the neuropodia being connected by a membrane; no interparapodial pouches. Anterior parapodia bearing only capillary setae. Hooded crochets appearing in neuropodia caudad but notopodia remaining with only capillary setae. Crochets with beak bifid and lacking apical tooth. Genotype. A. boreus, n. sp. Close to Spionides but wholly lacking the characteristic lateral pouches of the latter and the nuchal cirrus. The crochets seem to be of distinctive form. Anaspio boreus, n. sp. Type specimen. — Cat. No. 38, Victoria Memorial Museum, Ottawa. One specimen. The type is incomplete caudally, at present embracing the head and thirty- six setigerous somites. It is only 12 mm. long. Body depressed, moderately convex above, more flattened beneath, covered in part anteriorly by the foliaceous developments of the parapodia. The prostomium is elongate, narrowly subtriangular with base cephalad. Anterior end weakly convex. Posteriorly it is prolonged to or nearly to the third setigerous segment in a thick palpoidal process fused with the dorsum throughout. Just in front of the beginning of this posterior region is one pair of eyes; these are small and wide apart. Vague pigment specks may represent a second pair of eyes farther forward and farther apart. (PL IV, fig. 2). The peristomium forms the lower lip and the usual lateral cephalic lobes, the latter broadly rounded posteriorly and narrowing cephalad. Tentacular cirri lost. (PL IV, fig. 2). The parapodia are prominent and conspicuous, particularly anteriorly. They are broadly attached, with two lobes almost continuous. Presetal lobes low, but the postsetal lamellae large and foliaceous. The postsetal lamella of notopodia I of moderate size, rising above in a triangular tip. The corresponding lamellae of the second, third, and fourth parapodia are much longer, being longer all along the setigerous line with the dorsomesal ends much more prolonged; those of the third parapodia largest, overlapping above the dorsum. The notopodial lamellae of the fifth and sixth parapodia are abrunptly smaller and more widely separated, though still large and pointed above. The fol- lowing ones rapidly lose their dorsal prolongations, becoming lower and evenly rounded, their dorsomesal edges in the first few extended mesad and conspicu- ously connected across dorsum in a low ridge or integumental fold, this fold becoming less marked posteriorly. Posteriorly the postsetal lamellae both of notopodia and of neuropodia become low and inconspicuous. The postsetal lamellae of the anterior neuropodia vertically much shorter than those of the notopodia, but high, decreasing in size in correspondence with the reduction of the dorsal lamellae. There are only two pairs of branchiae, these occurring on the third and fourth setigerous segments. They are thick, subconical processes free from Polychaeta 19 B the notopodial lamellae above the tips of which they do not rise and by which they are largely concealed. As usual, only capillary setae are found in both branches of the anterior parapodia. In both notopodia and neuropodia they are very numerous and are arranged in the usual two series. Crochets first appear on or near the eleventh parapodia, one or two in each, increasing in number caudad. The ordinary capillary setae are characterized by being densely and coarsely punc- tate, the punctae in part elongate or in form of short lines. The crochets are hooded, the membranous shields somewhat clavately widening distad and extending completely over the head. The head is large and extends at right angles to the axis of the adjacent part of the shaft; it lacks an apical denticle and the process is cleft somewhat like the beak of a bird. (See PL IV, fig. 4.) Locality. — Unfortunately the locality label with the type, after its separa- tion, was displaced. There seems little doubt, however, that it was from Collinson point, Alaska, probably from Station 27o. LARVAL SPIONID A. Two larvae of this form were secured in plankton among the more numerous phyllodocid larvae (Paranaitis sp.). These are Nerine-like forms. The prosto- mium is anteriorly pointed, the point less prolonged and less acute than in corresponding stages of Nerine cirratulus. Two pairs of eyes are present. Palpi well-developed, thick. In one specimen twenty setigerous segments are present. The development of the parapodial lamellae has progressed considerably, the postsetal notopodial lamellae on the anterior segments showing already a distal elongation. Capillary setae alone are present on the first thirteen pairs of para- podia. On the fourteenth hooded crochets appear in the neuropodia and con- tinue to the last, the maximum number attained being three. (See pi. IV, fig. 6.) No crochets were detected in any qf the notopodia. Length 1.5mm. The general form and structure of the specimen is shown in PI. IV, fig. 5. The second specimen is of nearly the same length, but is proportionately more slender and presents twenty-four or twenty-five setigerous segments. It is otherwise similar in general form and structure to the other specimen. LOCALITY. — Alaska: Grantley harbour. Station 20a. July 30, 1913. Surface. LARVAL SPIONID B. With the field notes made by the marine zoologist of the expedition (Mr. Johansen) are two sketches of larvae which are obviously spionids. Specimens of these forms, however, were not in the material submitted for study, so that various desirable details cannot be ascertained with reference to them. (a) The first sketch represents a spionid, noted as less than 1 mm. in length, in which both anterior and preanal ciliary rings are present. There are fourteen setigerous segments. The palpi are subconical, distally rounded organs and project caudoectad. Across the anterior end of the prostomium are shown eight eyes, of which three on each side form a triangular group. The prostomium is anteriorly slightly indented, not at all pointed. LOCALITY. — Dolphin and Union strait (off Bernard harbour). Station 40c. June 7, 1915. Pelagic. Ice 6 feet, over 9 feet of water. (6) The second sketch is of an apparently older larva about 2 mm. long. It is similar in general appearance to the preceding. Nineteen setigerous somites are represented. Both anterior and preanal ciliary bands represented as still present. Prostomium and palpi similar to those of (a). Only four eyes, two of each outer group of the preceding form being absent. The sketch also represents the eyes as farther caudad than in the other form, being shown, in fact, as just behind the ciliary band instead of in front of it. LOCALITY. — Alaska: off Martin point. Station 32c. July 30, 1914. 71927—2^ 20 B , Canadian Arctic Expedition, 1913-18 CIRRATULIDAE. Cirratulus cirratus (O. F. Muller). 1776. Lumbricus cirratus 0. F. MULLER. Zool. Danica Prodr., p. 214. 1825. Cirratulus fuscescens JOHNSTON, Edinb. Philos. Journ., 13, p. 219. — . Cirratulus flavescens JOHNSTON, ibid., p. 219. 1828. Cirratulus borealis BLAINVILLE, Diet. Sci. Nat., 57 p. 490. 1833. Cirratulus medusae JOHNSTON, Mag. Nat. Hist., 6, p. 124, fig. 13. 1844. Cirratulus medusa W. THOMPSON, Ann. Nat. Hist., 13, p. 437. 1857. Cirratulus cirratus KOREN, Nyt. Mag. f. Naturvid., II, p. 94. 1858. Cirratulus borealis GRUBE, Mem. Sav. Etrang. St. Petersb., 8, p. 15. The one small specimen of Cirratulus in the collection is apparently this species. It is a small specimen measuring not more than 15 mm. in length. It lacks all branchiae at present; but the scars show a group of seven special branchiae on each side of the first setigerous segment to have been present. The eye bands are conspicuous and of the typical form. The specimen at present is dark brown. This is a widely distributed species known from Scandinavia, Finmark, Greenland, Labrador, Siberia, and Bering sea, and from southward in the Atlantic to the coasts of the United States and Great Britain. LOCALITY. — Northwest Territories: Bernard harbour, outer part. Station 41. July 20, 1915. Depth, 3-5 fathoms. Bottom, sandy mud with algse. OPHELIIDAE. Travisia forbesii Johnston. 1840. Travisia Forbesii JOHNSTON, Ann. Nat. Hist., 4, p. 373, pi. II, f. 11-18. 1843. Ammotrypane oestroides H. RATHKE, Nova Acta Acad. Leop. Car. 20, p. 192, pi. 10, f. 9-19. 1843. Ophelia mammilata OERSTED, Annul. Dorsibr., p. 53, pi. 8, f. 103, 112, 114, 119-120. A form ranging from Great Britain northward to Scandinavia, Spitzbergen, Iceland, and Greenland, and from there southward to New England. Locality. — Northwest Territories: Bathurst inlet, Banks peninsula. May 18, 1916. Station 486. Numerous specimens taken from the stomachs of two female individuals of tomcod, Microgadus proximus Gill, respectively 14 and 15.5 inches in length, collected by R. M. Anderson. ARENICOLIDAE. Arenicola marina (Linne*). 1758. Lumbricus marinus LINNE, Syst. Nat., ed. 10, I, p. 648. 1775. Lumbricus littoralis OLAFSEN and PO^VELSEN, Reise durch Island, 2 p. 478, pi. 5, f. 8. 1780. Lumbricus papillosus FABRICIUS, Fauna Greenland., p. 279. 1788. Nereis lumbricoides PALLAS, Nova Acta Acad. Petrop., 2, p. 233, pi. 5, f. 8. 1801. Arenicola piscatorum LAMARCK, Syst. Anim. sans Vert., p. 324. 1802. Arenicola carbonaria Bosc., Hist. Nat. Vers, I, p. 161, pi. 6, f. 3. 1816. Arenicola tinctoria LEACH, Encycl. Brit., Suppl. to ed. 4-6, I, p. 452. 1817. Arenicola clavata RANZANI, Opusc. Sc., 2, p. 110, pi. 4. 1854. Arenicola natalis GiRARd, Proc. Bost. Soc. Nat. Hist., 5, p. 88. Polychaeta 21 B 1863. Clymenides sulphured CLAPAREDE, Beobacht. Anat. Wirb., p. 30, pi. 15, fig. 24-27. 1884. Arenicola glacialis MURDOCH, Proc. U.S. Nat. Mus., 7, p. 522. This, the common lugworm, is primarily a north Atlantic and Arctic form occurring at Spitzbergen, Kara sea, about Iceland and Greenland, and south- ward on the North American coast to New England and on the European to Great Britain and Portugal. It also occurs rather rarely in the Mediterranean. A specimen collected by Middendorf in eastern Siberia and identified by Grube (1851) as A. piscatorum, is with little doubt the present species, which seems thus to have a circumpolar distribution. It is supplanted in the north Pacific by A. pusilla Quatrefages. It is somewhat doubtfully recorded from Chile, the Marquesas, etc., in the southern Pacific. LOCALITY. — Northwest Territories: Bernard harbour. Station 49/i. June 17, 1916. A single specimen of the species was taken from the stomach of an 8 • 75 inches long sculpin, Cottus sp., caught in about 2 fathoms of water. FLABELLIGERIDAE. Flabelligera affinis (Sars). 1829. Flabelligera affinis SARS, Bidrag til Soedyr. Nat., I, p. 31, pi. 3, f. 16. 1839. Chloroema Edwardsii DUJARDIN, Ann. Sci. Nat., ser. 2, II, p. 288, pi. 7, f. 1-5. 1840. Siphonostomum papillosum GRUBE, Actin. Echin. u. Wtirm., p. 68. 1841. Siphonostoma diplochaitos DELLE CHIAJE, Descriz., 3, p. 77, pi. 99, f. 8. 1843. Siphonostomum vaginiferum H. RATHKE, Nova Acta Acad. Leop.-Carol., 20, p. 211, pi. 11, f. 3-10. — . Siphonostoma Dujardini QUATREFAGES, Ann. Sci. Nat., ser. 3, 12, p. 282, pi. 9, f. 1-9. 1849. Chloroema sordidum QUATREFAGES, Ann. Sci. Nat., ser. 3, 12, p. 285, pi. 9, f. 10. 1853. Siphonostoma gelatinosa DALYELL, Pow. Great., 2, p. 256, pi. 18, f. 10-12. — . Tecturella flaccida STIMPSON, Inverteb. Grand Manan, p. 32, 3, f. 21. 1865. Siphonostoma uncinata JOHNSTON, Cat. AnneL Brit. Mus., p. 223 and 344. 1867. Flabelligera affinis MALMGREN, Annul. Polychset., p. 83. 1873. Chloroemum pellucidum SARS, Nyt Mag. f. Naturvid., 19, p. 252. Many large specimens of this species were secured. It is a form common on the shores of Greenland and is known to occur as well at Iceland, Spitzbergen, Scandinavia, Finmark and Bering sea, and southward along the coasts of North America to the northern shores of the United States and along the Euro- pean shore to Ireland. LOCALITIES. — Northwest Territories : Bernard harbour, Station 41, July 20, 1915. Depth, about 10 meters. Ten specimens taken on a sandy bottom among Lammaria. Northwest Territories : Bernard harbour. Station 42e. September 3, 1915. Several specimens taken from the stomach of a large female bearded seal, Erignathus barbatus (Erxleben). Northwest Territories : Dolphin and Union strait : Cockburn point. Station 37o. October 3, 1914. Many specimens were taken at this station from the stomach of a male Erignathus barbatus (Erxleben), 73 inches long. Northwest Territories : Bernard harbour, outer part. Station 4 1/. August 1, 1915. Depth, about 5 meters. Bottom, sandy mud with stones and brown algse. One small specimen (18 mm. long.) A colored sketch of this specimen made in the field by Mr. Johansen shows that in life the colors were essentially typical, the green branchiae, etc., being prominent. 22 B Canadian Arctic Expedition, 1913-18 Brada villosa (Rathke). 1843. Siphonostoma villosum H. RATHKE, Nova Acta Acad. Leop.-Car., 20, p. 215, pi. 11, f. ii and 12. 1858. Siphonostomum villosum GRUBE, Mem. sav. e*trang. St. Petersb., 8, p. 16. 1865. Pherusa villosa QUATREFAGES, Annel., I, p. 483. 1867. Brada villosa MALMGREN, Annul. Polychset., p. 84. 1882. Trophonia arctica HANSEN, Norw. North Atlantic Exped., Annel., p. 39, pi. 7, f. 17-20. LOCALITY. — Northwest Territories: Bernard harbour, outer part. Station 41. July 20, 1915. Two specimens from a depth of 3-5 fathoms on bottom of sandy mud with algae. MALDANIDAE. Paraxiothea catenata (Malmgren). 1865. Axiothea catenata MALMGREN, Ofvers. Svensk. Vet. Akad. Forh., p. 190. 1893. Clymene catenata LEVINSEN, Vid. Meddel. nat. Foren. Kjobenh., p. 143. 1900. Clymenella (Axiothella) catenata VERRILL, Trans. Conn. Acad. Arts and Sci., 10. p. 657. 1907. Axiothella catenata ARVIDSSON, Zool. Jahrb. Suppl., 9. p. 209, pi. 5, f. 166-170, pi. 9, f. 308-311. This is essentially a purely arctic species, the more southern records, as those about Scotland, being apparently due to misidentification. It has a circumpolar distribution, having been previously recorded from White sea, Spitzbergen, Greenland, Siberia, and Bering strait. In the material of the present collection is a fragment consisting of the anterior ten segments. It is 57 mm. long, with a maximum diameter of 4-5 mm. LOCALITY. — Ungava: Port Burwell. Neptune Expedition, 1903. TEREBELLIDAE. Amphitrite cirrata Miiller. 1776. Amphitrite cirrata O. F. MULLER, Zool. Danica Prodr., n. 2617. 1788. Terebella cirrata GMELIN, Linn. Syst. Nat., I. 1803. Sabella cirrata MONTAGU, Test. Brit., p. 550. One specimen of this species is in the collection. A species widespread in boreal and arctic regions of the Atlantic ocean and its branches* and ranging to the Mediterranean. It is common about Iceland and along the shores of Greenland from where it extends southward along the North American coast. Wiren doubtfully refers a specimen from the Bering strait to this species. LOCALITY. — Ungava: Port Burwell. Neptune Expedition, 1903-4. A. Halkett, collector. Nicolea venustula (Montagu). 1818. Terebella venustula MONTAGU, - Trans. Linn. Soc. London, 12, p. 344, pi. 13, f. 2. 1844. Terebella zostericola OERSTED, De Reg. Marin., p. 68. 1849. Terebella parvula LEUCKART, Archiv Naturg., 15, pt. I, p. 177. 1865. Nicolea arctica MALMGREN, Ofvers. af K. Vet. Akad. Forh., p. 381, pi. 24, f. 66-66D, 67-67C. LOCALITY. — Northwest Territories: Bernard harbour, outer part. Station 41. July 20, 1915. Depth, 10 meters. Bottom, sandy mud with Laminaria. One broken specimen. Polychaeta 23 B Well known from the Arctic and North Atlantic, and occurring as far south as the Mediterranean sea. On the American side it has been previously recorded from Greenland and Davis strait, Labrador, New England, and Bering sea. Thelepus cincinnatus (Fabricius). 1780. Amphitrite cincinnatus FABRICIUS, Fauna Groenl., p. 286. 1817. Terebella cincinnata SAVIGNY, Syst. Annel. 1818. Sabella conchilega MONTAGU, Trans. Linn. Soc. Lond. 12. 1826. Terebella lutea Risso, Hist. Nat. Eur. Merid., 4. 1847. Terebella mandida, FREY and LEUCKART, Beitr. Wirb. Thiere, p. 154. 1849. Thelepus Bergmanni LEUCKART, Archiv. Naturg., 15, pt. I, p. 169. 1853. Lumara flava STIMPSON, Marine Inverteb. Grand Manan, p. 30. 1860. Terebella pustulosa GRUBE, Archiv. Naturg., 26, pt. 1, p. 100. 1865. Thelepus circinnatus MALMGREN, Ofvers. vet. Akad. Forh., p. 381, pi. 22, f. 58. — . Venusia punctata JOHNSTON, Cat. Annel. Brit. Mus. — . Heterophyselia cincinnata QUATREFAGES, Hist. Annel., 2, p. 387. — . Phenacia terebelloides QUATREFAGES, op. cit., p. 375. — . Phenacia pulchella PARFITT. 1869. Phenacia ambigrada CLAPAREDE, Annel. Golfe Naples, p. 402, pi. 18, f . 6. — . Phenacia retrigrada CLAPEREDE, ibid., p. 403, pi. 18, f. 7. 1871. Thelepodopsis flava SARS, Vidensk. Selsk. Forh. 1902. Thelepus antarcticus WILLEY, Polychaet. Voyage of Southern Cross. LOCALITY. — Hudson strait Ungava: King George's . sound. September 9, 1897. Diana Expedition. Low and Wakeham. One specimen in poor con- dition, with tube. A species of exceedingly wide distribution, occurring in the Antarctic as well as the Arctic region, where it is abundant, and also found in both the Atlantic and Pacific oceans, probably more or less continuously between the two polar regions. Terebellides stroemi Sars. 1835. Terebellides Stroemi SARS, Beskriv. og lakttag., p. 48, pi. 13, f. 31a-d. 1846. Corephorus elegans GRUBE, Archiv. Naturg., 12, 1. 1853. Terebella pecten DALVELL, Pow. Great., 2, p. 208, pi. 26, f. 9. 1874. Terebellides gracilis MALMGREN, Goteborg. K. Vetensk. och Vitterh. Handl., ny tidsf., 14. LOCALITIES.— North of Alaska: Station 23 (latitude 70° 24' N., longitude 161° 25' W). August 19, 1913. Depth 9 to 10 fathoms. Gray mud with pebbles; no algae. Alaska: Collinson point. Station %7s. October 3, 1913. Depth, 3 fathoms. Bottom, mud with pebbles. Two specimens which seem fully to conform to this species. It is a wide- spread and commonly abundant species in Arctic and northern waters, and extends southward in the Atlantic to the Mediterranean on the eastern and to southern New England on the western coast and in the Pacific to Japan. AMPHARETIDAE. Samytha sexcirrata (Sars). 1856. Sabellides sexcirrata SARS, Fauna litt. Norvegiae, 2, p. 23. 1865. Samytha sexcirrata MALMGREN, Ofvers. k. vet. Akad. Forh., p. 370, pi. 20, f. 49-49D. LOCALITY.— North of Alaska. Station 23. (Latitude 70° 24' N., longitude 161°25/W.) August 19, 1913. Depth 9 to 10 fathoms Gray mud with pebbles; no algae. 24 B Canadian Arctic Expedition, 1913-18 One specimen of typical structure. Scars show the normal three pairs of branchiae to have been present in two separated groups; but only one branchia remains in place on the specimen at present. This is a primarily Arctic species of probably circumpolar distribution. It was previously known from the waters of Sweden, Spitzbergen, Greenland, Davis strait, Labrador, and New England. Ampharete johanseni, n. sp. Type specimen. — Cat. No. 39, Victoria Memorial Museum, Ottawa. Paratype, Mus. Comp. Zool., No. 2193. Two specimens. This species seems generally to be readily recognizable from the character- istics of the branchiae. The branchiae of the two groups are only very narrowly separated at the middle line and the two mesal ones are connected at base by a rather high membrane. The first, second, and fourth branchiae on each side counting from the most ectal, are in a transverse line and are of the same general size; but the third is crowded often a little caudad of the others and is charac- teristically much smaller in size, though varying considerably in the amount of its reduction. The palese number typically from nine to twelve on each side. Slenderly attenuated to a fine tip, but the latter not at all abruptly set off. (See PL V, fig. 1.) There are thirteen setigerous thoracic somites. The setae narrowly limbate and finely tipped as usual. The uncini have only four teeth in each series, the plate as a whole subquadrate, with the abdental edge evenly curved, not shoul- dered or angulate. (See pi. V, fig. 2.) First abdominal uncinigerous tori large, with edges rounded, the others progressively reduced in going caudad. No cirri were detected on any of them. The type is 16 mm. long. A second specimen, which is incomplete caudally, is considerably broader. LOCALITY. — Alaska: off Collinson point. Station 27s. October 3, 1913. Depth, 3 fathoms. Bottom, mud and gravel, with algae. The tubes are composed of grains of sand adhering to a tough lining mem- brane. Ampharete reducta, n. sp. Type specimen. — Cat. No. 40, Victoria Memorial Museum, Ottawa. Paratype, Muis. Comp. Zool., No. 2192. Two specimens. A species somewhat suggesting A . arctica in the form of the paleae ; but the tips are much more elongate and less abruptly set off, not shortly mucronate. (See PL V, fig. 3.) Also the paleae are only half or less as numerous as in arctica, the number in each ^roup being five or six. The paleae are obviously coarser than in johanseni. The branchiae have the ordinary general arrangement, but with the ectal one of each group caudad of the general line, in the type being almost caudad of the adjacent one. The usual fourteen pairs of fascaiae of capillary thoracic setae. These setae limbate and finely tipped, as shown in PL V, fig. 5. The uncini are of the same general type as in johanseni; but they are smaller and there are five teeth in each series in place of four and the end away from which the teeth are directed is less rounded, being slightly indented as in arctica but without so distinct an angle or shoulder as in the latter. (See pi. V, fig. 4.) Length, 20 mm. LOCALITY. — Alaska: off Collinson point. Station 27s. October 3, 1913. Depth, 3 fathoms. Bottom, mud and gravel with algae. Found with specimens of johanseni. The tubes of the two species are alike in structure and appearance. Polychaeta 25 B Ampharete eupalea, n. sp. Type specimen. — Cat. No. 31, Victoria Memorial Museum, Ottawa. One specimen. The branchiae are large and equal. They form a continuous straight line across the dorsum, the two mesal ones in contact, leaving no indication of an hiatus between the two groups. The paleae on each side are arranged in a strongly curved series forming about two-thirds of the circumference of a circle. In the type they number twenty-two or twenty-three in each series. The paleae at the mesal end of the series on the dorsal side of the curve are much reduced in size. Each palea is acutely pointed distally, the tip not truly mucronate, though with a slight tendency toward that condition. The tip is curved gently toward the centre of the circle limited by the series. (See PL V, fig. 6.) The thoracic notopodial setae narrowly limbate and finely tipped as usual. The uncini of the type are obviously larger than those of the two preceding species. There are five teeth in each series, plate slightly indented at the end, the corners rounded. (See PL V, fig. 7.) The type is incomplete, embracing only the anterior region of the thorax ten setigerous somites being present. The diameter is 3 mm. LOCALITY.— North of Alaska. Station 23. (Latitude 70° 24' N., longitude, 161°25/W.) August 19, 1913. Depth, 9-10 fathoms. Bottom, mud with pebbles, no alga?. One specimen. AMPHIGTENIDAE. Cistenides granulata (Linne"). 1767. Sabella granulata LINNE, Syst. Nat., ed. 12, I, p. 1268. 1780. Amphitrite auricoma FABRICIUS, Fauna Groenlandica, p. 289. 1843. Amphitrite escrichti RATHKE, Nova Acta Acad. Leop.-Car., 20, p. 219. 1851. Pectinaria groenlandica GRUBE, Fam. AnneL, p. 82, 138. A species of circumpolar distribution. LOCALITIES. — Northwest Territories: Bernard harbour, outer part. Station 41. July 20, 1915. Depth, about 10 meters. Bottom, sandy mud with Lam- inaria. Two specimens with tubes. Northwest Territories : Bernard harbour, outer part. Station 4 Ic. July 28, 1915. Depth, 3-8 fathoms. Bottom, mud with algae. Northwest Territories: Bernard harbour. Station 49. June 27, 1916. A broken tube from the stomach of a Pacific eider, Somateria v-nigra Gray. Northwest Territories: Dolphin and Union strait, west of Cockburn point. Station 43c. September 14, 1915. Depth, 20-30 meters. Bottom, gray mud with stones, Laminaria, Lithothamnion, etc. Many of the characteristic tubes, all empty. Hudson bay: Cape Fullerton, "shore of island." Neptune Expedition, September 25-29, 1903. Several tubes with animals in situ and preserved dry. Alaska: Port Clarence. Station 20gr. August 4, 1913. Depth, 2-3 fathoms. Bottom, sandy mud with algae. A number of specimens in their tubes. Alaska: Grantley harbour. Station 20 b, c. July 30, 1913. Bottom, sandy mud with algae. A number of tubes with little doubt pertaining to this species. They are darker and rather more opaque than usual. CAPITELLIDAE. Capitella capitata (Fabricius). 1780. Lumbricus capitatus FABRICIUS, Fauna Groenlandica, p. 279. 1827. Lumbricus litoralis JOHNSTON, Zool. Journ., 3, p. 328. 1828. Capitella Fabricii BLAINVILLE, Diet. Sci. Nat., 57, p. 443. 26 B Canadian Arctic Expedition, 1913-18 1842. Lumbriconais marina OERSTED, Kroyer's Naturh. Tidsskr., 4, p. 132, pi. 3, f. 6, 11-12. 1849. Lumbriconais capitata LEUCKART, Aufr. Naturg., 15, p. 163. 1857. Capitella capitata VAN BENEDEN, Bull. Acad. Roy. Belg., ser. 2, 3, p. 137, w. two plates. 1865. Valla ciliata JOHNSTON, Cat. Worms. Brit. Mus., p. 68. 1881. Capitella prototypa capitata CZERNIAWSKY, Bull. Moscou Soc. Nat., 56, p. 340. — . Capitella intermedia CZERNIAWSKY, ibid., p. 342. — . Capitella similis CZERNIAWSKY, ibid., p. 46. An extremely widespread species. Aside from occurring in the Arctic and northern waters, as about Greenland, Iceland, Spitzbergen, and Scandinavia, it extends southward in the Atlantic along both the North American and Euro- pean coasts, and is found as well in the Mediterranean sea, Black sea, and other European waters, Madeiras, straits of Magellan, Kerguelen, and the Antarctic region generally. LOCALITIES. — Northwest Territories: Bernard harbour. Station 41. July 20, 1915. One specimen taken at a depth of 3-5 fathoms on a bottom of sandy mud among algae. Northwest Territories: Bernard harbour: inner harbour. Station 37e. Sep- tember 1, 1914. Several broken specimens taken at 2 fathoms on a sandy bottom among algae. SABELLIDAE. Chone ungavana, n. sp. Type specimen. — Cat. No. 53, Victoria Memorial Museum, Ottawa. One specimen. Total length, inclusive of branchiae, about 42 mm. Length of branchiae, 10 mm. Diameter, 1.6 mm. Branchiae, nine pairs. Their bases not concealed by the collar. All broad, united by a membrane to within about one mm. of the tips. The free tips broad, foliaceous, acuminate, with barbs absent from a terminal region of a little more than one-half mm. length. Collar simple, on each side folded into the dorsal sinus, with small mesal fold subacute. Ventrally the collar not at all incised at the median line, but on the contrary, there slightly produced in a very obtuse angle. Eight setigerous and one non-setigerous somite in the thorax and about forty-eight somites in the abdomen. The body is in general cylindrical, but is pointed at the caudal end. The thoracic and the anterior and median somites of the abdomen are biannulate. The foecal groove is deeper and more distinct in the caudal region of the abdomen in the usual way. The thoracic notopodial setae are delicate and colorless and are of two general types. The superior ones are acute tapering capillary setae which are narrowly limbate and finely tipped. The inferior setae are much shorter and are of a subspatulate form, with one edge much straighter than the other; they are finely mucronate, the mucron long, asymmetrically situated at the angle adjacent to the straighter side. (See PI. VI, fig. 1). The thoracic neuro- podials are crochets with long manubria distally curving back, thus elevating the beak of the head. Head with beak large and nearly at right angles to adjacent part of the principal axis, the crest pectinate in the usual way. (See PI. 6, fig. 2). The tori of the abdomen have uncini with beaks long and less divergent than in most other species, the sinus enclosed between the beak and body of uncinus narrower at its opening than at bottom. (See PI. VI, fig. 3, 4). LOCALITY. — Ungava: Hudson strait: King George's sound. September, 1897. Depth, 40 fathoms. Diana Expedition. Low and Wakeham. One specimen. Polychaeta 27 B This species suggests C. duneri Malmgren in the form of the abdominal uncini; but the beak is proportionately longer and less divergent and the body of the uncinus much narrower below, more uniform. The spatulate thoracic setae are somewhat similarly asymmetrical but the mucron is much more diver- gent from the axis as shown in the figure. The species seems conspicuously different from duneri in the characters of the branchiae, which are united much farther distad, with the free apical region proportionately much broader, widely winged, and the tip free from barbs much shorter. In this respect the form approaches the Alaskan C. gradlis Moore, though the free tips of the branchise in the latter are also longer. In gradlis the collar is notched ventrally, whereas in the present species it is there weakly angulate. The spatulate setae of gradlis are symmetrical, or nearly so, instead of strongly asymmetrical. The beak of the crochets is more elevated, making a greater angle with the axis. And the abdominal uncini are different, the beak being more divergent and the body proportionately wider and more strongly curved. Moore (1898) has recorded as Chone sp. a caudal fragment from Egg harbour, Labrador, which is quite possibly the present species. At least it would seem to have uncini very similar to those of ungavana. Euchone analis (Kroyer). 1856. Sabella analis KROYER, Danske Vid. Selsk. Forh., p. 17. 1865. Euchone analis MALMGREN, Ofvers. af Vet. Akad. Forh., p. 466, pi. 28, f. 88-88G. LOCALITY. — Northwest Territories: Bernard harbour, outer part. Station 41c. July 28, 1915. Depth, about 3 fathoms. Bottom, gray mud with Laminaria, etc. Many tubes, in part with animals in situ. " Had dark cress- bands on the otherwise pale tentades" (Johansen's field-notes). A common arctic form of circumpolar distribution, being known from Bering sea, Davis strait, Greenland, Spitzbergen, etc. SERPULIDAE. Serpula vermicularis Linne. 1767. Serpula vermicularis LINNE, Syst. Nat., ed. 12, p. 1266. 1863. Serpula Philippi MORCH, Naturh, Tidsskr., ser. 3, 54, p. 381. 1838. Serpula fasdcularis LAMARCK, Hist. Nat. An. s. Vert., ed. 2, 5, p. 618. 1817. Serpula contortuplicata SAVIGNY (nee Linne), Syst. Annel., p. 73. 1864. Serpula Jukesii BAIRD, Journ. Linn. Soc., 8, p. 20. — . Serpula zelandica BAIRD, ibid., p. 21. 1865. Serpula antarctica QUATREFAGES, Hist. Nat. Annel., 2, p. 503. 1884. Serpula granulosa MARENZELLER, Denks. Akad. Wiss. Wien., p. 19, pi. 4, f. 1. 1885. Serpula vasifera HASWELL, Proc. Linn. Soc. N.S. Wales, 9. p. 688, pi. 31, f. 1, pi. 32, f. 6-8. 1901. Serpula columbiana JOHNSON, Proc. Bost. Soc. Nat. Hist., 19, p. 432, pi. 19, f. 199-204. 1902. Serpula narconensis COLLIN, Semon's Foischungsreise in Austral, u. dem Malayenarchipel. Polychaet., p. 100. LOCALITIES. — British Columbia: Departure bay, 1909-10. W. Spread- borough, collector. A large cluster of tubes. British Columbia: Savary island beach. May 22, 1914. W. Taylor, collector. A cluster of tubes. British Columbia: Port Simpson. Beach. Winter, 1914-15 C. M. Barbeau, collector. Parts of two tubes probablv this species. On them are 28 B Canadian Arctic Expedition, 1913-18 the tubes of Circeis spirillum. The tubes of both the Serpula and the Circeis are in part tinged with green. A species of circumboreal distribution extending as well in both the Atlantic and Pacific oceans to corresponding southern latitudes, as straits of Magellan, New Zealand, Australia, etc. It is common on the Pacific coast of North America from Alaska to California. Spirorbis spirorbis (Linne*). 1758. Serpula spirorbis LINNE, Syst. Nat., ed. 10, p. 787. 1800. Spirorbis borealis DAUDIN, Recueil, p. 38. 1801. Spirorbis nautiloides LAMARCK, Syst. Anim. s. Vert., p. 326. 1863. Spirorbis borealis MORCH, Naturh. Tidsskr., p. 429. 1897. Spirorbis (Lceospira) borealis CAULLERY and MESNIL, Bull. Scientif., p. 211, f. 18, a-e. LOCALITIES. — Northwest Territories: Bernard harbour, outer part. Station 41/. August 1, 1915. Depth about 5 meters. Bottom, mud with stones and algae. One of the tubes is largely derolled, the others of the flat, sinistral spiral form. Northwest Territories: Young point. Station 50d. July 21, 1916. Rock bottom. Two tubes on algae. Northwest Territories: Dolphin and Union strait: off Cockburn point. Station 43a. Bottom, gray mud with pebbles; no algae. 100 meters. Nova Scotia: Halifax. February, 1917. Beach. F. Johansen, collector. Numerous tubes on Fucus. Circeis spirillum (Linne). 1758. Serpula spirillum LINNE, Syst. Nat., ed. 10, p. 785. 1803. Serpula lucida MONTAGU, Test. Brit., p. 507. 1825. Heterodisca lucida FLEMG, Edinb. Journ., 15, p. 247. 1863. Spirorbis spirillum MORCH, Naturh. Tidsskr., ser. 3, 1, p. 438. 1894. Circeis armoricana ST. JOSEPH, Ann. Sc. Nat., 17, p. 350, pi. 12, f. 387. 1897. Spirorbis (Dexiospira) spirillum CAULLERY and MESNIL, Bull. Sci., p. 198, f. 4, a-b. 1919. Circeis spirillum CHAMBERLIN, Mem. Mus. Comp. Zool., 48, p. 478. LOCALITIES. — Northwest Territories: Dolphin and Union strait: west of Cockburn point. Station 43c. September 14, 1915. Depth, 50-60 meters- Bottom, sandy mud with stones and algae. Many tubes with animals in situ on Laminaria and Delessaria. Alaska: Orca (Cordova). Station 60a. September 5, 1916. Tubes on sea-weed. Beach. Northwest Territories: Bernard harbour, outer part. Station 41c. July 28, 1915. Depth, about 10 meters. Bottom, gray mud with Laminaria, Delessaria, etc. Tubes on Desmarestia. Northwest Territories: Young point. Station 50d. July 21, 1916. Depth, 0-1 fathom. Bottom, rock. Two tubes on algae. Ungava: Port Burwell. Neptune Expedition. A. Halkett, collector. Numerous tubes on sea- weed dredged July 28, 1904. A common and widespread species in Arctic and temperate regions both in the Atlantic and Pacific. It occurs frequently on kelp (Laminaria, etc.), hydroids, etc. The specimens from Station 43c on Laminaria have the shell in the typical flat dextral spiral form. Those from station 41c are some of the same form and a few in part derolled or of the ascending form (lucidus-type) . 30s Canadian Arctic Expedition, 1913-18 Fig 1. 2. " 3. " 4. Arctonoe lia, n. sp. Arctonoe lia, n. sp. Arctonoe lia, n. sp. Arctonoe lia, n. sp. PLATE I. Anterior end, dorsal view. Second parapodium. First left elytron. Sixth right elytron (eleventh segment) , Polychaeta 31 PLATE I. 32 B Canadian Arctic Expedition, 1913-18 Fig. 1. " 2. Arctonoe ha, n. sp. Arctonoe lia, n. sp. Arctonoe lia, n. sp. middle of series. Nepthys hudsonica, n. sp. Nepthys hudsonica, n. sp. Nepthys hudsonica, n. sp. parapodium. x PLATE II. Notopodial seta, first parapodium. Neuropodial seta, middle of series, first parapodium. Coarser neuropodial, parapodium from middle region of body, Anterior region, dorsal view. Thirty-third parapodium, anterior view. Notocirrus and branchial appendage of the thirty-third Polychaeia 2 PLATE II. 71927-3 Canadian Arctic Expedition, Fig. Spio mimus, n. sp. Spio mimus, n. sp. Spio mimus, n. sp. Spio mimus, n. sp. Scolecolepides arctius, n. sp. Scolecolepides arctius, n. sp. Scolecolepides arctius, n. sp. PLATE III. Anterior end, dorsal view. Caudal end, dorsal view. Thirteenth parapodium, caudal view. Crochet from twenty-seventh setigerous somite. Anterior end, dorsal view. Twenty-third parapodium, anterior view Twenty-fourth parapodium from caudal end, anterior Polychaeta 35 B PLATE III. 71927—4 36 B Canadian Arctic Expedition, 1913-18 PLATE IV. Fig. 1. Scolecolepides arctius, n. sp. Crochet from twenty-third parapodium from caudal end. 2. Anaspio boreus, n. sp. Anterior end, dorsal view. (Setae of third parapodia not represented.) 3. Anaspio boreus, n. sp. Tenth right parapodium, anterior view. 4. Anaspio boreus, n. sp. Distal portion of crochet from neuropodium of thirty-fifth parapodium. " 5. Spionid larva A, dorsal view. " 6. Spionid larva A. Crochet. 38 B Canadian Arctic Expedition, 1913-18 PLATE V. Fig. 1. Ampharete johanseni, n. sp. Palea. ' 2. Ampharete johanseni, n. sp. Uncinus. 3. Ampharete reducta, n. sp. Distal portion of palea. 4. Ampharete reducta, n. sp. 5. Ampharete reducta, n. sp. 6. Ampharete eupalea, n. sp. 7. Ampharete eupalea, n. sp. Uncinus. Notopodial seta, thirteenth setigerous segment. Three palese from dorsal part of series. Uncinus. Polychaeta 39s PLATE V. 40 B Canadian Arctic Expedition, 191 3-1 S Fig. 1. 2. " 3. " 4. Chone ungavana, n. sp. Chone ungavana, n. sp. Chone ungavana, n. sp. Chone ungavana, n. sp. PLATE VI. Inferior spatulate thoracic seta from somite V. Thoracic uncinus or crochet. Abdominal uncinus. A second uncinus from same torus nearer end of series. Polychaeta 41 B PLATE VI. Report of the Canadian Arctic Expedition, 1913-18. Volume I: General Introduction, Narrative, Etc. Part A: Northern Party, 1913-18. Part B: Southern Party, 1913-16. By Rudolph Martin Anderson. (In preparation). Volume II: Mammals and Birds. Part A: Mammals. By Rudolph Martin Anderson. (In preparation). Part B: Birds. By R. M. Anderson and P. A. Taverner. (In preparation). Volume III: Insects. Introduction. By C. Gordon Hewitt. (In press). Part A: Collembola. By Justus W. Folsom. (Issued). Part B : Neuroptero id Insects. By Nathan Banks. (Issued). i Part C: Diptera. By Chas. W. Alexander, Harrison G. Dyar, and J. R. Malloch. (Issued). Part D: Mallophaga and Anoplura. By A. W. Baker, G. F. Ferris, and G. H. F. Nuttall. (Issued). Part E: Coleoptera. By J. M. Swaine, H. C. Fall, C. W. Leng, and J. D. Sherman, jr. (Issued). Part F: Hemiptera. By E. P. Van Duzee. (Issued). Part G: Hymenoptera and Plant Galls. By Alex. D. MacGillivray, Charles T. Brues, F. W. L. Sladen, and E. Porter Felt. (Issued). Part H: Spiders, Mites, and Myriapods. By J. H. Emerton, Nathan Banks, and Ralph V. Chamberlin. (Issued). Part I: Lepidoptera. By Arthur Gibson. (Issued). Part J: Orthoptera. By E. M. Walker. (Issued). Part K: General Observations on Insect Life in the Arctic. By Frits Johansen. (In preparation). Volume IV: Botany. Part A: Freshwater Algae and Freshwater Diatoms. By Charles W. Lowe. (In preparation). Part B: Marine Algae. By F. Collins. (In preparation). Part C: Fungi. By John Dearness. (In preparation), Part D: Lichens. By K. L. Merrill. (In preparation), Part E: Mosses. By R. S. Williams. (In press). Volume V: Botany. Part A: Flowering Plants and Ferns. By James M. Macoun and Theo. Holm. (In preparation). PartB: General Notes on Arctic Vegetation. By Frits Johansen. (In preparation). Volume VI: Fishes, Tunicates, Etc. Part A: Fishes. By F. Johansen. (In preparation). Part B: Ascidians, etc. By A. G. Huntsman. (In preparation). Volume VII: Crustacea. Part A: Decapod Crustaceans. By Mary J. Rathbun. (Issued). Part B: Schizopod Crustaceans. By Waldo L. Schmitt. (Issued). Part C: Cumacea. By W. T. Caiman. "(In press). Part D: Isopoda. By Miss P. L. Boone. (In press). Part E: Amphipoda. By Clarence R. Shoemaker. (Issued), Part F: Pycnogonida. Leon J. Cole. (In press). Part G: Euphyllopoda. By F. Johansen. (In preparation). Part H: Cladocera. By Chancey Juday. (Issued). Part I: Ostracoda. By R. W. Sharpe. (In preparation). Part J: Freshwater Gopepoda. By C. D wight Marsh. (Issued). Part K: Marine Copepoda. By A. Willey. (Issued). Part L: Parasitic Copepoda. By Chas. B. Wilson. (Issued). Part M: Cirripedia. By H. A. Pilsbry. (In preparation). Volume VIII: Mollusks, Echinoderms, Coelenterates, Etc. Part A: Mollusks, Recent and Pleistocene. By Wm. H. Dall. (Issued). Part B: Cephalopoda and Pteroppda. By S. S. Berry and W. F. Clapp. (In preparation). Part C: Echinoderms. By Austin H. Clark. (Issued). Part D: Bryozoa. By R. C. Osburn. (In preparation). Part E: Rotatoria. By H. K. Harring. (In preparation). Part F: Chaetognatha. By A. G. Huntsman. (In preparation). Part G: Actinozoa and Alcyonaria. By A. E. Verrill. (In press). Part H: Medusae and Ctenophora. By H. B. Bigelow. (Issued). Part I: Hvdroids. By McLean Fraser. (In preparation). Part J: Porifera. Volume IX: Annelids, Parasitic Worms, Protozoans, Etc. Part A: Oligochaeta. By Frank Smith and Paul S. Welch. (Issued) . PartB: Poly chaeta. By Ralph V. Chamberlin. (In press). Part C: Hirudinea. By J. P. Moore. (In press). Part D: Gephyrea. By Ralph V. Chamberlin. (Issued). Part E: Acanthocephala. By H. J. Van Cleave. (Issued). Part F: Nematoda. By N. A. Cobb. (In preparation). Part G-H: Trematoda and Cestoda. By A. R. Cooper. (In pr Part I: Turbellaria. By A. Hassell. (In preparation). Part J: Gordiacea. Part K: Sporozoa. By J. W. Mavor. (In preparation). Part M: Foraminifera. By J. A. Cushman. (Issued). Volume X: Plankton, Hydrography, Tides, Etc. Part A: Plankton. By Albert Mann. (In preparation). PartB: Marine Diatoms. By L. W. Bailey. (In preparation). Part C: Tidal Observations and Results. By W. Bell Dawson. (Issued). Part D: Hydrography. (In preparation).