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. 



