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. 



