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. 



