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) . 



