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 (Linné). 
1758. Serpula spirorbis Linn, Syst. Nat., ed. 10, p. 787. 
1800. Spirorbis borealis Daupin, Recueil, p. 38. 
1801. Spirorbis nautiloides Lamarck, Syst. Anim. s. Vert., p. 326. 
1863. Spirorbis borealis Méncu, Naturh. Tidsskr., p. 429. 
1897. Spirorbis (Leospira) borealis CauLtERY and Meswit, Bull. Scientif., 
p. 211, f. 18, a-e. 
Locauitizs.—Northwest Territories: Bernard harbour, outer part. Station 
4if. August 1, 1915. Depth about 5 meters. Bottom, mud with stones and 
alge. 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 alge. 
Northwest Territories: Dolphin and Union strait: off Cockburn point. 
Station 43a. Bottom, gray mud with pebbles; no alge. 100 meters. 
Nova Scotia: Halifax. February, 1917. Beach. F. Johansen, collector. 
Numerous tubes on Fucus. 
Circeis spirillum (Linne). 
1758. Serpula spirillum Linn, Syst. Nat., ed. 10, p. 785. 
1803. Serpula lucida Montaau, Test. Brit., p. 507. 
1825. Heterodisca lucida FLteme, Edinb. Journ., 15, p. 247. 
1863. Spirorbis spirillum Moércu, Naturh. Tidsskr., ser. 3, 1, p. 438. 
1894. Ctrceis armoricana Sv. Josepu, Ann. Sc. Nat., 17, p. 350, pl. 12, f. 387. 
1897. Spirorbis (Dexiospira) spirillum CauLLERY and Mesniu, Bull. Sci., 
p. 198, f. 4, a-b. 
1919. Circeis spirillum CHAMBERLIN, Mem. Mus. Comp. Zool., 48, p. 478. 
Locatit1es.—Northwest Territories: Dolphin and Union strait: west of 
Cockburn point. Station 48c. September 14, 1915. Depth, 50-60 meters. 
Bottom, sandy mud with stones and algew. Many tubes with animals in situ 
on Laminaria and Delessaria. 
Alaska: Orea (Cordova). Station 60a. September 5, 1916. Tubes on 
sea-weed. Beach. 
Northwest Territories: Bernard harbour, outer part. Station 41lc. 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 alge. 
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). 
