186 BIOLOGICAL SURVEY OF 



'quahog' by its brown epidermis and the absence of any- 

 purple marking on the inside of the shell. The common size 

 dredged is from 1 to 1^ inches long, and on these the epidermis 

 is a beautiful fawn brown shade. Widely distributed in small 

 numbers, but occurs in great abundance at stations D 25-27. 

 A large specimen was taken at Sand Beach after a storm. 

 Stations : D 2, 25-28, 61-63, 65, 71, 113, 120, 125. Eeported 

 from Eastport to off Block Island at various places, Bay of 

 Fundy, Annapolis Basin. Although recorded by Fabricius 

 as a Greenland shell, this species has not yet been found in 

 the Gulf of St. Lawrence north of the Baie des Chaleurs 

 (Whiteaves, 1901). 



Astartidae 

 AsTARTE Sowerby 



A. UNDATA Gould. (Gould, 1841, Inv. Mass.; A. sulcata 

 Gould, 1870, Inv. Mass., p. 119, fig. 432.) This is the common 

 Astarte of this Region and is found in practically every 

 dredge haul and in sizes from the young an eighth of an inch 

 long and bright yellow, through the immature forms with 

 their concentric ridges and depressions and color from green- 

 ish yellow to brown, to the adult, about an inch long and 

 slightly higher with its dark-brown epidermis. Stations: 

 D 14, 25-28, 32, 36, 38, 51-54, 61-63, 65, 71, 72, 97, 98, 103, 

 105, 106, 112, 125, 126, 142-144. Common from Eastport to 

 Casco Bay, Minas Basin, Halifax Harbor, Northumberland 

 Strait. Not known to occur as far north as Miramichi Bay 

 (Whiteaves). 



A. TjNDATA LATisuLCA Haulcy. (Crassifia latisulca Hanley, 

 1843, Cat. Rec. Biv. Shells; A. undata latisulca Dall, 1903, 

 Proc. U. S. Nat. Mus., vol. 26, p. 938.) This variety is common 

 \di\i the preceding, and found on most of the same stations. 

 Reported from Eastport. Whiteaves says that this variety 

 occurs with A. undata in the Bay of Fundy and Minas Basin, 

 but not in Northumberland Strait. 



A. PORTLANDiCA Mighels. (Mighels, 1843, Boston Jour. Nat. 

 Hist., vol. 4, p. 320, pi. 16, fig. 2; Blaney, 1906, Nautilus.) 

 Blaney reports taking many valves and a few live specimens 



