THE MOUNT DESERT REGION 



187 



off Heron Island. Mighels reported "stomach of haddock 

 . . . . taken in Casco Bay." "var. Portlandia occurs .... 

 Bay of Fundy, 10 to 25 fathoms, not common." (Verrill.) 



A. CASTANEA (Say). {Venus castanea Say, 1822, Jour. Acad. 

 Nat. Sci. Phila. ; A. castanea Gould, 1870, Inv. Mass., p. 117, 

 fig. 431.) We dredged this species but 4 times and then but 

 a few specimens were taken. The stations, however, were 

 widely apart, indicating such a distribution. Stations : D 27, 

 89, 100, 107. Reported from Casco Bay, Massachusetts Bay, 

 Nantucket, Marthas Vineyard, Chatham, off New London. 

 ''Does not seem to range farther northward than the Bay of 

 Fundy and Atlantic coast of Nova Scotia. ' ' ( Whiteaves. ) 



A. suBAEQuiLATEEA Sowerby. (Sowerby, 1855, Thes. Conch.; 

 A. crehricostata Gould, 1870, Inv. Mass., p. 126, fig. 440.) 

 Not so widely distributed as A. undata, but common except 

 on soft bottoms. Stations : D 9, 19, 26, 35, 73, 94, 95, 101, 

 105, 106. Reported from Eastport, Penobscot Bay, Casco 

 Bay, off Nauset Light. An interesting reference is in Whit- 

 eaves Cat. Marine Inv. of Eastern Canada, p. 132. 



A. BOREALis (Schumacher). (Tridonta borealis Schu- 

 macher, 1817, Essai. Nouv. Syst. Hab. Test.; A. semisulcata 

 Gould, 1870, Inv. Mass., p. 121, fig. 433; ^. borealis Dall, 1903, 

 Proc. U. S. Nat. Mus., vol. 26, p. 941.) Blaney reports dredg- 

 ing valves of this species, but although we had stations in 

 the same territory, we did not take it. According to the litera- 

 ture, it is a most variable form. Reported from Massachu- 

 setts Bay. Although this is supposed to be a northern species, 

 Whiteaves makes no mention of it. After going over thou- 

 sands of Astarte forms and aware of their variations, I 

 would doubt its being a valid species. 



A. QTJADRANS Gould. (Gould, 1870, Inv. Mass., p. 123, fig. 

 434.) This small but distinctly quadrilateral species we took 

 in but two dredgings and only three individuals. Stations: 

 D 68 and 69, just outside of Egg Rock on hard Bottom. Re- 

 ported from Casco Bay, Massachusetts Bay, Provincetown, 

 Marthas Vineyard, Georges Bank, Stonington, Bay of Fundy 

 (not common), north shore of St. Lawrence off Esquimaux 

 Point. 



