188 BIOLOGICAL SURVEY OF 



A. STRIATA (Leach). {Nicania striata Leach, 1819, Ross's 

 Voyage; A. banskii Gould, 1870, Inv. Mass., p. 125, fig. 438.) 

 We did not take this species. Blaney reports only valves. 

 Reported from Massachusetts Bay northward, 10 to 25 

 fathoms (Dall). Off Halifax, Gaspe Bay, Labrador and 

 Greenland coasts. 



Carditidae 

 Venericardia Lamarck 



V. (Cyclocardia) borealis (Conrad). {Cardita horealis 

 Conrad, 1832, x4.mer. Marine Conch.; Cardita horealis Gould, 

 1870, Inv. Mass., p. 146, fig. 455; V. (Cyclocardia) horealis 

 Dall, 1902, Proc. Nat. Acad. Sci. Phila.) A very common 

 species on hard or shelly bottoms. The epidermis, which is 

 greenish yellow in the young, gradually turns brown unless 

 in water which says free of sediment. As the animal gets 

 older the shell changes greatly in shape. From the young, 

 where the beaks are nearly central, a little elevated, and just 

 a bit recurved, they gradually become more elevated and 

 oblique. Stations : D 5, 14, 23, 27, 36, 38, 45, 46, 51, 53, 54, 

 62-66, 68, 72, 83, 84, 89, 94, 97, 99, 100, 103, 106, 107, 112, 119, 

 125, 126, 144. Reported from Eastport to off New London. 

 Generally distributed along Atlantic coast to Hudson Strait ; 

 a Pleistocene fossil. 



V. (Cyclocardia) novangliae (Morse). (Actinoholus (Cy- 

 clocardia novangliae Morse, 1869, Peabody Acad Sci. ; Cyclo- 

 cardia novangliae Verrill, 1873, Inv. Vineyard Sound, p. 684, 

 pi. 29, fig. 215.) Occurs on hard bottoms with the preceding 

 and may be distinguished from it by the hinge margins and by 

 the finer sculpture. Growth of shell like F. horealis. Not 

 recorded for Woods Hole, but reported "mouth of Vineyard 

 Sound and off Gay Head, 10 to 25 fathoms."— Verrill; East- 

 port, Casco Bay, off New London. According to Verrill, this 

 form appears to be only an inconstant variety of F. horealis 

 and has a range co-extensive with the latter. From my ex- 

 perience, I agree. 



