190 BIOLOGICAL SURVEY OF 



Kelliellidae 



TuRTONiA Hanley 



T. MiNUTA (Fabricius). {Venus minuta Fabricius, 1780, 

 Fauna Groenlandica ; T. minuta Gould, 1870, Inv. Mass., p. 85, 

 fig-. 395. ) This very minute shell, averaging only one-fifteenth 

 of an inch in diameter, which is found everywhere in north 

 Atlantic waters, inhabits crevices in rocks, piles, and adheres 

 to floating objects and roots of sea weed. Common in the 

 crevices of dock piles. Reported from Sable Island common 

 (Willis) ; Greenland (Fabricius and Moller). 



Cardiidae 

 Cabdium Linne 



C. (Cerastodeema) ciliatum (Fabricius). (C. ciliatum 

 Fabricius, 1780, Fauna Groenlandica ; C. puhescens Couthouy, 

 1838, Boston Jour. Nat. Hist. ; C. islandicum Gould, 1870, Inv. 

 Mass., p. 139, fig. 450.) This one of the two species from 

 here is partial to hard bottoms, but found widely distributed, 

 and of all sizes, on other bottoms as well. Specimens nearly 

 2 inches in length were taken. Epidermis present on all 

 living individuals. Stations : D 23, 27, 33, 63, 126. Reported 

 from Eastport, Casco Bay, Marblehead Harbor, off Cape Cod. 

 Pleistocene of Portland, Me., and Canada. Common through- 

 out eastern Canad to Hudson Bay. 



C. (Cerastoderma) pinnulatum (Conrad). (C. pinnulatum 

 Conrad, 1831, Acad. Nat. Sci. Phila. ; C. pinnulatum Gould, 

 1870, Inv. Mass., p. 141, fig. 452.) This is the common form 

 of wide distribution and is found with C. ciliatum. Is small, 

 but readily distinguished from the young of that species by 

 having fewer ribs and the scales crossing them. Is generally 

 found in the stomachs of fishes. Common, especially north 

 of Cape Cod. Stations: D 5, 14, 27, 33, 34, 36, 38, 62, 71, 77, 

 94, 95, 105. Common eastern Canada, but Packard says does 

 not occur north of the Strait of Belle Isle. A Leda clay fossil. 



