168 



Family Capulidce. 



Capulacm^a radiata, M. Sars. 



Capulus radiatus, M. Sars (1849). 



Pilidium radiatum, M. Sars (1850). 



Filidium commodum, Middendorf (1851). 



CapulacMmi radiata, M. S.rs. 



Piliscus prohus, Loven (1859). 



Piliscus commodus, Verrill (1885). 



Capuhis {Capidacmaa) radinUi, Tryon (1886). 



OflFNova Scotia, in 150 fathoms, U. S. Fish Commission, SS. Albatross 

 dredgings of 1883 (Verrill). 



Rare in the Leda clay at Pointe Levis and Montreal. 



Orepidula fornicata (L.) 



Patella fornicata, L. (1767). 



Grepidida fornicata, Lamarck (1799) ; et auct. 



Abundant on oysters throughout the whole oyster region northward to 

 Caraquette Bay, also, on other shells, etc., in Northumberland Strait. 

 Verrill says that it has not been found in the Bay of Fundy, but G. T. 

 Kennedy has dredged it alive in Minas Basin. Atlantic coast of Nova Scotia, 

 common (Willis). Dead shells of this species were collected by Professor 

 Macoun iu 1S99 on the beach at Sable Island. 



A small specimen of it was found fossil in the Saxicava sand at the Mile 

 End, Montreal, by Baron de Geer in 1891 (Sir J. W. Dawson). 



Crepidula glauca, Say, which was included by Willis in his latest list of 

 Nova Scotian shells, was regarded by Dr. Stimpson as a synonym of C. 

 fornicata. 



Crepidula plana, Say. 



Crepidii'a unguiformis ? Lamarck (1822). 

 Crepidula plana, Say (1822) ; et auct. Am. 

 Crepidula unguiformis, Stimpson (1851). 



Found also throughout the oyster region ; off Sable Island, and in North- 

 umberland Strait, Le Have Bank, Nova Scotia, in 45 fathoms, gravelly 

 and sandy bottom, one alive ; U. S. Fish Commission, 1872 (Smith and 

 Harger). Frequently it occurs with C. Jornicata, on the outside of shells, 

 Limuli, &c." (Verrill). 



A difference of opinion exists as to whether the C. plana of Say is or is 

 not identical with C. unguiformis of Lamarck. In the U. S. Fish Commis- 

 sion Report for 1871-72, p. 650, Verrill says that the Mediterranean shell 

 C. unguiformis, Lamarck, is a distinct species. On the other hand, Stimp- 

 son, in 1851, identified New England shells with Lamarck's species. Tryon, 



