the Shells of Maine. 331 



Genus Hipponix ? Sowerby. 



H. (species wiknown.) . . . Pelagic. The first, 



and only good specimen of this curious little shell, which I 

 found, was in the spring of 1840. This I took from the 

 stomach of a haddock, caught in Casco Bay. 1 have subse- 

 quently obtained another specimen, but too imperfect for 

 description. I have but little doubt that they belong to the 

 same genus as Sowerby's Hipponix. 



Genus CALYPXRiCA. Lam. 



C. striata, Say. Pelagic. I have obtained several fine 

 specimens of this interesting species by dredging in Portland 

 harbor. I have always found them resting upon the valves of 

 the Astarte undata. Captain Walden has dredged a few speci- 

 mens near the Fox Islands. 



Genus Crepidula. Lam. 



C. (Patella,) fornicata, Lin. Pelagic. This species is 

 often thrown upon our shores by storms. Captain Walden 

 recently found it adhering to the lower valves of Pecten magel- 

 lanicus, which he dredged near the Fox Islands. 



C. plana, Say. I have never found but one individual of 

 this species in Casco Bay ; this had located itself within the 

 mouth of a dead Buccinum undatum. It is much thicker than 

 any one I have seen from Massachusetts. 



Genus Bulla. 



All the recent species of this genus, found in Maine, are 

 pelagic, and have all been taken from the stomachs of fishes. 



B. gouldii. Couth. Very rare. I have never found but 

 one well marked individual. 



B. dchilis, Gould. Plentiful. 



B. triticea. Couth. Found occasionally, but rare. 



B. lineolata. Couth. I have never found more than five or 

 six of this species. 



38* 



