the Shells of Maine. 319 



spect from Massachusetts specimens. It differs considerably 

 from the preceding species in its liabits, seeming to prefer wet 

 places rather than the open water. I have found it in the 

 greatest profusion in the crevices, and under the bark of de- 

 caying timber, floating in ponds. 



C. calycuhita 1 Drap. That this is, in reality, identical 

 with C. calyculata of Europe, I cannot positively aver, — 

 this much, however, it will be safe to say, so far as the shells 

 are concerned, they are perfectly alike. I have found it plenty 

 in running brooks, under stones. 



C minor, Adams and Migh. I have found this delicate 

 little species abundant in a spring, within the limits of this 

 city. In its habit of burrowing, it differs from other species 

 with which I am acquainted. It is often found six inches un- 

 der ground, under stone.«, one or two feet from the water. 

 I have received specimens from Monmouth, (forty or fifty 

 miles from Portland.) It is also abundant in Vermont. 



C. nitida, Migh. This is, doubtless, a rare species, as I 

 have never detected it but at one locality, (Norway, Oxford 

 county,) where I obtained about half a dozen specimens. It 

 was in company with C. partumeia. 



Genus Astarte. Sow. 



A. undn(a, Gould. Pelagic. Immature specimens are fre- 

 quently obtained from the stomachs of haddock taken far out 

 at sea, in very deep water, in Casco Bay. I have obtained 

 many fine mature specimens of it by dredging in Portland 

 harbor, where the water is from four to six fathoms in depth, 

 and the mud very deep and soft. 



Not doubting that this is distinct from all the known species 

 of Europe, I have not hesitated to adopt the name proposed 

 for it by Dr. Gould, (Invert. Mass. p. 80.) 



A. castanco, Say. Pelagic. Rare, but occasionally found 

 on some of our sandy beaches, after heavy easterly storms. 



A. quadrnns, Gould. Pelagic. This is found sparingly in 

 fishes' stomachs, taken in very deep water in Casco Bay. I 

 have found several specimens considerably larger than that 



