688 REPORT OF COMMISSIONER OF FISH AND FISHERIES. 



The American specimens of this shell differ so widely in form, and 

 especially in the structure of the hinge, from all the European speci- 

 mens with which I have compared them, as well as from the descrip- 

 tions and figures, that I cannot regard them as identical. Dr. Gould has 

 well defined the form and external characters of our shell. I have seen 

 no European specimens so elongated in form as the American examples 

 seen by me invariably are, but depend less on the. external form than on 

 the structure of the hinge for distinguishing them. (See the greatly en- 

 larged figure in the Amer. Journal of Science). r 



Having had opportunities to study northern specimens of this shell, 

 since I gave it the name niUda, I have become fully satisfied that the 

 original shell described by Fabricius is identical with the American 

 species, rather than with the European. His description corresponds 

 well with "our best specimens. The European species, if, as I believe, 

 distinct from ours, should, therefore, retain the name T. purpurea (Mon- 

 tagu, sp. ); and minuta should be restored to the American form. 



Kellia planulata Stimpson. Plate XXX, fig. 226. (p. 310.) 



Shells of New England, p. 17, 1851 ; Gould, Invert., ed. ii, p. 83, fig, 393. Kellia 

 rubra Gould, Invert., ed. i, p. 60, (uon Montagu, sp.). 



Long Island Sound to Greenland. Near New Haven, Connecticut, rare ; 

 Vineyard Sound and Buzzard's Bay, 1 to 8 fathoms, not common ; Casco 

 Bay 5 Eastport, Maine, 8 to 15 fathoms ; Bay of Eundy. Montauk and 

 Greenport, Long Island, low-water to 6 fathoms, mud j and Gull Island, 

 low-water, under stones, (S. Smith). Boston Harbor, 5 fathoms, shelly, 

 (Stimpson). Sable Island, Nova Scotia (Willis). Greenland (Morch). 



MONTACTJTA ELEVATA StimpSOU. (p. 418.) 



Shells of New England, p. 16, 1851 ; Gould, Invert., ed. ii. p. 86, fig. 396. Mon- 

 tacuta bidenlata Gould, Invert., ed. i, p. 59, 1841 {non Montagu, sp., 1803). 



Long Island Sound to Massachusetts Bay. Savin Bock, near New 

 Haven, rare; Naushon Island, Vineyard Sound, rare. Greenport, Long 

 Island (S, Smith). New Bedford (Gould). Chelsea Beach (Stimpson). 



Lepton paeagella Conrad. 



Marine Couchology, p. 53, Plate 11, fig. 3,1831; Dekay, Nat. History of New 

 York, Mollusca, p! 243, Plate 32, fig. 307, A, B. 



Ehode Island (Conrad). 



I have not seen specimens of this shell. It seems to be rare and little 

 known. 



A closely-related species (L. mactroides Conrad, Fossils Medial Tert., 

 p. 19, Plate X, fig. 5, 1839) is found in the Miocene of Maryland. 



Solenomya velum Say. Plate XXIX, fig. 210. (p. 3G0.) 



Journal Acad. Nat. Sciences, Philad., vol. ii, p. 317, 1822 (Sol<iny«y, Gould, Invert., 

 ed. i, p. 35 : ed. ii, p. 48, fig. 371. 



North Carolina to Nova Scotia. Great Egg Harbor, New Jersey ; Long 

 Island Sound, near New Haven, low-water to G fathoms, not uncommon 



