394 REPORT OF COMMISSIONER OF FISH AND FISHERIES. 



The American specimens of tbis 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 Anier. Journal of Science). 



Having had opportunities to study northern specimens of this shell, 

 since I gave it the name nitida, 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. pin-pur ea (Mon- 

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



KELLIA PLANULATA Stimpson. Plate XXX, fig. 220. (p. 310.) 



Shells of New England, p. 17, 1851 ; Gould, Invert., ed. ii, p. 83, lig, W3. Kdlia 

 rabra Gould, Invert., ed. i, p. GO, (non Montagu, sp.). 



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

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

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

 Greeuport, Long Island, low-water to C fathoms, mud j and Gull Island, 

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

 (Stimpson). Sable Island. Xova Scotia (Willis). Greenland (Morch). 



MONTACUTA ELEVATA Stimpson. (p. 418.) 



Shells of New England, p. 16, 1851 ; Gould, Invert., ed. ii. p. 86, fig. 39G. Mon- 

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



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

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

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



LEPTON FABAGELLA Conrad. 



Marine Conchologj r , p. 53, Plate 11, tig. 3,1831; Dekay, Nat. History of \c\v 

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



Khode 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. 360.) 



Journal Acad. Nat. Sciences, Philad., vol. ii,p. 317, 1822 (Sokmya); 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 6 fathoms, not uncommon ; 



