394 REPORT OF COMMISSIONER OF FISIE AND FISHERIES. — [6°] 
The American specimens of this shell differ so widely in form, and 
especially in the structure of the hinge, from all the Buropean speci- 
mens with whieh Ihave compared them, as well ax from the descrip. 
tions and figures, that Leannot regard them as identical. Dr. Gould has 
well defined the form and external characters of our shell, J have seen 
no European speciinens so clongated in form as the American examples 
seen by me invariably are, but depend Jess on the external form thanon 
the structure of the hinge for distinguishing them. (See the greatly en- 
larged figure in the Amer, Journal of Science), 
Having had opportunities to study northern speciinens of this shell, 
since I gave it the name vitida, I have become fully satisfied that the 
original shell described by Fabricius is identical with the American 
species, rather than with the Muropean. His description corresponds 
well with our best specimens. The Wuropean species, if, as PF believe, 
distinct froin ours, should, therefore, retain the name 7. purpurea (Mon- 
tagu, sp.); and ainela should be restored to the American form, 
KELLIA PLANULATA Stimpson. Plate XXX, fig. 226. (p. 310.) 
Shells of New England, p. 17, 1451; Gould, Treat 4 ed. ti, po B38, fig, 305, Wellia 
rubra Gould, Invert., ed. i, p. 60, Coin Montagu, Kp.). 
Long Island Sound to Greenland. Near New Haven, Connecticut, rare; 
Vineyard Sound and Buzzard’s Bay, 1 to 8 fathoms, not common 3 Casco 
Bay ; Eastport, Maine, 4 to 15 fathoms; Bay of Fundy. Montauk aud 
Greenport, Long Island, low-water to 6 fathoms, mud ; and Gull Island, 
low-water, under stones, (S. Smith). Boston ILarbor, 5 fiuthoms, shelly, 
(Stimpson), Sable Island, Nova Scotia (Willis). Greenland (Méreh), 
MONTACUTA ELEVATA Stimpson. (p. 418.) 
Shells of New England, p. 16, 1451; Gould, Invert, ed. itp. 4G, fig, 396, Mon- 
tacuta bidentate Gould, Invert., ed, i, p. 59, 14 Cron Montagu, sp. 1603), 
Long Island Sound to Massachusetts Bay. Savin Rock, near New 
Haven, rare; Naushon Island, Vineyard Sound, rare. Greenport, Long 
Island (5. Smith) New Bedford (Gould), Chelsea Beach (Stimpson). 
LEPTON FABAGELLA Conrad. 
Marine Conchology, p. 53, Plate V1, fig. 3, 1831; Dekay, Nat. History of New 
York, Mollusca, p. 245, Vlate 32, fig. 307, A, 3. 
Rhode Island (Conrad). 
L have not seen specimens of this shell. It seems to be rare and little 
known. 
A closely-related species (4. 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, 1422 (Solemya); Gould, Invert, 
ed, i, p. U5: ed. ii, p. 44, 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 ; 
