394 REPORT OF COMMISSIONER OF FISH AND FISHERIES. [6&8] 
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 Ihave compared them, as well as from the deserip- 
tions and figures, that I cannot regard them asidentical. 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). ; 
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 7. 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. ellia 
rubra Gould, Invert., ed. i, p. 60, (ron 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; Eastport, Maine, 8 to 15 fathoms; Bay of Fundy. Montauk and 
Greenport, Long Island, low-water to 6 fathoms, mud; and Gull Island, 
low-water, under stones, (S. Smith). Boston Harbor, 5 fathoms, shelly, 
. (Stimpson). Sable Island, Nova Scotia (Willis). Greenland (Moreh). 
MoONYTACUTA ELEVATA Stimpson. (p. 418.) 
Shells of New England, p. 16, 1851 ; Gould, Invert., ed. ii. p. 86, fig. 395. Mon- 
tacuta bidentata Gould, Invert., ed. i, p. 59, 1841 (nor Montagu, sp., 1803). 
Long Island Sound to Massachusetts Bay. Savin Rock, near New 
Haven, rare; Naushon Island, Vineyard Sound, rare. Greenport, Long 
Island (S.Sminith). New Bedford (Gould), Chelsea Beach (Stimpson). 
LEPTON FABAGELLA Conrad. 
Marine Conchology, p. 53, Plate 11, fig. 3, 1831; Dekay, Nat. History of New 
York, Mollusca, p. 243, Plate 32, fig. 307, A, B. 
Rhode 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 (Solemya); 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 ; 
