392 REPORT OF COMMISSIONER OF FISH AND FISHERIES. [686] 
Fossil (@. lunulata) in the Post-Pliocene of North and South Carolina; ° 
in the Pliocene of South Carolina; and in the Miocene of Maryland and 
Virginia. The fossil shell is probably identical with the recent one, but 
I have not had suitable specimens of the former for comparison; if 
identical, the species should be called G. lunulata. 
LUCcINA FILOSA Stimpson. Plate XXIX, fig. 212. (p. 509.) 
Shells of New England, p. 17, 1851; Gould, Invert., ed. ii, p. 98, fig. 404. Lu- 
cina radula Gould, Invert., ed. i, p. 69 (non Montagu, sp.). ? Lucina contracta, 
Say, Jour. Acad. Nat. Sciences, Philad., vol. iv, p. 145, Plate 10, fig. 8; Conrad, 
Fossils of the Medial Tertiary of U. S., p. 40, Plate 20, fig. 5, 1840. 
Stonington, Connecticut, to Maine. Off Block Island, 29 fathoms, sandy 
mud; off Gay Head, 19 fathoms, soft mud; Casco Bay and Portland 
Harbor. Stonington (Linsley). Boston Harbor (Stimpson). Phillip’s 
Beach (Holder). Rhode Island (Conrad, as L. contracta). 
Fossil in the Post-Pliocene of Gardiner’s Island (8S. Smith). LZ. con- 
tracta occurs in the Miocene of Virginia; it was formerly regarded by 
Conrad as identical with the recent shell from Rhode Island, but is 
probably a distinct, though closely-allied species. Mr. Jeffreys identi- 
fied this species with DZ. borealis (Linné) of Europe; the latter is also 
found on the Pacific coast at Vancouver Island and Catalina Island 
(Cooper and P. P. Carpenter). 
CYCLAS DENTATA. Plate X XIX, fig. 211. (p. 418.) 
Lucina dentata Wood, General Conchology, p. 195, Plate 46, fig. 7,1815 ; Gould, 
Invert., ed. ii, p. 99, fig. 45. Lucina divaricata Gould, Invert., ed. i, p. 70, (non 
Linné, sp). Lucina strigilla Stimpson, Shells of New England, p. 17, 1851. 
Brazil and West Indies to Cape Cod. Not uncommon, dead, but rarely 
obtained living, in Vineyard Sound, 6 to14 fathoms. Coney Island (S. 
Smith). Nantucket (Gould). St. George’s Bank (8. I. Smith). Fort Ma- 
con, North Carolina, abundant, (Coues, Yarrow). Georgia (Couper). 
Fossil in the Post-Pliocene of North Carolina, South Carolina, and 
Florida; and in the Pliocene of South Carolina. The same, or a closely- 
related species, (L. Conradi D’Oxb., Prod., iii, p. 117, 2194, t. Conrad, in 
Proc. Acad. Nat. Sci., Phil., 1862, p. 577=L. divaricata Conrad, Fossils 
of Med. Tert., p. 38, Plate 20, fig. 3) occurs in the Miocene of Virginia. 
CRYPTODON GOULDIT Adams. Plate X XIX, fig. 213. (p. 509.) 
H. and A. Adams, Genera, vol. ii, p. 470, 1858; Gould, Invert., ed. ii, p. 100, fig. 
406. Lucina Gouldii Philippi, Zeitsch. f. Malak., 1845, p. 74-(t. Gould). 
Thyasira Gouldii Stimpson, Shells of New Eng., p. 17, 1851. Lucina flexuosa 
Gould, Invert., ed. i, p. 71, fig. 52 (non Montagu, sp.). 
Stonington, Connecticut, to Gulf of Saint Lawrence. Off Block 
Island, 29 fathoms; Buzzard’s Bay, 6 fathoms, mud; common in Mas- 
sachusetts Bay, Casco Bay, and Bay of Fundy, 5 to 60 fathoms, muddy 
and sandy. Nova Scotia (Willis). Gaspé, Canada (Whiteaves). Mur- 
ray Bay (Dawson). Gulf of Saint Lawrence, 20 to 300 fathoms (White- 
