402 REPORT OF COMMISSIONER OF FISH AND FISHERIES. [696] 
Maryland. Dug up from beneath the mud in the harbor of Portland, 
Maine, in a semi-fossil state by the mud-dredging machines (Fuller). 
Precren IsLANDICUS Chemnitz. 
Conch., vii, p. 304, Plate 65, figs. 615, 616, 1784, (t. Gould); Lamarck, op. cit., ed. 
ii, vol. vii, p.145; Gould, Invert., ed. i, p. 133, fig. 87; ed. ii, p. 198, fig. 495. 
Ostrea Islandica Miiller, Zod]. Dan. Prod., No. 2990, 1776; Fabricius, Fauna, 
Gronl., p. 415,1780. Pecten Pealii Conrad, Amer. Mar. Conch., p. 12, Plate 2, 
fig. 2, 1831. 
Arctic Ocean south to Cape Cod, local and rare farther south; on the 
northern European coasts, south to Bergen, Norway, and Great Britain. 
Not uncommon and of good size in Casco Bay, 20 to 70 fathoms ; com- 
mou in the Bay of Fundy, low-water to 100 fathoms. Saint George’s 
Bank, 40 to 65 fathoms, (S. I. Smith). More common farther north. 
Stonington, Connecticut, in an eel-pot, (Linsley). I am not aware that 
any one except Linsley has recorded it from the southern coast of New 
Tingland. . 
Fossil in the Post-Pliocene of Maine (abundant), New Brunswick, 
Canada, Labrador, Greenland, Scandinavia, Denmark, Scotland, ete. 
Naples (Jeffreys). Mr. Sanderson Smith reports fragments from Gard. 
iner’s Island. 
PECTEN TENUICOSTATUS Mighels. (p. 509.) 
Mighels and Adams, Proceedings Boston Soc. Nat. Hist., vol. i, p. 49, 1841; Boston 
Journal of Natural History, vol. iv, p. 41, Plate 4, fig. 7,1842 (young); Gould, 
Invert., ed. ii, p. 196, fig. 494. Pecten Magellanicus Lamarck, Anim. sans Vert., ed. 
li, vol. vii, p. 134 (? non Gmelin, sp.) ; Hanley, Recent Shells, p. 274; Gould, In- 
vert., ed. i, p.132. Pecten fuscus Linsley, Amer. Jour. Sci., ser.i, vol. xlviii, p. 
278, 1845; Gould, ser. ii, vol. vi, p. 235, fig. 6,1848 (young). Pecten brunneus 
Stimpson, Shells of New England, in errata, 1351. 
New Jersey to Labrador. Rare and local south of Cape Cod. Not 
uncommon in Massachusetts Bay and Casco Bay, 4 to 80 fathoms; 
abundant in Frenchman’s Bay, Mount Desert, Maine, in 3 to 10 fathoms; 
common in Passamaquoddy Bay and Bay of Fundy, 1 to 109 fathoms. 
Saint George’s Bank, 45 fathoms, (8S. I. Smith). Nova Scotia (Willis). 
Labrador, 2 to 15 fathoms, (Packard). Off Block Island (Gould). Ston- 
ington, Connecticut, in cod stomachs, (Linsley, as P. fuscus). Coney 
Jsland and Sandy Hook, New York (S. Smith). 
Fossil in the Post-Pliocene near Saint John, New Brunswick, and 
Guardiner’s Island, New York. A closely related species occurs in the 
Miocene of Virginia. 
ANOMIA GLABRA Verrill. Plate XXXII, figs. 241, 242, 242%. (p. 311) 
American Jour. Science, vol. iii, p. 213, 1872. Anomia ephippium (pars) Linné, 
Syst. Nat., ed. xii, p. 1150; Gould, Invert., ed. i, p. 138; ed. ii, p. 204, fig. 497. 
Anomia electrica Gould, Invert., ed. i, p. 140; ed. ii, p. 205, fig. 499, adult, (non 
Linné.) Anomia squamula Gould, Invert., ed. i, p. 140; ed. ii, p. 206, young, 
(non Linné.) 
Florida to Cape Cod; rare and local farther north, in Massachusetts 
Bay, Casco Bay, and on the southern coast of Nova Scotia, off Cape 
