[695] INVERTEBRATE ANIMALS OF VINEYARD souND, ETc. 401 
yard and Buzzard’s Bay, 20 to 25 fathoms, rare; Casco Bay, 15 to 95 
fathoms, not common; Bay of Fundy, 10 to 100 fathoms, frequent. 
Saint George’s Bank (S. I. Smith, A. S. Packard). Gardiner’s Bay, 5 
fathoms, one specimen, (S. Smith). Off New London, Connecticut (T. 
M. Prudden). Gulf of Saint Lawrence (Whiteaves). Murray Bay 
(Dawson). NovaScotia (Willis). Labrador (Packard). Arctic Ocean, 
near Behring’s Straits, 30 fathoms, (Stimpson, N. P. Expl. Exp., 
t. Gould). 
Fossil in the Post-Pliocene of Canada (Dawson). 
CRENELLA GLANDULA Adams. Plate XXXI, fig. 233. (p. 418.) 
H. and A. Adams, Genera, vol. ii, p. 515, 1858; Gould, Invert., ed. ii, p. 194, fig. 
492. Modiola glandula Totten, American Journal Science, ser, i, vol. xxvi, 
p. 367, figs. 3, e, f, g, 1834; Gould, Invert., ed. i, p. 131, fig. 87 (pars). Mytilus 
decussatus Stimpson, Shells of New England, p. 11,1851, (non Montagu, sp.) ; 
Dekay, op. cit., p. 186, Plate 22, fig. 248. 
Connecticut to Gulf of Saint Lawrence. Buzzard’s Bay and Vineyard 
Sound, 5 to 15 fathoms, not uncommon; off Gay Head, 19 fathoms, soft 
mud; off Block Island, 29 fathoms, sandy mud; common in Massa- 
chusetts Bay, Casco Bay, and Bay of Fundy, 3 to 60 fathoms. Halifax 
(Willis). Gulf of Saint Lawrence, at Gaspé (Whiteaves). Gardiner’s 
Bay, Long Island (S. Smith). Stonington (Linsley). Off New London, 
Connecticut (T. M. Prudden). Sandy Hook, New Jersey (Fergu- 
son). Fossil in the Post-Pliocene at Montreal, Canada (Dawson). A 
related species, C. equilaterata Conrad (H.C. Lea, sp.) occurs in the 
Miocene of Virginia. 
This species was undoubtedly confounded with C. decussata (Montagu, 
sp.) by both Gould and Stimpson. The genuine decussata is quite com- 
mon in Casco Bay, Bay of Fundy, and Gulf of Saint Lawrence, and is 
usually associated in those waters with C. glandula. It is a northern, 
and common European species, and is also recorded from the North 
Pacific coast of America by Dr. P. P. Carpenter. It also occurs in 
Greenland (Morch). 
MONOMYARIA, 
PECTEN IRRADIANS Lamarck. Plate XXXII, fig. 238. (p. 374.) 
Anim. sans Vert., ed. i,1819; ed. ii, vol. vii, p. 143; Gould, Invert., ed. ii, p. 199, 
fig. 496. Pecten concentricus Say, Journ. Acad. Nat. Sci., Philad., vol. ii, p. 
259, 1822; Gould, Invert., ed.i, p. 134, fig. 88; Dekay, op. cit., p. 172, Plate 9, 
fig. 205. : 
Florida and the northern shores of the Gulf of Mexico to Cape Cad ; 
rare and local farther north in Massachusetts Bay; and Nova Scotia 
(Willis). Very common in Vineyard Sound, Buzzard’s Bay, shores of 
Long Island and Connecticut, New Jersey, and southward. Tampa 
Bay, Florida (Conrad, E. Jewett). Texas (Roemer). 
Fossil in the Post-Pliocene of North Carolina and Tampa Bay, 
Florida; in the Pliocene of South Carolina; and in the Miocene of 
