38 
S. I. Smith — Crustaceans of the Atlantic Coast. 
Cancer irroratus Say. 
Cancer irroratus ( $ only, ? being of the next species) Say, Journal Acad. Nat. Sci. 
Philadelphia, i, p. 59, pi. 4, fig. 2, 1817. — Stimpson, Annals Lyceum Nat. Hist. 
New York, vii, p. 50 (4), 1859. — A. Milne-Edwards, Nouvelles Archives du 
Museum d’Hist. nat. Paris, i. p. 191, 1865. — Yerrill, Invertebrate Animals of Vine- 
yard Sound, Report U. S. Commissioner of Fish and Fisheries, part i, p. 312 (18), 
1874. — Smith, in Verrill, op. cit., pp. 530 (236), 546 (252), 1874. 
Platycarcinus irroratus Milne-Edwards, Hist. nat. des Crust., i, p. 414, 1834. — 
DeKav, Nat. Hist, of New York. Crust., p. 6 (in part), pi. 2, fig. 2, 1844. 
Cancer Sayi Gould, Report on Invertebrata of Massachusetts, 1st edit., p. 323, 1841. 
Platycarcinus Sayi DeKay, op. cit., p. 7, 1844. — Gibbes, Proceedings Amer. Assoc. 
Adv. Sci., 3d meeting, p. 176 (12), 1850. 
Cancer borealis Packard. Memoirs Boston Soc. Nat. Hist., i, p. 303, 1867. 
South Carolina (Gibbes), apparently rare. Fort Macon, North 
Carolina ! (Cones, Yarrow). Great Egg Harbor!, New Jersey, 1871 ; 
apparently not very common in the muddy bays, but thrown up in 
large numbers upon the sandy outer beaches. Southern shore of 
Long Island!, 1870; on sandy beaches. Long Island Sound!; abund- 
ant on sandy and rocky shores. Equally abundant, in similar situa- 
tions, along all the rest of the south coast of New England, and in 
Cape Cod! (1872, 1875), Massachusetts! (1877, 1878), and Casco! 
(1873) Bays. Apparently much less abundant in the Bay of Fundy! 
(1864, 1868, 1870, 1872), and at Halifax !, Nova Scotia (1872, 1877). 
Gulf of St. Lawrence!, 1873; “the common crab of the Gulf” 
(Whiteaves). “Not uncommon at Caribou Island, Straits of Belle 
Isle,” south coast of Labrabor ! (A. S. Packard, Jr.). 
The exact bathymetrical range of the adult is not easily deter- 
mined, since full-grown specimens are seldom taken in the dredge. 
Specimens of considerable size were frequently taken in the trawl in 
Vineyard Sound, in from 6 to 12 fathoms, but I have never seen adult 
specimens from below the latter depth, although young individuals 
are often taken at much greater depths. Small specimens, from 
10 to 25 mm in breadth of carapax, were common in shallow-water 
dredgings in Vineyard Sound! and Buzzard’s Bay!, 1871, 1875, and 
were taken off Newport!, Rhode Island, in 29 fathoms, mud, 1871; 
in the region of St. George’s Banks !, 30 to 50 fathoms, sand, sand 
and shells, and coarse sand, 1872 ; on Stellwagen’s Bank!, 34 to 44 
fathoms, sand, 1873, — one specimen about 40 mm in breadth of cara- 
pax ; off Cape Ann!, Massachusetts, 26 fathoms, rocks, 1878; not 
rare on sandy and hard bottoms in Casco Bay !, in 5 to 10 fathoms, 
and once taken, between Eagle and Bates Islands, in 24 fathoms, 
hard bottom, 1873 ; several localities in and near Halifax Harbor!, 
