252 REPORT OF COMMISSIONER OF FISH AND FISHERIES. [546] 
Island, will very likely be found rarely upon the beaches at Nantucket, 
and on the southern part of Cape Cod. It lives in deep burrows, above 
the reach of tides, upon sandy beaches. It is readily distinguished from 
the ‘ fiddlers” by the nearly equal claws or hands, which are alike in 
both sexes, and by its color, which is almost exactly like the sand upon 
which it lives. It is carnivorous and very active, running with great 
rapidity when pursued. 
The synonymy of this species is in much confusion, and I have not 
attempted to rectify it here, although there are apparently several 
names which antedate that of Say. The Brazilian species, usually 
called rhombea appears to be identical with ours, and if it is really the 
rhombea of Fabricius, his name shouid undoubtedly be retained. 
SESARMA RETICULATA Say. (p. 467.) 
Journal Acad. Nat. Sci., Philadelphia, vol. i, pp. 73,76, Pl. 4, fig. 6, 1817; p. 442, 
1818; Smith, Trans. Conn. Acad., vol. ii, p. 156. 
From Long Island Sound to Florida, nsually upon salt marshes and 
associated with Gelasimus pugnax. 
PINNIXA CYLINDRICA Say. Plate I, fig.1. (p. 367.) 
Journal Acad. Nat. Sci., Philadelphia, vol. i, p. 452, 1818. 
Vineyard Sound and Long Island Sound to South Carolina. 
PINNOTHERES OSTREUM Say. Plate I, fig. 2, male. (p. 367.) 
Loe. cit., p..67, Pl. 4, fig. 5, 1817; DeKay, op. cit., p. 12, Pl. 7, fig. 16. 
Massachusetts to South Carolina. 
PINNOTHERES MACULATUS Say. (p. 434.) 
Loe. cit. p. 450, 1818. 
It livesin Mytilus edulis on the New England coast, and is found from 
Cape Cod to South Carolina. 
CANCER IRRORATUS Say. (pp. 312, 530.) 
Loe. cit., p. 59, Pl. 4, tig. 2, 1817; Stimpson, Annals Lyceum Nat. Hist., New York, 
vol. vii, p.50, 1859. Platycarcinus irroratus Edwards, Hist. nat. des Crust., tome 
i, p. 414, 1834; DeKay, op. cit., Pl. 2, fig. 2. Cancer Sayi Gould, Report on the 
Invertebrata of Massachusetts, 1st edit., p.323, 1841. Platycarcinus Sayi DeKay, 
op. cit.,p.7. Cancer borealis Packard, Memoirs Boston Nat. Hist. Soe., vol. i, 
p. 303, 1867. 
Labrador to South Carolina. 
CANCER BOREALIS Stimpson. (pp. 486, 493.) 
Loe. cit., p. 50, 1859. Cancer irreratus Gould, op. cit., p. 322. 
Nova Scotia to Vineyard Sound and No Man’s Land. It very likely 
occurs both north and south of these limits, as it seems to be rare or 
local, and is often, perhaps, confounded with the far more common C, 
irroratus, although it is a perfectly distinct species. 
