252 KEPOKT OF COMMISSIONER OF FISH AND FISHERIES. [546] 



Island, will very likely be found rarely upon the beaches at Kan tucket, 

 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 &quot;fiddlers 7 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. 9 



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 

 rhomlea of Fabricius, his name should undoubtedly be retained. 



SESARMA RETICULATA Say. (p. 467.) 



Journal Acad. Nat. Sci., Philadelphia, vol. i, pp. 73, 76, PL 4, tig. 6, 1817 ; p. 442, 

 1818 ; Smith, Trans. Conn. Acad., vol. ii, p. 156. 



From Long Island Sound to Florida, usually upon salt marshes and 

 associated with Gelasimus pugnax. 



PINNIXA CYLINDRICA Say. Plate I. fig. 1. (p. 3G7.) 



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.) 



Loc. 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.) 



Loc. cit. p. 450, 1818. 



It lives in Mytilus edulis on the New England coast, and is found from 

 Cape Cod to South Carolina. 



CANCER IRRORATUS Say. (pp. 312, 530.) 



LOG. cit., p. 59, PL 4, fig. 2, 1817 ; Stimpson, Annals Lyceum Nat. Hist., New York, 

 vol. vii, p. 50, 1859. Platijcarcinus irroratus EcUvards, Hist. nat. des Crust., torne 

 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. Soc., vol. i. 

 p. 303, 1867. 



Labrador to South Carolina. 

 CANCER BOREALIS Stimpson. (pp. 486, 493.) 



Loc. cit., p. 50, 1859. Cancer irroratus Gould, op. cit., p. 322. 



Xova Scotia to Vineyard Sound and No Man s Land. It very likelj 

 occurs both north and south of these limits, as it seems to be rare or 

 local, and js often, perhaps, confounded with the far more common (7. 

 irroratus, although it is a perfectly distinct species. 



