8 NEW-YORK FAUNA — CRUSTACEA. 



the upper edge : finger deflexed and furrowed ; thumb also furrowed and deflexed. Hands 

 generally unequal ; the smaller one sometimes with elevated lines on its outer face. 



Color. Hands white within and without. 



Length, - 4. Transverse diameter, 0*5. 



I have specimens of this species from the coast of Connecticut, but somewhat larger than 

 the one above described. I have little doubt but that it will be found on our coast. In con- 

 sequence of having mislaid my notes, I have cited in detail the description given by Dr. 

 Gould, who states it to occur on the Cambridge marshes near Boston, and not unfrequently 

 clinging to floating seaweed in Charles river. 



(EXTRALIMITAL.) 



aculeatus. (Cancer id. Say, Jour. Acad. Nat. Sc. Vol. 1, p. 449. Guerin, Icon, de Cuv. Crust, 

 pi. 3, fig. 92. Laporte, Vol. 2, p. 78. Milne-Edwards, Vol. 1, p. 420.) Hirsute. Shield 

 with about six blackish spines on each side, of which four are on the antero-latcral margin. Front 

 emarginate, and four or six-spined. Orbits three-spined. Arms and feet above with numerous 

 fissures. Shield varied with pale ferruginous. Length, 0-9 ; transverse diameter, 1 «1. Coast of 

 Georgia and Florida. 



GENUS CARCINUS. Leach. 



Shield nearly quadrilateral ; front advanced. Five teeth on the latero-anterior margin. Ocu- 

 lar peduncles short. Tarsi of the posterior pair narrow, flattened, lanceolate. 



Carcinus MCENAS. 



PLATE V. FIGS. 5 & 6. 



Cancer mccnas. I.IN. p. 1043. 



Carcinus id. Leach, Mai. Podopth. pi. 5. 



Cancer granulatus. Say, Jour. Acad. Nat. Sciences, Vol. 1, p. Gl. 



Carcinus mccnas. Milne-Edwards, Crustac. Vol. 1, p. 434, pi. 17, fig. 15, 16. Godld, Invertebrata of Mass. p. 321. 



Description. Body and feet granulate ; the surface of the shield with a few scattering hairs 

 in front, irregularly impressed as exhibited in the figure, and margined laterally and poste- 

 riorly by moniliform lines. Front with three obtuse teeth ; the central one slightly advanced. 

 A rounded blunt process under the internal canthus beneath. Sides beneath with long yel- 

 lowish silky hairs. Carpus with a white acute spine on the inner tip. Posterior pair of feet 

 shortest ; all the joints flattened, ciliate on the edges : terminal joint of the last pair falcate- 

 lanceolate, with marginal hairs, and with two deeply impressed lines on the upper and under 

 surfaces. 



