Notes on North American Crustacea. 217 



carapax. Inferior side of frontal margin transversely sulcate or chan- 

 nelled, and granulated. External antennae very sliort, reaching scarcely 

 beyond the frontal margin, Chelipeds and ambulatory feet smooth, 

 naked, and unarmed ; fingers acuminate ; dactyli pubescent, with long, 

 slender, acute unguicles. Color, pale orange ; postero-lateral surfaces, 

 above bases of feet, black ; fingers of the chelipeds and dactyli of the 

 other feet, dark colored. Length of carapax in a male, 0,18; breadth, 

 0,18 inch. 



Cape St, Lucas. J. Xantus. 



Eriphia g^onag^ra. 



' Cancer gonagra Fabr. 

 Eriphia gonagra M. Edw. ; Hist, Nat. des Crust, i, 426. Dana, U. S. 

 Expl. Exped. Crust, i. 250. 



Found at the Tortugas by Ci{)t. Woodbury and others; at 

 Aspinwall and at Panama by the Rev. J. Rowell. 



We cannot distinguish the Panama specimens from those 

 found on the east side of the isthmus. 



A variety (?) is found at Key Biscayne, at the Tortugas, and 

 at Aspinwall, in which the chelipeds are much more tubercu- 

 lated than in the typical forms, there being strong tubercles on 

 the carpus and on the lower half of the outer side of the hand. 



Dr. Cooper makes an interesting statement with reo-ard to 

 the habits of this species : — that they build nests of mud upon the 

 branches and roots of the mangrove at the edge of the water 

 into which they retire for concealment. The old world species 

 observed by myself {E. Smithii, levimana, spinifrons, etc.), 

 hide in small cavities of the rocks, from which it is extremely 

 difficult to extract them uninjured. 



Eriphia squamata. 



Eriphia squamata Stimpson ; Am. Lye. Nat. Hist. N. Y., vii. 56. 

 This species is further distinguished from E. gonagra by hav- - 



