186 JSfotes on North American Crustacea. 



in all armed with spines above, and sometimes below. Lengtli of carapai 

 in a male, 0.38 ; breadth, 0,3 inch. 



It differs from H. condyliata in its broader earapax, and in 

 the armature of the more compressed meros-joint of the ambu- 

 latory feet. 



It resembles much more closely the Lower Californian 

 species noticed above, but is very much smaller (supposing 

 our specimens to be adult), with fewer and more acute spines, 

 and much longer and more slender ambulatory feet. 



Found at St. Thomas by Mr. Riise. 



Iflitliraculiis coronatiis. 



Cancer coronatus Herbst, Naturg. d. Krabben und Krebse, i. 184, 



pL xi. f. 63. 



This species is remarkable for its triangular shape and great 

 breadth, the earapax being one-third broader than long. It is 

 allied to M. sculptus, but is differently sculptured, the oblique 

 furrows being deeper and the tubercles less numerous. The 

 gastric region also is more convex and much less smooth. 

 Front narrower. Antero-lateral margin straight, with three 

 tuberculiform teeth, the posterior one forming the sharply 

 prominent lateral angle. Meros-joint of the cheliped tuber- 

 culose above, with two teeth on the inner margin, very short, 

 and not spiniform. Fingers less gaping than in M. sculptus. 

 Length of the earapax in the male, 0.Y6 ; breadth, 1.05 ; pro- 

 portion, 1 : 1.39. 



Found at the Tortugas, Fla., by Mr. "VVurdemann and Dr. 

 Whitehurst, and at Aspinwall, Central America, by the Rev. 

 J. Howell. 



IHitliraculiis ciiictiiiianuis, nov. sp. 



Carapax subovate, nearly as broad as long, depressed, and resembling 

 that of M. scul2)tus in sculpture ; furrows of the surface, however, very 



