262 BULLETIN 97, UNITED STATES NATIONAL MUSEUM. 



Diagnosis. Antero-lateral teeth prominent. A postero-lateral 

 tooth. Front strongly bilobed. 



description. Carapace somewhat hexagonal; margins and sur- 

 face granulate; three short transverse elevations on either side of the 

 gastric region; mesogastric and cardiac regions prominent. Front 

 with each lobe curved upward, sides (inner border of orbit) oblique. 

 Orbit with a superior notch; outer tooth acute with convex outer 

 margin. Next tooth on the side smaller, less curved; second tooth 

 still smaller, and short-pointed; third tooth most prominent, acumi- 

 nate, a single curved line of granules runs inward from it. On the 

 postero-lateral margin is a low, blunt, obtuse-angled tooth. 



Chelipeds granulate. Inner surface of carpus flattened, obtuse- 

 angled. Propodus of adult male a little higher than its superior 

 length, flattened above; a longitudinal ridge above the lower mar- 

 gin. Dactylus one and one-fourth times as long as upper margin of 

 palm; pollex slightly deflexed. Fingers with a narrow gape; teeth 

 small and low. 



Third pair of legs the longest. Merus joints of all the feet with 

 subparallel sides, and a subterminal tooth on the anterior border. 

 Last three joints of last pair fringed vith hair; propodus and base 

 of dactylns of first and second pairs fringed posteriorly. 



Measurements. Male holotype, length of carapace 37, width of 

 same 44.5 mm. 



Range. From Rio de Janeiro, Brazil, southward to Patagonia, 

 thence northward on the Pacific coast to Peru. 



Material examined. 



Rio de Janeiro, Brazil; Capt. Harrington; 1 male, holotype of 

 C. cirripes (6125, M. C. Z.) ; received from Peabody Acad. Sci., Nov., 

 1885. 



Montevideo, Uruguay; 1897; Bisege, collector; from Mus. S. 

 Paulo; 1 female (48318). 



Rio de la Plata; Capt. Page, collector; 2 males identified by W. 

 Stimpson (24G9). 



Rio Negro, Patagonia ; U. S. Exploring Exped. ; 2 males, 2 females 

 (1 male is holotype) (2346). 



San Lorenzo Island, Peru ; Dr. H. E. Ames, U. S. Navy ; 5 males, 

 1 female (18624). 



CTRTOGRAPSUS ALTIMANUS Rathbun. 



Plate 60. 



Cyrtograpsus altimanus RATHBUN, Proc. U. S. Nat Mus., vol. 47, 1914, p. 

 121, pi. 4 (type-locality, San Matias Bay, Patagonia; holotype male, 

 Cut. No. 6126, M. C. Z.). 



Diagnosis. Antero-lateral teeth not prominent. No postero- 

 lateral tooth. Front faintly bilobed. 



