260 BULLETIN 97, UNITED STATES NATIONAL MUSEUM. 



Merus of legs dilated and compressed, with the upper margins 

 acute and ending in a tooth a little behind the supero-distal angle; 

 iiiferp-distal angle, in all but last pair, dentate. Carpal joints with 

 a few small spines near the distal end of upper margin. Propodi 

 with sides strongly convex, upper and lower margins spiny. Dactyls 

 rather narrow, shorter than the propodi; strongly spinous above and 

 below, and terminating in slender claws. 



Abdomen of male widest at third segment, from which it tapers 

 to the tip, near which it converges more rapidly ; first segment much 

 longer than the second; third segment about as long as the fourth, 

 sides strongly convex ; fifth segment scarcely longer than the fourth, 

 and shorter than the sixth ; last segment triangular, acute. 



Measurements. Male holotype, length of carapace 18.5, width of 

 same 21, width of front 11.2 mm. 



Range. Known only from Doctor Holmes's description of the 

 single male from San Diego, California. (After Holmes.) 



Subfamily VARUNINAE Alcock. 



Grapsinae DANA, Amer. Journ. Sci., ser. 2, vol. 12, 1851, p. 287 (part) ; 



U. S. Expl. Exped., vol. 13, Crust, pt. 1, 1852, p. 334 (part). 

 Varnnacea MILNE EDWABDS, Ann. Sci. Nat., ser. 3, Zool., vol. 20, 1853, p. 



175 [141], 

 Cyclograpsacca MILNE EDWABDS, Ann. Sci. Nat., ser. 3, Zool., vol. 20, 1853, 



p. 191 [157]. 

 Grapsacea MILNE EDWABDS, Ann. Sci. Nat., ser. 3, Zool., vol. 20, 1853, p. 163 



[129], (part: Euchirograpsus) . 



Front moderately or little deflexed, sometimes sublaminar. The 

 declivous postero-lateral portion of the branchial region is set off 

 from the rest of that region by a line more or less distinctly marked. 

 The suborbital crest, which supplements the defective lower border 

 (if the orbit, is rather distant from the orbit and usually runs in a 

 line with the anterior border of the epistome. Antennal flagellum 

 usually of good length. External maxillipeds moderately or slightly 

 gaping, without an oblique hairy crest; the palp articulates with the 

 middle of the anterior border, or near the antero-external angle, of 

 the merus, and the exognath while typically broad and exposed 

 throughout, is in American genera rather narrow, and sometimes 

 partly concealed. The male abdomen rarely covers all the space be- 

 tween the last pair of legs. 



Genus CYRTOGRAPSUS Dana. 



Cyrtograpsus DANA, Amer. Journ. Sci., ser. 2, vol. 12, 1851, p. 288 ; Proc. 

 Acacl. Nat. Sci. Philadelphia, vol. 5, 1851 (1852), pp. 247 and 250; 

 type, C. angulatus Dana. 



Carapace broader than long, narrowing anteriorly, fronto-orbital 

 distance less than the length; convex; surface uneven, regions ex- 



