THE GRAPSOID CRABS OF AMERICA. 325 



Lagoa do Norte, Maceio, Brazil; on mangroves; July 27, 1899; 

 Branner-Agassiz Exped. ; 3 females (25714). 



Mapelle, Bay of Bahia, Brazil; 1876-1877; Richard Rathbun; 1 

 male, 2 females (1 ovig.) (40G04). 



Estasao Piassaguera, Santos, Brazil; May, 1913; H. Luderwaldt; 

 2 females ovig. (47854). 



Boca del Jesus Maria, Costa Bica; April, 1905; P. Biolley and 

 J. F. Tristan; 1 male (323G5). 



Guayaquil, Ecuador; Dr. W. H. Jones, U. S. N.; 1 male (15109). 



Near Capon, Peru; Feb. 2, 190G-1908; R. E. Coker; 1 femnle 



(40449). 



Genus CYCLOGRAPSUS Milne Edwards. 



Gyclograpsus Milne Edwards, Hist. Nat. Crust., vol. 2, 1837, p. 77; type, 



C ptinctatns Miine Edwards. 

 Chiathochasmus MacLeay, Zool. S. Africa, Annulosa, 1S3S, p. 05; type, 



G. barbatus MacLeay, 1S3S=C'. punctatus Milne Edwards, 1S37. 



Carapace with the front and antero-lateral margins forming a 

 regular curve, postero-lateral margins subparallel, posterior margin 

 long. No lateral teeth. Surface flat, except anterior third, which is 

 deflexed; regions little marked and almost smooth. 



The front and orbits occupy more than two-thirds the width of 

 the carapace, front between one-third and one-half width of carapace. 

 Lower margin of front nearly transverse. Orbits transversely oval, 

 completely filled by the eyes. 



The hairs of the side walls are stouter and the granules more 

 irregular than in Sesarma. Antennules transverse; antennae short, 

 lying in the orbital hiatus. Epistome short, fore and aft. Buccal 

 cavern narrowing anteriorly. Maxillipeds widely gaping; merus 

 elongate-quadrate, the palpus articulating on the anterior margin 

 near the outer angle. 



Chelipeds rather massive in the male, subequal, nearly smooth; 

 palm swollen; fingers pointed. Legs narrow, of moderate length, 

 second pair longest. 



Abdomen with seven segments in each sex, in the male not occupy- 

 ing the whole breadth of the sternum between the last pair of legs. 



Tropical and subtropical America; tropical Pacific to Australia 

 and New Zealand; East Atlantic. 



Analogous species on opi)osite sides of the American continent: 

 integer (Atlantic), cinereus (Pacific). 



KEY TO THE AMERICAN SPECIES OF THE GEXOS CTCLOGUAPSUS. 



A\ Carapace without a postorbital gutter below the antero-lateral margin. 



integer, p. 32G. 

 A*. Carapace with a postorbital gutter below the antero-Iater;ii margin. 



B\ Front strongly deflexed. No t.ootli on nierus joints of legs_ Mncrcus, p. 327. 

 B*. Front slightly deflexed. An obtuse tooth on morns joints of legs. 



punctatus, I). 32S. 



