The African Swimming Crabs. 151 



Callinectes bocourti A. Milne Edwards. 



CaUlnct'les bocoitrti A. Milne Edwards, Crust. Reg. Mex., 226, 1879 (variety 

 of C. diacavihua). Riviere de Mnllins, 20 miles south of Belize, Hon 

 duras. Types examined. 



Callinectes cayennensis A. Milne Edwards, loc. tit. (variety of C. diacanlhus) . 

 Cayenne. Types examined. 



CaUwectes ? bocourti Rath bun, op. cit., 360. Not C. africanus A. Milne 

 Edwards. 



Specimens of C. bocourti from British Guiana in the British Museum are 

 labeled " C. trispinosus Leach;" so also are specimens of C. exasperatus 

 from Jamaica. Probably neither are types, as the locality of Lupa trispin- 

 osa is not given by Leach. 



Distribution. West Africa: Senegal (U. S. Nat. Mus., No. 18735) ; Libe 

 ria (Berlin Mus., No. 3647) ; Chinchoxo (Berlin Mus., No. 5566). Ameri 

 can coast: Honduras to Rio de Janeiro, Brazil. 



Callinectes latimanus Rathbun, new species. 



This species is so closely related to C. toxotes Ordway, from the west 

 coast of America, that it may be described by comparison with that species. 

 Cardiac and inner branchial areolets less elevated. Length of intra- 

 medial area about equal to, but not exceeding, its posterior width. Four 

 frontal teeth (fig. 6) less advanced, triangular and subacute 

 instead of rounded or lobiform. Suborbital tooth broader yXyv/^/V 

 toward the extremity. Antero-lateral teeth FlG 6 _ Calh -. 

 shorter, that is, less projecting ; margins of nectes latima- 

 second to fifth pairs, inclusive, considerably nus. Frontal 

 shorter than their basal width. teeth - x ** 



In the abdomen of the male (fig. 7) the third or compound 

 segment is shorter than in C. toxotes ; the penultimate seg 

 ment is broader at its proximal end and much constricted 

 FIG. -j.C. lad- at one _t],j r( | the distance from the proximal end. Sides of 



mantis. Abdo- * . 



men of male, terminal segment sinuous. Appendages reaching beyond 



X %. the tip of the abdomen. In the female the sixth segment 



is only slightly longer than the fifth. 



Meri of chelipeds three-spined on inner 

 margin. Propodus of larger cheliped (fig. 8) 

 with the lower margin very convex below the 

 basal half of the pollex. The fingers are there 

 fore more gaping, the pollex being no wider FlG - 8. c. latimanus. Larger 

 than in C. toxotes. 



Dimensions. <j\ No. 19877: Length to median sinus of front, 51 mm. ; 

 to tips of frontal teeth, 52.5; width, 115; length of lateral spine, 11.8; 

 of preceding tooth, 4.5. 



Type locality. Lagos, Bight of Benin, Guinea ; Sir A. Molony, collector. 

 A fine series of this species is preserved in the British Museum (No. 91. 

 4. 1). One specimen, a male, has been presented to the U. S. National 

 Museum (No. 19877). 



