CENTEITEOIDES. 



21 



four narrow black stripes ; terga coloured as in & vittatus ; 



■ 



tail of male as in C. ornatus . . . . » . • . . • . 



h x . ITpperside of carapace and terga uniformly coloured in the adult, 



a 1 . Legs, chelse, sterna, and tail uniformly ochre-yellow; terga 



either the same tint as the legs or tinted with fuscous; vesicle 



of male evenly oval when viewed from below. 



a 8 . Keels on hands and last sternal plate strong and smooth or 



almost smooth ; subaculear spine long and sharp . . . 

 b 3 . Keels on hands and last sternal plate evenly and finely 



granular ; subaculear tooth small* 

 a 9 . Vesicle of male ovate, only twice as long as wide . * . 



elegans, Thor. 



ochraceus, Poc. 



bertholdiy Thor. 



b 9 . Vesicle of male long, nearly three times as long as wide . subgranosus, Kraep 



b* 1 . Chelse with the hands much darker than the brachium ; tail 



much darker posteriorly ; upperside of trunk deep reddish- 



or blackish-brown ; chelae thickly hairy ; vesicle of male 



broad and shouldered at base of aculeus * 



b. Fingers of chelse furnished with nine rows of teeth along the middle line, 



not including a short apical row. 

 a 10 . Subaculear spine close to base of aculeus, barely its own basal width 



margaritatus, Gerv. 



a 



b 



from it; its apex turned towards the aculeus. 



\ Legs, chelse, trunk, and tail uniformly black, only the tips of the 



fingers and the tarsi pale . f nigrescens, Poc. 



b Ll . Not uniformly black; the legs rich yellow; at least the humerus 



and basal segments of the chelse yellow, last tergal plate paler 

 than the rest ; anterior caudal segments yellowish, the posterior 

 darker. 

 a 12 . Brachium of chela the same colour as the hand and much 



darker than the humerus fulvipes, Poc. 



b 12 . Brachium of chela pale yellowish like the humerus and much 



paler than the hand ............... nigrimanus, Poc. 



. Subaculear spine more than its own basal width from the aculeus, 



from which its apex is turned 



a 



13 



limbatus, Poc. 



b 



13 



a 



14 



b 



Colour of body, legs, chelse, and tail yellow, except that the edges 

 of the terga, the fingers, and the end of the tail are black . , . 



At least the carapace and terga (with the exception of the last in 

 C. bicolor) blackish or deep brown. 

 Last tergal plate of abdomen yellow ; hands much darker 

 than brachium bicolor, Poc. 



■ 



Last tergal plate of abdomen not yellow, at most a little paler 

 than the rest ; hand not darker, usually paler than brachium. 

 Pectinal teeth 20-23 ; granules on caudal keels few in number 

 and remote from each other rubricauda, Poc 





14 



a 



15 



6 15 . Pectinal teeth 26-36; granules on caudal keels numerous and 



close-set \ ...... • gracilis, Latr. 



\ 



