DEC A POD A. 

 BRACHYURA. 



LONG-LEGGED .SWIMMING CRAB, 3(51 



PORTUNIDJE. 



LONG-LEGGED SWIMMING CRAB. 



Portunus longipes. Risso. 



Specific Character. — Front slightly four-lobed ; latero-anterior margin much 

 shorter than the latero-posterior ; legs remarkably long. 



Portunus loiiyipes. 



infractus, 

 Dalyelii 



Risso, Crust, des Env, de Nice, t. i. f. 5, p. 30; Hist. 



Nat. de TEur. Merid. V. p. 4, — Latr. Encycl. X. 



p. 192.— Roux, Crust, de la Medit. t. iv. — Edw. 



Hist. Nat. des Crust. I. p. 445. 

 Otto, Mem. de I'Acad. de Bonn, XIV. t. xx. f. 1. 



S. Bate Annals of Nat. Hist. 1851, p. 320, t. xi. 

 f. 9. 



The general form of this interesting species is very dif- 

 ferent from that of the others of the genus. It is altogether 

 more slight and slender in its proportions. The carapace 

 is flattened, and, in the male, broader than it is long, in 

 the proportion of three to two ; in the female the dis- 

 proportion is not so great. It is divided transversely by a 

 ridge, which terminates at each side in a long and sharp 



