106 



PORTUNID^E. 



surface obsoletely minutely granulated, smooth and naked, 

 with an arched line of very slightly raised points, separating 

 the hepatic from the branchial regions, and a sulcus be- 

 tween the latter and the genital. Latero-anterior margin 

 with five acute flattened triangular teeth : the points di- 

 rected forwards, the last being the most acute and the 

 longest. Posterior margin waved, broad, moderately hol- 

 lowed at each side. Front with three teeth, the middle 

 one slightly longer than the others all rather obtuse. 

 Anterior feet strong, angular ; the wrist with a rough 

 irregularly rhomboid area on the upper surface, bounded 

 by a raised denticulate line; the anterior angle with a 

 very strong tooth. Hands with four distinct carinse, which 

 are generally slightly denticulate ; the superior one ter- 

 minating in a small sharp tooth. Fingers longitudinally 

 carinated, strongly tuberculated ; the moveable one much 

 curved. The second, third, and fourth pairs of feet rather 

 slender, compressed ; the terminal joint curved, hairy on 

 the inferior edge ; the fifth pair having no raised lines on 

 the terminal and penultimate joints ; the whole fringed with 

 hair ; the terminal joint very smooth, ovate and slightly 

 mucronate. Abdomen in the male, five-jointed, triangular ; 

 the second and third joints transversely acutely carinated ; 

 in the female seven-jointed, also triangular, but broader, 

 and with the second and third joints similarly carinated. 



Length of the carapace 

 Breadth of ditto 



In. Lines. 

 1 3 

 1 6 



The colours of this species are exceedingly varied and 

 beautiful, particularly in the males. Buff, light-brown, deeper 

 brown, and brownish red are arranged over the carapace, in 

 varied but always exactly symmetrical patterns. The only 

 way in which these beautiful markings can be preserved is, 



