122 PINNOTHERIDjE. 



lar, very slightly narrowed forwards, convex, glabrous, and 

 solid ; the front projecting, arched, and entire ; the latero- 

 posterior margin slightly hollowed. The eyes small, round, 

 and filling the orbits. Sternum large and orbicular. An- 

 terior feet robust, the hands large, ovate, with two lines of 

 hairs beneath ; the fingers much curved, the moveable one 

 with a single tooth. The remaining pairs of legs fringed 

 with hair both above and below, terminating in a hooked 

 claw. The abdomen is broadest at the third joint, be- 

 comes narrower from this to the fifth, the sixth is a very 

 little broader, and the last abruptly narrower. 



FEMALE. (Figs. 3 and 4.) The carapace in this sex is 

 nearly orbicular, rather broader than it is long, without any 

 projecting front, or hollows at the latero-posterior margin, 

 soft and glabrous. The hands are oblong, weak, and fur- 

 nished beneath with a single line of hairs. The remaining 

 legs slender, the thighs fringed with a line of hairs on the 

 upper side only. Abdomen very large, broader than it is 

 long, almost evenly rounded. 



The colour of the male varies ; it is usually of a pale 

 yellowish grey, with rather darker symmetrical markings. 

 The female is ordinarily slightly transparent, brown above, 

 a yellow spot over the front, and an irregular one on 

 each branchial region ; the abdomen yellow, with a central 

 large triangular brown spot extending from the base nearly 

 to the extremity. 



In accordance with the opinion of Mr. W. Thompson, I 

 cannot but believe that the individual figured by Leach 

 under the name of P. Latrcillii, which he considered as an 

 immature female, in which he is followed by Milne Ed- 

 wards, is in fact a young male. The form and apparent 

 consistence of the carapace, the form of the hands, and 

 the colour, are all in favour of such an opinion. The form 



