106 DB. J, G. DE MAK ON THE PODOPHTHALMOITS 



than the propodites of these legs. The legs are somewhat hairy 

 towards their extremities. 



The external maxillipeds are quite similar to those of P. 

 glohosus. 



The crabs above described are about 10 raillim. broad. 



Pinnotheres parvulus was discovered by Stimpson in shells of 

 Meroe quadrata from the Chinese sea ; and the Leyden Museum 

 contains specimens found in shells of Gytherea from the coast of 

 Padang, Sumatra. 



Genus Xanthasia, White. 



67. Xanthasia MiJEiaERA, WTiite. 



Xanthasia murigera. White, Ann. 6f May. Nat. Hist. 1st ser. vol. xviii. 

 1846, p. 177; pi. ii. fig. 3. 



Xanthasia murigera, Milne-Edwards, Ann. Sci. Nat.i. xx. 1853, p. 221 ; 

 Alph. Milne-Edwards, Nouv. Arch, du Museum Hist. Nat. t. ix. p. 321. 



The. Collection contains two female specimens, the larger of 

 which is provided with eggs, whereas the other is sterile ; they 

 were found in Tridacna crocea, Lam., at Owen's Island. 



The cephalothorax of the larger specimen is 11 millim. broad 

 and 10 millim. long. la both specimens the lateral margins are 

 elevated into a thin acute crest or ridge, which, as White rightly 

 describes, is curled round, on each side, behind the lateral knob, 

 on the front of the carapace. In the smaller specimen both 

 lateral margins are continuous, passing into one another at the 

 posterior margin of the cephalothorax ; but in the larger specimen 

 they do not pass into one another, the posterior margin being 

 interrupted, though only by a narrow space, in the middle. The 

 front, the upper surface of the elevated prominence on the 

 middle of the carapace, and the outer surface of the posterior 

 margin of the latter, are minutely and irregularly granular. The 

 female abdomen, which bulges extremely, is coarsely and irregu- 

 larly punctate, but the wide rounded keel which it presents 

 in the middle is smooth. 



Xanthasia murigera has been recorded from the Philippine 

 and Piji Islands, and from New Caledonia. 



68. Xanthasia, sp. (PL VII. fig. 1.) 



The Collection also contains two other specimens of this genus, 

 found in the mantle-cavity of a Tridacna gigas in Elphinstone 

 Island Bay. As the upper surface of the cephalothorax of these 



