224 CRUSTACEA. 



OcypodA pallidula, Hombron and Jacquinot. 



Plate 20, fig. 1 a, male, natural size ; b, hand, enlarged ; c, extremity 

 of fourth pair of legs. 



Tongatabu. 



This species, figured by Hombron and Jacquinot in the Zoological 

 Atlas of the Voyage au Pole Sud, in the Astrolabe and Zelee, under 

 D'Urville, has not been described, and we refer our specimens here with 

 hesitation. They give us the following characters. Length of cara- 

 pax, seven lines; breadth, eight and one-sixth lines; ratio, 1 : 1*16. 

 Peduncle of eye but slightly wider at tip of cornea than it is a short dis- 

 tance below. Legs not at all spinulous, the fifth joint short and thin, 

 pubescent above as well as on the sides, but not dense hairy. Larger 

 hand short and very broad, the part anterior to the fingers being even 

 broader than long, outer surface fine granulous, not coarser above; 

 lower finger at base rather broader than half its length. Inner sur- 

 face also granulous, especially its lower part ; and there is a crest upon 

 this surface near the articulation, but it is not hairy. Last joint of 

 the male abdomen triangular and about equilateral ; surface of the 

 carapax quite evenly fine granulous. Anterior angles advanced, and 

 in a line with the inner part of the upper margin of the orbit, or 

 but slightly posterior to it. The lateral surfaces of the body are 

 parallel and not divergent behind. The third joint of the outer 

 maxillipeds is hardly as long as broad, and the surface is uneven, 

 being granulous near the opposite margins. The tarsi are not wider 

 towards their tips. The eye reaches almost to the very base of the 

 peduncle, the interval left being much less than the breadth of the 

 peduncle at base. 



The figure of an Ocypod by Savigny, in the work on Egypt (Plate 

 1? fig- 2 ), referred to 0. rhombea by Audouin, has a close resemblance 

 to the above. 



0. cordimana ? Latr.— In Balabac Straits, two small specimens of a 

 species of Ocypod were collected, probably young, which have the 

 carapax as in cordimana, the anterior angles scarcely projecting ante- 



