116 



' TERRA NOVA " EXPEDITION. 



sixth segment, and consists of two successive plates. The 

 two lateral pieces of the hinder edge are less independent 

 than in Eupagurus, and there is a median notch, not a point, 

 as in Chilton's and Lenz's figures. The sub-anal valve* is 

 present, though soft. The telson is carried folded under the 

 sixth segment. The dorsal side of the abdomen, which in life 

 is covered by the flat shell of a mollusc, as will be explained 

 later, is smooth and only sparsely hairy, but the sides and 

 ventral surface, which are exposed, are rough-skinned and 



much more hairy. I can detect no trace of sterna. 



The eyes, antennules, and antennae (Figs. 1 and 2) closely resemble those of 



Eupagurus. The scales on the bases of the eyestalks are present, but hidden by the 



Fig. 6. — Porcellanopagitrim : 

 dorsal view of the end 

 of the abdomen of the 

 specimen shown in Eig. 1, 

 X 5. 



Fig. 7. — Porcellanopagiirus : mouth-Hmbs of the left side of the specimen shown in Fig. 1. — a, Mandible, 

 ventral view ; a^, the same, dorsal view ; 6, maxUlule, ventral view ; h'^, the same, lateral view ; c, 

 maxilla ; d, first maxilliped ; e, second maxilliped ; /, third maxilliped. 



rostrum. The antennary exopodite, by an extraordinary error, is figured by Filhol {loc. 

 cit. fig. 2) on the ventral side of the limb, and Lenz omits it altogether in his figure of 

 P. jjlatei. In P. edwardsi and P. tridentatus it is, as a matter of fact, situated in the 



* See Gardiner's " Fauna of the Maldives," Art. " Land Crustaceans," vol. I, pp. 73, 81. 



