218 DK. J. G. DE MAN ON THE PODOPHTHALMOTJS 



In its outer appearance this species closely resembles P. 

 dentata, M.-Edw., with which it lives, as is proved by this collec- 

 tion. In the form of the carapace, front, chelipedes, and ambu- 

 latory legs, and in the armature of the latter, both species closely 

 resemble each other. Porcellana Boscii, however, is distin- 

 guished at first sight by the strong development of the minutely 

 granulated, squamiform, piliferous, elevated lines with which the 

 upper surface of the carapace and of the legs is covered. In 

 Audouin's species this remarkable ornament of the carapace 

 and of the anterior legs is distinctly visible to the naked eye, 

 whereas in P. dentata the lines are extremely small and short, 

 and only become visible by means of a magnify ing-glass. 



There are, however, other differences. In Porcellana Boscii 

 the inner margins of the fingers are hairy, whilst in Porcellana 

 dentata they are smooth and glabrous. In P. Boscii the upper 

 exterior margin of the meropodite of each chelipede (by which 

 that joint articulates with the carpopodite) is armed near the 

 posterior end with a small acute spine, which is not found in the 

 other species. 



Dimensions. 



millim. 



Length of cephalothorax 8f 



Breadth of same 85 



Length of carpopodite 5| 



Length of hand 12 



Porcellana Boscii has hitherto been recorded only from the 

 £ed Sea. 



Subgenus Pisosoma, Stimps. 



124. POECELLANA SCULPTA, M.-Edw. 



Porcellana sculpta, Milne-Edwards, Hist. Nat. des Crustac^s, t. ii. 

 p. 253. 



Pisosoma sculptum, Stimpson, Proc. Acad. Nat. Sci. Philad. 1858, p. 228. 



Porcellana pulchella, Haswell, Catal. Australian Crustacea, 1882, 

 p. 148. 



Pachycheles pulchellus, Miers, Report Voyage of H.M.S. 'Alert,' 

 1884, p. 273, pi. XXX. fig. A. 



The collection contains a young specimen from Sullivan Island, 

 which I refer to this species. 



