218 DR. J. G. DE MAN ON THE PODOPHTHALMOUS 
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 magnifying-glass. 
There are, however, other differences. In Porcellana Boscit 
the inner margins of the fingers are hairy, whilst in Porcellana 
dentata they are smooth and glabrous. In P. Bosew 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. 
Wenoth of cephalothorax <.). 44%. ou 1s ee ee 83 
Breadth Of ame... .4'. 54's. 4a see ee 83 
iheneth of carpopodite. .i'....5:. . stot enna 5 
Ibeneth-of hand, 4.02... 2 seis tec ae eee 12 
Porcellana Boscii has hitherto been recorded only from the 
Red Sea. 
Subgenus Pisosoma, Stumps. 
124. PorRcELLANA scuLPTa, J/.-Hdw. 
Porcellana sculpta, Milne-Edwards, Hist. Nat. des Crustacés, t. il. 
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. 2/3, pl. xxx. fe. A, 
The collection contains a young specimen from Sullivan Island, 
which I refer to this species. 
