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Show 3. On the Crustacea collected during the " Skeat Expedition" to the Malay Peninsula. By W . F. L a n c h e s t e r , M.A., King's College, Cambridge1. [Received October 14, 1902.] (Plates XXXIV. & X X XV .2) P art II.3-ANOMURA, CIRRIPEDIA, a n d ISOPODA. The species represented in the above-mentioned groups, in this collection, number 35 (not including the land Isopods), comprised in 20 genera ; of these 6 species are described as new, 2 among the Anomura and 4 among the Cirripedia ; in addition to which I have given names, among the Anomura, to one colour-variety, and, among the Cirripedia, to one subspecies and a colour-variety of that subspecies. In the latter case it will be seen that a single form has been burdened with four names, a proceeding which will not, I fear, find favour with many systematists; I have, however, given my reasons for so doing under the description of the form in question, and will oidy say here that I have not acted under any preconceived ideas on tbe general question of a quadrinomial nomenclature, but rather from the exigencies of the special case before me. Besides the marine Isopods herein described, there are in the collection some 10 species of land Isopods ; many of these appeared to me, on examination, to be as yet undescribed. At the same time it seemed to me advisable to have the opinion of a specialist in this difficult group, and I therefore applied to M. Budde-Lund, of Copenhagen, who very kindly undertook to examine the specimens, and who tells me that " several of them are not described, but I have the descriptions and drawings laying by from other collections." These species, then, will be included by M. Budde-Lund in a more general account of the land Isopods of the Malay Peninsula, to be published later on in these ‘ Proceedings.' A. ANOMURA. I. Genus P e tro listhes Stimpson. 1. P e tr o l isth e s speciosus Dana. Porcellana speciosn Dana, U.S. Expl. Exp. p. 417, pi. xxvi. fig. 8 (1852). Petrolisthes speciosus Ortmann, Zool. Jahrb. Syst. vi. p. 262 (1892). Lor. Pulau Bidan, Penang. A female. 1902.] ON THE CRUSTACEA OF THE " SKEAT EXPEDITION." 363 i Communicated by Dr. S. F. H a r m k e , F.Z.S. - For explanation of tbe Plates, soe p. 381. :i For Part I. soe P. / . S. 1901, vol. ii. p. 534. |