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Show 1904,] ON NUDIBRANCHS PROM EAST AFRICA AND ZANZIBAR. 8 3 such other Agamids as, for example, Amphibolurus barbatus (also exhibited). If the specimen exhibited by me be not a mere variation, I can understand how it is that the presence of femoral pores has been asserted by some and denied by Gray. For there are along the thigh a few larger scales which might lead to the inference that they were perforated scales. They are not so, however; and when the skin is reflected no glands can be seen ; these always accompany the femoral pores, which are, of course, the external apertures of their ducts. Mr. Oldfield Thomas, F.R.S., F.Z.S,, exhibited, on behalf of the President, a sketch by a Chinese artist of a hind and fawn of P£re David's Deer (Elaphurus davidianus) from Hainan. Unfortunately the artist had added the antlers of a Peking Stag (Cervus hortulorum). The sketch was taken from specimens presented to Mr. E. T. C. Werner, H.B.M. Consul at Hainan. It served to prove that Pere David's Deer still survived in Hainan. Whether, howrever, it was indigenous or imported, remained to be determined. Mr. Lydekker was in communication with Mr. Werner on the subject. ______ The following papers were read :- 1. On some Nudibranchs from East Africa and Zanzibar. Part V * By Sir C. E l io t , K.C.M.G., late H.M. Commissioner for the East African Protectorate, F.Z.S. [Received March 10, 1904.] * (Plates III. & IY. t) In my last two papers I treated of the Dorididse Crypto-branchiatse as a group, but no systematic importance is to be attached to the order in which the species now to be described are arranged. P t e r a e o l id ia sem p e r i .-Since writing my description of this species in my second paper (P. Z. S. March 17, 1903, p. 255), I have read Prof. Bergh's account of JVossis, characterised by a lateral ridge similar to that found in some of my specimens (‘ Opisthobranchiata of Danish Expedition to Siam,' 1899-1900, p. 52), and accordingly carefully re-examined them to see if they should not be leferred to this new genus. It appears that they should not. The radula is uniseriate, consistently of 18 teeth, and the same in the specimens which have and those which have not the lateial ridge. It therefore seems clear that the ridge is found in the genera where the radula is uniseriate as well as in those where it is triseriate, and, further, that in alcoholic specimens, at any rate, it may be present or absent in the same species. * For Part IV . see P. Z. S. 1904, vol. i. p. 380. f For explanation of the Plates, aec p. 105. |
