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Show 1873.] DR. A. GUNTHER ON REPTILES AND BATRACHIANS. 165 unconditionally, in some of our latest and largest books of microgra-phic and comparative anatomy, and without any reference to the eminent physiologist who originally propounded it, the present measurements are at variance with Wagner's conclusion. Indeed it was as much nullified by Van der Hoeven's discovery, in the year 1841, of the large size of the corpuscles in Cryptobranchus, and by the proof much later of their still greater magnitude in Amphiuma, both species with evanescent gills. As little relation appears between the size of the species and the size of the corpuscles; for these are larger in the little Proteus and Amphiuma than in the gigantic Sieboldia. And this accords with m y old measurements, which, while proving that there is such a relation in one and the same order of mammalia and birds, showed that the same rule is not applicable to the lower Pyrenaematous Vertebrates. 3. Notes on some Reptiles and Batrachians obtained by D r. Adolf Bernhard Meyer in Celebes and the Philippine Islands. By Dr. A . G U N T H E R , F.R.S., F.Z.S. [Received December 11, 1872.] (Plates XVII., XVIII.) HYDROSAURUS. In Proc. Zool. Soc. 1872, p. 145, pis. 7 & 8, I have described and figured two species of Hydrosaurus from the Philippines ; but the exact habitat was known of one of them only. I am now able to give more precise information in this respect. 1. Hydrosaurus marmoratus is described by Cuvier and Wieg-mann as coming from Manila. A fine specimen was obtained by Dr. Meyer in Luzon, so that this species appears to be confined to this island. 2. Hydrosaurus nuchalis is from Negros; several specimens of different ages were brought by Dr. Meyer; another we have bought of Hrn. Salmin, all showing the peculiar development of the nuchal scales. 3. Hydrosaurus cumingii from Mindanao is still represented by one example only. TROPIDOPHORUS GRAYI. One specimen was obtained by Dr. Meyer in Luzon; and at a somewhat later period w e purchased three other examples of different ages of Hrn. Salmin, without precise information as regards their habitat. All these specimens differ slightly from the typical examples in having smaller gular scales. HINULIA VARIEGATA. (Plate XVII. fig. B.) This species has been very properly distinguished by Prof. Peters from Hinulia ncevia, which has smaller scales, and the vertical sepa- |