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Show 1 9 0 5 .] MR. J. L. BONHOTE ON MAMMALS FROM TIBET. 3 0 5 is normal, except for the great length of the canines already noted, calls for but little comment. Tlie spaces between the premolars are large in correlation with the length of the muzzle, and the first upper molar is relatively small. Dimensions:- V. ferrilatus. V. v. waddelli. Greatest length..................................... mm. 155 mm. 145 Basal length .......................................... 138 130 Palatal length ..................................... 78 71 Length from post, end of palate to basioccipital ..................................... 60 59 Length from last incisor to ant. root of 1st premolar (alveoli) ................ 19 16 Length of premolar series ................ 48 39 Breadth of brain-case immediately behind supraorbitals........................ 26 23 Greatest breadth of brain-case............ 50-5 49 Zygomatic breadth ............................. 84 72 Breadth of muzzle at ant. root of 2nd premolar ................................. 19 23 Length of upper canine along its anterior margin................................. 29 20 This comparison of dimensions will show more clearly than any description the main features in which this skull differs from that of the more typical " Vnlpes " ; and in spite of the doubt of Mivart * there can be no question that ferrilatus not only is a good species, but is more differentiated than any other species in the region. The only other skull of ferrilatus known is a very young one collected by Mr. Hodgson ; it is, however, too young to show any of the specific characters enumerated above. P u t o r iu s a l p in u s (Gebler). Mustela alpina Gebler, Mem. Soc. Imp. Nat. Moscou, vi. p. 213 (1823). Putorius alpinus Blanford, Faun. Br. Ind., Mamm. p. 168 (1891). a. $ ad. (in spirit). Gyangtse, alt. 12,900', 1904. b. 3 . Khamba Jong, alt. 15,500', 11th Sept., 1904. C r ic e t u l u s l a m a . Gricetulus lama Bonhote, Abstr. P. Z. S. No. 22, p. 14. Nov. 21, 1905. a. S ad. Lhasa (skinned from spirit). b. 3 ad. Lhasa (in spirit). The Cricetulus referred to t as " the little white mouse " is * Loe. eit. ante. f Percival Landon : Tibet,' App. by H. J. Walton (1905). |
