OCR Text |
Show 1 9 0 5 .] MR. J. Ii. BON HOTK ON MAMMALS FROM TIBET. 3 0 7 characters closely allied, though widely differing in colour. General appearance above fulvous grey, slightly greyer over the anterior part of the body; below very pale buff. Each hair is slate-grey from its base and for the greater part of its length, with a fulvous subterminal portion and dark tip. On either side, between the limbs, the dark tips are absent, leaving a clear fulvous patch. Interspersed in the fur are a few thin black bristles. The feet are whitish, both palms and soles are 5-tuberculate. The tail is bicolor. The ears small and sparsely covered with hairs similar in colour to those on the rest of the body. Mammae eight in number, four pectoral and four inguinal. Skull. The dental characters are practically identical with those of Ph. blythi. The skull itself is very similar in general outline, but slightly smaller; this is especially noticeable in the bullae, Text-fig. 53. A, upper, and B, lower right molar series of Microtus ivaltoni. which do not stand out so prominently from the rest of the cranium. Dimensions of type (from spirit). Head and body 98 mm. ; tail 30; hind foot 17 ; ear 10-5. Skull. Greatest length 28 mm.; basilar length 24'5 ; zygomatic breadth 16-5; interorbital breadth 4 ; length of nasals 7 ; diastema 8*2 ; palatal length 15 ; length of molar series (text-fig. 53) (alveoli) 7. Habitat. Lhasa, Tibet. Type. B.M. 5.4.6.5. 5 ad. Collected by Capt. H. J. Walton, [.M.S. This interesting species cannot well be confused with any other, |