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Show 1900.] MAMMALS OF THE " SKEAT EXPEDITION." 881 b. 2 imm. sk. Gunong Inas, about 4000 ft. c. Gunong Inas. The adult 2 is typical and very spiny; the immature specimens, which are about | grown, are much darker, showing hardly any fawn-colour, and, except on the underparts, where the mature pelage has commenced to show itself, are entirely spineless. 45. Mus METTADA (Gray). Golunda mettada, Gray, Charlesworth's Mag. Nat. Hist. i. p. 586 (1837). a. 2 m al. Bukit nr. Biserat, Jalor, 12th June, 1899. This is, so far as I am aware, quite a new locality for this species, which is, however, a fairly typical specimen. 46. RHIZOMYS SUMATRENSIS (Raffles). Mus sumatrensis, Raffles, Tr. Linn. Soc. xiii. p. 258 (1822). a. 2 ad sk. Biserat, Jalor, 18th May, 1899. . b. 2 ad sk. Aring, Kelantan, 8th Sept., 1899. 47. HYSTRIX YUNNANENSIS Anders. Hystrix yunnanensis, Anders. Zool. Res. p. 332 (1880). a. Skull, ad. § . Biserat. b, c. 2 foetuses in al., taken from the above 5 . d. Imm. in al. 24th Jan., 1900. I have compared the skull with other Hystrix skulls in the Museums of Cambridge and London, and, although there did not appear to be a skull of this species among them, 1 had little difficulty in determining it. The characteristic points, which are well brought forward in the original description, are :- (i) The posterior border of tbe nasals being in a line with the posterior edge of the 1st molar. (ii) The posterior margin of the premaxillary is anterior to the 1st molar. (iii) The nearly equal breadth of the nasals throughout their length. (iv) The greatest length of the frontals being nearly equal to that of the nasals. The measurements of the skull are:- Greatest length 131 mm.; henselion to lower edge of occipital foramen 113 mm.; zygomatic breadth 68 mm.; length of nasals 53 mm.; greatest length of frontals 57 mm. ; breadth of conjoint nasals at posterior margin of premaxillae 29 mm.; ditto at tip 22 mm. 48. TRICHYS LIPURA Giinth. Trichys lipura, Giinth. P. Z. S. 1876, p. 739. a. 2 ad. sk. Ulu Selama, 12th Jan., 1899. This specimen, w7hich is young, is of chief interest as confirming the fact that this animal occurs in the Malay region, and consequently renders it possible that the species described by Buffon |
