318 On a neic Japanese Vule. 



Description. — General colour of head and body biifFy 

 brown, with a greyish tinge on some hairs, this colour 

 passing gradually on the sides into the grey of the under 

 surface, which is often tinged with bufFy. Tail dark above, 

 grey beneath, not sufficiently haired to conceal the scales; 

 averaging GO'8 mm. in length in the seven specimens ex- 

 amined. Hands and feet greyisli or dusky ; hind foot 17*5 

 to 20 mm. long. Ears like head and back; usually 12 to 

 13 mm. long. 



Measurements of type. — Head and body 107 ram. ; tail 63 ; 

 hind foot 18 ; ear 12. 



Skull. — Much shorter, but very nearly as broad as that of 

 C. andersoni. Nasals shorter, but equally broad ; inter- 

 orbital region broader ; palatal foramina longer ; diastema 

 longer than in C. andersoni. 



Skull-measurements of type. — Greatest length 25"3 ram. ; 

 basilar length 22*5; zygomatic breadth 14-5; nasals 7*3; 

 interorbital breadth 4 ; breadth of brain-case 11"5 ; palatal 

 length 11*9; diastema 7'4 ; palatal foramina 5'2 ; length of 

 upper molar series 5'5. 



Pattern of upper molars as in Craseomys andersoni, with 

 three re-entrant angles on each side of wi', dividing that 

 tooth into five cement-areas. 



Seven specimens examined, four males and two females 

 from Akakura, Niigata Prefecture, collected by Kiyoshi 

 Kanai, and presented to the British Museum by the Hon. 

 N. C. Rothschild ; and one male from Makadoj near 

 Nohechi, Aomori Prefecture, extreme north Hondo, collected 

 by the author, and presented by the Duke of Bedford, K.G. 



In studying Craseomys niigatce I have compared the 

 molars of this species with those of a large series o^ Evotomys 

 {Phaulomys) smithii, Thos., and I find that, although the 

 tooth-pattern of the type of Phaulomys is quite different from 

 that of Craseomys, there are among specimens not separable 

 from smithii many individuals with a tooth-pattern closely 

 resembling that of C. andersoni and C. niigatce. There are 

 many examples intermediate between andersoni and smithii, 

 and those resembling smithii are greatly in the minority. 

 Mr. Thomas himself first drew attention to this *. These 

 observations lead me to conclude that "Phaulomys"'^ is really 

 Craseomys. 



* Cf. Thomas, P. Z. S. 1905, yol. ii. p. 356. 



