1905.] MAMMALS FROM JAPAN. 351 



c? . 122, 123, 124, 130, 134, 137. $ . 135. Noboribetsu, near 

 Moi'uran, Hokkaido. 



" Common in bamboo-grass." 



Similar to true M. geisha in all respects except that the general 

 colour averages slightly paler (nearly as pale as " Isabella," but 

 of a more rufous brown), and the ears are decidedly shorter. 



Dimensions of the type, measured in the flesh : — 



Head and body 90 mm. ; tail 95 ; hind foot 19 ; ear 12'5. 



Skull — greatest length 23'5 ; basilar length 18 ; palatilar length 

 10 ; palatal foramina, 5 ; length of upper molar series 3' 6. 



Hah. Hokkaido ; type from Noboribetsu. 



Type. Adult male. B.M. No. 6.1.4.269. Original number 123. 

 Collected 21 November, 1904. 



The ear-measurement of M. geisha was given in the original 

 description as 12"5 mm., but this was taken on a poorly-made skin, 

 and it is evidently below the correct dimensions. For of nine 

 adult Izu examples seven have been measured hj Mr. Anderson as 

 14 mm., and two as 13'5, while of thirteen adult Hokkaido skins 

 two have this measurement 12, two 12*5, eight 13, and one 13"5. 

 Little as this difference sounds in figures it is easily recognisable 

 by eye. 



The occurrence in Hokkaido of representatives of Micromys 

 speciosus and geisha shoAvs that there is a genuine Japanese 

 element in the fauna of that island, mixed with the boreal non- 

 Japanese fauna indicated among others by the occui^rence of 

 Sciurus vulgaris instead of lis, and Lepus timidus instead of 

 hrachyurus. 



33. Micromys minutus japonicus, subsp. n. 



c^ . 286. Jinrio, Tokushima Ken, Shikoku. 500'. 

 c?. 322. Tanano, Tokushima Ken, Shikoku. 250'. 

 5 . 462. Kawachi, Miyasaki Ken, Kiushiu. 1500'. 

 General colour above dusky sepia, the rump only rufous, as in 

 the Eastern forms of minutus ; helly sharply contrasted white, 

 though with slaty bases to the hairs, as in the European races. 

 One old specimen, however, is more or less rufous over the whole 

 of the upper surface ; but this would seem to be an exception. 



Skull apparently thicker and heavier than in the other races, 

 with an unusually large brain-case and short muzzle, but material 

 is lacking for a satisfactory comparison Avith the Eastern forms 

 jiygmceus and ussuricus *. Molars decidedly larger than in 

 ussurictcs, which has the tooth-roAv only 2-8 mm. in length. 

 Dimensions of the type, measured in skin : — 

 Head and body 66 mm. ; tail 61 ; hind foot 14-5, 

 Skull — basilar length 13-7 ; interorbital breadth 3-4 ; breadth of 

 brain-case 9*3 ; palatilar length 8 ; diastema 4' 5 ; palatal foramina 

 3 ; length of upper molar series 3-1. 



* The type oi ussurieus has a hind foot 14 mm. in ength, not 12 as given in the 

 original description. 



