728 On neio Eodenls from Sze-chwan. 



Hah. Kama Song, between Nag-cliu-ka ( = Ko-kou) and 

 Ta-tsien-lu, W. Sze-chwan. 



TTjpe. Male. B.M. no. 11. 10.3.6. Original number 4. 

 Collected 21st May, 1911, and presented by Capt. F. M. 

 J3ailey. 



Tibetan name " Chu-lo." 



Tliis is the first example of the remarkable genus Myo- 

 sjjalax to be found in Sze-chwan, and it is therefore probably 

 very local in distribution. Its nearest geoo-raphical ally is 

 il/. cansus of Tao-chou, Kan-su, some 400 kilometres to the 

 northward, and it is also most nearly allied to that animal 

 zoologically, but may be distinguished by its hairy feet (that 

 species having them nearly naked), its shorter tail, and its 

 more complicated m^. 



Ochotona roylei cMnensis, subs p. n. 



Allied to true roylei and to " nepaleyisis,^' but greyer. 

 Nasals longer. 



General colour, in winter pelage, very similar to that of 

 0. roylei and nepalerisis, but clearer and paler grey, and 

 entirely without the rufous tinge nearly invariably found on 

 the head and flanks in that animal. Subterminal rings on 

 the body-hairs almost white, without buffy suffusion. Tips 

 of belly-hairs greyish white, not buffy or drab. Ears not 

 especially large, metentote greyish with pale brown edge. 

 Upper surface of hands and feet greyish white, with scarcely 

 a trace of buffy tinge. 



Of the summer pelage, two small patches are to be found 

 on the specimen. One, behind the ear, is pale ochraceous, 

 much paler than the warm ochraceous-rufous of the summer 

 ear-patches o£ 0. roylei. The other patch is on the flank, 

 and again differs from the corresponding fur of 0. roylei by 

 its paler colour, as indicated by the whitish subterminal rings 

 to the hairs. 



Skull, on the whole, very like that of 0. roylei, but the 

 nasals are longer and narrower, and the bullai are rather 

 smaller. Two well-marked interorbital vacuities present in 

 the type. 



Dimensions of the type : — 



Head and body 180; hind foot 32; ear 30. 



Skull: greatest length 46"5 ; condylo-incisive length 44*3 ; 

 greatest breadth 23 ; nasals 15*7 X5'6 ; interorbital breadth 

 5'5; breadth of brain-case 18*3; palatal foramina 12'8; 

 upper molar series (alveoli) 8"6. 



Ilab. Yara-tsa-ga, near Ta-tsien-lu, Sze-chwan. 13,000'. 



