1908.] MAMMALS FROM NORTHERN CHINA. 983. 



Size even smaller than in 0. cansa. General coloui- biown, 

 rather darker than Ridgway's " broccoli-brown," a lighter patch 

 across the nape. Under surface rather lighter, soiled cream-bnflF, 

 a more ochraceous-bufly area down the centre of the belly ; the 

 slaty bases to the hairs showing through ; sides of neck more 

 tawny. Ears blackish grey with white edges. Upper surface of 

 hands and feet cream-buff, their thickly furred jjalms and soles 

 slaty brownish. 



Skull most like that of 0. cansa, as figured by Lyon *, but the 

 upper outline is more convex, the nasals are longer and narrower, 

 the palatal foramina are more widely open, and the bulla? are 

 markedly smaller. 



Dimensions of the type, an adult female, measured in the 

 flesh :— 



Head and body 140 mm. ; hind foot 27 ; ear 18. 



Skull — greatest length 36*4 mm. ; basilar length 29 ; greatest 

 breadth 17; nasals 11 "8x4; interorbital breadth 4; bieadth of 

 brain-case 14 ; height of crown from alveolus of m" 10' 7 ; diastema 

 8 ; palatal foramina 8'8 X 4'3 ; diagonal length of bullfe 9'2 ;. 

 length of upper tooth-series (alveoli) 6' 7. 



Hah. and Ty2)e as above. 



This little Pika belongs to the O.piosilla group, and is no doubts 

 most nearly allied to Mr. Lyon's 0. cansa, from Kan-su, of which 

 the Museum possesses a specimen from the Province of Sze-chuen. 

 It differs, however, in the skull- characters above detailed, and 

 clearly cannot be referred to it. 



" The single specimen was taken by Mr. Sowerby in a wood upon 

 an abrupt hillside, where this, and probably another, had its. 

 burrow. The burrows, which were long and intricate, were 

 subsequently dug up without another specimen being found. 

 Examination showed No. 1979 to be an adult female, with the 

 uterus indicating that young had recently been bom, and the- 

 mammary glands secreting." — M. P. A . 



* Smiths. Misc. Coll. 1. pi. xv., 1907. 



