tYON] MAMMALS FROM KAN-SU, CHINA 137 



smaller, zygomatic width distinctly less, and audital bullae larger and 

 the depression of the cranium between cerebrum and cerebellum 

 more pronounced. 



Measurements. — External measurements of the type and an adult 

 female (Cat. Xo. 144,029, U. S. N. M.), taken in the flesh by col- 

 lector: Head and body, 152, 161 mm.; hind foot, 25, 26; ear from 

 crown, measured from dry skin by writer, 13, 14. Cranial measure- 

 ments of the type and Cat. Xo. 144,029 : Greatest length, 36.6, 34.3 ; 

 zygomatic width, 16.4, 16. 1 ; basal length, 30.3. 29.5 ; maxillary tooth- 

 row (alveoli), 7, 6.9; mandibular tooth-row (alveoli), y.2, 6.8. 



Specimens examined.- — Four adults and three young. 



Remarks. — Although I have been unable to compare OcJiotona 

 cansus directly with O. tibetana, an examination of the natural size 

 figure of the skull of the latter shows the two forms to be distinct. 

 The differences are too great to be accounted for by inaccuracy in 

 drawing. The length of hind foot in 0. tibetanus is given as 31 

 mm., while in 0. cansus it is only 25—26 mm. I fail to understand, 

 however, why the total length of 0. tibetanus is only 134 mm., while 

 that of O. cansus is between 150 and 160. It may possibly be ac- 

 counted for by Milne Edwards' measurement being taken from a 

 specimen in alcohol. The account of OcJiotona hodgsoni (Blyth) 

 given by Bonhote 1 shows that animal to be larger, reddish brown in- 

 stead of wood-brown in color, and upper surfaces of feet rufous 

 instead of buff v. 



1 Proc. Z06I. Soc, London, 1904, II, p. 218. 



