ALTICOLA 307 



pencil very short and thin. Colour dark; rich 

 dark brown above. Auditory bullae small; 



cheek-teeth robust A. roylei Gray. 



a^. Under parts with an ochraceous wash. 



A . roylei roylei Gray. 

 [Kumaon (10,000-13,000 feet).] 

 6®. Under parts silvery-grey. 



A . roylei cautus Hinton. 

 Lahul (8500-9200 feet). 

 h\ Tail shorter (28-30% of head and body length), 

 wholly white or with a very faint brown tinge 

 above; better clothed, and with a long terminal 

 pencil. Colour pale; reddish- or yellowish-grey 

 above, white below .... A. albicaudaTTXie. 

 Baltistan (12,000 feet). 

 h. Tail completely clothed, its annulations concealed ; wholly 

 white; usually between 30 and 40% of head and body 

 length. Claws partly hidden by the long dorsal hairs of 

 the digits. 

 a*, m^ more complex (Fig. 91, la); auditory bullae very 

 large; anterior palatal foramina longer, terminating 

 behind between the tooth-rows. Colour pallid, yellowish- 

 brown above, white below; terminal pencil of tail 



about 13 mm. long A. phasma Miller. 



Kara Korum Mts. (9000-10,000 feet). 



b^. 7tt^ somewhat simpler (Fig. 91, 4-7); auditory bullae 



smaller; anterior palatal foramina shorter terminating 



behind in advance of the tooth-rows. Colour darker 



and greyer; terminal pencil of tail shorter, about 5 mm. 



long ^4. worthiiigloni IVIiller. 



a-. Under parts white .... A. tv. ivorthitigtoni ^liller. 

 Thian Shan Region (6000-9000 feet). 

 b'-. Under parts pale pinkish buff. 



a^. Skull and teeth smaller (condylo-basal length 25' 1 



mm.) A. IV. subluteus Thomas. 



Thian Shan, Semiretschcnsk. 

 b^. Skull and teeth larger (condylo-basal length to 



28-7 mm.) A. w. semicamts Al\en. 



Central Jlongolia. 

 B. m^ in adults with only two salient angles on the inner side. 

 Tail very short, rarely exceeding the hind-foot in length, 

 completely clothed, and wholly white. Palms and soles 

 more or less hairy between the pads; densely haired 

 behind. Claws usually concealed by long dorsal hairs of 

 digits. 

 a. m^ less reduced, its form most peculiar, the posterior loop 

 long and narrow and forming fully half the length 

 of the crouTi. Colour pallid, light yellowish-brown or 

 brownish-grey above, white below. 

 a^. Braincase small; auditory bullae less inflated. 



A. strarheyi Thomas. 

 E. Kashmir, W. Tibet (14,500-18,500 feet). 

 Everest (17,300 feet). 

 b^. Braincase larger and deeper; auditory bullae larger and 



more swollen .-1. ia»ta Barrett-Hamilton. 



W. Tibet (16,000-17,800 feet). 



