Sjiecits and Sub.specieti o/' Mon/ct >/s. 2T,\ 



"wliitisli from tips of hairs ; \v'^h piilcr silvory clral)-j^rev, tlie 

 outcT cdj^c over kiicos hrortuish ; fcrt blackish lu'owii ; tail 

 silvery f^rcy on basal half, {^radiiiiij into brounish '^rcy lor the 

 reinaininjjj portion to tip; chin, throat, and ab lonicn white; 

 rest of under i)arts, chest, aud inner side of limbs dark drab- 

 {jrcy. 



Measurements. Total length 12r)0 mm. ; tail MOO ; foot 15'J 

 (skin). Sknll : total h-njith 90; ocfipito-nasal length SSo ; 

 intertemporal wiilth (M'Z; length of nasals 10'2; j)alatal 

 lengtli 2o7 ; length of iip|)er molar series 25 ; length of 

 upper canines l.)3 ; length of mandible (J55 ; length of 

 lower molar series IJI'I. 



Tiipe in British Museum, no. Gl. 10. 8. 1. 



Tltis race resembles P. crepuscula, but is easily distin- 

 guished by its brown head aud the lighter more silvery hue 

 of the fur. 



1 have great pleasure in naming this race after Mr. R. C. 

 Wroutrhton, -well known for his pa|)ers in conjunction with 

 Mr. Old held Thomas on African aud Asiatic mammals. 



Presbytis lan'ia, sp. n. 



Tyi e locality. Churabi Valley, Thibet. 



Gen. char. Hair long, thiciv, woolly, inclined to gather 

 in masses, especially on upper back and shoulders ; size 

 large. 



Colour. Head and hind-neck yellowish white; sides of 

 licad jjurc white ; upper part of back aud shoulders sepia ; 

 flanks and upper part of arms pale brownish grey ; upper 

 parts of legs paler, more silvery grey ; hands black ; chin, 

 throat, under parts of body, and inner side of limbs yellowish 

 white; tail above like bick, paler, more whitish beneath. 



Mvusureuients. Size about the same as P. schistucea. 

 Skull : total length 125'3; oceipito-nasal length 102'7 ; inter- 

 temporal uidtli oO'H ; breadth of brain-case 73"5 ; hensel 

 88*3; zygomatic width ]02o ; length of nasals 12 ; palatal 

 length 4U'3 ; length of upper molar scries 4J;*-i. 



Type in British Museum, no. 0. 7. 16. 1. 



The unique ty()e of this new form was lately received by 

 the British Museum, through the Bombay Natural History 

 Society, from Chumbi, Thibet. It is a female, with the 

 feet and most of the tail wanting. It is remarkable for its 

 woolly coat, quite unlike the pelage of F. schistacea. It 

 probably represents a species dwelling among the higher 

 mountains to the north of the llinuilaya, whose coat has 

 been modified to enable the animals to successfully withstand 



