KUNGL. SV. VET. AKADEMIENS HANDLINGAR. BAND 60. N:0 6. 9 



The brain capacity has been measured by means of hemp seed since fissura 

 orbitalis etc. has been closed with some cotton. Unfortunately I ha ve only been 

 able to measure three specimens, one male and two females. These three specimens 

 are all fullgrown and of practically the same age. To count from the material at 

 hand there seems to be no difference whatever between the capacity of the brain 

 case of the males and that of the females. Thus the females mesure 75 and 70 ccm. 

 respectively while the male measures 75 ccm. 



4. Presbytis hosei hosei Thomas. 



Proc. Zool. Soc. London 1889, p. 159, pl. 16. 



No. 6. J 1 Kaboreau, Eastern Borneo 10 /i 1914. Head and body: 523 mm. Tail: 728 mm. Hindfoot: 

 168 mm. Ear: 27 mm. — No. 80. $ Kaboreau, Eastern Borneo 6 /3 1914 (skull only). 



In the collection there is only a single male specimen and an odd skull of a 

 female from the same locality. The male agrees vvell with the original description 

 of this beautiful Monkey. The general colour is hoary grey, but the crest as well 

 as the central part of the crown and the nape are glossy black, like the eyebrows 

 and a few hairs round the orbits. Forehead, sides of the crown and neck, cheeks, 

 chin and front of neck pure white. Underparts of body, chest and inner sides of 

 limbs as far down as the middle of the forearm and of the lower leg also pure 

 white, continuous with the white chin and throat. Tail like the back, though rather 

 more grey when seen from below. 



Hose's Monkey is apparently a lowland form, though also met with on the 

 mountains. It seems to be generally distributed throughout the whole Island. A 

 near allied form, Presbytis hosei eoeretti Thos., inhabits the higher mountains of 

 Sarawak and Northern Borneo. It differs from P. hosei hosei in having a blackish 

 stripe runni ng from the eye to the ear, and is only to be considered as a sub- 

 specific race of P. hosei. 



Skull measurements (the measurements in pharenthesis are those of the female 

 specimen in the present collection). Greatest length of skull: 97, o (96.i); condylo- 

 basal length: 72 : o (74, o); basicranial length: 63,5 (64, i); occipitonasal length: 80.2 

 (81,3); zygomatic width : 68,6 (69,o); greatest breadth of braincase: 56.8 (51,9); least 

 interorbital width: 7,2 (8,6); least postorbital width: 45. o (43,o) length of palate from 

 henselion: 31 2 (33,0); length of upper toothrow from front of canine to back of m 3 

 (alveoli): 31,2 (28.3); length of upper molar series (alveoli): 24 : 3 (24. o); length of 

 lower molar series: 29,3 (29,o) mm.; capacity of brain-cavity : 68 (55) ccm. 



Kungl. Sv. Vet, Akad. Handl. Band 60. N:o 6. 



