KUNGL. SV. VET. AKADEMIENS HANDLINGAR. BAND 60 NIO 6. 7 



capacity of 105 ccm. and a semiadult female 93 ccm. While the immature male 

 specimen mentioned above has a braiu capacity of 108 ccm. an immature female 

 of practically the same age only measures 95 ccm., thus considerably more than 

 that of the fully adult female. It therefore seems that the brain capacity of 

 the young specimens is greater than that of the adults, a case which may be de- 

 clared by the different shape of the skull in young age. The walls of the braincase 

 also become thicker by age and gives less room for the brain. 



2. Presbytis frontata Muller. 



Tijdschr. voor Natuorl, Gesch. en Pliysiol.. vol. 5, 1838. p. 136. 



No. 130. $ Long Palabar, Boelongean. Eastern Borneo - 1 .-, 1914. Hcad and body: 502 mm. Tail: 

 792 mm. Hindfoot: 179 mm. Ear: 30 mm. — No. 137. $ Long Palabar. Boelongean, Eastern Bonieo 

 21 /u 1914. Head and body: 465 mm. Tail: 719 mm. Hindfoot: 169 mm. Ear: 29 mm. — No. 31. § 

 Toembang Maroewe, Central Borneo 1 fii 1915 'skull löst). ■ — No. 20. J 1 Toembang Maroewe, Central Borneo, 

 Sept. 1915. — No. 30. $ iinm. Toembang Maroewe, Central Borneo 7" 1915. — No. 1!). Toembang 



Maroewe. Central Borneo. Sept. 1915. — Tbree odd skulls witbout skins (a. b, c). 



Mr. Lumholtz obtained two females at Long Palabar, Eastern Borneo, and 

 four specimens at Toembang Maroewe in Central Borneo. The Eastern specimens 

 are perfectly similar to those from the interiör parts of the island. The general co- 

 lour above is sepia brown, becoming blackish brown at the base of the tail. Arms 

 and legs pure black. Crown of head together with the erect crest and the sides of 

 the face also blackish. Tail blackish brown at base above; the remainder of the tail 

 blackish grey, though somewhat browner below. Chin and lower cheeks greyish; 

 rest of underparts like the upper back though less clothed with hairs. According to 

 Mr. Lumholtz the Dyaks call this monkey »Boxi». 



Skull measuremcnts . 



? 



No. 136 



? 

 No. 137 



ef 

 No. 20 



9 



No. 19 



No. si 



No. b 



93,8 



88,5 



94,0 



90,9 



93,2 



95,0 



71,0 



71,2 



67,2 



65,9 



70,2 



71,3 



61,0 



58,5 



59.3 



58,9 



60,5 



61,5 



82.1 



78,0 



82,6 



79.8 



78,8 



80,2 



68,2 



68,1 



68,5 



66,4 



67,3 



69,5 



55,8 



54,2 



59,1 



55,2 



53,0 



57,2 



7,2 



6,1 



6,8 



6,1 



7,1 



7,2 



46,7 



46,0 



47,9 



43,8 



44,2 



46,5 



33,5 



32,0 



31,3 



30,5 



30,0 



29,0 



25,4 



25,5 



22,8 



23,0 



23,0 



23,7 



29,2 



29,6 



29,0 



27,0 



27,8 



28,7 



30,5 



28,6 



28,0 



31,3 



28.1 



29,6 



Greatest length of skull 



Condylobasal length of skull .... 



Basicranial length of skull 



Occipitonasal length 



Zygomatie width 



Greatest width of braincase .... 



Least interorbital width 



Least postorbital width 



Length of palate from henselion . . 

 Length of upper molar series . . . 

 Distance from front of canine to 

 back of last upper molar .... 

 Length of lower molar series 



