40 OYLDENSTOLPE, ON A COLLECTION OF MAMMALS MADE IN EASTERN AND CENTRAL RORNEO 



Skull measurements . 



9 



d" 



No. 28 



No. 62 





22,0 



18,9 



17,0 



17,1 



17,o 



14,o 



13,8 



0,0 



0,5 



3.3 



3,0 



11,2 



11,1 



3,0 



2,7 



8,9 



8,8 



Greatest width of braincuse 



Least interorbital breadth 



Least postorbital breadth 



Length of naaals mesially 



Breadth of combined nasals anteriorly . 

 Breadth of combined nasals posteriorly 



Diastema 



Length of foramina incisiva 



Length of upper toothrow (alveoli) . . 



36. Nannosciurus exilis exilis Muller & Schlegel. 



Tijdschr, voor Natuur. Ges. en Physiol., vol. 5, 1838, p. 148. 



No. 13. £ Mandurao, Eastern Borneo 10 /i 1914. Head and body: 66 mm. Tail: 48 mm. Hindfoot 

 21 mm. Ear: 9 mm. — No. 11. $ Mandurao, Eastern Borneo 19 /i 1914. Head and body: 63 mm. Tail 

 44 mm. Hindfoot: 20 mm. Ear: 9 mm. — No. 19. J 1 Camp 4, Eastern Borneo 21 /i 1914. Head and body 

 75 mm. Tail: 56 mm. Hindfoot: 22 mm. Ear: 10 mm. — No. 100. ^ Long Pangian, Boelongean, Eastern 

 Borneo 5 A 1914. Head and body: 63 mm. Tail: 35 mm. Hindfoot: 21 mm. Ear: 9 mm. — No. 134. J 1 

 Pipoh, Boelongean, Eastern Borneo 1D /s 1914. Head and body: 68 mm. Tail: 46 mm. Hindfoot: 20 mm. 

 Ear: 9 mm. — No. 26. £ Toembang Maroewe, Central Borneo, sept. 1915. Hindfoot: 23 mm. (measured 

 in skin). — No. 9. <£ Toembang Maroewe, Central Borneo, Sept. 1915. 



In two of the specimens collected in January the head, neck and shoulders 

 are waslied witli cinnamon rufous and in one of these specimens this colour even 

 extends almost över the whole upper back. Under parts dusky grey, slightly washed 

 with rufous. The scrotum of the males are tinged with ochraceous. 



There is no difference whatever betvveen the specimens from Central Borneo 

 and those from the Eastern parts of the Island, except that in the former the 

 hindfoot is slightly longer. If there are any cranial differences is impossible to state 

 because the skulls of the Central Bornean specimens are totally smashed. 



Skull measurements : 



9 



No. 13 



9 



No. 14 



a" 

 No. 19 



No. 100 



No. 134 



Greatest length of skull 21,2 22,0 22,8 



Length from condylus to gnathion 18,0 19,7 20,0 



Basicranial length of skull 16,8 18,0 18,2 



Zygomatic width 12,3 13.0 13,2 



Greatest width of brainease 10,5 12,0 12, o 



Least interorbital width 8,9 8,5 9,6 



Length of nasals mesially j 0,3 6,8 6,5 



Diastema 4,1 4,7 4,5 



Length of upper toothrow (alveolij | 3,5 3,4 3,4 



22 7 

 20,0 

 18,4 



4,3 

 3,3 



22 2 



19,3 

 17.7 

 12,5 



11,6 



10,0 



5,8 

 4,3 

 3,-1 



