10 OYLDENSTOLPE, ON A COLLECTION OF MAMMALS MADE IN EASTERN AND CENTRAL BORNEO. 



5. Nasalis larvatus Wurmb. 



Verh. Bat. Genoots. Vol. II, p. 144. 1784. 



No. 15. J 1 Toembang Maroewe, Central Borneo, Oct. 1915. — No. 13. J 1 Toembang Maroewe, Central 

 Borneo 23 /h> 1915. — No. 14. J* Toembang Maroewe, Central Borneo 21 /io 1915. — No. 16. $ Toembang 

 Maroewe, Central Borneo 2 %o 1915. — No. 17. J 1 Toembang Maroewe, Central Borneo s %o 1915. — No. 

 20. $ Toembang Maroewe, Central Borneo, Sept. 1915. — No. 25. $ Toembang Maroewe, Central Borneo 

 2G /io 1915. — No. 26. $ juv. Toembang Maroewe, Central Borneo 26 /io 1915. — No. 34. <$ Toembang 

 Maroewe, Central Borneo, Nov. 1915. — No. 35. j 1 odd skull witbout locality. — No. 36. $ (odd skull) 

 Toembang Maroewe, Central Borneo, Sept. 1915. — No. 9. <£ Kaboreau, Eastern Borneo 12 /i 1914. — J 1 

 adult witbout locality and skull. 



Besides their larger size the males of the Proboscis Monkey may always be 

 distinguished from the females by their longer nose and brighter colour. While in 

 the males the top of the head and the general colour of the upper parts of the body 

 are almost chestnut (brigthest on the head) these same parts in the females are 

 ochraceous washed with chestnut on the crovvn. The colour of the underparts is 

 also different in the two sexes. In the old males the underparts of the body together 

 with the sides of the head and neck, the chin and the throat are vinaceous cinnamon 

 (Ridgway pl. 29) becoming paler and more cinnamon buff on the belly. In the 

 females the lower breast and belly is nearest to dark olive buff (Ridgway pl. 40). 

 The white rump so evident in the males is brownish grey in the females though of 

 varying tint in different individuals. The young specimen in the present collection is 

 almost similar in colour to the adult females but the rump patch is bluish ashy 

 which colour is continued on the upper side of the tail, becoming broader towards the 

 tip. Lower parts of tail greyish white like the feet and inner side of the hindlegs. 

 According to Mr. Lumholtz the Proboscis Monkey is called »bakkhar» by the Dyaks. 



Skull measuremenl8 : 



C? 



No. 35 



d" 



=• 



ef 



No. 9 



No. 17 



No. 14 



132,4 



132,2 



140,0 



115,0 



108,2 



113,2 



94,2 



95,6 



101,5 



108,7 



104,1 



114,2 



90,1 



89,0 



93,0 



68,0 



62,4 



63,5 



10,n 



12,0 



11,2 



47,9 



44,1 



46,0 



72,2 



70,4 



75,3 



53,5 



51,3 



50,0 



25,7 



25,4 



23,5 



26,2 



24,4 



2*,o 



26,8 



23,2 



25,5 



29,5 



34,5 



37,0 



No 13 ;No. 34 No. 20 



9 

 No. 16 



$ 

 No 36 



9 



No. 23 



Greatest length of skull 



Condylobasal length 



Basicranial length • . . . 



Occipitonasal length 



Zygomatic width 



Greatest width of braineaee 



Least interorbital breadth 



Least postorbital breadth 



Greatest orbital breadth 



Breadth of planum nuchale 



Height of planum nuchale from foramen 



magnum 



Inner height of orbit 



Inner breadth of orbit 



Breadth across alveoles of canines . . 



138,4 



111,0 



100,0 



111,3 



89,5 



66,1 



12,2 



46,0 



74,4 



54,0 



26,2 

 25,7 

 28 8 

 32,3 



140,2 131,6 

 112,0 109,2 



100,0 

 109,5 ; 



90,8 



68,4 



10,2 



46,2 



72,2 



53,2 



94,6 

 103,8 

 88,0 

 65,0 

 10,3 

 44,2 

 74,0 

 48,5 



26,2 j 'i 9,0 



25,0 24,2 



24,6 25,6 



35,0 31,6 



114,6 

 90,0 

 79,2 

 94,6 

 77,8 

 63,4 

 7,7 

 46,0 

 63,5 

 46,0 



21,5 

 22,6 

 23,0 

 27,0 



114,5 

 90,0 ' 

 78,0 j 

 93,5 i 

 76,8 

 61,7 

 7,8 

 43,1 

 60,1 

 47,7 



110,1 

 83,0 

 72,1 

 91,7 

 76,1 

 64,6 

 9,1 

 45,9 

 62,0 

 46,6 



111,2 

 87,1 

 77,0 

 92,6 | 

 74,2 

 64,0 i 

 7,9 I 

 43,1 

 62,2 

 48,0 



20,0 20,1 18,5 



22,0 ' 21,3 22,8 



22,2 | 22,1 23,3 



25,0 I 24,0 24,1 



