SPECIES OF MAMiMALIA. 



Icon. Horsfield, ZooL. Res. — F. Cuvier^ I. c. 

 Inhabits Sumatra. 



9. 5. 5. H. Agilis {the 2ici\ve Gibbon). Fur brown; back 

 yellowish ; forehead very low ; orbital arches very promi- 

 nent ; face of the male blue black, of the female brown. 



Hylobates agilis, F. Cuvier, Mam77i. lithog. Pithecus 

 agilis, Desm. Mamm. 532. 



Gibbon ounko, M.M. Diard and Duvancel. 

 Icon. F. Cuvier, Mamm. lithog. 

 Inhabits Sumatra. 



IV. Presbytis. — Eschscholts. Facial angle ^0° ; cheek- 

 pouches none ; callosities distinct ; tail long ; arms reaching 

 to the knees. 



10. 1. S. P. Mitrula (the Capped Monkey). Fur finely 

 curled, above of a bluish green colour, beneath grayish 

 white ; head crested, with a black line from the upper part 

 of the ears across the head. 



Presbytis mitrula, Eschscholtii, Kotzebue, Voyage of Dis- 

 covery, II, 353. 



Icon. Of the cranium and hands, I. c. 



Inhabits Sumatra. 



Obs. Length from head to rump one foot and a half; 

 tail two feet. Called Presbytis on account of its resem- 

 blance to an old woman with a cap on her head. 



VI. CoLOBus.— -GeofFroy*. Facial angle of 40=45°; 

 muzzle short; aiiterior hands destitute of thumbs ; tail very 

 long and thin; cheek pouches and callosities distinct. 



11. 1. S. C. polycomos (the peruque or full-bottom 



* It seems doubtful whether tliis £;cuus exist (hsliuf t from tlic Macacus, the 

 S. Silenusot Linuaeu'-, hut wc have the Huthorily ol GcoflVoy and others that 

 it docs. 

 7 



