S1MIADJC. HYLOBATES. 



HYLOBATES. 



Teeth :— Incisors ?-? ; Canines j-^j ; Premolars ||; Molars 3 ~ ; =32. 



The Silvery Gibbon, or Wou-Wou. Hylohates lenciscus. 



Van der Hoeven, Verz. de Platen, pi. 19. fig. 13 (skull). — Handbuch 

 der Zoologie, p. 796. taf. 9. fig. 8 (skull), 1852-56. 



a. Skull. 



The Oungka. Hylobates agilis. 



Dahlbom, Zoologiska Studier, pi. 3. fig. 9 (clavicula), fig. 10 (ster- 

 num), 1857. 

 Pitkecus variegatus, Blainv., Ost. Atl. G. Pithecus, pi. 2 (skeleton). 



a. Skull. 



The Gibbon. Hylobates lar. 

 Buff on, Hist. Nat. xiv. pi. 6 (skeleton), p. 108. 



a. Skull. From the Zoological Society's Collection. 



b. Skull. Tenasserim. Presented by Professor Oldham. 

 e. Skull. From the Zoological Society's Collection. 



The Hoolock Gibbon. Hylobates hoolock. 



Martin, Nat. Hist, of Man and Monkeys, p. 438. fig. 275 (skull), 

 p. 442. 



a, b. Skull. From the Zoological Society's Collection. 



c. Skeleton (imperfect). From the Zoological Society's Collection. 

 *d. Skull. From the Zoological Society's Collection. 



The White-cheeked Gibbon. Hylobates leucogenys. 

 Martin, Nat. Hist, of Man and Monkeys, fig. 276 (skull), p. 445. 



PRESBYTES. 



Teeth : — Incisors ^ ; Canines |^ ; Premolars §=? ; Molars — 3 ; = 32. 



£—£ l-i 2—2 3-3 



The Chingkau. Presbytes cristatus. 



a. Skull. Java. 



b. Skull ; young. 



c. Skull. Sumatra. From the Zoological Society's Collection. 



d. Skull : young. 



