CEBID..—PITHECTA, 27 
Siamiris ustus. 
Isid. Geoff; Voy. de la Vénus, p. 96, pl. 2. figs. 4, 5 (skull), 1855. 
OUAKARIA. 
Teeth :—Incisors 7= ss ; Canines 3 Premolars = — ; Molars = +336, 
Ouakaria calvus. 
Cervical vertebrea.............. 7 
Dorsal eo. 4 sc ais acd eevee ne Goce wae 13 
PMMD AP hast See ere aces we as 6 
WACKAl <5 Gc wos aka matdaceoneaes 3 
Catadal si cise iceacnn case 4 ore wae 18 
*a, Skull. Near the River Amazon. Presented by M. E. Bourcier. 
b. Skeleton. From Mr. Bartlett’s Collection. 
Ouakaria spixii. 
Cervical vertebree.............. 7 
DOrsal. 4% ook deen, oa doe eat ome des 13 
umbar ic newwews oe dan ecens 6 
DACTAL,- Shi ere seicg Sandy nar hows Coles 3 
Caudal ........ 0... eee eee 18 
a. Skeleton. Presented by the Zoological Society. 
seneaysin| 
Teeth :—Incisors 2 pat ; Canines = — ; Premolars 55 ; Molars = fer 2. =36. 
The WuisxereD Yarre. Pithecia pogonias. 
*q, Skull: very young. From Mr. Bartlett’s Collection, 
The Yarxe. Pithecia irrorata. 
*a, Skull. Rio Negro. From Mr. Stevens’s Collection. 
_ Pithecia ——? 
a. Skull. Rio Negro. From Mr. Stevens’s Collection. 
Pithecia albicans. 
*qa, Skull. Upper Amazons. 
NYCTIPITHECUS. 
3-3 
Teeth: :—Incisors = 22. Canines = 5 ; Premolars = = ; Molars 5 ;=36. 
