CEBID.K. — BBACHYTELES. 21 



The Brown Spider Monkey. Ateles hybridus. 

 *a. Skull. South America. 



The Grey Waita. Ateles geoffroyii. 



Cervical vertebrae 7 



Dorsal 14 



Lumbar 4 



Sacral 3 



Caudal 33 



*a. Skull. Caraccas. From M. Salle's Collection. 



b. Skeleton. 



*c. Skull. Presented by Capt. Kellett and Lieut. Wood. 



The Black-handed Waita. Ateles melanochir. 

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



BRACHYTELES. 



Teeth : — Incisors || ; Canines j^j ; Premolars || ; Molars |=| ;=36. 



The Miriki. Brachyteles hypoxanthus. 



Brachyteles macrotarsus, Spix, Sim. Bras. pi. 38. fig. G (skull). 



Cervical vertebras 7 



Dorsal 13 



Lumbar 5 



Sacral 3 



Caudal 26 (imperfect). 



a. Skeleton. From Mr. Brandt's Collection. 



b, c. Skulls. 



The Thumbed Miriki. Brachyteles hemidactylus. 

 *a. Skull. South America. 



The Five-fingered Miriki. Brachyteles arachnoides. 

 Blainv., Ost. Atl. G. Cebua, pi. 5 (skull). . 



LAGOTHRIX. 



Teeth : — Incisors || ; Canines t| ; Premolars ~ ; Molars ^ ;=36. 



