CEBID^. 37 



derately dilated behind. Claws compressed. Nostrik oblong, rather 

 close below. Hair of crown woolly. 



Section B. Trichiura. Tail hairy to the tip, not, or only feebly, pre- 

 hensile. 



Tribe III. Cebina. Grimlers f . f ; cuttiny-teeth vertical, in a reyular 

 series loith the canines. Claws blunt. Lower jaw not dilated behind, 

 ^^ostrils far apart. 



5. Cebus. Head large. Claws guttered. 



Tribe IV. Callitrichina. Grinders f .f ; cuttiny-feeth vertical, iti a 

 reyular series with (he canines. Lotver jniv dilated behind. Eyes 

 moderate, diurnal. Nostrils far apaH. 



6. Saimiri. Head large, elongate ; forehead well developed. 



7. Callithrts. Head small, depressed ; forehead small. 



Tribe V. Nyctipithecina. Grinders f . f ; cuttiny-teeth vertical, in a 

 reyular series with the canines. Lmverjaw dilated behind. Eyes very 

 larye, nocturnal. Nostrils close toyether, as in the old-world apes. 



8. NvcTiPiTHEcrs. Head large, rounded ; forehead slightly developed. 



Tribe VI. Pithecina. Grinders f . | ; lo2ver cuttiny-teeth larye, shelv- 

 iny, converyiny, separate from the canines. Lower jaio not dilated 

 behind. Fur harsh, elunyate. Claws blunt. 



9. PiTHECiA. Tail club-shaped. Hair of crown like a wig. Chin 



slightly bearded. 



Tribe Vn. Brachyubina. Grinders f . f ; loiver cuttiny-teeth larye, 

 shelviny, converyiny, separate from the canines. Lower jaw dilated 

 behind. Fur soft, silky. Claws blunt. 



10. Chiropotes. Tail elongate, club-shaped. Crown with long hair like 



a wig. Chin large, bearded. Limbs short. 



11. OuAKARiA. Tail subcylindrical, short. Crown \^•ith short hairs. 

 Chin scarcely bearded. Limbs elongate. 



Tribe VIII. Hapalina. Grinders y . f ; lower cuttiny-teeth vertical. 

 Lower jaio not dilated behind. Thumbs developed, but never opposable 

 to thejinyers. 



* Lower cuttiny-teeth elonyate, slender, linear, of the same size as the 

 canines. 



12. Hapale. Ears with a fan-like pencil of hau's on the inside of the 



conch. 



13. Iacchus. Ears with a fan-like pencil of long hairs on forehead in 



front of the conch. 



14. Cebuella. Ears small, naked, hid in tlio fur. 



15. Mico. Ears large, naked, e.xserted, ^vithout any pencil of hairs. 



•• Lower cuttiny-teeth i<hort, subtruncate ; lower canines larye, pro- 

 minent. 



16. Leontopituecus. Head and face with long silky hair. 



1 7. (Edipus. Sides of the head naked ; crown with a tuft of hairs. 



