CEBIDZ. 37 
derately dilated behind. Claws compresséd. Nostrils.oblong; rather 
close below. Hair of crown woolly. 
_ Section B. TRICHIURA.. Tail hairy to the tip, not, or only, feebly, pre- 
hensile. 
Tribe III. Cesmva. Grinders 8.8; cutting-teeth vertical, in a regular 
series with the canines. Claws blunt. Lower jaw not dilated behind. 
Nostrils far apart. 
5. Cupus, Head large, Claws guttered. 
Tribe IV. CALLITRICHINA. Grinders } . 8s aapsaas vertical, in a 
regular series with the canines. Lower jaw dilated behind. ” Byes 
moderate, diurnal. Nostrils far apart. 
6. Sarmret. Head large, elongate; forehead well developed. 
7. CaLLitHRix. Head small, depressed ; forehead small. 
Tribe V. Nycotrerriecina. Grinders £. 8; ‘cutting-teeth vertical, in a 
regular series with the canines. Lower jaw dilated behind. Eyes very 
large, nocturnal. Nostrils close together, as in the old-world apes. 
8. NycripitHecus. Head large, rounded ; forehead slightly developed. 
Tribe VI. Prrnrcina, Grinders $.4; lower .cutting-teeth large, shelv- 
ing, converging, separate from the canines. Lower jaw not dilated 
behind, Fur harsh, elongate. Claws blunt. 
9, Prruxcia, Tail club-shaped. Hair of crown like a wig. Chin 
slightly bearded. 
Tribe VII Bracuyurina. Grinders £.%; lower cutting-teeth large, 
shelving, converging, separate from the canines. Lower jaw dilated 
‘behind. Fur soft, silky, Claws blunt. 
10, Curropotes. Tail elongate, club-shaped. Crown with long hair like 
awig. Chin large, bearded. Limbs short. 
11. OvaKania. Tail subcylindrical, short. Crown with short hairs, 
Chin scarcely bearded. Limbs elongate. 
Tribe VIII. Harauina. Grinders $.5; lower cutting-teeth vertical. 
Lower jaw not dilated behind. Thumbs developed, but never opposable 
to the fingers. 
* Lower cutting-teeth elongate, slender, linear, of the same size as the 
canines. 
12. Hapatz, Ears with a fan-like pencil of hairs on the inside of the 
conch, 
13. Iaccuus. Ears with a fan-like pencil of long hairs on forehead in 
front of the conch. 
14. Crpuetta., Ears small, naked, hid in the fur. 
15. Mico. Ears large, naked, exserted, without any pencil of hairs. 
** Lower cutting-teeth short, subtruncate ; lower canines large, pro- 
minent. 
16, Leonrorrrnecus. Head and face with long silky hair. 
17. CEpreus. Sides of the head naked; crown with a tuft of hairs. 
