642 



COMPENDIUM OF GENERIC DISTINCTIONS. 



Genus. — Hylobates. 



Head, throat, and limbs, resembling Siamanga, except that the 

 fingers of the hand are all free. Many systematic naturalists con- 

 sider the two genera to be really one, and that the Siamanga is 

 only a species of Hylobates. 



Habitat. — Malacca. 



Genus. — Presbytes. 



Teeth. — Last molar of lower jaw with five tubercles. 

 Head. — Muzzle very slightly produced — rudiments of cheek- 

 pouches. 

 Feet. — Elongated — Thumb of fore-feet very short. 

 Tail.— Extremely long, often surpassing the body. 

 Habitat. — India, China, etc. Only known in Asia. 



Genus. — Colobus. 

 Teeth \ 



Head Y As in Presbytes. 

 Tail ) 



Feet. — Thumb of fore-feet altogether wanting, or only repre- 

 sented by a small tubercle. 

 Habitat. — Western Africa. 



Genus. — Cercopitliecus. 



Teeth. — The last molar teeth of the lower jaw furnished with 

 four tubercles. 

 Head. — Cheek-pouches large — Face rather long and rounded. 

 Tail. — Long, sometimes longer than the body. 

 Habitat. — Spread over the greater part of Africa. 



Genus. — Cercocebus. 



Teeth. — The last molar teeth of the lower jaw furnished with 

 five tubercles, the others with four tubercles. 



Head. — Muzzle more elongated than in Cercopithecus — Cheek- 

 pouches large. 



Tail — Long, and not tufted. 



Habitat. — Africa. 



Genus. — Macacus. 



Similar to Cercocebus, excepting that the tail is very varied in 

 length, several species being almost destitute of the member, and 

 others possessing it very slightly developed. 



Habitat. —India, Sumatra, Japan, and the North of Africa. 



Genus. — Silenus. 



Similar to the genus Macacus, excepting the tail, which is fur- 

 nished with a conspicuous tuft of hair. 

 Habitat. — India. 



Genus. — Cynocephalus. 



Teeth. — Last molar of lower jaw furnished with one or two 

 accessory tubercles, the others with four tubercles. 



Head. — Face lengthened into a conspicuous snout, and abruptly 

 terminated, the nostrils being placed at the extremity— Cheek- 

 pouches large. 



Tail.— Moderately long, and inserted high. In the Gelada it is 

 furnished with a tuft, a peculiarity which has induced some 

 writers to place the animal in a different genus. 



Habitat. — Africa. 



Genus.— Papio. 



Similar to Cynocephalus, excepting that the tail is extremely 

 small, and set nearly perpendicularly to the line of the back. 

 Habitat.— Africa. 



Family. — Cebid^e. 



Nostrils very wide, separated by a broad septum, opening lat- 

 erally. Tail long, and in most instances prehensile. Thumb of 

 fore-hands totally distinct from the fingers. Cheek-pouches 

 absent. Molar teeth comparatively small. 



Genus. — A teles. 



Head. — Rounded and small. 



Limbs. — Loug and slender — Thumb of fore-hands wanting. 



Tail. — Prehensile, naked below towards the tip. 

 Fur. — Long, stiff, and rather harsh. 

 Habitat. — Brazils. 



Genus. — Brachyteles. 

 Head as in Ateles. 



Limbs. — Thumb of fore-hands extremely small. 

 Tail. — Prehensile, and naked below towards the tip. 

 Fur.— Woolly. 

 Habitat. — Tropical America. 



Genus. — Mycetes. 



Head. — Rather pyramidal — A large beard on the cheeks and 

 chin — Throat furnished with large, resonant pouch, formed by 

 expansion of the hyoid bone. 



Limbs. — Fore-feet five-fingered. 



Tall. — Naked below towards the tip. 



Habitat. — Tropical America. 



Genus. — Cebus. 

 Head. — Rounded. 



Tail. — Long, and entirely covered with hair. 

 Habitat. — Tropical America. 



Genus. — Callithrix. 



Teeth. — Incisors straight, the two middle being broad — Canines 

 short, hardly exceeding incisors. 

 Tail. — Slender and rounded. 

 Habitat. — Brazils. 



Genus. — Brachy urus. 



Teeth. — Incisors rather oblique, the lower being long — Canines 

 large and stout — Molars small. 

 Tail. — Very hairy, shorter than body. 

 Habitat. — G uiana. 



Genus. — Pithecia. 



Teeth. — Like preceding genus. 

 Tail. — Equalling body in length. 

 Habitat. — Brazils. 



Genus. — Nyctipithecus. 



Teeth.— Lower incisors rather obliquely pointing forwards, two 

 middle upper incisors broad — Canines moderate. 



Head. — Ears small, and partially buried in hair — Eyes large, 

 orbits very large. 



Limbs. — Hind-feet longer than fore-feet. 



Tail. — Longer than body. 



Habitat. — Brazils. 



Genus. — Jacchus. 



Teeth. — Lower incisors long and rounded, rather convex exter- 

 nally — Pramolars with one tubercle in the outer margin — Molars 

 with two tubercles. 



Head. — Face short and blunt — nostrils wide. 



Tail. — Long, and thickly furred. 



Habitat. — B razils. 



Family. — Lem urid^e. 



Teeth.— Upper incisors, 2 — 2, generally set in pairs, and sepa- 

 rated from the canines by a small space ; lower incisors, either 

 2 — 2 or 1 — 1, often slightly projecting. 



Limbs. — All the feet with five fingers, the fourth being the 

 largest — Hind-feet larger than fore-feet — All the nails flat, except- 

 ing that of the second finger, which is narrow and curved. 



Teeth.— I. 



C. 



Genus 

 1—1 



-Lemur. 



3—3 3-3 



, P. , M. 



1' 3—3 3—3 



36. 



Head.— Eyes large, and set closely together — Ears short and 

 rounded. 

 Limbs.— First finger of fore-feet extremely short. 

 Tail.— Rather short. 

 Habitat . — Madagascar. 



