MAMMALIA. 433 



* With the tail annulated. 

 Jacchus vulgaris — The Striated Monkey. — Plate VI. fig. 

 6. — Described, vol. II. p. 4il. 



** Tail without aniiulations. 



Jacchus argentatus — The Fair Monkey. — Plate VI. fig. 'S. 



— Head small and round; face and hands vivid scarlet; body 

 and limbs covered with long snowy-white shining hairs, of sil- 

 very brightness ; nil longer than the body, deep chestnut 

 Somewhat larger than the striated monkey. 



Sub- Genus 2 Tamarin. — Ge.offroy. 



The four upper cutting teeth are contiguous, the intermediate 

 somewhat broader than the lateral ones ; four under incisors in- 

 clined, contiguous ; ears large ; forehead produced. 



Jacchus oedipus — Red. Tailed Monkey. — Plate V**. fig. 4. 



— Upper parts of the body pale reddish -brown, under parts and 

 limbs white ; face black ; hair on the head white, long, loose, 

 and spreading over the shoulders ; lower parts of the back, and 

 upper half of the tail deep orange -red ; rest of the tail black ; 

 claws small and sharp. Size of a large squirrel. Inhabits 

 Guiana. 



Family II. — Lemures. 



Form approaching to the quadrupeds who walk on all fours ; 

 upper and under cutting teeth varying both in form and situa- 

 tion ; nostrils at the point of the muzzle ; posterior extremities 

 longer than the anterior ; first finger of the hind feet next the 

 thumb, with a sharp nail ; with or without a tail, which is not 

 prehensile when it exists ; from two to four pectoral mammae. 



Genus 16. — Indris. — Lacepede. 



Generic Character Incisory teeth*; canines j-J ; grinders 



; total 32 : the superior incisory teeth united in pairs, the 

 external inferior ones broadest ; grinders with a tuberculatod 

 crown ; head long, triangular ; the ears short and rounded ; two 

 pectoral mammaa; posterior members rather long, terminated 

 by a sharp reflected nail; the toe of the hind feet is larger than 

 the others. 



Indris brevicaudalus. — The Shout-Tailkd Indris. — Plate 

 IV. 2 Q 



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