MAMMALIA. 
115 
and pointed; grinders cylindrical; head small, muzzle truncated, 
neck short; nostrils at the extremity of the muzzle; fore legs 
longer than the hind ones, with two or three toes furnished with 
strong nails ; fur thick, harsh, and long ; intestines short; no 
csecum ; stomach membranous. 
Brady pus tridactylus. —The Three-Toed Sloth. 
Plate XX. fig. 8. 
Fur gray, coarse, usually spotted on the back with brown or 
white; all the feet with three long curved nails ; soles of the 
feet covered with hair. Size of a fox. Inhabits South Ame¬ 
rica. 
This is the type of F. Cuvier’s genus Adieus. 
Genus 2.—Megatherium. — Cuvier. 
Fossil. 
Generic Character .—No incisors or canine teeth, grinders *-£} 
total 16. 
Megatherium Cuvieri. — Grinders with transverse furrows on 
their crowns. Body twelve feet long. Found fossil in Para¬ 
guay, South America. 
No living species of this genus have been discovered. 
Tribe II. —Effodientia, or Digging Edentata. 
Muzzle generally elongated ; with grinders only, or destitute 
of teeth. 
Genus 3 .— Dasypus.— Linnaeus. 
Generic Character _No incisory teeth, or \; no canines : 
teeth varying exceedingly in the dentary formula ; some having 
28, while they extend in others to 68; these teeth are cylindri¬ 
cal and separate, without enamel on the inner side. Head long, 
mouth and eyes small; tongue partially extensible; body en¬ 
veloped in shelly plates, which also cover the upper part of the 
head, and entire tail, with moveable transverse bends between 
