vi SYSTEMATIC INDEX. 



ORDER II. BRUTA. 



These have no front teeth in either jaw ; and the feet are armed 

 with strong hoof-like nails. 



4. Sloth tribe Have neither front nor canine teeth ; and the 



two anterior grinders longer than the rest. The body 



is covered with hair page 10 



Three-toed Sloth 11 



5. Ant-eater tribe. Have no teeth. The mouth is long and 



tubular; and the body hairy ib. 



Great Ant-eater 12 | Two-toed Ant-eater 12 



6. Platypus tribe. Have the mouth shaped like the bill of a 



duck ; and the feet webbed 13 



Duck-billed Platypus ib. 



7. Manis tribe. Have no teeth. The mouth is very small, 



and the body is covered with scales 14 



Long-tailed Manis ib. 



8. Armadillo tribe. Have grinders, but no canine or front 



teeth. The body is covered with a crustaceous shell. ... 15 

 Three-banded Armadillo . . 15 | Six banded Armadillo 16 



9. Rhinoceros tribe. Have a horn on the middle of the fore- 



head ; and three hoofs on each foot ib. 



Single-horned Rhinoceros . . 16 | Two -horned Rhinoceros .. 18 



10. Elephant tribe. Have tusks and grinders, but no front 

 teeth. The snout is lengthened into a flexible trunk. . . . ib. 



Elephant ib. 



11. Walrus tribe. Have tusks in the upper jaw. The lips 

 are doubled; and the hind legs stretch backward, and 

 form a kind of fin 22 



Arctic Walrus ib. 



ORDER III. FERjE. 



These have, in general, six front teeth in each jaw ; and a single 

 tusk, or canine tooth, on each side in both jaws. 



1 2. Seal tribe. Have six front teeth above and four below. 

 The feet are webbed 23 



Common Seal 23 | Ursine Seal 24 



Bottle-nosed Seal, or Sea-lion 25 



