TABLE OF CONTENTS 



PAGE 



Preface .......... v 



Introduction ........ , xiii 



Edentates or Toothless Animals ..... 9 



The Armadillos ........ 9 



Cetaceans . . . . ..... . 1 1 



Whales ......... 12 



Dolphins ......... 20 



Porpoises ......... 22 



Manatees and Dugongs ....... 26 



Ungulates or Hoofed Animals ...... 28 



Peccaries ......... 30 



Deer and Their Allies ...... 31 



Pronghorns ........ 54 



The Cattle ........ 57 



Rodents or Gnawing Animals ...... 71 



Rabbits and Hares ....... 73 



Pikas ....... .... 93 



Porcupines ......... 94 



Pocket Gophers ........ 96 



Pocket Mice ........ 99 



Jumping Mice ........ 102 



Rats, Mice and Lemmings ...... 105 



Meadow Mice, Lemmings and Muskrats . . . 107 



American Long-tailed Mice and Rats . . . 127 



Introduced Rats and Mice . . . . . 138 



vii 



