TABLE OF CONTENTS 



PACE 



Preface . . . .''.'. .".'.. . v 



Introduction . ; . 4 V . . . ; 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 . . . . . . ' . , ^ o 



Deer and Their Allies . ; . . . 31 



Pronghorns . 54 



The Cattle ... . . . ... 57 



Rodents or Gnawing Animals . . . . . 71 



Rabbits and Hares 7^ 



Pikas " . 92 



Porcupines 94 



Pocket Gophers 96 



Pocket Mice . . . . . . , . j 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 ... . . . 1 



