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 Lons-tailed Mice and Rats . . . 127 



Introduced Rats and Mice 1^8 



vii 



