LIST OF ILLUSTRATIONS. XV 



FIG. PAGE 



70. Skull and Teeth of the Morse 266 



71. Skull and Teeth of the Porcupine 267 



72. Grinding Surfaces of the Upper and Lower Molars of Horse . 271 



73. Section of Skull and Teeth of Elephant . . . .274 



74. Molar Teeth of Elephant and Siberian Mammoth . . . 278 



75. Deciduous and Permanent Teeth of the Hog .... 310 



76. Deciduous and Permanent Teeth, Human, set. 7 . . . 312 



