LIST OF ILLUSTRATIONS 



Portrait of George John Romanes .... Frontispiece 

 Diagram of Prof. Weismann's Theories 43 



FIG. I. Guinea pigs, showing gangrene of ears due to injury of 



restiform bodies Il8 



FIG. 2. Old Irish Pig (after Richardson) . . . . .188 

 FIG. 3. Skulls of Niata Ox and of Wild White Ox ... 192 

 FlG. 4. Lower teeth of Orang (after Tomes) .... 267 



