LIST OF ILLUSTRATIONS 



PAGE 



Portrait of George John Romanes .... Frontispiece 

 Diagram of Prof. Weismann's Theories 43 



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



restiform bodies 118 



FlO. a. Old Irish Pig (after Richardson) 1 88 



FlO. 3. Skulls of Niata Ox and of Wild White Ox ... 193 

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



