BIOLOGICAL 

 STUDIES AND ADDRESSES. 



READY. 



I. EVOLUTION OF MAMMALIAN MOLAR 

 TEETH. 



JN PREPARATION. 

 II. ADAPTIVE RADIATION OF MAMMALS. 



III. EVOLUTION OF THE VERTEBRATES. 



IV. RECTIGRADATIONS IN EVOLUTION. 

 V. SOME GREAT NATURALISTS. 



VI. SEVEN FACTORS OF EDUCATION. 



