6 PREFA< 



I. Many kinds of animal-, which still live, 



i the beginning of the Earth 9 ! 

 or t 



II. . such as Trilo- 

 turs, endured on the Earth 



long gv varied in form and struc- 

 ture, and l" . leaving no 

 surv 



life which now exists on the Earth 



SUn life known from 



which have undergone substantially no 



I they became known in the 



They ted now with groups, 



like the Mammalia, which are cha 



ty of mammal on!- StruCtUH 



the S not unlike that which the ancient 



at on before they became extinct. 



rs which vary rapidly last f( 



short tin. 



I have USed SOme scientific name- of tl 



Is in tl t the 1 



St identification for 



.. -men, I be « ha 

 i anima I of living mei 



to theif tical km 



icd by 

 them m the pit, 



such i writh nan 



ma, 



li. I 



