xv CONTENTS 



V 



PAOh 



ON THE FORMATION OF COAL [1870] , 137 



(A Lecture delivered at the Philosophical 

 Institute, Bradford.) 



VI 



ON THE BORDER TERRITORY BETWEEN THE ANIMAL AND 



THE VEGETABLE KINGDOMS [1876] 162 



(A Friday evening Lecture delivered at, the 

 Royal Institution.) 



VII 



A LOBSTER? OR, THE STUDY OF ZOOLOGY [1861] .... 19fl 



(A Lecture delivered at the South Kensington 

 Museum.) 



VIII 



BIOGENESIS AND ABIOGENESIS [1870] 229 



(The Presidential Address to the Meeting of 

 the British Association for the Advance- 

 ment of Science at Liverpool.) 



IX 



GEOLOGICAL CONTEMPORANEITY AND PERSISTENT TY?ES 



OF LIFE [1862] 272 



(Address to the Geological Society on behalf 

 of the President by one of the Secretaries.) 



