INTRODUCTION. 23 



to write new matter that would satisfy my 

 desire to come up to the standard of the 

 original chapters. However, it has been 

 done in the best manner possible at 

 present. The book as it now stands repre- 

 sents forty years' study of tropical nature 

 under very great difficulties. 



J. RODWAY. 



MUSEUM, GEORGETOWN, BRITISH GUIANA. 



