352 INTRODUCTION TO THE STUDY OF FUNGI 



himself, as thoroughly aud completely as possible, every 

 organism which he acquires in his own selected group, and 

 endeavour to ascertain all that is possible of its life-history. 

 The whole history of one species, worked out with persever- 

 ance and intelligence, will present the key to a knowledge of 

 many kindred species, and always prove to be a valuable 

 contribution to science, when the names of species are 

 changed or forgotten. 



