xii CONTENTS 



22. FOSSIL FUNGI 474 



Geological time, 474. Age of fossil fungi, 477. The 

 nature of fossilized fungi, 478. Preparation of fossils for 

 study, 479. Classification of fossil fungi, 479. Fossil 

 mycorrhizae, 487. Implications, 488. 



AUTHOR INDEX 491 



SUBJECT INDEX 502 



