CONTENTS 



CHAPTER PAGE 



XVII. THE ESTABLISHMENT OF A FREE-LIVING SPOROPHYTE, 218 



XVIII. EVIDENCE FROM PALAEOPHYTOLOGY, - 227 



XIX. AMPLIFICATION AND REDUCTION, - 233 



XX. SUMMARY OF THE WORKING HYPOTHESIS, 244 



PART II. 



DETAILED STATEMENT OF FACTS 



INTRODUCTION, 255 



XXI. BRYOPHYTA, (i.) HEPATICAE, - 257 



XXII. BRYOPHYTA, (n.) Musci, - 272 



XXIII. LVCOPODIALES GENERAL MORPHOLOGY, 288 



XXIV. LYCOPODIALES SPORE-PRODUCING MEMBERS, 311 

 XXV. LYCOPODIALES COMPARATIVE ANATOMY, 328 



XXVI. LYCOPODIALES EMBRYOLOGY AND COMPARATIVE SUMMARY, 340 



XXVI I. EQUISETALES, - 366 



XXVIII. SPHENOPHYLLALES, - 39 8 



XXIX. SUMMARY FOR SPORANGIOPHORIC PTERIDOPHYTES, 423 



XXX. OPHIOGLOSSALES, - 43 



XXXI. COMPARATIVE DISCUSSION OF OPHIOGLOSSALES, - 476 



XXXII. FlLICALES BOTRYOPTERIDEAE, 495 



XXXIII. FILICALES MARATTIACEAE, 505 



XXXIV. FILICALES OSMUNDACEAE, 530 

 XXXV. FILICALES SCHIZAEACEAE AND MARSILIACEAE, 542 



XXXVI. FILICALES GLEICHENIACEAE AND MATONINEAE, - 553 



XXXVII. FILICALES LOXSOMACEAE AND HYMENOPHYLLACEAE, - 570 



XXXVIII. FILICALES THYRSOPTERIDEAE, DICKSONIEAE, DENNSTAED- 



TIINAE, CYATHEAE AND SALVINIACEAE, 589 



XXXIX. FILICALES MIXTAE, 612 



XL. COMPARISON OF THE FILICALES, - 624 



