CONTENTS xi 
PART IT. 
CONCLUSION 
CHAPTER PAGE 
XLI. ALGAE AND BRYOPHYTA, 658 
XLII. EMBRYOGENY OF THE PTERIDOPHYTES, 663 
XLIII. THE VEGETATIVE SYSTEM OF VASCULAR PLANTS ANALYSED, 678 
XLIV. THE VASCULAR SKELETON,- 685 
XLV. THE SPORE-PRODUCING MEMBERS, j 692 
XLVI. HETEROSPORY AND THE SEED-HABIT, 703 
“ XLVII. RESULTS, PHYLETIC AND MORPHOLOGICAL, 709 
INDEX, 718 
