43 



6. Caulerpa brachypus Harv. ; Fig. 15-17. 



Fig. 15. Portion of plant, profusely branching and proliferating surculus from the 



surface of a leafy frond ; nat. size. 

 Fig. 16. Portion of plant, showing dichotomous ramification of leafy frond and younger 



ones ; nat. size. 

 Fig. 17. One of leafy frond, showing crenulated margin ; nat. size. 



7. Prionitis patens ; Sp. nov. Fig. 18-20. 



Fig. 18. Portion of frond, bearing cystocarps ; nat. size. 



Fig. 19. Pieces of branch bearing tetrasporic sori ; slightly mag'*. 



Fig. 20. Portion of cross-section of the frond ; highly mag rf . 



8. Amansia japoniea (Holmes) ; Fig. 21-22. 



Fig. 21. One of the sterile frond, detached from the stem ; nat. size. 

 Fig. 22. Portion of branch, bearing stichidia ; nat. size. 



9. Chlanidote decumbensa ; Sp. nov. Fig. 23-25. 



Fig. 23. Fronds in nat. size; the right-hand one showing the upper surface; and the 



left-hand, the lower. 

 Fig. 24. Portion of frond seen from the upper surface, bearing sporangia ; -~ . 

 Fig. 25. Cross-section of the frond ; *>-* . 



10. Peyssonnelia caulifera; Sp. nov. Fig. 26-30. 



Fig. 26. Frond bearing sori of tetraspores, seen from the upper surface ; nat. size. 



Fig. 27. Frond, viewed from the under surface ; nat. size. 



Fig. 28. Section cut through a tetrasporic sorus ; -*° . 



Fig. 29. Neucleus; ~r . 



Fig. 30. Cross-section of the frond ; —^ . 



11. Pachydictyon coriaceum (Holmes.) Fig. 31-34. 



Fig. 31. Terminal portion of frond, bearing tetrasporic sori; nat. size. 



Fig. 32. The same, bearing sori of oospores ; nat. size. 



Fig. 33. Longitudinal section of frond, showing the cortical layer; -^f- . 



Fig. 34. Cross-section of the same ; - --*- . 



