Plate n. 



Figs. 1-8. Ishige Ohamnrai. 



1. Frond of tlio foliose type ; one of the broadest fronds in onr 

 collections. The ramification is somewhat irregular in this 

 specimen owing to injnries in many parts of the frond. 



2. Frond of the foliose type with ahnormal foliose branches on <nie 

 of its segments. 



3. Frond of the filiform tyju' with almornial foliose branches on 

 one of its segments. 



4. Cross-section of a frond of the filiform type through an insc^r- 

 tion point of two abnormal foliose branches, a, filiform frond ; 

 h, basal ])ortion of a foliose branch ; c, the swollen part at the 

 insertion of the foliose branches, ca. x 15. 



5. Longitudinal section of an apex of a foliose frond. x IGô. 



6. A ]iart of longitudinal section of a frond of thc^ foliose type ; 

 about the middle portion of a frond. x 1C5. 



7. A part of cross section of a frond of the filiform ty])e ; about 

 the middle portion of a frond. x 165. 



8. Cross seciion of a frond of the foliose type to show a crypto- 

 stoma. X 285. 



Figs. 9-12. Cy!=itop]iyllu7n crafff^ipes J. Ag. 



9. Basal portion of a well grown individual. 



10. Apical portion of the axial stem with basal i)arts of incrassate 

 branches. 



11. Lateral branches, one of which is fertile. The end marked with x 

 is to be connected below to the [)art with the same mark in the 

 preceding figure. 



12. Basal region of a branch with a sterile lat-eral branch. 

 Figs. 13-16. Cj/fitojjhyUum hakodatense. 



13. A young axial stem with many "fusiform" branches, some of 

 which have been cleared away. 



14. A young lateral branch growing from the swollen side of a 

 fusiform branch. Tiie part marked with ^ is to be connected to 

 the part with the same mark in the prececling figure. 



15. A Ç fertile lateral branch. 



16. Ç fertile ranmlets with fully developed receptacles. 



