KONGL. SV. VET. AKADEMIENS HANDL. BAND. 20. N:0 5. 343 



Monostroma crispatum. Fig. 11—13. 



Fig. 11. Habit-fignre. Vi- 

 » 12. Transverse section of the uppermost part of the frond. *'"'/]. 

 » 13. Longitudinal section of the lower part of the frond, '""'/i- 



PLATE 29. 

 Monostroma angicava. 



Fig. 1. Two specimens issuing from the same fastening surface, one (downwards to the right) young, the 

 other full-grown bearing zoospores. Vi- 



» 2. Lowest part of the frond, seen superficially. '*''Vi- 



» 3. Transverse section of the same. *"%. 



» 4. Part of the vegetative portion of the frond, seen superficially. *""/]■ 



» 5. Transverse section of the same. *"%. 



» 6. Part of the zoosporiferous portion of the frond. *"%. 



» 7 . Transverse section of the same. *'"'/i. 



PLATE 30. 

 Monostroma cylindraoeum. 



Fig. 1. Full-grown specimen bearing zoospores. Vi- 



» 2. Lowest part of the frond, seen superficially. *'"'/i- 



» 3. Transverse section of the same. '"%• 



» 4. Part of the vegetative portion of the frond, seen superficially, """'/i- 



» 5. Transverse section of the same. *'"'/i. 



» 6. Part of the zoosporiferous portion of the frond. *''7r 



» 7. Transverse section of the same. '"%. 



PLATE 31. 

 Enteromorpha micrococca f. subsalsa. Fig. 1—3. 



Fig. 1. Part of a specimen. '%. 

 1) 2. Part of the wall of the frond, seen superficially. *''"/i- 

 » 3. Transverse section of the same. *""'/i. 



Ohsetopliora pellicula. Fig. 4—7. 



Fig. 4, Prostrate branch-system with branches issuing on one side. '"%• 



» 5. Ascending branch-system. *"%. 



» 6. Tip of branch bearing hairs. *"%. 



» 7. Part of branch with zoosporangia. ''•'"/i- 



