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



Monostroma crispatum. Fig. 11—13. 



Fig. 11. Habit-ligure. Vi- 

 » 12. Transverse section of the uppevmost pavt of tlie frond. **'%. 

 » 13. Longitiulinal section of the lower part of the frond. *"''/'i. 



PLATE 29. 

 Monostroma angicava. 



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

 other fuU-grown bearing zoospores. Vi- 



» 2. Lowest part of the frond, seen superficially. *"%. 



» 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. *"%. 



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



PLATE 30. 

 Monostroma cylindraceum. 



Fig. 1. Full-grown specimen bearing zoospores. V]- 



» 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. '"'"/j. 



)> 5. Transverse section of the same. *''*'/r 



» 6. Part of the zoosporiferous portion of the frond. ''"Vi- 



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



PLATE 31. 

 Enteromorpha micrococoa f. subsalsa. Fig. 1- 



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

 » 2. Pavt of the wall of the frond, seen superficially. *"%. 

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



Chsetophora pellicula. Fig. 4—7. 



Fig. 4. Prostrate branch-system vvith branches issuing on one side. '""'/i. 



» 5. Ascending branch-system. """'/i. 



» G. Tip of branch bearing hairs. *'"'/i. 



» 7. Part of branch with zoosporangia. *"%• 



