PLATE 1-i 



Bryopsis plumosa (Huds.) Ag. 



Fig. 1. Diagrammatic illustration of a whole plant showing the method of 

 branching. X 1. 



Fig. 2. A sketch of a branch showing the arrangement, tlie relative length 

 and the constriction of the bases of the pinnules. X 40. 



Halioystis ovalis (Lyngb.) Aresch. 

 Fig. 3. A habit sketch of a whole plant except the rhizoidal base. X 2. 



EnteromorpJia tubulosa Kuetz. 

 Fig. 4. A portion of a small frond showing the linear arrangement of cells. 

 X 250. 



Fig. 5. A section of a frond. X 250. 



Percursaria percursa (Ag.) Eosenv. 

 Fig. 6. A portion of a frond showing one row of cells at one end and two 

 rows at the other. X 250. 



Enteromorpha compressa (L.) Grev. 



Fig. 7. A vertical section through the frond. X 250. 

 Fig. 8. A surface view. X 250. 



Chnetomorpha aerea (Dillw.) Kuetz. 



Fig. 9. A group of young plants showing long basal cells with rhizoids. 

 X 35. 



Figs. 10, 11. Sketches showing different ages of the cells in vegetative 

 stages. X 35. 



Monostroma sostericoJa Tildeu 



Fig. 12. A surface view. X 500. 



Fig. 13. A vertical section. X 500. 



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