Yendo: CORALLINE: VER.K. 721 



4 and 5. Cheilosporum MacAIillani. In figure 4 wart-like con- 

 ceptacles as well as pyriform ones are to be found on the same branch. 



PLATE LIV. 



1. Corallina officinalis L. var. chilensis Kiitz 



2. Cheilosporum calif ornicum (Dene.). 



3. Corallina Vancouver lens is f. typica. 



PLATE LV. 



1. Corallina vancouveriensis f. densa. 



2. A high-tide form of Corallina Vancouver iensis. 



3. Corallina aculeata. 



PLATE LVI. 

 Figures i and 2. Amphiroa tuberculosa Endl. 



1. Diagrammatic figure of the longitudinal section of an articulus 

 showing four conceptacles, three of which are cut in meridional direc- 

 tion, the remaining one in crosswise, x ca. 15. 



2. A conceptacle cut in meridional direction showing the tetra- 

 sporangia. Zeiss 2 x BB. 



Figure 3. Cheilosporum californicum (Dene.). 

 A portion of branch showing the conceptacles. The scars of broken 

 conceptacles are seen as deep excavations, x ca. 3. 



Figures 4-8. Cheilosporum frondescens (Post, et Rupr. ). 



4. f. typica; a portion of frond, x ca. 4. 



5. " a fertile branch. x ca. 5. 



6 and 6a. f. polymorpha; portion of frond, x ca. 3]^. 



7. " a fertile branch. x ca. 4. 



8. Cross section of a fertile articulus of f. typica. The dotted line 

 indicates the boundary between the cortical part and the medullary. 



Figures 910. Cheilosporum planiusculum (Kiitz.). 



9. f. normalis. X ca. 5. 



10. f. regularis. X ca. 5. 



Figures 1114. Cheilosporum MacMillani. 



ii-i2. Portions of the fertile branches showing pyriform concep- 

 tacles taking places of the pinnules (n), or one or more immersed 

 in the pinnules (12). X ca. 2. 



13. Portions of a fertile branch, showing wart-like conceptacles, 

 one of them are found inserted at the apex of a pinnule, x ca. 2. 



14. Meridional section of a pyriform conceptacle, showing an 

 antheridium : the granular mass in the cavity is an aggregation of 

 spermatozoids. Zeiss 2 x BB. 



