Yendo: CORALLINZ VER. Tek 
4 and 5. Chetlosporum MacMillant. 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 
Chetlosporum californicum (Dcne.). 
3. Corallina vancouveriensts f. typica. 
PratrrT IV;- 
1. Corallina vancouvertensts f. densa. 
2. A high-tide form of Corallina vancouveriensis. 
3. Corallina aculeata. 
Pirate DV Ei. 
Figures 1 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 xX BB. 
Figure 3. Chezlosporum californicum (Dcne.). 
A portion of branch showing the conceptacles. The scars of broken 
conceptacles are seen as deep excavations. % Ca. 3. 
Figures 4-8. Chetlosporum frondescens (Post. et Rupr.). 
4. £. typica; a portion of frond. xX ca. 4. 
Be Re a fertile branch. X ca. 5. 
6 and 6a. f. polymorpha; portion of frond. xX ca. 3%. 
ma a fertile branch. xX ca. 4. 
8. Cross section of a fertile articulus of f. ¢yfzca. The dotted line 
indicates the boundary between the cortical part and the medullary. 
Figures 9-10. Chezlosporum plantusculum (Kiitz.). 
g. f. zormalis. X Ca. 5. 
Ment. regulars. X ca. 5. 
Figures 11-14. Chetlosporum MacMillant. 
11-12. Portions of the fertile branches showing pyriform concep- 
tacles taking places of the pinnules (11), 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. 
