PLATE 11 



Pseudulvella prostrata (Gardner) S. and G. 

 Fig. 1. Showing a small section of the margin of the thallus on the surface 

 of Iridaca lamdnarioides. 



Fig. 2. A vertical section of fig. 1, perpendicular to tlie long diameter of 

 the filaments of Ulvella: the drawing is imperfect, it should show a common enclos- 

 ing cuticle. 



Endophyton ramosuvi Gardner 



Fig. 3. Showing the narrow filaments within the central part of the host, 

 Iridaea laminarioides, terminating in sporangia at the surface. 

 Fig. 4. Showing pieces of irregularly shaped filaments. 



Pseudodietyon geniculatum Gardner 



Fig. 5. A part of a thallus showing a few terminal filaments penetrating 

 among the cortical cells of Laminaria Sinclairii. 



Fig. 6. A cross section of fig. 5, showing terminal sporangia on short, erect 

 filaments. 



All highly magnified. 



This plate is from Gardner, New Chlorophyceae from California, 1909, pp. 371- 

 376, pi. 14. 



[330] 



