12 



PhotoinicrograpJis of Botanical Studies. 



3.— T.S. Female conceptacle, fucus vesiculosus. 



m^. 





Limiting tissue of thallus. 



Pr(jtective hairs. 



Oogonia in varicius stages of 



development. 

 iMouth of conceptacle. 



4. — Y.S. Apothecia, Parmelia parietina. 



Apothecia containing spores. 



Mycelium. 



Unicellular alga:. 

 ~ Rhizoides or root-hairs. 



