PLATE IX. 



Pertusaria pocillaria sp. nov. 



FIG. I. Portion of fruited thallus (X8). c, cup formed by the evacuation of the 

 asci. 



2. Vertical section of thallus and apothecia (X24). 



3. Vertical section of apothecium (X9^)' 



4. Asci and paraphyses (X 187). 



5. Spores (X375)- 



The figures are drawn from specimens collected by Dr. Trelease at Farragut Bay. 

 (NO. 8o6a.) 



