PLATE IX. 



Pertusaria pocillaria sp. nov. 



FIG. I. Portion of fruited thallus (X8)- c > CU P formed by the evacuation of the 

 asci. 



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



3. Vertical section of apothecium (.X96)- 



4. Asci and paraphyses (X 1 Sy). 



5. Spores (X375)- 



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

 (NO. 8o6.) 



