241 



In this paper, free use has been made of North American Pyrenomy- 

 cetes by Ellis and Everhardt. The descriptions have been re-written to 

 suit the material at hand. Especially has it been found necessary to 

 revise the measurements of parts as seen under the microscope. The 

 author wishes also to make due acknowledgment to Prof. J. M. Van 

 Hook, of Indiana University for material and valuable assistance in the 

 preparation of this paper. 



Indiana University, 



Bloomington, Indiana. 



lf>— 496G 



