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. TEspecially 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. 
16—4966 
