THE SOUND MADE BY FUNGUS GUNS 



339 



me by Dr. W. H. Long, is only attained when the segments have 

 become well reflexed (Fig. 173). Professor I. M. Lewis, formerly 



Fig. 173. — Urnula geaster. Two fruit-bodies fully expanded, seoa from above. 

 This is the puffing stage. Found on roots of a dead elm, Ulmus crassifolia, at 

 Denton, Texas, U.S.A., and photographed by W. H. Long. Natural size. 



