REMARKS ON THE PILOBOLIDAE 189 



Piloholus longipes. Of sixty- two sporangia twelve showed no 

 depressions, whilst in the other fifty the depressions in the form 

 of elongated, meandering, irregularly arranged furrows (Fig. 96) 

 varied from ten to twenty in number. Of seventy-five sporangia 

 derived from a pure culture only three or four small sporangia 



Fig. 96. — Pilobolus longipes. A and B, the upper convex surfaces of 

 two large dried discharged sporangia, produced by wild fruit- 

 bodie.«, each showing a pattern of irregular depressions or 

 furrows. Magnification, 100. 



could be found which possessed in their walls depressions that more 

 or less resembled the rounded depressions of P. Kleinii. 



From the special investigations on Pilobolus Kleinii and P. 

 longipes that have just been recorded it is clear that the pattern on 

 dried discharged sporangia, while fairly constant in its general 

 aspect for each species, is subject within each species to a large 

 amount of variation in detail. The typical pattern for any particular 

 species ought to be sought for in the larger sporangia rather than in 

 the smaller ones. 



