— 128 — 



Podospora copropMla. 



P. coprophila does not present any essential difference in its 

 development to the species just described. On the fig. 38 is shown 

 the spiral coiled ascogonium of this species. The nuclei in same are 

 very small (fig. 39) and therefor, as in P. anserina and P. setosa^ 

 one had to leave out the question of the cause, which produced 

 the lying in pairs of the nuclei in the ascogonium and the fornia- 

 tion of large and small nuclei. One can only ascertain опсетоге^ 

 that here also their fusion was never observed and the limit bet- 

 ween the two nuclei was always sharply outlined. The nuclei in 

 the ascogenous hyphae, which originate from several cells of the 

 ascogonium, have a distinct position in pairs. 



This species was also cultured by Woronin, who could not obtain 

 the asci fruiting of the fungus. He watched only the germination 

 of the spores and the formation of the picnidia and conidia. One 

 must confess that at first the culture of this fungus dit not succeed 

 by us also. One could only obtain numerous picnidia. But on re- 

 peating the experiment, the fungus began to fruit abundantly and 

 one could follow its development from the very beginning of the 

 formation of the ascogonium (fig. 43), to the full maturing of the 

 spores. It is, to regret that it v,'as not possible to trace the cause 

 of such different behaviour of the fungus. The conditions in which, 

 the culture was placed seemed to be quite the same the second 

 time as the first, and the operations produced did not differ in any 

 Avay, but the results were quite different. 



Sordaria flmicola. 



This form is found the oftenest. One can even affirm that, during 

 the three years of investigation, the horse-dung, brought to the 

 laboratory, was never free of the spores of this specia, indepen- 

 dently of the place and the time of gathering. And if one separates 

 in two the mycelium of Mucor or Pilobolus, which generally covers 

 already after four, five days the brought portion of horse-dung, 

 one can always hope to see many dark perithecia of already ma- 

 ture Sordaria. The abundance of its fruiting and the astonishing 

 rapidity of development of the perithecia, make Sordaria a most 



