studies in the development of certain species of 

 the Sordariaceae. 



by 



S. Satina. 



(With Plates I and IL) 



The group of Fungi Sphaeriales, although it has a very widely- 

 spread propagation and a great number of representatives, yet has 

 been very little investigated from the embryological point of Aiew. 

 While the development of other groups has been thoroughly stu- 

 died and investigated in detail, Sphaeriales have been in greater 

 part passed over. 



Most of the studies belong to the years 60 and 80, when micro- 

 scopical technic was л^егу slightly developed and many questions 

 could not be resolved, because some of them did not then exist 

 and could not even be raised. 



The slight knowledge we have of the Sphaeriales indicates, that 

 though among the representatives ot this group, you find some 

 with developed sexual cells, most of them do not possess such 

 cells, and the ascogonia more often are some what modified. There 

 are even cases of complete reduction of the sexual cells. For in- 

 stance Ceratostoma (Nichols 1896) presents a form with antheri- 

 dium not always developed. In the Teichosporella (Nichols 1896) 

 the antheridium is in the rudimentary stage. One can observe the 

 complete reduction of the male sexual cells in the Chaetomium. 

 The thin thread, Avhich developes generally next to the ascogonium, 

 is not an antheridium and must be only considered as an ordinary 



