— 109 — 



into a whole line of short cells. The latter are entwined by the 

 neighbouring hyphae; and form a spherical interlacing of cells — the 

 perithecium, which matures lengthens and forms asci with spores 

 and paraphyses. At a certain stage of development in the center 

 of the perithecium one can notice several larger cells with nume- 

 rous nuclei. The investigator states that a direct connection of the 

 latter with the cells of the ascogonium he described, could not 

 be defined. 



The development of the perithecium in the Sporormia intermedia 

 proceeds as follows: the cell of the hyphae, as other cells of the 

 mycelium containing 5 — 6 nuclei, takes the shape of a barrel and 

 is divided by cross and longitudinal walls. This division forms a 

 group of cells, each with one nucleus, which little by little takes 

 a spherical shape. In the centre one can distinguish several larger 

 cells, with two nuclei each. After some time this spherical forma- 

 tion changes, that is, somewhat lengthens and in the cavity, which 

 it forms, appears a whole group of asci and paraphyses. Though 

 Dangeard thinks one must look on the barrelshaped swollen cell, 

 which gives the beginning to the whole interlacing, as the ascogo- 

 nium of the Sporormia, yet he does not insist upon this and thinks 

 it possible that in tlîis case the larger cells with two nuclei, which 

 differentiated in the centre of the spherical body, may be the asco- 

 gonium. At any rate the origin of the ascogenous hyphae has also 

 remained undefined in this species. 



The fruit bodies of the Sporormia minima, in Zukal's researches, 

 develope from spherical sklerocia, which can remain in a state of 

 repose from 6 to 8 weeks. The sklerocium under favorable condi- 

 tions for growth, takes larger dimentions, lengthens and at last 

 takes the form of an ordinary perithecium. Inside the latter appears 

 a cavity. Part of the cells, lying at the bottom of this cavity, 

 produces thin, extremely shining, ascogenous hyphae, at the 

 ends of which develope asci. The author supposes that the pe- 

 rithecium can develope in. another manner, without forming the 

 sklerocia. 



Lewis (1911) in liis study of the Pleurage treats only the deve- 

 lopment of the asci of this fungus. 



The study of Wolf (1912) concerning the Podospora anserina 

 treats particularly of the question of the development of the spores 



