7S 



sexual pli-mt differs strikingly from t.jiat of the norrual 

 tetraspore inotlier cells. In the majority of cases, the nu- 

 cleus divides (v/liet;ier "by mitosis or amitosis I hove not 

 yet been able to deterniin^^ and cleavage begins at the 

 periphery (fig. 149) , The cleavage furrows do not advance 

 far into the body of the mother cell. The surface of the 

 cell begins to shov/ irregular v/rinkling, and degenerative 

 changes set in similar to those described for certain tet- 

 raspore mother cells. The number of nuclei in cells in 

 v/hich cleavage furrows begin is usually 4-3, of which some 

 are very much larger tlian the rest (fig. 149). 



One case deserves sjiecial mention. Sixteen nuclei 

 lie scattered in the cell, which shows no trace of the for- 

 mation of cleavage furrows (fig. 150) , The ./hole cell pre- 

 sents the appearance of a germinating spore. It would seem 

 that here the eell corresponding to the tetraspore mother 

 cell behaves as a monospore; tjiough whether such a cell 

 ever produces a norms.l plant is uncertain. 



The Ciiromoso):ie -hi story of the nuclei of the cells 

 just described has not yet been determined. 



