60 



posed. The connection of tlie st^.lk cell ■..itij the vegeta- 

 tive cell and also with tlie tetraspore mother cells is of 

 the upual t^'pe. On the side toward tlie sta,lk cell, the 

 cytoplasm of tlie mother cell is produced into a rather nar- 

 rov/ strand, \7hich meets a similar strand from the stalk 

 cell at the point where the callus-like plugs are develop- 

 ed (fig. 116). 



It sometimes happens t}iat the stalk cell produces lat- 

 erally a tuhtile-r process that curves up around the mother 

 cells cJid resemhles iri s,ppea,rance an involucral ray (fig. 

 117) . This recalls the condition in Griffithsia "barhata 

 and other species, in v/Iiich the tetraspores c'j:'e "borne lat- 

 erally on short involucrate reimuli • 



The tetraspore mother cell increases in si^'.e, the nu- 

 cleus showing corresponding enlargement. The cytoplasm he- 

 gins to shov« nuuierous small vacuoles betv;een the rather 

 dense cytoplasm surrounding the nucleus and that lying in 

 the periphery of the cell. 



The "behavior of tlie nucleolus during the period of en- 

 largement of the nucleus is interesting. As the nucleolus 

 increases in mass, it fragments into several rounded "bodies 

 of various sizes (fig. 113) . This process of fragmentation 

 continues until from 12 to 14 rounded masses of cliromatin 



