44 



of the trichogyne, as has been found to "be the case in 

 Batr acho speriaum (DAVIS, '96), ITeinalion (V/eiFE, '04), and 

 Polys iphonia ( YAivIAJTOUCHI , »06b), has not "been determined. 

 The trichOE^me ireaLCnes d. length of 35-40 A*<> 

 and ■becomes quite slender, with a diajneter of about 1 K- 

 In the mature trichogyne several granules, which stain like 

 chroms.tin, are to be observed (fig. 85 ) . 



The mature trichogyne is straight or somewhat curved 

 and sometimes , though not alvmys, slightly swollen at the 

 free end. 



Before and during the forma.tion of the carpogenic 

 branch, noteworthy changes take place in the auxilary cell. 

 The cytoplasm becomes denser and the nucleus nearest the 

 centre of the cell increases very greatly in size. Before 

 the differentiation of the aiuciliari/- cell, the nuclei may 

 average 1.5 m/ in diameter. I-Fhen the carpogenic branch is 

 fully formed, the central nucleus of the auxiliary cell may 

 reach a diameter of 6.5 Av , A similar change ma,y take 

 place in one of the nuclei of the other peripheral cells. 



The structure of the mature procarp is as follows: 

 (figs, 79,80). The broad, flat ba.sal cell bears on its 

 upper border the central cell, which is also broad and ra- 

 ther flat. The central cell bears usually tiiree peripheral 



