14« 



which had not produced iinlheridia. The case represented in fig. 72 D goes lo prove 

 the correctness of this interpretation. 



The carpogenic filaments are, as stated hy Schmitz and Hauptfleisch (1896 

 p. 333), lateral on the assimilative filaments and consist usually of 3 cells, the lowest 

 of which is often wedge-shaped (flg. 71 D, F), 4-celled carpogenic filaments however 

 also occur (flg. 71 C). Only once have I seen a carpogenic filament terminal on a 

 vegetative filament which bore also a '2-celled lateral carpogenic filament (fig. 71 E). 

 After fertilization the carpogonium is not divided, as in Nemalion and Helminthora, 

 by a transverse wall into a staik- 



cell and an upper cell producing 

 the sporogenous filaments, but 

 it divides by an obli([ue wall 

 going from the upper side of the 



Fig. 72. 



llehninthodadia purpurea. A—C, ends of 

 assimilative fil.'iments willi clusters of an- 

 tliei idia. D. clieeked antliei idial brandies 

 wlilch have developed only very few an- 

 Iheridia. E, F, ends of filaments bearing 

 glolnilar cells, probably sterile antheridial 

 branchlets. A~D 5G0 : 1, E—F 350 : 1. 



Fig. 73. 



Helminlliorladia purpurea. Al fertilized carpogonium, still undivided 

 liut Willi (li\i<U(l nucleus. B . fertilized carpogonium divided by an 

 obli(lue wall. C, sin)ilar stage, the one daughter-cell appears about 

 to divide. 7J, more advanced stage. E, the sporogenous filaments 

 begin to grow out. F, median section of ripe cystocarp. A—D, F 350:1, 

 E : 1 



cell to the margin of the basal wall (fig. 73 Z?, C) and thereafter follows variously 

 orientated walls, giving as result a cell-complex growing out into numerous radia- 

 ting, branched sporogenous filaments, the end-cells of which produce carpospores. 

 The succession of the divisions in the carpogonium I have not been able to follow; 

 they seem to take place in such a manner that a number of peripheral cells are 

 cut off while a larger placentar cell remains in the centre (fig. 73 F, a). The spo- 

 rogenous filaments are rather long-celled, the mother-cells of the carpospores long 

 and narrow. After the discharge of the carpospore a new mother-cell may be pro- 

 duced by proliferation from the subterminal cell. At the time when the divisions 



