Fig. 75. 
Dumontia incrassata. A, two carpogonial branches, the upper representing a side branch of an auxiliary-cell filament. 
B, carpogonial branch; the carpogonium does not reach the third cell from the top. C, carpogonial branch and 
auxiliary-cell branch. D, carpogonial filament after fecundation; the fertilized carpogonium has fused together with 
the three uppermost cells of the carpogonial branch, has become very enlarged and formed sporogenous filaments. 
E, the fertilized carpogonium has fused with one or two cells of the carpogonial filament and has given rise to four 
sporogenous filaments. At right a four-celled auxiliary-cell filament; the auxiliary-cell after having fused with a 
sporogenous filament has produced a young gonimoblast. , F, the trichogyne of the unfertilized carpogonium contains 
two nuclei, while the ventral part contains no nucleus. The lowest or second cell from the base has fused with a 
sporogenous filament from another carpogonium. G, auxiliary-cell filament; the auxiliary cell has fused with a sporo- 
genous filament and produced a new sporogenous filament. H, auxiliary-cell filament with young cystocarp. J, trans- 
verse section of frond with ripe cystocarp. a, auxiliary cell. af, auxiliary-cell filament. s, sporogenous filament. 
t, trichogyne. A, B, D, E,G, H 380:1. C,F 610:1. J 220:1. 
En GE 
