47 



"* 



grows upwards, while from the lower endo- 



phytic filaments growing downwards are 



produced (Figs. 44, 45 c and d). The last 



mentioned filaments grow downwards round 



the assimilating filaments of the Liagora 



upon which the spore has germinated. 



They do not penetrate into the cells of 



the host plant but only into the mucilage 



and chalk incrustation found between the 



filaments. 



The main filament arising from the 



germinating spore remains in most of the 



specimens undivided in the basal part 



(Fig. 45 a), but specimens were found in 



which a single or few branches were given 



off from near the base. In some of the 



more adult specimens erect filaments were 



found growing up from cells in the des- 



cending filaments (Fig. 44). On one occa- 



sion a descending filament was found 



growing out from a cell near the base , 



of the erect filament (Fig. 44). The cells a, habit of erect, ramified 



in these are about 8-11,, broad and their 



length about 35/,<. 



When the erect filaments have grown 



long enough to become free of the Liagora 



they begin to branch more freely. 



The branches issue from the upper end of 

 each cell mostly in an uniseriate manner; these 

 branches bear again branches arranged secundly. 

 Towards their apex the branches are undivided 

 tapering somewhat becoming about 8 [j> thick, at 

 the same time the chromatophores are not so 

 well developed. 



The chromatophore is parietal (Figs. 44, 46) 

 with a large pyrenoid. 



The sporangia are broad oval and mostly 

 pedicellate (Figs. 45 a, b, Fig. 46), placed upon 



snor t secund branchlets being seriately arranged 

 tium comptum . -j * xi i_ rfi 



nov. spec. Part upon the upper, inner side of the branches. [ he 



of a filament branchlets are as a rule one-celled and bear 

 with sporangia. . . c -i 



(About 400 i) mostly a single sometimes two sporangia. Sessile 



sporangia, c and d, bases 



O : ( 1; c 

 'i50: l).' 



