in 
In its mode of growth this species resembles the species Ch. Dumontiæ and 
Ch. cytophaga described below. The germinating spore divides, as in these, into 
two equal cells giving rise to two creeping filaments growing out in opposite di- 
rections and giving off new creeping filaments which appear to be later confluent 
into a pseudoparenchymatous disc in the central part of the basal layer. Usually 
one erect filament is given off from each of the cells of the basal layer, the outer 
as well as the inner, 
and not rarely the 
same cell gives off 
two filaments, the 
one behindthe other 
(fig. 43 E, F). Most of 
the filaments attain 
only a small size 
and remain unbran- 
ched, but some of 
them grow out and 
become much bran- 
ched. The most vig- 
orous filaments are 
much and repeated- 
ly branched; usu- 
ally each cell bears 
one or two bran- 
ches, long filaments 
or branchlets, but 
there is no distinc- 
tion between these 
two kinds of bran- 
ches, as transi- 
tions between them 
frequently  occur. 
Fig. 43. When two branches 
Chantransia polyblasta. (From Hals). A—C, young plants seen from above. D, more 
developed plant seen from above. E, F, plants seen from the side with short erect are borne by the 
filaments. G, H, more developed, branched erect filaments, I, end of erect filament. Same cell, they are 
ie Tap ATES very often not oppo- 
site but placed near each other on the same side of the cell. In fig. 43 E, F the 
last cell of the creeping filament is seen to be somewhat raised above the sub- 
stratum and ends in a hair. Transitions between creeping and erect filaments thus 
appear to occur; however, I have never seen the transformation of a creeping filament 
into a true erect one. The cells are cylindrical, by ramification frequently a little 
broader at the upper end. The stellate chromatophore contains a distinct central 
pyrenoid. 
