478 The Botanical Gazette. [November, 
high an authority, it seems within the bounds of possibility 
that he may have been misled as to the presence of anther- 
ozoids by the extensive variations in size exhibited by the 
zoospores in certain instances (fig. 14), while the writer must 
confess that he has himself been several times misled as to 
the presence of oospores by the encystment of secondary 
sporangia within the empty primary sporangium, which some- 
tim der unf bl liti The presence of uni- 
ciliate zoospores (which are perhaps not invariably produced in 
this genus) can hardly be considered very significant in view 
of the fact that such zoospores are known to occur in other 
genera, even were it not true that in at least one species of 
Monoblepharis (MZ. fasciculata), if not in all, biciliate zoo- 
spores are normally produced. 
In other respects the genus bears no resemblance to Mon- 
oblepharis in appearance or mode of growth, and is well de- 
fined through the correlation of successively proliferous spo- 
rangia with a habit corresponding essentially to that which dis- 
tinguishes the order LEPTOMITACE& (APODYE# Fischer), 
namely the segmentation of its hyphe through the presence 
of successive constrictions, each corresponding to a pseudo- 
septum formed by a deposit of cellulin (?) which nearly closes 
the passage from one segment to another except for a central 
perforation through which the protoplasm of adjacent seg- 
ments may usually be seen to be continuous. This segmen- 
tation, however, although as a rule so conspicuous a feature 
in G. stliguaeformis, is sometimes almost wholly absent from, 
or at least greatly obscured in, the common and very variable 
species which I have called G. polymorpha. The ‘‘cellulin rings 
in this species are sometimes unassociated with any marke 
constriction and are sparingly distributed, while in other in- 
stances the segmentation is as pronounced as in G. siliguae- 
Jormis, involving the entire vegetative body when the plant 
is short in habit, or often confined for the most part, as in fig. 
TI, to terminal groups of branchlets which are borne on more 
or less undifferentiated and sparingly pseudo-septate filaments. 
The zoosporangia in both species are in general similarly 
shaped, though much shorter, stouter and smaller in G. po7- 
morpha, tapering from a more or less inflated basal portion to 
the narrow tip which becomes terminally perforate for the 
emission of the zoospores. The sporangia may be once to 
several times proliferous and in G. polymorpha specimens are 
