210 MONOGRAPH OF THE LABOULBENIACE^. 
sin<rle " antlieridia,! cell/' or a group of such cells, the latter of a single naked or thin- 
walled cell. 
If we separate the genera of Laboulbeniacea3, on the basis above outlined, into 
forms with endogenous and those with exogenous antherozoids, it will be found that 
it is only in two aquatic genera that the forms included in the first-mentioned cate- 
gory occur: Zodiomyces and Ceratomyces being the only instances in which this type 
has been definitely observed. In general the antheridial branches are not highly 
differentiated even in the more typical instances; while were the demonstration of 
r 
the existence of male elements of this type dependent on the data aflbrded by the less 
well-marked examples, one might be inclined to doubt the presence of any sexuality 
in siwh cases, despite the presence of a well-developed trichogyne. In Zodiomyces, 
however, the antherozoids are produced in the form of buds which arise from the tips 
of short special branches (Plate XXIII, figs. 21-23) which assume a rod-like form and 
m 
eventually fall from their atta'chment. These bodies have a definite wall and seem to 
be sought by the tip of the trichogyne in a fashion to which reference will be made 
below. A second 
found in Ceratomyces rostratus, fr 
theridial branches of which are developed rods of definite form and size, which 
become separated and adhere to the trichogyne. In this instance the rods are formed 
successively from a definite point at the distal end of the fertile cells of the anthe- 
ridial branch (Plate XXIY, figs. 23-24), each rod usually becoming detached from its 
point of origin before its successor has begun to form. In other species of the genus, 
however, these bodies are not so clearly differentiated, and seem to be replaced by 
slender, often long, filaments which eventually break up into rods that are presum- 
ably functional as antherozoids. The adherence of the antherozoids to the mother- 
cell, or to one another, as in the last 
render fertilization morft pprfm'n • 
^ 
as soon as 
two instances mentioned, may be assumed to 
since it is evident that were such bodies separated. 
ey were mature, from a plant growing, as in the p 
ted and rapidly swimming host, the chances of 
adhering to the trichogyne would be reduced to a minimum. In" view of the fact 
this separation does not seem to take place at once, and that the louir slender 
trichogyne must, from its position, inevitably b^ continually brought Into 
tliem while still in situ, through the motion of the plant which woidd 
result from the activities of its host, it seems quite probable that such anti 
order to be functional, must become detached at the moment when they c 
and adhere to the trichoijv 
ly 
con- 
In all other genera of the family the anthendla are more complicated 
