170 FUNGI. 
the size of the zoospores of the same plant. “These particles 
become globose cells, grouped in the centre of the antheridium. 
Afterwards the contents of these latter cclls become divided 
into numerous bacillary spermatozoids, which first break the 
wall of their mother cell, and then issue from the antheridium. 
These rod-like corpuscles, which resemble the spermatozoids in 
Vaucheria, have their movements assisted by a long cilium. It 
is presumable that here, as in the Algw, the spermatozoids 
introduce themselves into the cavity of the oogonium, and unite 
with the gonospheres. 
Amongst obscure and doubtful bodies are those described 
by Pringsheim, which have their origin in thick filaments or 
tubes, similar to those which form the zoosporangia, and re- 
present so many distinct little masses of plasma within an 
homogeneous parietal ganglion. The contour of these plastic 
masses is soon delineated in a more precise manner. We 
see in their interior some homogeneous granules, which 
are at first globose, then oval, and finally travel to the 
enlarged and ampulleform extremity of the generating tube. 
There they become rounded or oval cells covered with cellu- 
lose, and emit from their surface one or several cylindrical 
processes, which elongate towards the wall of the conceptacle, 
and pierce it, without, however, ever projecting very far beyond 
it. At the same time the lacunose protoplasm of each cell 
becomes divided into a number of corpuscles, which escape by 
the open extremity of the cylindrical neck. They resemble in 
their organization and agility the spermatozoids of Achlya dioica, 
They soon become motionless in water, and do not germinate. 
During the development of these organs, the protoplasm of the 
utricle which contains them offers at first completely normal 
characteristics, and disappears entirely by degrees as they 
increase. De Bary and Pringsheim believe that these organs 
constitute the antheridia of the species of Saprolegnia to which 
they belong. 
The oospores of the Saprolegnie, when arrived at maturity, 
possess a tolerably thick double integument, consisting of an 
epispore and an endospore. After a considerable time of reposo 
