A. E. Lechmere. 
1 7 S 
nevertheless the variations on the ordinary asexual method were 
sufficiently frequent to attract attention. A point of great interest 
in the present species is that now, when oocysts and antherocysts 
do occur, they both show a great variety of form. The oocysts were 
found to be of two kinds, the first form showing a sexual process 
preceding the formation of the oospores, the second form entirely 
parthenogenetic and producing the oospores in greater numbers, 
approximately twice as many as the first form. The antherocysts 
showed the greatest variability in this species. They were found to 
be formed in three distinct ways. The first form derived from a 
separate branch of the mycelium, diklinous ; the second form 
derived from a branch of the same main hypha which bears the 
oocyst on a lateral branch, androgynous. The third form derived 
from a branch of the hypha actually bearing the oocyst, hypogynous. 
Each of these three forms has been made a point of distinction 
for the determination of the species of the genus (see table of 
classification), but in this species all three forms occur in the same 
cultures ; two forms at least were often observed in the same 
hanging drop. 
PART II. 
Examination of the Second Species. 
Species II. The mycelium is composed of numerous fairly 
robust hyphae, seldom branching, which radiate out from the 
medium on which the fungus is growing, forming a dense fringe, 
sometimes rising above the level of the water. The diameter of the 
hyphae is between 30//—40//, which is about twice that of the 
Species I. 
Asexual Organs of Reproduction. The first formed sporocysts 
are perfectly normal in appearance. They are elongated and 
cylindrical in form and borne terminally on the main hyphag, and 
always slightly broader than the supporting hypha. They vary 
greatly in length, but all discharge motile zoospores in the usual 
manner. 
The zoospores are diplanetic and show the usual resting period 
in the encysted condition, followed by the second swarm stage, 
which is of longer duration than the first. The second resting 
period results in direct germination. 
