Methods of Reproduction in the Saprolegniacece. 195 
The Determination of the Species. 
Owing to the fact that the oocysts are smooth, contain many 
ova, and remain firmly attached to the hyphae, this species evidently 
falls into the ferax- group. 
Following the classification just given of this group, it is seen 
to come into the second division, characterised by the absence of 
the antherocyst. This limits the species to 5. Thureti or S. 
torulosa. 
As mentioned in the first part of this paper, the two species 
under investigation showed sufficient differences in the cultures 
to be separated as Species I. and Species II. respectively. This 
separation was carried out and each investigated separately, with 
the result that Species I. was determined as 5. torulosa. There now 
remains for the determination of Species II, only S. Thureti, if it is 
to be really distinct from Species I. 
On all points of general appearance of the hypae in the cultures 
it certainly does appear to be a distinct speeies. 
In his summary of the /mur-group, de Bary (5) shows that 
the so-called S. ferax can really be resolved into at least three 
distinct, yet closely related species, viz., 5. monoica, S. Thureti and 
vS. torulosa. A fourth species may also be included, 5. mixta, which 
may be only a variety of 5. monoica. 
The absence of the antherocyst, although complete in this 
case, must not be taken as conclusive, as the presence of the organ 
is known to be variable in the group. On many points, the present 
species resembles another species in this group—5. dioica, at least 
in so far as can be made out from text descriptions. 
A short description of each of these species of the/mi.v-group 
with the exception of S. torulosa is given below, so that comparison 
can be made of the points in common. 
I. S. Dioica, de Bary (5, 17). 
Mycelium, slender lax hyphae 20-40//. thick, bearing long 
cylindrical or club-shaped sporocysts, very slightly wider than the 
hyphae and often very long and slender, 80-400//. 
After the discharge, new sporocysts grow up repeatedly within 
the old wall, each one successively shorter than the precedent, so 
that the nesting of the successively formed sporocysts after their 
discharge is very clearly shown. 
