Methods of Reproduction in the Saprolegniacece. 193 
the hypha, and, in the second place, by the occurrence of the 
ordinary Saprolegnia method of upgrowth of the hypha through 
the sporocyst. 
On all other points it bears no resemblance to the genus 
Apodya ; and even in the point which bears the closest resemblance, 
namely, the formation of sporocysts one behind the other from 
successive segments, it will be noticed that each segment in the 
genus Apodya is said to discharge by means of a separate process, 
whereas in Species II, when this arrangement of sporocyst 
occurred, each sporocyst discharged through the one above it. 
Moreover, from the great number of oocysts produced and their 
general structure, there seems to be no doubt that this Species II. 
belongs to the genus Saprolegnia, as oocysts are not known to 
occur in the genus Apodya. 
The genus Saprolegnia is very much more complicated, as it 
comprises many species ; these may be conveniently divided into 
three groups, according to the type of oocyst. A table of classifii- 
cation is given, before commencing the determination of the 
species. 
Genus Saprolegnia. 
Classification of the Species, [de Bary (3) and (4)]. 
Ferax-Gvoup. Oocyst has smooth wall, contains many 
oospores and remains firmly attached to hypha until spores are 
mature. 
Monolifera- Group. Oocyst has smooth wall, contains many 
oospores, but separates from the hypha at an early stage before 
oospores are mature. 
Asterophora-G roup. Ooocyst star-shaped, with spiny pro¬ 
jections and only contains a single oospore. 
Table of Species. 
TABLE II. 
I. Oocyst smooth, containing many oospores. 
1. Oocyst remains firmly attached to mycelium till 
oospores are mature. New sporocyst grows up 
within wall of old one. Ferax Group. 
A. Antherocyst nearly always present, 
aa. Antherocyst arises from same branch, which 
bears the oocyst (hypogynous), never formed 
from an adjacent filament. 5. hypogyna (7). 
