Methods of Reproduction in the Saprolegniacece. 185 
They may either be borne singly and terminally (p. 184, figs .8, 10 and 
11), or they may show the presence of septae (p. 184, figs. 6, 12 and 13). 
In some cases, on the older hyphae, a series of several septated 
segments is found forming a chain gemma (p. 184, figs. 6 and 7). 
The germination may be vegetative (p. 184, fig. 9), but usually 
results in sporocyst (p. 184, figs. 14 and 15), or oocyst formation, 
as the case may be. 
Mention may be made here of the fairly frequent appearance 
of Dictyosporocysts of the true Dictyuchus type (p. 186, fig. 17). 
They are always derived from gemmae and in shape they are broad 
and short. The empty spore cases form a dense network within 
the sporocyst, the wall of which is very thin and is apparently 
directly penetrated by the zoospores on their escape from their 
encysted condition. 
Sexual Organs of Reproduction. At a fairly early stage in the 
life history of this species, after about a week’s growth, and before 
any signs of ordinary oocyst formation were observed, many cases 
were found of the formation of bodies which appeared to be oospores 
contained in organs exactly resembling sporocysts, that is to say 
they had the appearance of the ordinary sporocyst which had formed 
oospores instead of zoospores (p. 186, fig. 1). Several cases showing 
this condition were observed on a single culture, and were frequently 
met with from time to time on various cultures. 
This type of oocyst, or transformed sporocyst, was often so 
narrow that the oospores were egg-shaped instead of spherical; 
the size also is found to vary to a great extent (20//—30//). 
The cylindrical type of oocyst was often observed to result 
from the development of a multiple gemma. The contents of such 
a gemma is seen to divide into several distinct masses, usually four, 
but often only two (p. 186, fig. 7), and more rarely eight or an 
intermediate number (p. 186, figs. 2—4). Each of these masses 
later becomes clearly defined, with a distinct outer smooth membrane 
or exospore, which is fairly thick and of brown colour (p. 186, fig. 3). 
Often the terminal division is more spherical and contains a greater 
number of ova (p. 186, figs. 5 and 6). 
One case was noticed showing great difference in size of the 
ova; a septated gemma developed into a terminal spherical oocyst 
and a cylindrical one below it (p. 186, figs. 4 and 5). The spherical 
oocyst contained eight oospores, average 24// diameter, while the 
cylindrical part contained four diminutive oospores 18// diameter. 
