A. E. Lechmere. 
190 
through a separate opening, and immediately swarms away; a 
polygonal network of cell-walls remains behind in the sporocyst. 
Dictyuchus. 
II. Spores not discharged from sporocyst; no swarming 
occurs, but spores germinate within the sporocyst. Aplanes. 
Sub-Family Apodye^: (Leptomitaceze). 
Mycelium composed of hyphae constricted at approximately 
equal distances into segments. 
1. Zoospores formed within the sporocysts and are 
all discharged through the same opening. 
a. Zoospores immediately disperse by active 
swarming. Apodya. 
b. Zoospores show feeble swarming and encyst near 
the sporocyst. Apodachlya. 
(2). Zoospores formed outside the sporocyst. The 
contents of sporocyst is discharged as a bladder¬ 
like mass, from which the zoospores are formed 
and discharged later. Rhypidium. 
From the consideration of the sum total of the character of 
Species II., given in the Summary, it seems to belong, undoubtedly, 
to the genus Saprolegnin ; but on two points, at any rate, it 
approaches the genus Apodya. 
The following general description of these two genera is 
given:— 
Genus Saprolegnia, Nees. v. Esenbeck. 1823. 
Mycelium composed of stout radiating hyphae, bluntly rounded 
at the apex. Main hyphae unbranched or with monopodial 
branching at time of sporocyst formation. Sporocysts are formed 
terminally on the main hypha or its branches; they are cylindrical 
or club-shaped and contain many rows of zoospores ; discharge 
takes place by means of a terminal opening of which the orifice is 
often drawn out into a short tubular process. After discharge, 
upgrowth (durchwachsend) of the hypha takes place within the 
