3 °S 
A. E. Lechmere. 
than the first; on coming to rest zoospores germinate directly into 
hyphae. Oospores one to many; oocyst never completely filled. 
Leptolegnia.— Asexual methods the same as in Saprolegnia, but 
there is only one oospore, which completely fills the oocyst. 
Leptomitns. —This genus resembles Saprolegnia closely, but the 
sporocysts are frequently multiple. This is regarded by many as a 
mere form of Saprolegnia as 5. torulosa shows septae, and is 
regarded by De Bary as only a modification of S.ferax. Cornu 
describes this as occurring in forms of Adilya. 
Pythiopsis. —Zoospores on discharge resemble those of the 
second motile stage of Saprolegnia ; on coming to rest they ger¬ 
minate directly, without any second swarming. Zoosporocysts 
arise from branches of the main hyphae, in cymose order, or in a 
chain one behind the other. The new sporocysts never grow up inside 
the discharged sporocyst wall. On other points the genus resembles 
Saprolegnia. 
Adilya. —Zoospores motile on discharge from the sporocyst, 
but they immediately collect at the mouth, encyst and form a group 
of spores. After resting some time, the spores leave their walls 
and become actively motile. The new sporocysts arise from the base 
of the old ones, forming a sympodium. 
Aphanomyce s.—This genus resembles Adilya generally, but 
the zoospores have no cilia and are formed in a single row in a 
very narrow sporocyst. Discharge is brought about by the amoeboid 
crawling of the zoospores from the sporocyst. Encystment takes 
place at the mouth of the sporocyst. There is a second motile stage 
with normal zoospores after a period of rest. The new sporocyst 
grows up within the wall of the old one. 
Dictyudius. —The zoospores encyst within the sporocyst. The 
motile spores later emerge through both the sporocyst wall and 
their own cyst wall. 
Thraustotheca. —The zoospores encyst within the sporocyst 
wall, which then breaks down, leaving a mass of encysted spores, 
from which the motile swarmers are formed. 
A planes. —This genus resembles Dictyudius, but the spores 
germinate in situ, within the sporocyst, without any motile stage. 
A “ Dictyuchus-iovm ” is shown, by some species of Saprolegnia 
