Note on Discovery of the Rest-Spores of the Potato-Fungus. 397 
doubt as to the relation of the spherical bodies produced by 
the mycelium in the substance of the leaves to the Peronospora. 
reronotpora infestavs, Mont. Showing the asexual reproduction by simple spores and by swami- 
spores, with the free zoospores which have fscaind hum the coll of the swarm-spore ; and also 
tlie sexual reproduction 1)y antheridia and ooyonia i)roducins< tlie rcst-^pore or oospore. Drawn 
from the stem of the Chiswicl; plants by Mr. \K. G. Smith, F.L.S. Magnified 200 diameters. . 
These bodies exactly correspond with the sexual organs^that 
De Bary had already described in several species of Peronospora 
