1875. ] 
THE FUNGUS OF THE POTATO DISEASE 
175 
are seen in the substance of the lamina of the loaf, the two bodies being in contact at H J. 
In fig. 2 many more of the same bodies are shown: some in actual contact; the two upper 
figures, k and l, show the rcsting-spores some time after fertilisation, when a coat of cellu- 
FiGr, 3.—PERONOSPORA infestANS: The Resting-Spore (A) embedded amongst the Leaf-Cells, enlarged 250 
diameters; Semi-mature resting-spore (e), mature ditto (d), enlarged 400 diameters. 
lose is the result. In k the spore is surrounded by this coat, whilst at l the spore is acciden¬ 
tally washed out by maceration in water. The semi-mature rosting-spores, as shown at m m, 
are furnished with a dark coat or skin; this coat, when further maturity is reached, clearly 
