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corylea have such marked effects on the host tissues been observed. 
The mature conidia are regularly oblong or elliptical, not elavate 
as.in typical P. corylea. Salmon mentioned (loc. cit., p. 496) that 
e had observed conidia departing from the type on Gossypium 
sp., but he does not appear to have described these further. 
‘In the case of the mildew on Tecoma leucozylon, the fungus also 
occurs more or less broadly effused on the under side of the leaf, 
but does not cause marked discoloration. The conidia here are 
almost all much narrowed towards the apex, and may reach over 
90 « in length, which is greater than any measurement recorde 
for P. corylea. 
i. Ovulariopsis Gossypti, Wakef. 
ii. O. obclavata, Wakef., x 250. 
In view of these facts, it seems advisable, for the present at 
any rate, to give these forms distinctive names. Descriptions are 
therefore appended. 
Ovulariopsis Gossypii, Wakef., sp. nov. 
reticulato-rimoso. 
Habitat. On old leaves of ‘‘ Sea Island Cotton ’”’ (Gossypium 
barbadense) Barbados, April, 1920, W. Nowell. ; 
