236 
areas, frequently at first bounded by the large leaf veins. 
Finally, the whole leaf is affected, turns yellow and drops off. 
The under sides of diseased leaves are covered with a white, 
shining mildew, there is also an internal mycelium in the tissues 
of the leaf, asetos: 
‘** The conidia are unicellular, large, and oblong with rounded 
corners; they are borne singly on short conidiophores. . 
‘So far the disease has only appeared.on old leaves which have 
passed their prime, in which case it simply hastens the fall. . . . 
In Montserrat, last year, it was said to be more serious.’ 
Since this note was published the disease has been recorded from 
year to year, in varying intensity, but little work appears to have 
been done on it, and the fungus has remained unidentified. 
- Recently Mr. Nowell submitted to. Kew typical specimens of 
this cotton mildew, and also. of a somewhat similar mildew on 
agree morphologically with the conidial stage of Phyllactinia 
corylea. He came to the conclusion that the genus represents the 
conidial stage of Phyllactinia, and that both the described species 
were identical with P. corylea. In support of this theory, he 
n 
list of host-plants already recorded for P. corylea, one hesitates 
to describe any Ovulariopsis as a new species. 
On the other hand, the fact has to be taken into consideration 
that in neither of the present West Indian forms has any peri- 
any per- 
fect stage, the two forms under consideration possess fairly dis- 
tinetive morphological characters, differing from of 
_ * Ann. Myc. ii. 1904, p. 498. CS ae 
+ Ann. Myc. iii. 1905,"p. 493. 
