120 
JOUENAL OF THE EOYAL HOETICT7LTUEAL SOCIETY. 
leaves have not the appearance of being caused by a Phoma. There 
is a Phoma on the stems in company with the scorched spots, hut 
it is outside of them, and may only have followed the disease, 
becoming established'on the dying tissue which surrounds the scars. 
Only the examination of recent specimens can set the question at 
rest; but my own opinion is that the disease is not identical with 
with the Phoma uvcecola , B, and C., of the United States, and that 
insufficient evidence is afforded to enable us to decide whether it is 
the mycelium of a Phoma which causes the scorched spots. 
Professor Saccarao has sent me from Italy a disease on grapes 
which is called Gleosporium ampelophagum, Sacc. ( Ramularia 
ampelophaga , Pass.), the spores of which are similar to those of the 
Phoma , but there are no perithecia. A very similar appearance is 
certainly to be observed in the dried specimens and some of the 
dried grapes from the Uarbonne, but I should not assume that they 
are identical. 
The second disease was described by lions. Cornu in the 
following terms 
“ I have received from Mons. Blavet, President of the Society 
of Agriculture of Etampes, leaves and bunches of grapes, showing 
a disease which had alarmed the vine growers of that district. The 
grapes, scarcely ripe, showed circular black spots, which appeared 
to radiate from the point of attachment of the grape ; the leaves^ 
partially dried up, were covered in some places rather abundantly 
with a brown mould. 
“ The anatomical examination of a single grape showed an 
abundant mycelium, spreading through the whole of the substance 
of the tissue, and frequently ramifying. The peripheral portions of 
the grape contained the earlier stages of the mycelium. 
“This mycelium is relatively large and black i'n colour, the 
septa are numerous, and the articulations are filled with minute 
oleaginous globules, it presents in places a felted appearance, the 
early state of a second form of fructification which has not arrived 
at maturity. These peculiarities of structure and appearance are 
those of a Pleospora or Cladosporium. The leaves showed on 
their lower surface numerous conidiferous tufts of a fungus 
belonging to the last genus, the nature of which I was able to 
ascertain. A transverse section of the leaf shows that th e 
filaments proceed from the stomata and escape in order to form 
their spores. The filaments are dark brown, septate, ramifying 
but little, and produce at their extremities small spores either 
