45 
Prillieux.— Perithdces du Black-Rot. Societe Mycologique de France, 
tome IV, 2 e fascicule, 1888, p. 60. 
Tome 4 V of the reports of the Societe Mycologique contains a paper 
by M. Ed. Prillieux upon the Perithecia of the Black-rot of grapes, in 
which there are several points worthy of special note. Prellieux believes 
that the pycnidia and spermogonia are changed into perithecia during 
the winter. After the asci had developed he found the mouth of the 
perithecia filled with a plug of gelatinous matter, probably composed of 
the remains of a layer of delicate parenchyma that bore the stylospores 
toward the end of summer. As the asci grow they push up this mass. 
The apex of the ascus is very slightly thicker than the rest of the walls, 
and probably becomes gelatinized when the end of a spore presses 
against it. In many cases, however, no opening is made, but the 
spores remain surrounded by a mucilaginous substance until the walls 
of the ascus disappear; undoubtedly the gelatinization of the apex has 
extended to the entire membrane. When the spores have become 
detached from this mass, a particle of transparent, gelatinous substance 
was seen attached to one end, probably for the purpose of fastening them 
to the leaves. 
On the surface of berries which had passed the winter in the open air 
was found a dark-colored mycelium creeping over the cuticle and occa¬ 
sionally bearing spores on branches upright to the surface. Prillieux 
merely mentions tlieir presence, and says he can not decide without fur¬ 
ther evidence as to whether they are part of the Physalospora or are 
some foreign fungus.— Effie A. Southworth. 
MM. Pierre Viala et L. Ravaz. Recherches experimental\es sur les 
maladies de la vigne. Comptes Rendus, tome CVI, juin 18,1888, p. 
1711. 
The Comptes Rendus contains a paper by Pierre Viala and L. Ravaz, 
read before the Academie des Sciences in June, 1888. It comprises a re¬ 
view of the main results of their experiments on the diseases of the vine. 
The proof of the genetic relationship between the different forms of 
black rot and between the fungus on the leaf, stem, and fruit is noted. 
They also record the finding of the Perithecia in France, and state that 
they are either developed from pre-existing pycnidia or produced di¬ 
rectly from mycelium filaments. 
Besides the notes upon Black rot, there are some on White-rot, An- 
thracnose, and Mildew. White-rot was produced on healthy leaves, 
stems, and berries by sowing the spores of Coniothyrium , thus showing 
the parasitism of the fungus, and that it was reproduced by stylo- 
spores. 
The mycelium of Anthracnose was observed in the stems in a latent 
condition during the winter, and the formation of conidia from the same 
mycelium seen the following spring. 
