ZOOLOGY AND BOTANY, MICROSCOPY, ETC. 
401 
Saprophytic Fungi on the Beet.* — MM. E. Prillieux and Delacroix 
find that when plants of Bela vulgaris are attacked by the very destruc- 
tive parasitic fungus Phyllosticta tabifica , a number of saprophytic fungi 
make their appearance on the decaying leaf-stalks, and among them the 
following new species : — Sphserella tabifica, Ascochyta Betse, A. beticola, 
and Diplodia beticola. The first of these is probably the pycnid-form of 
Phyllosticta tabifica. 
Parasitism of Botrytis cinerea and Cladosporium herbarum.f— 
In connection with the Botrytis epidemic of Gentiana lutea in the Jura, 
MM. E. Prillieux and Delacroix communicate some further cases in 
which the fungus, hitherto considered harmless, shows itself in its para- 
sitic guise. Hyacinths and peonies were infected with the conids of 
Botrytis taken from dead lettuce-leaves. Flowers and stalks were over- 
run by the mycele and killed, later on numerous conidiophores appearing 
on the dead organs. Listera ovata was also found to be overrun by this 
fungus, and grape-leaves were seen deformed by the Botrytis and covered 
by conidiophores. 
It also seems probable that Cladosporium herbarum, especially in the 
form C. fasciculare, becomes parasitic in the leaves of various impor- 
tant plants such as the raspberry and apple, in the former spreading 
from the median to the secondary nerves, and penetrating within, and 
in the latter seated along the edge of the leaves. Whether the last 
instances are cases of post hoc or propter hoc remains to be proved. 
Anthracnose of Cotton.f — According to Prof. G. F. Atkinson, the 
disease known as anthracnose of cotton is produced by a hitherto un- 
described fungus Colletrotrichum Gossypii, which attacks the green 
capsules, and appears also on the leaves in the form of a scurf. It is 
often accompanied by Cercospora gossypina. The unicellular spores, 
rose-coloured in the mass, are abstricted from the end of short colourless 
basids. The mycele gives birth to sclerote-like bodies either imbedded 
in the tissue of the fungus or on the surface of the host. Secondary 
spores are also produced under unfavourable conditions. 
Fungus-parasite on Barley.§ — Herr 0. Kirchner describes the 
disease in barley produced by Belminthosporium gramineum, which 
causes brown 6pots on the leaves and abortion of the ears. The conids 
are large and many-celled, having sometimes as many as eight septa. 
The disease does not appear to attack other cereals. 
Diplogramma, a new Genus of Lichens ||— Herr J. Muller describes 
thirty-seven new species of Lichens from Queensland, together with the 
new genus Diplogramma, most nearly allied to Ptychographa, with the 
following diagnosis : — Thallus obsoletus ; gonidia cum cellulis substrati 
mixta, globosa, viridia ; apothecia gymnocarpica, lirelliformia, duplicia, 
quasi e lirellis duabus completis longitrorsum connatis Opegraphse 
formata ; perithecium parallele quadrilabiatum, hymenia duo parallela 
* Bull. Soc. Mycol. France, vii. p. 19. See Bot. Ceutralbl., xlix. (1892) p. 338. 
t Bull. Soc. Mycol. de France, vi. (1890) p. 134. 
t Jonrn. of Mycol., vi. (1891) pp. 173-8 (2 pis.). See Bot. Centralbl., xlix. (1892) 
p. 280. § Zeitschr. f. Pflanzenkrankk., i. (1891) pp. 24-G. 
|| Nuov. Giorn. Bot. Ital., xxiii. (1891) pp. 385-404. 
1892. 2 v 
