116 
FUNGI MACOWANIANI. 
Ag. (Naucoria) pediades, Fr. Ep. 197. 
In stercore vetusto, inter gramina mont. Boschberg (MacOw., 
No. 1006 et 1377). 
Cel. Berkeley inter fungos ad Uitenbage lectos sub No. 5, 
notat Ag. stmiorbicularem ibidem in fimo vaccino lectum. Ad 
bunc nostrum quoque fungum referrem ; ni stipite crassiore, 
bumiliore, basi bulbilloso potius cum Ag. pecliade, Fr., conveniret. 
Ag. (Naucozia) pygmaeus, Bull. Fi-ies Ep. 194. 
In quisquiliis silvarum ad Somerset E. (MacOw., No. 1310). 
P. Natal (Wood, No. 91). 
Ag. (Naucoria) undulosus, Jungh. Fr. Ep. 109. 
Somerset East, in mont. Boscbberg, sub fruticibus (AlacOw., No. 
1223). P. Natal (Wood, No. 370). 
Sporae breviter ovatae 0*006 x 0*004 mm. 
Ag. (Galera) hypnorum, F'. Ep. 207. 
In silvis, mont. Boscbberg, sub fruticibus ("MacOw. No. 1213). 
Ag. (Galera) tener, ScJioeff. Fr. Ep. 204. 
Inter frutices ad Somerset E. (MacOw.). P. Natal (Wood). 
NECTRIA DITISSIMA. 
According to Hartig (‘‘ Unter. Fdrstbot. Inst. Muncben,” 1880, 
p. 145), a large part of tbe diseases to wbicb forest trees are 
subject are due to tbe attacks of this parasitic fungus. It attacks 
Fagus, Quercus, Corylus, Fraxinus, Carpinus, Alnus glutinosa, 
Acer campestre, and Acer pseudoplatanus. Tilia, Frangula, Padus, 
and possibly also tbe apple. It almost always enters tbrougb 
wounds, especially those caused by bail, or by tbe puncture of an 
insect [Agrilus viridis) ; but in some cases lenticels appear to give 
tbe opportunity. Tbe development of tbe mycelium takes place 
especially in the autumn. Tbe portion of the bark attacked 
assumes a black colour. The mycelium is mostly intercellular, and 
from tbe extremities of tbe excessively fine hyphie are abstricted 
minute conidia resembling scbizomycetes. These are not, how- 
ever, known to serve for tbe propagation of tbe fungus, but bring 
about the rapid destruction of tbe cortical tissue. The medullary 
rays, wood parenchyma, and vessels are also attacked by tbe 
mycelium, causing a brown colour in the wood to tbe depth of a 
few millemetres. In damp weather, especially in September and 
October, tbe fertile cushions make their appearance, producing 
first conidia and then small red perithecia, tbe result of an act of 
impregnation that has not yet been accurately followed. — Journ. 
Roy. Micr. Soc., Feb., 1881, jt;. 85. 
