BIBLIOGRAPHY. 
81 
also phanerogams. The systematic and geographical information 
relating to lichens is very valuable. We should be very pleased 
to receive similar contributions for publication relating to British 
lichens, or even to learn that a young lichenological student did 
actually exist in Great Britain. 
Fungi Fimico Polonici. By Stanislaw Cbelchowski, Physio- 
graph. Deukschr., Warschau, xii. Band. 
This very interesting paper gives an annotated list of all Polish 
fungi growing on dung, including one new species having the 
following characters : — 
Coprinus equinus, Chelch .— Pileus very delicate, without a dis- 
tinct pellicle, gaping along the line of the gills, ovate, thin, 
campanulate, at length expanded ; greyish-white, covered with 
darker scurf and flocci, disc darker, 3-15 m.m. broad ; gills free, 
whitish, becoming black ; stem slender, glabrous, base somewhat 
bulbous, furnished with a large volva, 18-35 m.m. long; spores 
subglobose or broadly elliptical, 5-8 x 4-5 p. On horse dung. 
A very good plate is appended. 
The Myxomycetes of the Miami Valley , Ohio. By A. P. Morgan, 
Journ. Cincinn. Soc. Nat. Hist., January and April, 1893. 
The primary object of the present contribution is the enumera- 
tion of the species indigenous to a specific region ; nevertheless, 
species outside such area are incorporated, and with the charac- 
teristic figures given, the work, when complete, will be a valuable 
synopsis of the Myxogastres of the United States. The generic 
and specific characters are ample and clear. 
Club-root of Cabbage and its Allies. New Jersey Agric. Coll. 
Expt. Station, Bull. 98 (1893). 
We have a lucid description, well- illustrated, of Plasmodiophora 
brassicce, Wor. Two additional hosts for this fungus are noted, 
Bursa pastoris , L., and Sisymbrium vulgare , L. ; these, in common 
with other weed hosts, should not be countenanced where cruci- 
ferous plants are grown. Lime added to the land, seventy-five 
bushels to the acre, has proved effective in checking club-root. 
Artificial Production of Mushroom-spawn . 
In a very interesting pamphlet entitled “ Sur un noveau procede 
de culture du Champignon de couche,” by MM. J. Costantin and 
L. Matruchot, we have an account of the method by which the 
spawn of the edible mushroom can be produced wholesale. The pure 
spores are collected and sown in a special sterilized nutrient 
solution, and forms a pure white cord-like mycelium. This 
mycelium is placed on sterilized dung, where it develops abun- 
dantly for some weeks. At this stage it has the appearance and 
