irmed, and is considered (how
justly we cannot say) a "canard."

[D] This method is pursued with great success by Mr. Ingram, at
Belvoir, and by Mr. Gilbert, at Burleigh.

[E] Cuthill, "Treatise on the Cultivation of the Mushroom," p. 9.

[F] Mr. Berkeley lately recommended, at one of the meetings of the
Horticultural Society at South Kensington, that the railway
arches should be utilized for the cultivation of mushrooms.

[G] Badham, "Esculent Funguses," 1st ed. p. 43.

[H] Broome, "On Truffle Culture," in "Journ. Hort. Soc." i. p. 15
(1866).

[I] No faith, however, is, in general, placed on these treatises, as
they were merely conjectural.

[J] Dr. Bull has been very successful in developing the _Sclerotium_
of _Agaricus cirrhatus_.

[K] Currey, "On Development of _Sclerotium roseum_," in "Journ. Linn.
Soc." vol. i. p. 148.

[L] Currey, in "Linn. Trans." xxiv. pl. 25, figs. 17, 26.

[M] Berkeley, "On Two Tuberiform Veg. Productions from Travancore,"
in "Trans. Linn. Soc." vol. xxiii. p. 91.

[N] Berkeley, "On a Peculiar Form of Mildew in Onions," "Journ. Hort.
Soc." vol. iii p. 91.

[O] De Bary, "Ann. des Sci. Nat." 4th series, vol. xx.

XIII.

GEOGRAPHICAL DISTRIBUTION.

Unfortunately no complete or satisfactory account can be given of the
geographical distribution of fungi. The younger Fries,[A] with all the
facilities at his disposal which the lengthened experience and large
collections of his father afforded, could only give a very imperfect
outline, and now we can add very little to what he has given. The
cause of this difficulty lies in the fact that the Mycologic Flora of
so large a portion of the world remains unexplored, not only in remote
regions, but even in civilized countries where the Phanerogamic Flora
is well known. Europe, England, Scotland, and Wales are as well
explored as any other country, but Ireland is comparatively unknown,
no complete collection having ever been made, or any at least
published. Scandinavia has also been well examined, and the northern
portions of France, with Belgium, some parts of Germany and Austria,
in Russia the neighbourhood of St. Petersburg, and parts of Italy and
Switzerland. Turkey in Europe, nearly all Russia, Spain, and Portugal
are almost unknown. As to North America, considerable advances have
been made since Schweinitz by Messrs. Cu