een called the fibrous mycelium. Where the filaments
intercross closely, are felted, and inclined to form a membrane, it is
hymenoid mycelium. Where the filaments are so small and close that they
form very compact bodies, constituting those solid irregular products
called sclerotium, it is scleroid or tuberculous mycelium. With malacoid
mycelium we have nothing to do in this paper. It is a soft, pulpy,
fleshy mycelium.

Systematists have divided the Agaricini into groups according to the
color of their spores. These groups are defined as follows by various
authors:

According to--

Elias Fries, 5 groups: _Leucosporus_, white; _Hyporhodius_, pink;
_Cortinaria_, ochraceous; _Derminus_, rust; _Pratella_, purplish
black.

Rev. J. M. Berkeley, 5 groups: Very frequently pure white, but
presenting also pink, various tints of brown, from yellowish and
rufous to dark bister, purple-black, and finally black;
_Leucospori_, white; _Hyporhodii_, salmon; _Dermini_, ferruginous;
_Pratellae_, brown; _Coprinarius_, black.

Dr. Badham, 6 groups: Pure white or a yellow tinge on drying; brown;
yellow; pink; purple; purple-black; some pass successively from pink
to purple and from purple to purple-black.

Mrs. Hussey, 11 shades: White; rose; pale ocher; olivaceous-ocher;
reddish-ocher; ochraceous; yellowish olive-green; dull brown;
scarcely ferruginous; snuff-color; very dark brown.

Hogg & Johnson, 5 groups: _Leucosporei_, white; _Hyporhodii_,
salmon; _Dermini_, rusty; _Pratellae_, purplish-brown; _Coprinarii_,
black.

C. Gillet, 7 shades: White; pink; ochraceous; yellow; ferruginous;
black or purplish black; round, ovate, elongated, or fusiform,
smooth, tuberculate or irregular, simple or composite, transparent
or nebulous, etc.

Jules Bel, 5 groups: White; pink; red; brown; black.

Dr. Gautier, 5 shades: White; pink; brown; purplish-brown; black.

Constantin & Dufour, 5 groups: White; pink; ochraceous;
brownish-purple; black.

J. P. Barla, 7 groups: _Leucosporii_, white; _Hyporhodii_, pink;
_Cortinariae_, ochraceous; _Dermini_, rust; _Pratellae_,
purplish-black; _Coprinarii_, blackish; _Coprini_ and _Gomphi_,
dense black.

L. Boyer, 5 groups, 11 shades: White to cream yellow; pale pink to
ochraceous yellow; bay or red brown to brown or blackish bister;
rust color, cinnamon or light yellow.