582 The American Naturalist. [June, 
a third figure can be added for the thickness ; for instance, spore 15 <4 
signifies spores 15 » long and 4 » broad and thick; spore 1s 4 © 2 
signifies spores 15 » long, 4 » broad, and 2 x thick. Some authors 
use in place of the character < (which I proposed and have used 
since 1872) the characters =, :, x, which have in mathematics other 
and fixed meanings. For macroscopic organs one must give the units 
of measurement, m., cm., mm., and the parts measured. 
7. In designating plant groups feminine forms are used (Dicotyle- 
dones, Ranunculacez, Anemonez, etc.). The same should be done in 
the Cryptogams; if we say Sphzriacee, Mucedinez, Hydnez, we 
should also necessarily say Pyrenomycetez, Hyphomycetez, Hymeno- 
mycetez, and not Pyrenomycetes, Hyphomycetes, Hymenomycetes, 
as many do. 
8. The colors of plants, especially those of the corolla, of fungi, 
of spores, are often inexactly described. It were well to use an exact 
nomenclature which is founded on normal specimens. I shall publish 
for this purpose a Chromotaxy which I hope will be of great use. 
9. In respect to the nomenclature of the fruits and spores of fungi 
it would be expedient to use only the following terms, which are 
already adopted by most mycologists: Hymenomycetez: pileus 
(which form it also possesses), basidia, sterigmata, spore, cystidia. 
Gasteromycetee et Myxomycetez : peridium, gleba, capillitium, 
flocci, spore. Uredineæ : sorus, uredosporz, teleutospore, meso- — 
spore, pseudoperidium, zcidiospore, paraphyses. Ustilaginez : sorus, 
Spore. Phycomycetez: odgonia, oösporæ, antheridia, spermatia, 
zygosporæ, azygosporangia, zodspore. Pyrenomycetez et Phymato- 
spheeriacee : stroma, perithecium, loculus, ascus, sporidia, paraphyses. 
Discomycetez et Tuberoidex : ascoma, gleba, ascus, sporidia, para- 
physes. Schizomycetez : filamenta, baculi, cocci, endospore, arthro- 
Spore. Spheropsidea: perithecium, basidia, sporule. Melanconiee: 
acervulus, basidia, conidia (but not gonidia, a name which must be 
reserved for the lichens). Hyphomycetez : czespitulus, sporodochium, 
hyphæ, Spore, : 
From the germinating spore arises the promycelium, which com- 
monly produces the sporidiola.— Translated by H. W. Norris. 
x 
