May 1904] 
A Translation from Sac car do 
109 
Hab. — Pecos, New Mexico, June 1903, discovered by Dr. 
M. Grabham. Types in N. Y. Botanical Garden. 
In Professor Earle's table of Hypholoma (Torreya, Feb. 
1902) H. docculentum McClatchie, has been omitted. It has a 
clayey-brown pileus, and appears to come near to H. hirto- 
squamulosum Peck. 
SACCARDO: DE DIAGNOSTICA ET NOMENCLATURA 
MYCOLOGICA; ADMONITA QUAEDAM. 
[Ann. Mycolog. 2:195-8. Mar. 1904.] 
TRANSLATED BY FREDERIC E. CLEMENTS. 
I. 
Authors of new species, who describe them at length both 
morphologically and biologically, should append diagnoses of 
them in the usual form, in English, French, German or Italian, 
but above all, if it is possible, in Latin. 
The scattered and often incomplete statements of essential 
characters are found only with difficulty in the long and fre¬ 
quently formless descriptions. In consequence, the diagnoses 
available for systematic compendia are often vitiated, wholly 
through the fault of the original authors. 
II. 
The host plants of fungi shall be designated by their Latin 
names, and not by vernacular names in English, Italian, etc., 
which are often of doubtful meaning. 
It is of the utmost importance that every author should 
indicate the matrix, or host plant, particularly of parasitic fungi. 
III. 
The metric system alone shall be used in indicating meas¬ 
urements. When these are small, the micromillimeter should 
be employed. Fractions of millimeters, or other measurements, 
burdened with marks or signs, are ready sources of error. 
IV. 
For the sake of brevity, the sign already in use since 
1872, should be employed between figures indicating the ex¬ 
tremes of length and width of microscopic organs, in place of 
the sign x, =, : , which are made use of by mathematicians 
in another sense. 
