180 
OF THE HERBARIUM. 
those Fungi and Alga3 which cannot be preserved in the 
herbarium, on account of their size and roughness. Mi- 
croscopic Fungi, on the other hand, growing on leaves, 
twigs, &c., should be fastened down by adhesive slips, 
[but in such a way as to allow of their being taken out 
and replaced, Ed.,] all superfluous wood having first been 
removed, so as to render the specimen as thin and flat as 
possible. Sections of the pileus, hymenium, &c., may 
be similarly treated, and put away in the herbarium. 
Finally, as regards the Algas, the original conditions of 
their preparation, as the reader will remember, necessitated 
the application of paper, before they were removed from 
the water ; to this support they generally cling with the 
greatest tenacity, scarcely rising above the surface — indeed 
very often having all the appearance of a delicate painting. 
The precautions requisite for the preservation of the 
Diatoms and Desmids have been already fully described, 
in the chapters devoted to those subjects. 
Every plant should have a label attached to it, on which 
is inscribed its name and certain other notices, which 
should not be omitted. 
These are — 
1. The name of the family, genus, species, and variety, 
in the Latin language. The Latin tongue (interlarded 
with Greek) has been fixed upon, by common consent, as 
the medium of communication in the scientific world, or, 
at least, over the wide domains occupied by the kingdoms 
of botany and zoology. By this means uniformity of 
nomenclature and accuracy of description are to a large 
extent obtained ; more so, at any rate, than when the titles 
are given in either of the living languages ; for these are 
of merely local value, are without meaning to foreigners, 
and often incomprehensible beyond the narrow limits of a 
district. 
2. The name of the author, that is, of the person who 
first gave the species the denomination, by which it has 
since been recognised. It is written in an abbreviated 
