$82 CRYPTOGAMIA, 
and that no part of the Vegetable System is less liable ta 
change, or more steady to the rules of a well formed me. 
thod than the Agarics are. te 
_ It must however be allowed, that new species of Fungi 
are daily discovered; but this may be owing partly to the 
greater attention that has of late been bestowed upon these 
subjects, and partly, as Major VELLEY suggested to me, 
to the introduction of so many exotic trees. IG 
It remains now only to speak. of the trivial names, 
This has been a much more arduous labour than can well _ 
be imagined. Much of the difficulties of Botanists, and — 
many of the confusions of writers, have been owing tothe 
application of different names to the same species, or of the 
same name to different species. The extent of this evilis 
hardly credible. Some species have six or eight different 
names, given by as many different authors, and in several ve 
instances the same name has been applied to tenora 
dozen different plants. Surely it is time to put astopto 
this useless increase of difficulties. In the execution of — 
this work, the following rules have been adopted, and they 
are submitted to the consideration of others who may be 
engaged in similar pursuits. oe 
Ist. When a well-known species occurs, to continue the 
name given it by its first inventor, unless obviously and 
highly improper, or unless a long continued attachment 
to another name had quite superseded the use of the 
former, or unless the former name had been previously 
appropriated to another species, ane a 
2d. Never to change a name adopted by Linnaeus, except 
where his name included more than one species, and 
then to assign it to that which he has more particularly 
described. 
3d. In naming a non-descript species, to use the 
_ The discoverer of a new species may find some trow 
in complying with these rules, but he will be rewaré 
considering, how much more trouble he will save to oth 
and how much his fellow labourers in the science will 
themselves obliged by his attentions, sh 
