58 INTRODUCTION. 
named work of M. Ferussac, and its author referred to 
the contents of that work in anticipation of its actual 
appearance. In it, five only, out of the twenty-three 
species are described, and all of them under names dif- 
ferent from Mr. Say's, two of them being adopted from 
M. FeYussac, and three altered arbitrarily from Mr. 
Say's names, which M. Lamarck's own references proved 
that he should have been acquainted with. In 1830, 
M. Deshayes published a continuation of Bruguiere's 
JBHstoire Naturelle des Vers, in the Encyclopedie Me- 
ihodique. Here, under the article Helix, ten of the 
same species arc described. For three of them only, 
Mr. Say's names are retained, (one of these being 
ascribed to M. Ferussac, and another to M. Rafinesque,) 
two appear under names of M. Ferussac, two under 
those of M. Lamarck, and one under that of M. Rafin- 
esque ; one name is changed arbitrarily, and one is 
given as a new species, under a new name. In 1838, in 
the second edition of the Animaux sans Vertebres, 
M. Deshayes noticed twelve of the same species, five of 
which are under Mr. Say's names and ascribed to him, 
three under those of M. Lamarck, three under those of 
M. Ferussac, and one under that of M. Rafinesque. 
The annexed table will exhibit, at one view, the species 
described by Mr. Say, and the names applied to them 
by the other authors referred to. 
