PREFACE. 
xii 
Among those who are willing to yield 
submission to the judgment of Linnaeus, 
whose experience in the scrutiny of Nature’s 
laws is, at least, not inferior to that of any 
other man, — among those there are pro- 
bably some, who have been prevented from 
availing themselves of his method of 
arrangement, by the want of an elementary 
introduction, a key to the understanding of 
his Catalogue of Shells, as translated by 
Dr. Turton, and subsequently corrected 
and elucidated by Mr. Dillwyn. 
It is with a view, in some degree, to sup- 
ply this deficiency, and to engage a more 
discriminating attention to the beautiful and 
interesting collections of shells which are 
so frequently found in the cabinets of those 
who know not how to value them, as well as 
