VI ADVERTISEMENT. 



He will feel himself amply repaid, if, by- 

 having rendered more accessible this one 

 source of pure, rational, and instructive 

 pleasure, he should induce his readers to 

 pursue the study of other Classes among the 

 works of the Creator ; all of which, no less 

 than this, they will find to be demonstrative 

 of Infinite Benignity and "Wisdom. 



No important alteration, and but little 

 addition, has been made in the following 

 sheets, as the Author did not consider him- 

 self at liberty to do much more than correct 

 his errors ; although it were easy to insert 

 new matter and thus depreciate, according 

 to too general custom, the work which is in 

 the hands of the first purchasers. He has 

 been urged to print in an Appendix the 

 French System of Conchology, or rather 



