VALUE OF NOMENCLATURE. 491 



have just announced, namely, that to name well, it is neces- 

 sary to know well."* 



If this passage may appositely close this letter, it may 

 with equal propriety furnish a motto for my next ; and in- 

 cline you to lend a more willing ear to my exposition of 

 system after system, each of them being the best index 3'<)ii 

 can have to the condition of Conchology at the period of its 

 publication. 



* Cuvier in Edinb. New Phil. Jouin. April 1829, p. 2. 



