TABLE OF GENERA. 71 



It is to be remarked that Linnaeus, and the natu- 

 ralists of his school, described what is here called the 

 front of the shell as the back, the left valve as the 

 right, and vice versa ; and Lamarck, in general (but 

 not universally), followed the same rule. The method 

 above described is, however, so obviously correct, and 

 every other so liable to confusion from the want of a 

 sound foundation, that it cannot fail, sooner or later, 

 to be universally adopted. 



