DIRECTIONS TO THE BINDER. 



The Plates, Catalogues, Indices, Sfc. should follow each 

 other in the order indicated in the " Table of Contents.'^ 



The word at the head of each plate will point out the 

 genus to which if belongs and the figures connected with the sub- 

 jects will show the order in which the plates of each genus fol- 

 low each other. They should he placed, so as to lie open 07i the 

 right side of the hook. 



