XV111 1 J HE FACE. 



the dislike which many of our own naturalists have to 

 the adoption of sub-genera, he begs to state that they are 

 inserted in such a manner, that any one who chooses may 

 place them upon the same footing with the genera, or, if 

 he be not a friend to the subdivision of the old-established 

 groups, take no notice of them at all. 



Instead of prefixing the generic characters to the several 

 genera respectively as they occur in order, they are pre- 

 sented in a synoptic form at the head of each of the Classes, 

 by which means a better view is obtained of the relative 

 collocation and affinities of the larger groups. Moreover, 

 the same kind of arrangement with respect to types pre- 

 vails here, as that which occurs in the other part of the 

 work. The characters of all those genera and sub-genera 

 which contain truly wild, as well as genuine and now 

 existing species, are printed in Small Pica and Bourgeois 

 respectively, the names of the genera standing in LARGE 

 CAPITALS, those of the sub-genera in SMALL CAPITALS. 

 In the case of the domesticated, naturalized, and extirpated 

 animals, these types are exchanged respectively, as before, 

 for Bourgeois and Minion ; the first two, being, also in like 

 manner, particularly distinguished by an asterisk, the last 

 by a dagger. The same types are employed for the cha- 

 racters of those genera and sub-genera which contain only 

 doubtful natives or doubtful species, but these may be 

 readily distinguished from the last by the circumstance 

 of the names standing in ITALIC Capitals, which are 

 large or small, as in the former instances, according as 

 the group in question is either a genus or sub-genus. 

 Moreover, in this division, the genera have a distinct num- 

 bering enclosed in brackets: the sub-genera no numbering 

 at all. It may be further observed, that the characters 

 of the orders and families are printed in Pica, and that 



