6 CLASSIFICATION OF BIRDS. 



for ; and we trust that, for practical purposes and gene- 

 ral use, the annexed will be found, on the whole, simple 

 and satisfactory. Whatever may be their imperfections, 

 we can at least vouch, from experience, for their tending 

 very materially to facilitate a learner's progress ; and as 

 they are founded on the authority of some of our most 

 esteemed naturalists*, even the more advanced may, it is 

 to be hoped, refer to them with advantaget. 



* Chiefly from Curler and Dumeril. 



t The hest tables of classification and reference we have seen are those 

 now publishing in large sheets with figures, at a very moderate price, by 

 M. Achille Comte, illustrating CDVIER'S Regne Animal. 



