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PREFACE. 
In the following Catalogue, the Author has endeavoured to 
replace the names of the older Writers on Ornithology ; 
thinking, that although the generic name may have been 
altered, in any case, with sufficient reason, by modern Authors, 
it is no reason why the specific should, unless, from a change 
of gender in the generic or subgeneric appellations, or for 
some other good cause, it becomes necessary. He thinks, 
however, it would be much better to suit the new generic 
names to the old specific ones, than to alter the latter to suit 
the former. 
He thinks also, that changing the generic application, does 
not give an Author the right of placing his name, or the words 
Mihi and Nobis after the specific name given by an older one. 
The arrangement of the Catalogue is nearly that of the Baron 
Cuvier, published in the last edition of the “ Regne Animal.” 
Alterations, however, occur in the arrangement of the Families, 
in the “order Passeres, among the Gulls, and in the order Lamelli- 
rostres. 
