IV 
PREFACE. 
The first division of the Catalogue contains only such Birds 
as the Author considers entitled to be admitted into a List of 
British Birds. The second, the Extinct Species. The third, 
the principal among the introduced ones. The fourth, those 
which appear to have been added to our Lists without good 
cause, and require further investigation. 
In the following Catalogue, when we refer to the History of 
the Rarer British Birds, our own name is placed after the 
reference. When we suggest merely a new generic or specific 
appellation, either the words Mihi or Nobis are used. 
Eyton, January 20 , 1836 . 
