INTRODUCTION. VU. 



collection ; according to which arrangement, all the eggs 

 of one nest, mil, of course, bear the same mark. If e. g. 

 a collector possess several eggs of the common Buzzard, 

 viz : three found in one nest in Westmoreland, one bought 

 of a dealer, and the other obtained in exchange ; every one 

 of the three eggs found in the same nest will bear on the 

 ticket, \1 a ; the egg purchased, \1 b ; and the egg procm^ed 

 by exchange, 17 c; and the particulars relating to those 

 several specimens will be entered in the Catalogue under the 

 17th species, thus : — 



17 sp. Falco Buteo. Lin. The common Buzzard. 



17 a. Three eggs found in one nest, in the wood at in 



Westmoreland. AprU 18 . 



17 6.? Purchased of iV dealer, at . 



17 c. Exchanged with N for the eggs of N. ———. 



In this Catalogue, the classification of Mr. Temminck has 

 been adopted in preference to any other, in order to prevent 

 mistakes in corresponding with continental naturalists, without 

 whose assistance, it is impossible to form a complete collection 

 of the eggs of British bu'ds ; Mr. Temminck' s classification 

 being the one most generally in use abroad. In order, 

 however, to meet the views of those who prefer another 

 arrangement, 1 have, also, for the most part given the specific 

 name found in the " Nomenclature of British Birds," pub- 

 Hshed by Mr. H. Doubleday, wherever that differs from the 

 name adopted by Mr. Temminck in the second edition of his 

 Manual of Ornithology. 



With regard to the short notice of the habitat and of 

 the eggs of each species, I have in many instances, freely 



