PREFACE. 



Some years ago the Editor had occasion to refer to 

 Eversmann's 'Addenda' in order to consult the original 

 diagnosis of a bird therein described as new ; but after a 

 long and tedious search it was ascertained that no com- 

 plete copy of all three fasciculi composing the complete 

 work was known to exist. It appears that the sale of the 

 work progressed but slowly, and soon after the issue of 

 the third and last "fasciculus " a fire, which took place at 

 Kazan, destroyed the entire stock ; hence the only portion 

 which remained was what had then been distributed. In 

 spite of the most careful inquiries, not only at Kazan, but 

 elsewhere in Uussia and in other countries, and the offer 

 of a large sum for a copy, not a single part was obtained ; 

 and the only copies known by the Editor to exist are the 

 following odd fasciculi, viz. two copies of fasciculus I. (one 

 in the Royal Library at Berlin, and the other in the library 

 of Viscount Walden), two copies of fasciculus II. (one in 

 the possession of Dr. P. L. Sclater, and the other in the 

 library of the Natural-History Society of Ziirich), and one 

 of fasciculus III. (in the last-named library). All these 

 have been placed at the disposal of the Editor, and have 



