PREFACE TO THE THIRD EDITION. 



IN the present edition of this List, which has been prepared, 

 as in the case of the former editions, under my superintend- 

 ence, by Mr. Louis Eraser, it has been thought the simplest 

 plan to insert the names of all the species that have been 

 exhibited in the Society's Collection during the past year. 



This will partly account for the increase of the numbers 

 over those given in the last edition of the catalogue though 

 not altogether, as the fact is that the Society's Collection of 

 living animals is being augmented year by year. That this 

 is the case will be easily seen by the subjoined table, in which 

 the numbers of specimens of the three highest classes of 

 Vertebrates in the Society's Gardens on the first of January 

 during the past ten years are given : 



If the numbers were taken in the middle of the summer, 

 instead of on January 1st of each year, they would be larger, 

 as during the autumn the duplicates, consisting principally 

 of animals bred in the Society's Gardens during the year, are 

 disposed of as far as possible. 



PHILIP LUTLEY SCLATER, 



Secretary to the Zoological /Society of London. 



11 Hanover Square, 

 Jan. 1st, 1865. 



