IV PREFACE TO THE FIFTH EDITION. 



January 1st, 1864, 1 believe that every specimen received will 

 be found to have been inserted in its proper place, although 

 there may of course have been errors in the determination 

 of the species. 



For several years it has been my practice to bring before 

 the scientific meetings of the Society short notices of the 

 more important accessions to the Menagerie, with the object 

 of calling attention to such as are of special interest. These 

 notices are subsequently printed and published in the ' Pro- 

 ceedings' of the Scientific Meetings. Both our ' Proceedings' 

 and ' Transactions ' also contain frequent communications 

 referring to specimens living, or that have previously lived, 

 in the Society's Gardens. I have thought that it would add 

 to the value of the present Catalogue to add references to 

 the f Proceedings ' and ' Transactions ' in all these cases, so 

 as to make the Catalogue a sort of index to numerous pas- 

 sages in our scientific publications that refer to specimens in 

 the Society's collection. 



When animals have been figured in our publications from 

 specimens in the Gardens, a reference to the figure is like- 

 wise added. 



The thirty woodcuts in the present Catalogue have mostly 

 already appeared in the Society's 'Proceedings.' Some of 

 them, however, have been kindly lent to me for the purpose 

 of this Catalogue by the proprietors of ' Nature.' 



P. L. S. 



11 Hanover Square, W., 

 June 6th, 1872. 



