PREFACE TO THE FOURTH EDITION. 



THE fourth edition of this List has been prepared on exactly 

 the same principles as the third edition. 



The names of all the Vertebrated animals added to the 

 Society's collection during the years 1865 and 1866 have 

 been inserted in their proper places ; and the list in its present 

 state may be considered to contain a complete record of all 

 the species of Vertebrates that have been exhibited alive in 

 the Society's Gardens in the years 1863, 1864, 1865, and 

 1866. 



The total number of these is as follows : 



Mammals 339 



Birds 721 



Reptiles 73 



Batrachians 25 



Pishes 54 



Total . . 1212 



P. L. S. 



11 Hanover Square, 

 July 9th, 1867. 



