Vi PREFACE. 



the great question of the "Origin of Species," having always 

 had especial attractions for me. 



The twenty Plates attached to this Catalogue illustrate some 

 of the most interesting of the new species contained in the 

 collection. They have been drawn from the typical specimens 

 by Mr, J, Jennens. 



P. L. S. 



11, Hanover Square, 

 May 1 1th, 1862. 



