VI DEDICATION. 



and a species have been greatly at variance ; but with a maturer 

 knowledge of the general organization of the animal, and a clearer 

 perception of the variableness of specific characters of shells, I 

 have come to entertain many of the views which I formerly dis- 

 regarded. No man has contributed so assiduously, through a 

 long course of years, to our knowledge of the Land and Freshwater 

 Mollusks of the British Isles, as yourself. It is in recognition of 

 this service, and in grateful remembrance of some of the happiest 

 days of my life, that I do myself the pleasure of dedicating to you 

 the present volume. 



I am, dear Dr. Gray, 



Your very obedient Servant, 



LOVELL REEVE. 



Hutton, Brentwood. 



January, 1863. 



