PREFACE. 



This Catalogue contains a List of all the species of Mollusca 

 belonging to the family Olividce, with the characters of the 

 genera and sections into which the species are divided, 

 indicating at the same time, by a B.M. in the margin, those 

 contained in the British Museum. 



To show the geographical distribution of the species, 

 great attention has been paid to the evidence of the country 

 inhabited by them." 



JOHN EDWARD GRAY. 



British Museum, 

 Dec. 1864. 



