PREFACE 



THE manuscript of Dr. Pelseneer's volume on the Mollusca 

 now published was completed nearly two years ago. It has 

 been translated and revised for press by Dr. Gilbert Bourne, 



of New College, Oxford, to whom the thanks of both the 



' ^ 

 author and editor are due and aVe cordially tendered. 



E. KAY LANKESTEE. 



December 1905. 



