10 



INTRODUCTION 



Up to the present time iKine of tliese molluscs has been describeci from 

 the North Pucifie. A few species are known to occur about Australia an(.l the 

 Philippines, and an extensive collection was made in the East Indian Archipelago 

 Ijy the Siboga Expedition. The present collection embraces thirty-one species 

 of which all are new with the exception of Limifosaor lalpoideus Heath; the 

 species belong to fourteen genera of which eight are new. From this material it 

 becomes increasingly evident that this group of molluscs is cosmopolitan; but 

 there is no evidence of a bipolarity or any indication that the north and south 

 poles were centres of distribution. And furthermore there is no apparent 

 relation between size and geographical distribution. 



In concluding this section of the paper it becomes a most pleasant duty to 

 express my obligation to those who have aided in its completion. To Hon. 



