10 



INTRODUCTION 



Up to the present time none of these molluscs has been described from 

 the North Pacific. A few species are known to occur about Australia and the 

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

 by the Siboga Expedition. The present collection embraces tlm-ty-one species 

 of which all are new with the exception of Limifossor talpoideus 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. 



