THE CALIFORNIAN LAND SHELLS Oh IHL bFl^H- 

 RAGMOPHORA TRASKH GROUP 



BY 



PAUL BARTSCH 



Curator, Division of Marine Invertebrates, United States National Museum 



No. 2170.— From the Proceedings of the United States National Museum, 

 Vol. 51, pages 609-619, with Plates 114-117 



Published December 21, 1916 



Washington 



Government Printing Office 



1916 



