$1.00 per Year. ($1.12 to Foreign Countries.) lOcts. a copy. 



THE 



NAUTILUS 



A MONTHLY 



. 



DEVOTED TO THE INTERESTS 

 OF CONCHOLOGISTS. 



EDITOR: 



H. A. Pi LSBRY, Conservator Conchological Section, Academy of Natural Sciences, Philadelphia 



ASSOCIATE EDITOR : 

 C. W. JOHNSON, Curator of the Wagner Free Institute of Science. 



Vol. XI. 



OCTOBER, 1897. 



No. 6 



CONTENTS : 



PAGE. 



NEW LAND SHELLS FROM MEXICO AND NEW MEXICO. By W. H. Ball. . 61 

 ON Two NEW SPECIES OF AMPHIDROMUS. By C. F. Ancey. . . .62 

 NEW SPECIES OF TERTIARY MOLLUSCA FROM VANCOUVER ISLAND. 



By John C. Merriam. 64 



EDITORIAL CORRESPONDENCE . . 66 



ISAAC LEA DEPARTMENT. ... ... .67 



GENERAL NOTES. ..... ..... 69 



PUBLICATIONS RECEIVED. . 69 



A CLASSIFIED CATALOGUE OF AMERICAN LAND SHELLS, WITH LOCALITIES. 



(Continued). By Henry A. Pilsbry 71 



Published by 



H. A. PILSBRY, Editor, Academy of Nat. Sciences, Philadelphia. 



C. W. JOHNSON, Manager, Wagner Free Institute of Science, Philad'a. 



Entered at Philadelphia Post-Office as second-class matter. 



