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



THE 



NAUTILUS 



A MONTHLY 

 DEVOTED TO THE INTERESTS 



1 \ / i 



OF CONCHOLOGISTS. 



"$*&&& 



EDITOR: 

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



ASSOCIATE EDITOR : 

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



Vol. XII. 



MAY, 1898. 



No. 1 



CONTENTS : 



PAGE. 



NOTES ON SOME LAND AND FRESHWATER SHELLS FROM SUMATRA, WITH 



DESCRIPTIONS OF NEW SPECIES. By T. H. Aldrich. ... 1 



ON A NEW SPECIES OF Fusus FROM CALIFORNIA. By Wm. H. Ball. . 4 



NEW UNIONID^. By Berlin H. Wright. 5 



ISAAC LEA DEPARTMENT. 6 



GENERAL NOPES 9 



RECENT PUBLICATIONS. ... 10 



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. 



