$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. PiLSBRY, Conservator Conchological Section, Academy of Natural Sciences, Philadelphia. 



ASSOCIATE EDITOR: 

 C. W. Johnson, Acting Curator Wagner Institute of Science. 



Vol. VI. NOVEMBER, 1892. No. 7. 



CONTENTS: 



PAGE, 



Catalogue of the Genus Partula. W. D. Haitman, M. D 73 



Annotated List of Alabama Land Mollusca. F. E. Sargent. ... 76 



On a Revision of the American Unionid.^. Chas. T. Simpson. ... 78 



On THE Revision OF the Unionid.b. S. Hart Wright and Berlin H. Wright. 80 



Notes and News 81 



Exchanges , 84 



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-OflSce as second-class matter. 



