JUL 2 1890 



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



THE 



NAUTILUS 



A MONTHLY 

 DEVOTED TO THE LNTERESTS 



OF conchol6gists. 



EDITOR : 



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



ASSOCIATE EDITOR : 

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



Vol. IV. IZ^'!^/ W. MAY, 



1890 



No. 1. 



CONTENTS: 



Editorial. ........ 



An American Anadenus. Henry Hemphill. 

 Two New Species of U. S. Land Shells. U. A. Pilsbry. 

 Annotated List OF THE Shells OF St. Augustine, Fla. C. W. Tohnson 

 Why Does Prophysaon Shed its Tail? W. J. Raymond. 

 Notes ON Some North American Pupid^ with Descriptions ok New 

 Species. Dr. V. Sterki. . . . . _ . 



American Association of Conchologists. 



Notes and Exchanges. ...... 



page. 

 1 



9 

 11 



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. 



FOREIGN AGENCIES:— london.Triibner & Co., .57 and .59 Ludj,'ate Hill; 

 Berlin, R. Fnedlander & Son, II Carlstrasse. 



