'^' 



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



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. IV. AUGUST, 1890. No. 4. 



CONTENTS: 



Plate I. ....... . 



New United States Pupid^e. ..... 



Notes on Sph^rium Secure Prime. Edward W. Roper. 

 New Varieties of Western Land Shells. Henry Hemphill. 

 A New Pupa. Dr. V. Sterki. ..... 



American Association ok Conchologists. 



The Shell-Bearing Mollusca of Rhode Island. Horace F. Carpenter 



General Notes. ....... 



Publications Received. ...... 



PAGE. 



38 



39 

 39 

 41 



44 

 45 

 46 

 47 



48 



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-OfEce as second-class matter. 



FOREIGN AGENCIES:— London,Trubner & Co., 57 and 59 Ludgate Hill; 

 Berlin, R. Friedlander & Son, 11 Carlstrasse. 



