$1.00 per Year. ($1.12 to Foreign Countries.) ICcts. 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. IV. /if ol/H* JULY, 1890. No. 3. 



CONTENTS: 



PAGE. 



A New Eocene Fossil from Tkxas. T. H. Aldrich. . . .25 



Nkw Forms of Western Limniaues. Henry Hemphill. . . .25 



Notes on some North American Pupid.^ with Descriptions of new 



Species. Dr. V. Slerki. . . . . . .27 



Remarks on Urosalpinx perrugatus Conrad. Frank C. Baker. . 29 



Preservation of Color in Fossil Shells. Charles R. Keyes. . . 30 



The Isaac Lea Chapter of the Agassiz Association. Dr. M. L. Leach. 31 

 Strength of Limpets. . . . . . . .32 



Collecting Chitons on the Pacific Coast. Mrs. M. Burton Williamson. 32 

 American Association of Conchologists. . ' . . .33 



The Shell-Bearing Mollusca of Rhode Island. Horace F. Carpenter. 35 

 Publications Received. . . . . . . .30 



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 I'ust-Office as second-class matter. 



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

 Berlin, R. Fnedlander & Son, 11 Carlstrasse. 



