$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, Philadelph 



ASSOCIATE EDITOR: 

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



Vol. X. 



JULY, 1896. 



No. 3 



CONTENTS : 



ON THE AMERICAN SPECIES OF ERVILIA, By Wm. H. Dall. 

 NOTES ON MOI.LUSKS OF FLORIDA. By Joseph Willcox. 

 A WORD ABOUT SPH>ERIA. By Edward \V. Roper. . . . . 

 THE MUSSELS SCARS OF UNIOS. By Cha-. T. Simpson. 

 DESCRIPTION OF Two NEW SPECIES OF ACHATINEI.LID/E FROM 



HAWAIIAN ISLANDS. By D. D. Baldwin 



ISAAC LEA DEPART MENT 



AN INTERROGATION REGARDING THE FOSSIL SHELLS OF SAN PEDRO 



NOTES AND NEWS - . . . 



NOTICES OF PUBLICATIONS RECEIVED. 



PAGE. 



. 25 



. 27 



. 23 



. 29 



THE 



. 31 



. 32 



BAY. 33 



. 34 



35 



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. 



