$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, Curator of the Wagner Free Institute of Science. 
Vol. VIII. iZLjftJtf AUGUST, 1894. No. 4. 
CONTENTS : 
PAGE. 
On the Orthalicus of Florida. By H. A. Pilsbry . 37 
Synopsis of the Mactrid.® of Northwest America, South to 
Panama. By Wm. H. Dali. 39 
A Few Notes on Helix Tridentata. By A. G. Wetherby. . . .43 
On Chiton Hartwegii Cpr. and its Allies. By H. A. Pilsbry. . . 45 
Notices of New Japanese Mollusks. By H. A. Pilsbry. . . .47 
General Notes.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-Office as second-class matter. 
