0' 



DEC i^ 



$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. 



aV/ __ 



Vol. YII- DECEMBER, 1893. No. 8. 



CONTENTS : 



PAGE. 



L.\ND AND Fresh Water Shells in i he Rocky Mount.\in3. By Geo. 



W. Taylor, Victoria, B. C. . . . s.'i 



H.kckel's Planktonic Studies. . . Sd 



CONTRir.UTIONS TOWARD A REVISION OF THE TaSMAXIAN LAXD MOLLUSCA. 



By H. Suter S7 



In Memoriam — Robert Walton. ....... 90 



A New Hand-Book of the Helices. ...... 91 



Notes and News. 9;] 



New Publications. 96 



Publi.-'lied by 



H. A. PILSBRY, Editor, Academy of Nat. Sciences, Philadelpliia. 



C. W. JOHNSON, Manager, Wagner Free Institute of Science, Philad'a. 



Entered at Philadelphia Post-OfBee as second-class matter. 



