ADVERTISEMENTS will be inserted at the rate of 5s. per inch for 

 each insertion. A discount of 25 % if booked for the year. All 

 charges must be paid in advance. 



RepPintS. — Authors desiring additional copies of their papers, may have the same 

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TH E NAUTI LUS. 



A MONTHLY DEVOTED TO THE INTERESTS OF CONCHOLOGISTS. 



Editors and Publishers: 



H. A. PILSBRY, 



Conservator Conchological Section, Academy Natural Sciences, Philadelphia. 



C. W. JOHNSON, 



Curator of the Wagner Free Institute of Science, Philadelphia. 



$1.00 per year. $1.12 to Foreign Countries. 10 ets. a copy. 



The Nautilus is the only magazine in America devoted to the study of 

 Mollusks. Its scope is broad, including articles on recent and fossil shells, often 

 illustrated ; on the anatomy and classification of mollusca ; and papers of popular 

 interest dealing with experiences of collectors in the field. Notes on current publi- 

 cations at home and abroad, showing the drift of opinion on conchological subjects, 

 are a valuable feature. Indispensable to the Conchologist and Paheontologist. 



Exchange Column free to Subscribers. 



Museum Humfredianum. — The undersigned would be glad to 

 exchange for or purchase a copy of the " Museum Flumfredianum," being " a 

 catalogue of the large and valuable museum of Mr. George Humphrey, con- 

 taining many thousand curious subjects (including shells) on Natural History." 

 8vo, London, 1779. (This is possibly a sale catalogue.) 



W. M. WEBB, F. L.S., 2, The Broadway, Hammersmith, London, W. 



