11 THE NAUTILUS. 



BACK VOLUMES OF THE NAUTILUS. 



We can furnish only the following Vols, complete, Price $1.00 each. 



Vol. IV. May, 1890 to April, 1891. 

 Vol. V. May, 1891 to April, 1892. 

 Vol. VI. May, 1892 to April, 1893. 



Volume III (Numbers 2 and 12 wanting) $1.00. 20 cents per 

 copy will be paid for Nos. 2 and 12. Vols. I and II were known as 

 the " Conchologisfs Exchange." We cannot furnish these, but a 

 liberal price will be paid for the first seven numbers of Vol. I. 



ABlTEffiiriSIK© HA^ 



Advertisements will be inserted at the rate of $1.00 per 

 inch for each insertion in advance. Smaller space in propor- 

 tion. A discount of 25 per cent, will be made on insertions of 

 six months or longer. 



Address, C. W. JOHNSON, 



Wagner Free Institute, 



Philadelphia, Pa. 



SPECIIVIEIS9 TRAYS 



FOR OABSHVETS. 



je§§e jone§ a bo., g^^ commerce street, 



PHILATELPHIA. 



G. B. SOWERBY, 



121 Fulhara Road, London, S. W. 



Has always on hand a fine stock of Recent Shells from which 

 selections may be made on the premises or specimens sent for 

 selection. 



Collections. — Illustrative of Generic and sub-generic forms and 

 species from £ 1 to £ 500. 



Collections Purchased.— Specimens Bought or Exchanged. 

 — Correspondence invited with Residents in or visitors to places 

 where shells and other objects are obtainable. 



" Thesaurus Conchyliorum " by G. B. Sowerby, F. L. S., in 

 44 parts 25s. each part, (less for the whole work) any Part or 

 Monograph may be had separately. 



"Illustrated Index of British Shells," by G. B. Sowerby, 

 F. L. S., new edition (1887) with 26 colored plates 750 figures. 

 Imperial 8vo. cloth 35s. 



" Marine Shells of South Africa" — A catalogue of all the 

 known species (1892) with references to figures in various works, 

 descriptions of new species and figures of such as are new, little 

 known, or hitherto unfigured. Imperial 8vo. cloth 12s. nett. 



