11 THE NAUTILUS. 



A New Catalogue of North American 



Land Shells 



A revised reprint of the Catalogue published in THE NAUTILUS 



from August, 1897 to April, 1898. Giving the geographic 



distribution, most recent synonymy, varieties and 



classification of all species known to 



inhabit America north of 



Mexico. 

 35 pages, in paper coyer. PRICE 25 CTS. 



COMPLETE VOLUMES OF THE NAUTILUS, 

 Vols. IT to XI inclusive, $1.00 per Tol. 



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Address, C. W. JOHNSON, 



WAGNER FREE INSTITUTE, Philadelphia, Pa. 



EXCHANGES, 



The following space is to be given to exchanges. Notices not 

 exceeding three lines, will be free to subscribers as long as our 

 limit of space will allow. 



FOR EXCHANGE : Many desirable land, fresh water and marine 

 shells, especially from N. Africa, for species not in my collection. 

 List first. 



C. F. ANCEY, admiuistrateur adjoint, Dra-el Mizan, Algeria. 



FOR EXCHANGE : Austrian shells ; also various marine, land 

 and fresh water shells, for species not in my collection. List first. 

 A. OBERWIMMER, Med. Ill, Haupt St. 97, Vienna, Austria. 



FOR EXCHANGE: Cyprceas for Cyprceas, send list to 



MRS. S. L. WILLIAMS, 593 Jackson Boulevard, Chicago, 111. 



OFFERED : Tertiary and recent land and fresh-water shells of 



France. WANTED ; Tertiary and recent shells of North America. 



ANDRE BONNET, 55 Boulevard St., Michel, Paris, France. 



FOR EXCHANGE : U. S. and foreign shells, send list and receive 

 mine. TH. JANSON, 1365 N. Washtinaw Ave., Chicago, 111. 



