11 THE NAUTILUS. 



BACK VOLUMES OF THE NAUTILUS. 



Vol. IV. May, 1890 to April, 1891, . $1.00 

 Vol. V. May, 1891 to April, 1892, . 1.00 

 Vol. VI. May, 1892 to April, 1893, . 1.00 

 Vol. VII. May, 1893 to April, 1894, . 1.00 

 Vol. VIII. May, 1894 to April, 1895. . 1.00 

 Vol. IX. May, 1895 to April, 1896. . 1.00 

 Of Vols. I and II, which were known as the " Conchologist's Ex- 

 change," and Vol. Ill of THE NAUTILUS, we can furnish odd 

 numbers only. 



Extras of August and September number, (1895) containing an 

 Index to the Conchoid gists' Exchange for binding with the latter, 

 will be furnished at 10 cents per copy. 



Advertisements will be inserted at the rate of $1.OO 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. In order to have the paper out promptly, 

 " copy " is put in the printer's hands on the 2Oth of each 

 month. 



Address, C. W. JOHNSON, 



WAGNER FREE INSTITUTE, 



Philadelphia, Pa. 



"EXCHANGEST 



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. 



WANTED. Slugs from west of the Rocky Mts. Large list of 

 marine and land shells offered. E. G. VANATTA, 



Acad. Nat. Sci., Logan Square, Philada., Pa. 

 FOR EXCHANGE : Marine, land and fresh-water shells for other 

 shells or works on conchology. Send lists. MORRIS SCHICK, 



2410 Reese St., Philada., Pa. 



FOR EXCHANGE: L. and F. W. shells of southern Wis. for same 

 from other localities. Fine sets of Unios for museums polished or 

 natural. WANTED: U. tuberculakus, colored nacre, opals, fine 

 crystals, minerals, fossils or marine curios. 



-~,M i:s. E. C. WISWALL, Kenosha, Wis. 



OFFERED: Southern California Marine for shells of the same 

 class or land and fresh-water shells. H. N. LOWE, 



113 N. Los Robles Ave., Pasadena, Cal. 



WANTED:' Cypnea, cones and foreign laud shells. Can give 

 land, fresh-water and marine shells. Send lists and receive mine. 



CHAS. S. HODGSON, Albion, Ills. 



FOR EXCHANGE: About fifty species of Japanese Shells, Land, 



Marine and Fresh Water. Wanted Helicid:e and I'upidse. Send 



for list. WARREN W. HERMAN, P. 0. Box 1848, Boston, Mass. 



FOR EXCHANGE: Land, fresh-water and marine shells, (many 



rare species ottered) for species not in my collection. List first. 



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



