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, J 894, 100 



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 Conchologists' 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. 



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. 



WANTED : North American Land and Marine Shells in ex- 

 change for European Shells, mostly laud and fresh water. 



COL. PARRY, 18 Hyde Gardens, Eastbourne, England. 



OFFERED : Large collection of marine, also of rare laud shells 

 from New Guinea, Borneo, Philippines, Burmah, etc. WANTED: 

 Exotic Helices. 



Miss LINTER, Arragon Close, Twickenham, Middlesex, Eug. 



FOR EXCHANGE: Land and fresh water shells of southern Wis. 

 for some from other localities. WANTED : Unio tubt r<-iiliilii.< opals, 

 fine crystals, minerals, fossils or marine curios. 



MRS. E. C. WISWALL, Kenosha, Wis. 



WANTED: A specimen of Helix Rowlli Newc. Will give in 

 return a fine new species of Veronicella from the Congo, or Janella 

 tentarn/iil.i ( iriiy. 



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



OFFERED: Unio Fr'n i-mmi \Yright, and other Louisiana Shells, 

 for Unionid.' . L. S. FRIERSON, Frierson Mill, La. 



Km: KXCIIAXHK: A large number of minerals, fossils and 

 shells. For named marine and fresh-water shells. 



H. B. DERR, 6561 Michigan Ave., Chicago, 111. 



Foit EXCHANGE: Pacific Coast shells, for other marine or land 

 shells. MARIA DRAKE, 750 E. St., Tacoma, Wash. 



