11 
THE NAUTILUS. 
BACK VOLUMES OF THE NAUTILUS. 
Vol. III. May, 1889 to April, 1890, . $1.50 
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 
Of Volume III 20 cents per copy will be paid for Nos. 2 and 12. 
Vols. I and II were known as the “ Conchologist's Exchange .” We 
cannot furnish these, but a liberal price will be paid for the first 
five numbers of Vol. I. 
MA*fES a 
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. 
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. 
Land, freshwater and marine shells to exchange for others. 
iSend lists and receive mine. 
Chas. S. Hodgson, Albion, Ills. 
To exchange for other species, sea or land, Ano suborbiculata 
Say, corpulenta Cpr. and many other Unionidse. Send list and 
receive mine. W. S. Strode, M. D., Lewistown, Ill. 
For Exchange, 3000 species of land and marine shells, including 
rarities in • Mitra , Marginella , Aspergillum, Melania, Unio, etc Wanted: 
Land shells. MissLinter, Arragon Close, Twickenham, Middlesex, Eng. 
For Exchange, shells and curios from the Gulf Coast of 
Florida. Send for list. Mrs. Albert S. Mears, John’s Pass, 
Florida. 
Helix alanda, H. arnplecta, and many other land, fresh-water and ma¬ 
rine shells; in exchange for shells from any locality, send lists and receive 
mine. Morris Schick, 2410 Reese Street, Philadelphia, Pa. 
Offered — A short list of Maine shells. Desired—-Land-shells. 
Rev. Henry W. Winkley, Saco, Maine. 
