a 
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. 
A11TBKTISIM© HA'TEtSa 
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. 
West Coast land, fresh-water and marine shells in exchange for 
other North American shells. Send lists and receive mine. 
Williard M. Wood, 2817 Clay St., San Francisco, Cal. 
Wanted, Strepomatidae from many localities, living specimens 
sent the day collected preferred, L., F. W. or Marine in Exchange. 
Strepomatidae indentified gratis. A. A. Hinkley, Du Bois, Ill. 
For Exchange, 3000 species of land and marine shells, including 
rarities in Mitra, Margmella, 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, II. amplecla, 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. 
