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. 
ABVEMTFISIK© MANTES* 
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 allotv. 
