11 
THE NAUTILUS. 
A Valuable Collection for Sale. 
I purpose selling ray library of Scientific Books and ray 
large Collection of Fresh Water, Land and Marine Shells, 
which will afford scientists and others an opportunity of 
obtaining the results of the work of a lifetime. For 40 
years I have corresponded with leading Conchologists and 
collected examples from all parts of the world, many of 
which are exceedingly rare and unique, the collection is 
contained in six large cases of from 12 to 24 draws each, the 
examples are all perfect, first-class and labelled and will be 
open to the examination of an expert. 
Add ress : 
W. D. HARTMAN, M. D., 
WEST CHESTER, 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. 
Send 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 Unionidte. Send list and 
receive mine. W. S. Strode, M. D., Lewistown, 111. 
For Exchange, 3000 species of land and marine shells, including 
rarities in Mi Ira , Margincila, Aspergillum, Melania, XJnio, etc. Wanted: 
Land shells. MissLinter, Arragon Close, Twickenham, Middlesex, Eng. 
Wanted Strepomatidce from many localities. Land, Fresh¬ 
water or Marine Shells in exchange. Strepomatidce identified gratis. 
A. A. Hinckley, Du Bois, Ill. 
Helix alanda, H. amplccta, 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. 
