THE »- CONCHOLOGISTS’ . EXCHANGE 
69 
Gexchange Column. 
Terms, which must be cash with order, are as fol- 
lows: Exchanges of 20 words, including address, 10 | 
cents; for each additional 10 words the charge will | 
be 5 cents. No exchange will be inserted for less than 
To cents. 
75 cents per annum for a monthly exchange of 20 
words ; $1.00 per annum for a monthly exchange of 30 
words, with privilege of change each month. 
OFFERED:—American Journal of Conchology,seven 
vols. neatly bound, in exchange for shells. 
A large fresh lot of Uniones, nasutus, complanatus 
and luteolus: also, a few Melantho decisa, all in excel- 
lent condition, to exchange for other fresh-water shells 
of the South and West. JOHN WALTON, 77 Arcade, 
Rochester, N. Y. 
OFFERED: —Tellina radiata, Paludina integra, 
Strombus gigas, Modiola plicatula, Mytilus edulis,Crep- | 
idula unguiformis, Levicardium serratum, Columbella 
mercatoria, Limnzea elodes, for land and fresh-water 
shells. WM. WEEKS, Jr., 508 Willoughby Ave., 
Brooklyn, N. Y. 
OFFERED :—Minnesota and marine shells for other 
shells and minerals. Send lists. JOHN M. HOLZ- 
INGER, State Normal School. Winona, Minn. 
OFFERED :—Numerous species of European and 
nean shells in exchange for mollusks from the United 
States and foreign countries. FELIX ANCEY, 34 
Montie de Lodi, Marseilles, France. 
WANTED :—Focene fossils named and localized in 
exchange for others. G. E. EAST, Jr., 241 Evering, 
road, Upper Clapton, Eng. 
OFFERED :—Two hundred species of shells and 
Davies’ ‘“‘Egg Check List’’ in exchange for books on 
Conchology; send title and state the condition of your 
book and I will send you list of the shells. A. A. 
HINKLEY, Du Bois, Ill. 
WANTED :—American correspondents interested in 
the study of the genus Pupa (including Pupilla, Vertigo, 
etc.), of the U.S. Duplicates and other shells for ex- 
TERTIARY and other fossils from Southern State 
and Europe; 50 species of Birds’ Eggs, and 100 pounds 
of Minerals consisting of Amethyst on Agate; Agate 
rough and polished: Pyromorphite: Native Copper 
Zinc blende: Galena: rare Iron Ores, &c., &c., for 
strictly fine and correctly named Mollusca from South 
and Central America, Asia, Africa, and Australia. 
: Address,W. D. AVERELL, 
change. WV. STERKI, M. D., New Philadelphia, O. | 
Chestnut Hill, Phila. | 
OUR PREMIUM LIST’ 
A CHANCE FOR WORKERS KEEN AND 
BRIGHT. 
Send $1.75 and the names of 5 subscribers, 
and we will forward to the originator of the 
club, one copy of Dr. Hays’ ‘Descriptions of 
the Inferior Maxillary Bones of Mastodons,” 
29 plates; or, in heu thereof, 50 cents’ worth 
of shells at List prices. 
Prof. J. E. Kingsley’s ‘Naturalists’ Assist- 
ant,” 228 pages, will be sent post-paid for 
$5.25 and the names of 15 subscribers. 
Woodward’s “Manual of the Mollusca,” 
1880 edition, will be sent free for $10.50 and 
the names of 30 subscribers. 
Tryon’s “Structural and Systematic Con- 
chology,”’ cheap edition, will be sent free for 
$17.50, and the names of 50 subscribers. 
Tryon’s “Monograph of the Terrestrial 
Mollusca of the United States,” plain edition, 
will be sent free for $35 and the names of 100 
: : | subscribers. 
exotic Coleoptera and land, fresh-water and Mediterra- | 
Sowerby’s “Genera of Recent and Fossil 
Shells,” 264 plates, %-morocco, 2 volumes, 
8vo. sent free for $52.50 and the names of 150 
subscribers. 
AND LOOK! 
For $87.50 and the names of 250 sub- 
—i@™ scribers, we will send, express prepaid, 
Bes one of 
Queon’s Educational Microscopes. 
mounted upon a brass tripod stand with adjust- 
able eyepieces, object glasses and diaphragm 
complete. A fine chance for an active worker. 
A COMMISSION of 25 per cent.in CASH 
will be paid in lieu of the above premiums. 
Notrt.—Parties desiring to secure the bene- 
fits of tha above truly liberal offers, must not 
keep the names of subscribers together with 
the subscriptions, until they have completed 
their list, but should send them soon as received 
and we will keep an exact account of them. 
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