THE CONCHOLOGISTS’ EXCHANGE. 29 
= 
TERTIARY and other fossils from Southern States 
and Europe ; sospecies of Bird’s Eggs ; and 60 pounds of 
Minerals consisting of Amethyst on Agate; Agates 
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, 
Chestnut Hill, Philada., Pa. 
BOOK EXCHANGE. 
@PEN TO ALL SCIENTISTS AT THE SAME 
“*ENCHANGES IN MOLLUSCA.”’ 
RATE AS 
OFFERED :—Woodward’s Manual of the Mollusca 
75 Edition; Leidy’s Memoir of the Extinct Sloth 
eine: N. A.; Lea’s Syn. of Family of Naiades, ’52 
edtn; Hayes’ Descrip. Inf. Max’y Bones of Masto- 
dons, ro plates; Agassiz & Gould’s Comp. Physi- 
ology, Bohn’s edt’n; Coultas, Prin. Botany, Crypto- 
gamia: Lea’s on a Fossil Saurian of the New Red 
Sandstone Formt’n; Lesquereux’s Cretaceous Flora, 
so plates, Smith’n Mis. Col. Vol. 4, Neuroptera, Vol. 
6 Diptera and Coleoptera, 3 pp. out. 
WANTED: First 3 vol. Lea’s Obs. Genus. Unio; 
Say’s American Conchology ; Goulds Invertebrata of 
Mass; Kiener’s plates of Shells; Carpenter’s works ; 
‘Tryon’s Monog. Terr. Moll. of U. S.; Sowerby’s 
Conch. Manual and Pilates; for offers in works on 
Conchology. W.D. AVERELL, 
Chestnut Hill, Phila. 
OFFERED :—“* A Manual 
Milne Edwards; ‘‘ A Manual of Blow-pipe Analysis,’’ 
by Wm _ Elderhurst, M.D; ‘ Sulphurets,’” how 
concentrated, worked and assayed. Wanted—a good 
copy of ‘‘Woodwards Manual of Mollusca’’ and 
other works on Conchology. 
G. Me MICHAEL, aS, 
of Zoology,’’ by M. 
Morro, Cal. 
WANTED: _tTry on, American Marine ee : 
colored edition. Offered— Sowerby, Venerida; Knorr, 
Hoorns en Schulzen. M. M.SCHEPMAN, 
BOER: near Rotterdam, Hol and. 
IMPORTANT! 
By devoting part of your leisure time to 
forming ‘*Clubs’’ of subscribers to ‘The 
Conchologists’ Exchange,” you can secure for 
yourself the following advantages :— 
OFFER No. 1.—go cents in cash and the 
names of five subscribers, will secure to you a 
free subscription to the ‘‘ Exchange,’’ and 
shells to the value of 50 cents from our PRICE 
LISTS OF MOLLUSCA which will be sent 
on application. 
OFFER No. 2.—$1.65 in cash and names 
of ten subscribers, will secure you a free sub- 
scription and $1.00 worth of shells. 
OFFER No. 3.—S3 in cash and twenty 
names will secure you a free subscription and 
$2 00 worth of shells. These shells will be 
post-paid in all cases. 
By request we hold these liberal offers open 
until February 15th, 1887, by which time we 
hope those raising Clubs will have completed 
their Jists and secured the fine shells in re- 
serve for ee 
THE WEST AMERICAN SCIENTIST. 
This journal, established in 1844, begins a new volume as a 24-page 
illustrated monthly magazine of 
FPOrPuULvrAR: SCIiBPNCE: 
A feature consists of articles on topography and natural history of Upper 
and Lower California. 
year, Io cents a copy. 
Eminent Scientists are contributors. 
Agents wanted. 
Price $1.00 a 
Cork. ORCUTT, Zaior, 
San Diego, Cal. 
Send eee 6 cents for a four months’ trial subscription. 
