Che Conchologists E xchange 
COPYRIGHT SECURED 
Mote 
CHESINGT EVES PRMcAD EE PHTA, PAs PU 1887 
No. 7 
A Publication Designed for Conchologists and | 
Scientists generally 
Wii bo AVE RELL 
Epitor AND PuBLisHER 
4- Correspondence upon Conchology, as well as 
reliable items of interest concerning the Mollusca, their 
habits, localities, etc., kindly solicited from all. 
Matters for publication must be received by the 
twentieth of each month. 
TERMS 
Subscription, per Annum 
To Foreign Countries 
Single copies three cents ts each 
25 cents 
35 cents 
Remittance should be sent by Money Order, Postal 
Note, or by Registered letter. Unused United States 
Postage Stamps will be received in any amount in pay- 
ment of bills. 
Address all correspondence to 
WM. D. AVERELL, 
Editor and Publisher 
Chestnut Hill 
Philadelphia, Pa., U.S. A. 
ADVERTISING RATES 
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One column, displayed, THOUEE I isacesece. 
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HE ConcHo.ocists’ EXCHANGE is later 
1% than usual this month owing to changes 
looking towards its improvement, typo- 
graphically and otherwise. As our constant aim 
is to improve our little paper in all departments 
we hope our readers will kindly excuse the 
delay in issuing this number. The number 
for February promises to be exceptionally in- 
teresting, as several new features will be 
added. Our young friends will be remembered, 
and a column devoted to information for their 
use in collecting shells. They are cordially 
invited to correspond with us in regard to 
their collecting trips and to make this “Young 
Collector’s Games cheerfuland sociable. We 
_ hope to include in February number a highly 
| the project, 
| ing all the 
interesting serial article on ‘* The Shell-bear- 
ing Mollusca of Mercer County, Illinois,” by 
Mr. Wm. A. Marsh, of Aledo, Illinois, whose 
conscientious labors in behalf of science are so 
well-known and valued, together with a 
| more general attention to scientific informa- 
tion, new discoveries, reports of societies, etc. 
We look forward to the future confident of 
| success and sincerely trust you will hail our 
coming with a cheery welcome. 
A VAST stride towards scientific success has 
been made in the Australasian colonies by 
now well under way, of unit- 
scientific societies in the  colo- 
nies in one grand society to be known as 
“The Australasian Association for the Ad- 
vancement of Science.’”? As there are some 
twenty societies in the colonies with a mem- 
bership of upwards of 3,000 the scheme wili 
not lack for material, while the countries 
especially interested, as well as the world in 
geueral, will be highly benefited. Advantage 
_ has been taken of the centennial anniversary 
of the foundation of the colonies to further the 
enterprise. 
HEREAFYER “ THE CONCHOLOGISTS’ Ex- 
CHANGE”’ will be issued not later than the 
25th of each month, and we sincerely hope 
that all communications will be sent so as to 
be received wot later than the 20th of each 
month, to secure prompt publication. 
SUBSCRIBERS will please note that the price 
of “The Exchange,’ has been increased to 
thirty-five cents per annum, and 50 cents to 
foreign countries. Those who subscribe prior 
tothe 15thof February will have the benefit of 
the 25-cent rate. 
