Che Conchologists Exchange. 
~ Wee RIGHT SECURED 
Mote ale 
CHESINUD BILE PHILADELPHIA, PAY FEBRUARY, 1887. 
No. 8 
A Publication Designed for Conchologists and 
Scientists generally. 
WO DAV ERELL, 
Epvitor ano PustisHER. 
4ig> Correspondence upon Conchology, as well as 
fables items of interest concerning the Mollusca, their 
habits, localities, etc., kindly solicited from all. 
Matters for A cbiicadon must be received by the 
twentieth of each month. 
TERMS 
Subscription, per annum - - 
To Foreign Countries - - 
Single copies three cents each 
Remittance should be sent by Money Order, Postal 
Note, or by Registered letter. Unused United States 
Postage Stamps will be receiv Be 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. » 
One inch, displayed, 1 month ........-.... $ 75 
One inch, displayed, 3 months ........-..... I 50 
One-half column, displayed,1 month ...... 2 50 
One-half column, displayed, 3 months...... 5 00 
One column, displayed, 1 month ............ 5 00 
One column, displayed, 3 months... 10 00 
> ie the first of August, 1886, we have ! 
distributed freely among the scientists of 
this and foreign countries upwards of 
15,000 copies of THE CoNCHOLoGIsTs’ Ex- 
CHANGE and we have the great satisfaction of 
hearing from many sources that our liberality 
is appreciated. A glance at our columns in 
this number will convince you that we justly 
think our publication ot more value to science 
than ever, while a kindly comparison with the 
early numbers will clinch the argument. As 
promised, Mr. William A. Marsh begins in 
this number a highly interesting series Gi orici- 
nal articles on the land and fresh-water shells 
of Mercer County, Ulinois. Mr. Charles T. 
Simpson of Ogallala, Nebraska, contributes a 
valuable paper which will throw much light 
upon the molluscan fauna of Tampa Bay, 
Florida. Our Young Collectors’ Corner makes 
its first appearance this month and is designed, 
as its title indicates, for beginners in Conchol- 
ogy. Dr. V. Sterki, late of Switzerland, has 
written for this column an article which will 
be of especial value to our young friends in 
collecting shells. We agree with Dr. Sterki 
in urging the young to collect and study the 
smaller shells as well as the larger specimens, 
for in no other way can the youthful scholar 
hope to excel. 
A NOTABLE instance of unchanged habitatis 
furnished in the case of Cyclostoma elegans. 
This pretty shell is found to-day in Burwell 
Wood, Lincolnshire, England, in the same lo- 
cality in which it was found in 1678 by Dr. 
Martin Lister an enthusiastic conchologist who 
records the fact in his quaint work entitled 
fistore Animalium Anglie.”’ Dr. Lister also 
found Zonites fulvus in moss at the roots of 
trees in the same noted forest, but lat@r writers 
have pronounced it extinct in that locality. 
Apropos of this circumstance, and in view of 
the painstaking and loving care with which 
successful collectors pursue their studies in 
Concholozy, we wish to impress upon 
young collectors the importance of exactness 
in recording the details of their rural excursions 
and evening experiments. 
THE nextnumber will contain an article up- 
on the Helicidee, by Mr. C.F. Ancey, continued 
from No. 5; one from Rev. W. M. Beauchamp 
upon * The Erosion of Fresh-Water Shells,” 
together with a continuation of the two Jead- 
ing contributions begun in this issue. The 
admission to this feast will be a fully paid sub- 
scription presented at the door. 
