THE - CONCHOLOGISTS’ - EXCHANGE 13 
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| To every person sending so names with the accom- 
| panying cash a collection of 75 species and 250 speci 
OUR PREMIUM LIST. oe 
To every person sending 25 names and the cash, will 
A CHANCE FOR WORKERS KEEN AND | je sent a collection of 40 species and 125 specimens 
BRIGHT. 
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Send $1.75 and the names of 5 subscribers, and we | These offers consist of choice shells in fine condition 
will forward to the originator of the club, $1.00’s | with correct name and locality in each instance; and 
worth of shells at List prices. will furnish numerous duplicates for exchange. A few 
ed 5 Ss of the genera from which the above will be selected are 
R hel pont alters a is as follows: Nautilus, Murex, Neptunea. Pyrula, Cas- 
ae BS eee = sad EAE ee sidulus, Pleuratoma, Triton, Ranella, Nassa, Purpura , 
pag cae : Pp P 9-25 ones Cuma, Harpa, Oliva, Tasciolaria, Dittorina, Gonioba- 
15 subscribers. sis, Paludina, Ampullaria, Crepidula, Nerita, Neritina, 
Turbo, Trochus, Haliotis, Chiton, Helix, Bulimus, 
Achatina, Achatinella, Clausilia, Planorbis, Lymn a, 
Cyclostoma, Pyshia, Pholas, Mactra, Tellinu, Donax, 
Venus, Cytherea, Tapes, Cardium, Unio; Anodonta; 
Modiola, Arca, Pecten and others. 
ee : * These offers are made simply to increase tha popular 
Reeryons Sthactural aud Syeeaaue Soe oey, interest in that beautiful and highly interesting study— 
Pp wv sent free for $17.50, and the names! Conchology ; as well as to extend the subscription list o! 
of so subscribers. | ‘The Conchologists’ Exchange,’’ a monthly publica- 
a, ' tion to which every shell-collector should subscribe. 
Woodward’s ‘‘Manual of the Mollusca,’’ 1880 edi- 
tion, will be sent free for $10.50 and the names of 30 
subscribers. 
Tryon’s ‘‘ Monograph of the Tercestrial Mollusca of 
the United States,’”’ plain edition, will be sent free for 
$35 and the names of roo subscribers. 
Sowerby’s ‘‘Genera of Recent and Fossil Shells,’ | Special Notice. 
264 plates, %-morocco, 2 volumes, 8vo. sent free for 
$52.50 and the names of 150 subscribers. 
AND LOOK We have made 35 cents the price for Clubs of 5 or 
more subscribers, and in no case will individual sub- 
4s For $87.50 and the names of 250 subscribers, | scriptions be received at less than the new rate of 50 
we will send, express prepaid, one of cents. By request the above Lists will be held open 
until December 1, 1887, so that those who intend to 
Queen’s Educational Microscopes subscribe will find it to their advantage to form Clubs 
7 of five or more and thus secure the benefit of the re- 
duction. In addition to these splendid Premiums every 
subscriber to Volume II has a premium in the shape of 
three (3) free exchanges annually. 
mounted upon a brass tripod stand, with adjustable 
eyepieces, object glasses and diaphragm complete. A 
fine chance for an active worker. 
Parties desiring to secure the benefits of the above 
PREMIUMS IN SHELLS. truly liberal offers, must not keep the names of subscri- 
2 bers together with the subscriptions, until they have 
To every person sending us before December t, 1887, | completed their list, but should send them soon as re- 
the names and cash subscriptions (at the Club-Rate of | ceived and we will keep an exact account of them. 
35 cents per annum), of 100 persons (new subscribers), 
a choice collection of shells consisting of 150 species and A COMMISSION of 30 per cent in CASH will be 
500 Specimens. paid in lieu of the above premiums. 
ANTED—ODD NUMBERS AND COMPLETE VOLUMES OF 
“Random Notes on Natural History,’ containing Mr. H. F. Car- 
penter’s article on ‘‘The Shell-bearing Mollusca of Rhode Island,”’ 
for which good prices will be paid. The Concho. Ex, Chest. Hill, Phila. 
