ll THE NAUTILUS. 
STANDARD WORKSSON CONCHOLOGN 
SOLD ONLY FOR CASH. 
STRUCTURAL AND SYSTEMATIC CONCHOLOGY. By Geo. W. Tryon, Jr. New, 
complete, cheap edition. Illustrated. $8.00, postpaid. 
WOODWARD’S MANUAL OF THE MOLLUSCA. Appendix by Ralph Tate. Last 
edition, $2.75, postpaid. 
KEEP’S WESL COAST SHELLS. A fascinating book for collectors, young and old. 
182 illustrations. $1.75, postpaid. 
BALDWIN’S LAND SHELLS OF THE HAWAITAN ISLANDS. 25c., postpaid. 
WRIGHT'S CHECK LIST OF N. A. UNIONID/E, &c. 25c., postpaid. 
RANDOM NOTES ON NAT. HISTORY. Containing H. F. Carpenter’s article, “‘ The 
Shell-Bzaring Mollusca of R I.;’’ and Ritchiz’s ‘Check List of Shells.’ Vol. 1, minus 
Nos. 1 aud 2, 75c.; Vol. 2, 60c.; Vol. 3, 60c. Postpaid. 
THE CONCHOLOGISTS’ EXCHANGE. Back numbers. Vol. 1, minus No. 1, 50c.: 
Vol. 2, Nos. 1 tog, 35c. Postpaid. 
CONTRIBUTIONS to the Mollusca of Florida By Chas. T. Simpson. Price 25c., postpaid. 
NOMENCLATURE AND CHECK-LIST OF AMERICAN LAND SHELLS. By H.A. 
Pilsbry. Price roc., postpaid. 5oc. per dozen copies, postpaid. 
Orders taken for Tryon’s Manual. Conchological, and other works not in stock, supplied at short notice. 
W. D. AVBREEL, Mt.Airy, Philaraipar 
Nomenclature and Check- List 
—oF— 
AMERICAN LAND SHELLS. 
A list of United States Land Shells, compl-te to Sept., 1889, containing the 
species and varieties with their habitats, prefaced by a brief discussion of their 
nomenclature. 
Collectors interested in American Shells will find this a useful list for arranging 
and na ning their collections, checking desiderata in making exchanges, ete. 
20 pages, Octavo, Price, single copies - 1O cts: 
iy oe “¢ per dozen - 50 cts. 
Address : 
HH. A. PIESBRY, 
Academy of Natural Sciences, 
Logan Square, Philadelphia, Pa. 
