$1.00 per Year. ($1.12 to Foreign Countries.) lCcts. a copy. 
THE 
NAUTILUS 
A MONTHLY 
DEVOTED TO THE INTERESTS 
OF GONCHOLOGISTS. 
EDITOR : 
H. A. Pilsbry, Conservator Conchological Section, Academy of Natural Sciences, Philadelphia. 
ASSOCIATE EDITOR : 
C. W. Johnson, Curator of the Wagner Free Institute of Science. 
Vol. VIII. FEBRUARY, 1895. 
No. 10. 
CONTENTS : 
PAGE. 
A Glance at the Chicago Academy of Sciences. (Illustrated.) 
By Frank C. Baker. 109 
On A New Species of IIolospira from Texas. By Wm. H. Dall. . 112 
Megatebennus Bimaculatus. By Mrs. M. F. Bradshaw. .112 
On Collecting Pisidia. By Dr. V. Sterki .113 
New American Fresh-Water Mollusks. By H. A. Pilsbry. . 114 
Mollusks of Allegheny Co., Pennsylvania. By Geo. H. Clapp. . lit; 
Note on Unio Oregonenses Lea. ... 116 
Notes and News. .118 
New Publications.. .119 
Published by 
H. A. PILSBRY, Editor, Academy of Nat. Sciences, Philadelphia. 
C. W. JOHNSON, Manager, Wagner Free Institute of Science, Thilad’a. 
Entered at Philadelphia Post-Office as second-class matter. 
