$1.00 per Year. 10cts. a copy. 
LHe 
NAUTILU 
A MONTHLY 
DEVOTED TO THE INTERESTS 
OF CONCHOL@GISTS. 
ESTABLISHED BY W. D. AVERELL, IN 1886, AS 
(Ryd) “THE CONCHOLOGISTS’ EXCHANGE.” 
OY. 
1 ee ee 
Wools ELL: OCTOBER, 1889. No. 6. 
CONTENTS: 
PAGE. 
RECENT ADDITIONS TO THE UNITED STATES SNAIL Fauna. H. A. Pilsbry. 61 
CRITIQUES AND COMMENTS. ; : i 64 
Notes ON VALVATA (LyoGyRus) Brownul. H. F. Carpenter. . : 5 Ba 
On ANODONTA FLUVIATILIS DILLw. W-:S. Teator. . \ : ; (OF 
THE SHELL-BE4aRING MOLLUSCA OF RHODE ISLAND. Horace F. Carpenter. 69 
Netw PUBLICATIONS. . A ’ ‘ j P ‘ : : : SO gill 
Published by 
H. A. PILSBRY, Editor, Academy of Nat. Sciences, Philadelphia. 
W. D. AVERELL, Manager, Mt. Airy, Philad’a. 
Entered at Philadelphia Post-Office as second-class matter. 
