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Wol. TIT. NOVEMBER, 1889. No. 7. 
CONTENTS: 
PAGE, 
THE VIRGINIA COLONY OF HELIX NEMORALIS. T. D. A. Cockerell. . 73 
COLLECTING LAND SHELLS IN SOUTHERN CALIFORNIA. Edward W. Roper. 77 
WHAT Is A SpEcIES? Charles T. Simpson. 78 
DESCRIPTION OF A NEW SPECIES OF OCINEBRA. F.C. Baker, . : : 80 
HELIX (STENOTREMA) HriRsuTA SAY, ON THE WEsT COAST. : 5 isl 
THE SHELL-BEARING MOLLUsCA OF RHODE IsLAND. Horace F. Carpenter. 82 
GENERAL NOTES. 5 : : é : ; : . - : 5. (se 
PUBLICATIONS RECEIVED . A : : F , : 3 i of eet 
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. 
FOREIGN AGENCIES :—London, Triibner & Co., 57 and 59 Ludgate Hill; 
Berlin, R. Friedlander & Son, 11 Carlstrasse. 
