: 
BOSTON 
JOURNAL OF NATURAL HISTORY. 
Vor. m NON BMBSE. 1840. Xat 
ART. I. "T. MONOGRAPH. OF THE HELICES INHABIT- 
ING THE UNITED ition By Amos Buvsex, M. D. (Con- 
unuta froin 2 — 
serio TI. ir SIMPLE: 
€. — chased, or earl ns: 
29. HELIX INTERNA. 
Plate XXI. fig. 1. 
H. testi convexo-depressi, imperforati, rufi; anfractibus oeto, 
valde. striatis, striis elevatis, crebris, obliquis; aperturá transversali, 
angustà ; labro simpliei, acuto, intus incrassato et bidentato; dentibus 
sani; basi levigato; regione umbilicali impresså. 
* The presence or absence of an umbilical opening is much less to 
be depended on, as a distinctive character for the subdivision of this 
genus, than: I pet it to be when I adopted it in the introdue- 
VOL. IJI. — NO. IV. ‘ ss 
