28 
tooth, curving downwards so as nearly to reach the termination of 
the labrum ; umbilicus open, exhibiting the volutions. 
Greatest transverse diameter nine-twentieths of an inch. 
This resembles the tridenfata, A^ob., but the upper tooth of the 
labrum is much inflected, the spire is more elevated, and the size 
is less considerable ; in the former character it coincides with H. 
injieda, JSTob., but that shell has the umbilicus closed. 
Presented to the Academy by Messrs. Hyde and Mason, who 
found it in the vicinity of Philadelphia, where it is not uncommon. 
Since the above was written, I received a specimen from Mr. 
Stephen Elliott, of South Carolina, fully equal in size to the 
tridenfata. 
H. EGENA. — Shell convex, polished ; whorls five, not distinctly 
wrinkled, rounded ; aperture rather narrow, transverse j labrum 
simple, at its inferior extremity terminating at the centre of the 
base of the shell ; umbilicus none, but the umbilical region deeply 
indented. 
Breadth more than one-tenth of an inch. 
This shell was found by Mr. John S. Phillips on the banks of 
the Delaware River, about ten miles from Philadelphia. It is 
much more elevated and not so broad as H. arborea, Ao6is.; the 
aperture also is of a different shape. It is much broader than the 
H. chersina, JVob. 
Bulijius multilineatus. — Shell conic, not very obviously 
wrinkled ; whorls not very convex, yellowish white, with trans- 
verse entire reddish brown lines ; a blackish subsutural revolving 
line ; suture not deeply indented, lineolar ; apex blackish ; 
umbilicus small, surrounded by a broad blackish line ; columella 
whitish ; labrum simple, blackish. 
Length less than seven-tenths of an inch. Greatest breadth 
less than seven-twentieths of an inch. This species was found by 
Mr. Titian Peale on the southern part of East Florida. 
PoPA FALLAX. — Shell turreted, pale horn color ; wrinkles 
rather obtuse, hardly prominent ; suture rather deeply impressed ; 
volutions nearly seven, a little convex ; apex somewhat obtuse ; 
aperture unarmed, suboval, truncated above by the penultimate 
whorl, less than one-third the whole length of the shell ; labrum 
nearly transverse, color of the exterior part of the shell ; colum- 
ella reflected, rectilinear, longitudinal, forming an obvious though 
