Pupa found in the United States. 399 
It is remarkable for its minuteness, its tapering 
form, and its very oblique, oval aperture: The simi- 
larity between it and the “Turbo cary'chiwm, of Mon- 
tagu (Test. Brit. 339. Suppl. pl. xxn., fig. 2.), which 
is the Cary'chium minimum of Leach and Pfeiffer, is 
almost perfect. 
I 
PUPA CONTRACTA. 
Plate III. fig. 22. 
P. testå alba, ventricoså, -obtash ; ; anfractibus quinque convexis ; 
aperturà sub- triangulari, expansa ; labio ! dente magno excavato; labro 
revoluto, sinuato ; dente altero in faucibus profundo, 
* Shell dextral, short, subovate, white; apex ob- 
tuse ; whorls five ; umbilicus distinct ; aperture irreg- 
ularly orbicular, complete, thé lamina of the labium 
being elevated above the surface of the preceding 
whorl, and joining the extremities of the labia ; la- 
bium with a large, elongated, prominent tooth, which 
. is concave on the side towards the labrum ; labrum 
bidentate; a large tooth or fold far within the throat, 
caused by the fold of the umbilicus ; throat much 
contracted by the large tooth " the labrum into the 
form of a horseshoe. 
. ** Total length less than one tenth of an i iehi 
- “This is a short, wide species, sufficiently distinet 
from others, and readily distinguished by the lamina 
of the labrum being much elevated, and by the mag- 
nitude of thé tooth of the labium. This species 
probably belongs to the genus Carycuium.” (Say. 
Journ. Acad. Nat. Se., VI. 374.) 
Mr. Say found it in Virginia. It has since btéfod 
