402 Monograph of the Species of 
fifth, broad and considerably elevated, seen at the 
very depth of the cavity of the aperture as we look 
down into it, opposite to the tooth of the transverse 
lip; umbilicus small and open. 
Length y i, of an inch; breadth 1, of an inch. 
"This very distinct species was sent to me by Pro- 
fessor E. Foreman, of Baltimore, who seems to have 
found it plentifully. It comes nearer to P. rupicola, 
than to any of Mr. Say’s species. 
PUPA MILIUM. 
Plate III. fig. 23. 
P. testà minutissimà, ovali, castaneà ; anfractibus quatuor convexis, 
obliqué statis; apertura cordati, dentibus sex, compressis armata, 
quorum duobus labio affixis. 
. Shell minute, of a E a form, color 2 
light-chestnut ; whorls four or somewhat more, ob- 
viously wrinkled obliquely, rather convex; apex 
bluntly rounded; suture deep; aperture half the 
width of the last wha heart-shaped, the apex being 
at the right posterior angle; the transverse margin is 
nearly direct ; the outer lip is scolloped by an inden- 
tation of the lip; the remainder of the margin is 
regularly arcuated ; lip white, slightly everted ; throat 
with six teeth, two of which are on the transverse 
lip, equidistant ; one, with a tubercle at its base; is 
on the middle of the columella, and nearly at right 
angles with the preceding, and is the largest ; à fourth 
is on the indenture of the outer lip, directed between 
the two on the transverse lip; and two smaller ones 
more retired within the shell, are equidistant between. 
