256 NEW FOSSIL SHELLS 
A. TuRBINATUS, PL. 36. Fic. 56. 
A, testé ovato-comed, crassd, levi, sub-perforatd; spird breviusculd, conicd, obtusd; sutwris parvis, linearibus; anfractibus 
quinque, plonulatis; anfractu ultimo .sub-angulato; basi levi; perforatione minima; apertura ovata, sub-effusd; plicd columellari 
magna, acutd. 
Shell ovately conical, thick, smooth, sub-perforate; spire rather short, conical, obtuse; sutures small, linear; whorls 
five, flattened; last whorl somewhat angular; base smooth; perforation very small; mouth ovate, sub-effuse; fold on 
the columella large, acute. 
Length .12. Breadth .08 of an inch. 
Remarks.—The fold on the columella is placed about the middle. It can scarcely be 
seen on a front view; but when the shell is placed obliquely, it appears very large. The 
mouth is acutely angular above, and rounded and somewhat effuse below. On one 
specimen I have observed a small impressed transverse line near the upper suture, but 
my other ones want it. 
This little shell, though without any conspicuous characteristics, does not resemble 
any of our deseribed species. 
A. aneuLatus, Pu. 86. Fia. 57. 
A. tesid subulatd, inferne ovatd, crassa, imperforatd, levi; spird attenuata, conicd, mamillatd; suturis profundis; anfrace 
tibus sex, planulatis, prope sutwram inferiorem angulatis; anfractu ultimo angulato; basi levi; apertwrd pared, subellipticd; 
plicd columellari obtusd, obliquié. 
Shell subulate, ovate below, thick, imperforate, smooth; spire attenuate, conical, mamillate; sutures deep; whorls 
six, flattened, angulate near the lower suture; last whorl angular; base smooth; mouth small, sub-elliptical; fold on 
the columella obtuse, oblique. 
Length .12. Breadth .05 of an inch. 
Remarks.—The mouth is nearly elliptical. The angle on the lower part of the 
whorls is only visible on the inferior ones. Nearer the apex, it becomes obsolete, or is 
covered by the succeeding whorls. 
This shell is not unlike the A. melanellus, Lea, but differs from that species in the 
angular whorls, smaller size, and want of an umbilicus. 
A. GLANS, PL. 36. Fic. 58. 
A, test sub-ovatd, ten, imperforatd, levi, glabrd; spird ovato-conicd, brevi, mamillatd; sutwris profundis; anfractibus 
atuor, minime convexis, ad sutwram superiorem sub-canaliculatis; anfractu ultimo rotundato; basi lavi; aperturd ovata, 
effusd; plicd columellari parvd, oblaqua. 
Shell sub-ovate, thin, imperforate, smooth, glabrous; spire ovately-conical, short, mamillate; sutures deep; whorls 
four, very slightly convex, sub-canaliculate at the upper suture; last whorl rounded; base smooth; mouth ovate, very 
effuse; fold on the columella small, oblique. 
Length .10. Breadth .05 of an ineh. 
Remarks.—The mouth is very effuse below; so much so, indeed, that it appears to 
have the rudiments of a canal. It is acutely angular above. The fold on the columella 
is obtuse, rising abruptly on the upper part and declining gradually on the lower. 
This little shell, from its ovate outline, and the form of its fold, should perhaps be 
placed in the Tornatella, but the limits of these two genera are so indistinct that it is 
difficult to decide where the boundary between them exists. I have felt the same doubt 
with respect to several of the following species, as the A. sculptus, nitens, &c. 
