Description of 
al 
hy te 8 = 
some Nao Spies of Post Sls . 
“Shell subulat 5 eaperfonae, plished very thin; apex obtuse ; 
sutures very small whorls ——, flat; columella smooth ; mouth 
over ae are. 
ooo -. Breadth ‘04 of jah inch. 
emarks.—This pretty little species is the smallest of the Pa- 
sithee that I have seen. Its mouth is acutely angular above, 
rounded below, and is about ‘05 of an inch in length. The co- 
| lumella is somewhat thickened at base, and the outer lip is sharp. 
{ts whiteness and polish, in which I believe it exceeds all the other 
fossils from Claiborne, give it an elegant appearance. 
P. cancellata. Pl. 1, fig. 2. : 
P. testa turrité, subtenui, polita, imperforata, cancellata ; apice 
acuta; anfractibus , convexis; suturis profundis; columella 
levi; apertura sub-elliptica. 
Shell turrited, somewhat thin, polished, imperforate, cancellate ; 
apex acute; whorls , convex; sutures deep; columella 
smooth ; mouth sub-elliptical. 
Length 3. Breadth -15 of an inch. 
Remarks.—It is probable that this beautiful little species at- 
tains a greater size, as I have a fragment of a specimen, the 
breadth of which is ‘2 of an inch; it may therefore be regarded 
as the largest species of this genus from Claiborne. The mouth 
is rounded below and angular above, and about ‘1 of an inch in 
length. The transverse strie are larger than the longitudinal 
ones, and make the whole surface of the shell beautifully can- 
cellate, 
P. elegans. Pl. 1, fig. 3. 
, P. testa subulata, transverse sulcata, imperforata, subcrassa, po- 
lita ; apice acuta; anfractibus nonis, planulatis ; suturis minimis ; 
ultimo anfractu ad basim striato ; columella levi; apertura sub- 
elliptica, sub-effusa. : 
Shell subulate, transversely sulcate, imperforate, somewhat 
thick, polished ; apex acute; whorls nine, flat; sutures very 
small ; last whorl striated to the base ; columella smooth ; mouth 
| sub-elliptical, somewhat effuse. 
Length 3. Breadth +1 of an inch. 
| : Remarks.—This pretty little shell has five strie on each whorl, 
| except the last, on which there are fifteen, those near the base be- 
Ing much smaller than the others; but as I have only one speci- 
