Description of some New Species of Fossil Shells. 93 



Shell subulate, imperforate, polished, very thin; apex obtuse ; 



sutures very small ; whorls , flat ; cokimella smooth ; mouth 



ovate. 



Length . Breadth -04 of an inch. 



Remarks. — This pretty little species is the smallest of the Pa- 

 sithefB 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. 

 Its 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. 3. 



P. testa turrita, subtenui, polita, imperforata, cancellata ; apice 



acuta ; anfractibus , convexis ; suturis profundis ] columella 



Isevi ; 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 strias 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 lagvi ; 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 strias 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- 



