24 
superficial soil, and elevated above the level of the sea, on the 
coasts of New Jersey and Long Island, are referrible to the 
Upper Marine formation. 
TURBINELLA PYRULOXDES. Tab. 10, fig. 1. 
Pyriform, ventricose, smooth; with obscure spiral striae on 
the inferior half of the body whorl; spire very short; apex 
slightly mammillated; columella with 4 distant oblique plaits. 
Locality. Claibo rne, Alab.; very abundant. Middle Ter. 
Mr. Vanuxum obtained this species in Georgia, replaced 
by silex and translucent; it accompanied a species of Cytherea 
which also occurs at Claiborne, and probably the fossils of these 
silicious beds, when further examined, will enable us to refer 
them to the middle tertiary. This formation extends west of 
the Mississippi, as I have lately ascertained by means of spe- 
cimens of ferruginous marl, sent, by Judge Bry of Louisiana, 
from a locality on the Ouachitta river. They were presented 
to the American Philosophical Society, and are almost entire- 
ly composed of a species of Corbula , very common and charac- 
teristic in the sandy deposits at Claiborne, and hardly to be 
distinguished from C. angustata of Sowerby, figured in the 
Transactions of the Geological Society, 
ANCILLARXA ALTILE. Tab. 10, Jig. 2. 
Obovate acute; body whorl ventricose; spire rather abruptly 
contracted, subulate towards the apex which is acute; suture 
obsolete; columella callous, much thickened and projecting 
above. 
Locality . Claiborne, Alab. Middle Tertiary. 
The genus Jlncillaria appears to be very characteristic of the 
equivalents of the London Clay , most of the known species ap- 
pertaining to that formation. In the superior beds I have not 
detected a single species, nor does any exist upon our coast. 
