110 Tertiary Strata of the Atlantic Coast. 
Pholas costata, Lam. 
Venus alveata, Conrad. 
Pectunculus pectinatus, Lam. 
circularts, Conrad../Cyrena carolinensis. 
Cardita granulata, Conrad. 
Amphidesma transversa, Say. 
Lucina divaricata, Lam. 
Strigilla carnaria, Turton. 
Mysia rotundata ? 
Amphidesma inequale, Say. 
Cardita tridentata, Say. 
os 
Corbula contracta, Say. 
cuneata, Say. + 
Plicatula marginata, Say. »- 
Rangia cyrencides, Des Moulins. 
Astarte concentrica, Conrad. 
Nucula acuta, Conrad. 
Panopea reflexa, Say. 
Ostrea virginiana, Gmel. 
Venus deformis, Say. 
List of fossil shells of the Newer Pliocene on the Potomac. 
Crepidula convexa, Say. 
glauca, Say. 
Fusus cinereus, Say. 
Nassa obsoleta, Say. 
trivittata, Say. 
Natica duplicata, Say. 
interna, Say. 
Ranella caudata, Say. 
Scealaria. | 
Turritella alternata, Say. 
Arca transversa, Say. 
ponderosa, Say. 
Corbula contracta, Say. 
Cytherea Sayana, Conrad. 
Mactra lateralis, Say. 
Mya arenaria, Lin. 
Mytilus hamatus, Say. 
Nucula limalula, Say. 
acuta, Conrad. 
Pandora trilineata, Say. 
Petricola pholadiformis, Lam. 
Pholas costata, Lam. 
Sanguinolaria fusca, Conrad. 
lusoria, Conrad. 
Solecurtus caribeus, Blain. 
Solen ensis, Lin. 
Venus mercenaria, Lin. 
Rangia cyrenoides, Des Moulins. 
Ostrea virginiana, Gmel. 
The species in the preceding lists printed in italics, have not hith- 
erto been found recent. 
The foregoing lists of species shew how much the fossils of syn- 
chronous strata may differ specifically, without being so remote from 
each other as to induce the naturalist to expect much diversity of 
species. 
Other localities of the newer Pliocene in North Carolina have 
been identified by a series of fossils sent by Prof. Elisha Mitchell, 
of Chapel Hill, to the Academy of Natural Sciences. ‘To this for- 
mation also, belong the beds of oyster shells in New Jersey, on the 
Eastern shore of Maryland, in Virginia, &c., and these were depos- 
ited exclusively in lagoons whilst the former class of shells are either 
of estuary or oceanic origin. 
