180 GEOLOGICAL SURVEY 
in which I detected O. disparilis and other fossils from this formation. ‘This locality, therefore, 
which I have not seen, is the south-western extremity of the formation in the United States. 
There is great difficulty in pointing out the precise limits of the superficial beds of sand and clay 
of the Pliocene; for in Darlington they run into those of the buhr-stone, towards the North, and, in 
Sumter, on the West, they stand in the same relation, whilst towards the South and South-east, 
they are mingled with the upper arenaceous beds of the P. Pliocene. 
The sandy beds of the buhr-stone, however, when seen, can, in general, be distinguished by the 
red and sienna-colored loam with which they are associated, and the soil derived from them is far 
more fertile. 
List oF Fossits oF THE PLIOCENE oF SouTH CAROLINA.” 
Mammalia. 
Mastodon maximus, Cervus, 
molars and tusk. horns. 
Pisces. 
Carcharodon, Galeocerdo, Saurocephalus, 
Lamna, Hemipristis, Ceelorhynchus. 
Brachiopoda. 
Orbicula lugubris. 
Gasteropoda. 
Dentalium dentalis, Voluta mutabilis, 
3 politum, “  junonia, 
“ thallus, Fasciolaria distans, 
Fissurella redimicula, ff 2 
ff alternata, Fusus quadricostatus, 
Dispotea rugosa, “ cinereus, 
cs corrugata, Ke 2 
ue multilineata, Wy 2 
<C dumosa, Pyrula carica, 
Infundibulum depressum, ff canaliculata, 
Crepidula fornicata, i perversa, 
ee aculeata, se spirata, 
We plana, 4 coronatus, 
if costata, ue papyracea, 
Serpula granifera, Ranella caudata, 
Petaloconchus sculpturatus, Purpura, 
Natica heros, 
“  duplicata, 
“  canrena, 
“  Carolinensis, 
Murex umbrifer, 
Cassis Hodgii, 
Buccinum poreinum, 
3 multirugatum, 
* The names in italics are those of recent species. 
