TERTIARY FORMATIONS, 211

Phacoides contractus Say.
Phacoides cribrarius Say.
Rangia clathrodonta Conrad.
Spisula magnoliana Dall.
Thracia conradi Couthouy,

Venericardia granulata Say.
Venericardia tridentata Say.
Venus rileyi Conrad.

Yoldia levis Say.

Right Side of Roanoke River, 3 1-2 Miles Below Palmyra.—Fossil-
iferous blue sandy clay belonging to the St. Marys formation rises about

7 feet above high water. It may be the same layer exposed at Palmyra,
though it contains a somewhat different assemblage of fossils.

FOSSILS FROM 3} MILES BELOW PALMYRA. LANDING.

CRUSTACEA : Mulinia congesta Conrad.
Balanus concavus Bronn. Nucula provima Say.

GASTROPODA : Ostrea compressirostra Say.
Crepidula fornicata Linné, Phacoides crenulatus Say.

PELECYPODA : Yoldia laevis Say.

Leda acuta Conrad.

SECTION AT UPPER END OF ROANOKE RIVER BLUFF AT HAMILTON, JUST

s ABOVE LANDING.
Pleistocene:

Clay sandy loam with some sand layers and some layers of pure
CARY 555 gcbihi ae gus Cte eine Ce he a ee oe he oe ee 12

Miocene (St. Marys) :

Lens of fossiliferous sandy clay which at greatest thickness is
about 3% feet. Consists in some places of indurated shell frag-
ments. Ensis, Nucula, and Leda are the most abundant fossils. 0-34%

Greenish-gray argillaceous sand containing several fossil bands
similar to above and. some isolated shells........ Weg Diy in eh ee 13

Freer.

In several places in the Hamilton Bluffs, especially in the lower por-
tion of the bluff, many layers of shell fragments occur. In one place a
layer was seen largely composed of fragments of Venus.

FOSSILS FROM HAMILTON BLUFFS.

GASTROPODA: ; Corbula inaequalis Say.
Cadulus thallus Conrad. se Ensis directus Conrad.
Calliostoma mitchelli Conrad. Gemma trigona Dall.
Calliostoma philanthropus Conrad. Glycymeris subovata Say.
Calliostoma virginicum Conrad. Leda acuta Conrad.

Olivella nitidula Dillwyn. Mulinia congesta Conrad.
Polynices heros Say. Nucula proxima Say.
Scalaspira strumosa Conrad. Ostrea sculpturata Conrad.
Teinostoma nanum H. C. Lea. Panopea americana Conrad.
Tornatina canaliculata Say. Pecten eboreus Conrad.
Turbonilla interrupta Totten. Phacoides crenulatus Conrad.
Turritella variabilis Conrad. ~~ Plicatula marginata Say.

PELECYPopA: Venericardia granulata Say.
Anomia simpler d’Orbigny. Venus rileyi Conrad.

Arca improcera Conrad. Yoldia laevis Say.