50 Fossil Corals of Franklin County, Indiana.

FOSSIL CORALS OF FRANKLIN COUNTY, INDIANA.


By David R. Moore.


The distribution of Fossil Corals in Franklin County is confined to the Lower and Upper Silurian ages, and Devonian drift.
For variety in genera and species the large area of the Lower Silurian presents an interesting field.
A few Upper Silurian representatives are found in the localities of outcrops of that age.
Representatives from the Devonian drift form no inconsiderable part of the Palæontology of the County.
The following list is far from exhaustive; but indicative of the extent and variety of ancient Coral life within the bounds of the County; also of progress so far made in the discovery and determination of genera and species.
As Curator of Geology, and especially in the work of preparing this list, I am indebted to other members of the Society for valuable aid.
The authorities exclusively depended upon for descriptions and nomenclature are the Palæontology of Ohio, Vol. II; and the Indiana Geological Reports of 1881-82.

LOWER SILURIAN
Genus CHÆTETES
.
Chætetes dalii, Edwards and Haine. Common.
---- approximatus, Nich.
---- pulchellus, Edwards and Haine.
---- subpulchellus, Nich.
---- discoideus, James.
---- newberryi, Nich.
---- frondosus, D'Orb.
---- ortoni, Nich.
---- corticans, Nich. Parasitic.

Genus FAVISTELLA.

Favistella stellata, Hall.

Genus CONSTELLARIA.

Constellaria antheloidea, Hall. Rare.


Fossil Corals of Franklin County, Indiana. 51

Genus STREPTELASMA.


Streptelasma corniculum,Hall. Plentiful.
----- radicans, Hall.

Genus PALÆOPHYLLUM.

Palæophyllum divaricans, Nich.

Genus COLUMNOPORA.

Columnopora cribiformis Nich. Plentiful.

Genus HIPPOTHOA.

Hippothoa inflata, Hall.

UPPER SILURIAN.
Genus LICHENALIA.

Lichenalia concentrica, Hall.
varieties { parvula.
--------- { maculata.

Genus HALYSITES.

Halysites catenulata, Linn.

Genus FAVOSITES.

Favosites spinigerus, Hall.
----- forbesi var. occidentalis, Hall.
----- favosus, Goldfuss.

Genus ERIDOPHYLLUM.

Eridophyllum rugosum, Edw. and Haine.

DEVONIAN DRIFT.
Genus AULOPORA.

Aulopora arachnoidea, Hall. Parasitic.

Genus FAVOSITES.

Favosites basaltica, Goldfuss.
----- hemisphericus, Hall.

Genus ZAPHRENTIS.

Zaphrentis prolifica, Billings.

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