FRANKLIN COUNTY. 619 
widely removed places, while others are peculiar to the locality in which 
they are found. Some fossils are abundant through the whole extent of 
the formation, even entering it from seas of an earlier age. Others are 
equally abundant in the one limited horizon which they occupy. Through 
a foot or two of the limestone they are everywhere shown, but no frag- 
ment or trace is found above or below. 
As in all other assemblages of fossils, many species are established on 
a very few specimens—oftentimes on but a single one. The wealth of 
the formation in this department is not yet appreciated in any adequate 
degree. When the same measure of interest and labor has been given to 
it that has been spent in the Cincinnati formation, for example, its list 
of species will be several times greater than it now is. 
One strong hold upon our interest this formation possesses, in the fact that 
it contains the earliest undisputed remains of land vegetation and vertebrated 
animals that are found in the rocks of the continent. Its tree ferns and its 
fishes are altogether new types inthe world. Special interest is drawn to 
these earlier forms on account of their bearing on questions of derivation. 
A catalogue of fossils described from this formation, is here appended. 
No name is introduced except upon the authority ot the paleontologists 
of the survey—I’. B. Meck, Esq., and Profs. R. P. Whitfield and H. A. 
Nicholson. A large number of the species are represented in the collec- 
tion of the Ohio Agricultural and Mechanical College. To the lists are 
added the generic names of a few well-marked, but undescribed forms, 
which have been recognized as distinct species by the authorities named 
above 
CATALOGUE OF THE DESCRIBED FOSSILS OF THE CORNIFER- 
OUS LIMESTONE OF OHIO. 
PLANTS. 
Fucoids abundant on surfaces of upper beds at State quarries, Columbus. 
Spirophyton—cauda galli? 
GENUS CAULOPTERIS. 
(Tree ferns.) 
Caulopteris antiqua, Newberry. 
C. peregrina, Newberry. 
GENUS LEPIDODENDRON. 
(Club mosses.) 
Lepidodendron, Gaspianwm ? Dawson. 
GENUS DADOXYLON. 
(Ancient pines.) 
Dadoxylon Newberryi, Dawson. 
