626 GEOLOGY OF OHIO. 
GENUS ASTEROSTEUS. Newberry. 
Asterosteus stenocephalus, Newb. 
GENUS ACANTHASPIS. Newberry. 
Acanthaspis armatus, Newb. 
GENUS ACANTHOLEPIS. Newberry. 
Acantholepis pustulosus, Newb. 
GENUS LIOGNATHUS. Newberry. 
Liognathus spatulatus, Newb. 
GENUS MACHZRACANTHUS. Newberry. 
Macheracanthus major, Newb. 
iM peracutus, Newb. 
s sulcatus, Newb. 
GENUS CYRTACANTHUS. Newberry. 
Cyriacanthus dentatus, Newb. 
GENUS RoyncHoDUS. Newberry. 
Ehynchodus secans, Newb. 
a Srangens, Newb. 
ote crassus, Newb. 
The above list ig meant to comprise all of the fossils that have been 
described or identified from the Corniferous Limestone of Ohio. A 
considerable number of these are included in the two volumes of Ohio 
Paleontology, already published. Others have been described in the 
reports of other States from Ohio specimens, and still others are species 
that are common to the rocks of this age in various American localities, 
some of them, indeed, belonging to the Old World as well. 
A few statements in regard to the horizons of some of the species will 
be added here. | 
The following fossils are found in Franklin county to have but very 
little vertical range: 
About fifteen feet below the bone-bed, Cystiphyllum Americanum often 
makes up a large part of the rock for four or five feet. 
Eridophyllum Verneuilanum holds very closely to one horizon in Franklin 
county. It is found about three feet below the bone-bed, and is coéxten- 
sive with the formation. Wherever the proper horizon is reached, this 
fossil is found. This horizon has not been identified with that which 
this fossil holds at Sandusky, but it is probably the same. The seas 
seem to have been paved with it at the time when this layer was 
forming. 
