304. GEOLOGY OF OHIO. 
crinus O. Nealli, Hall, and Poteriocrinus caducius, Hall, both of which, as 
well as the form named above, were discovered J. Kelly O’Neall, Esq., of 
Lebanon. 
The most valuable single section, however, remains to be named ina 
branch that comes directly down from Morris’s Hill, and which enters 
he Little Miami opposite the mouth of Ceesar’s Creek. Its value lies in 
he fact that, starting at the river from the summit of the Cincinnati 
section, it completes the series to the Clinton Limestone (Upper Silurian) 
in a short course, almost every foot of which is laid open for examina- 
tion. Attention has been already called to this section in the general 
discussion of the Cincinnati Group, and use has been made of it in de- 
termining the thickness of the Blue Limestone series. 
The vicinity of Waynesville, though giving a less extended section, 
has been found wonderfully prolific in fossils. The smaller trilebite, 
especially, Calymene senaria, has been found here in greater numbers 
than anywhere else. The collection of Israel: Harris, Hsq., of Waynes- 
ville, is, doubtless, the finest ever made in this country in this particular 
fossil. It includes not less than one thousand specimens. In this neigh- 
borhood, also, the rare fossil T'rochoceras ? Baert, Meek, has been found. A 
single specimen was obtained from a piece of flagging that had long been _ 
laid in one of the sidewalks of the main street of the village. The only ~ 
other points in the State where it is now known to occur are Camden, 
Preble county, and Clarksville, Clinton county. The specimen upon 
which the species was established came from Richmond, Ind. 
On the western side of the county some of the tributaries of Clear 
Creek furnish fine ground for gathering fossils, exposing the same por- 
tion of the series already referred to. ? 
Morris’s Hill, already named as the highest elevation measured within 
the county limits, contains a finer show of two corals that mark the junc- 
tion of the Lower and Upper Silurian than is elsewhere found. These 
corals are a species of Tetradiwm (T. fibratum ? Safford) and a Stromatopora. 
Both occur in massive forms and in great abundance. 
CLINTON LIMESTONE. 
© 
The Clinton Limestone, the next formation in ascending order, occurs 
in all of the outliers of the Cliff Limestone that are found in the county, 
and to which attention has already been called. All of the characteris- - 
tic peculiarities of this formation are here shown with great distinctness. 
Its lower beds are of a sandy texture, and give to it the local name of 
sandstone. It will, however, be borne in mind that no silica, or, at least, 
no notable portion of silica, enters into its composition. It is a lime 
