2o8 The American Geologist. October, 1903 
The name of this division has been taken from Liberty, 
Indiana, where these strata have been quarried on the banks o\ 
Silver creek. These strata are also well shown along the banks 
of the Whitewater river from Richmond, Indiana, south for 
several miles. The vicinity of Dayton, Ohio, Flat Fork in 
Warren county, and Cowan's creek in Clinton county, Ohio, 
also furnish good exposures ; also Oxford, Ohio. 
The Plcctambonitcs sericeus (Sowerby), which is a very 
abundant brachiopod in the Utica at Cincinnati, re-appears in 
this division, — it is not found in the intervening Lorraine, — 
■occupying a limited vertical range, but occurring in countless 
thousands. So far as the writer's observation has gone, this is 
the only horizon for it in the Richmond. While perhaps not 
restricted to this division, the Strophomena planumbond* 
(Hall) is exceedingly abundant and a very characteristic fossil. 
It is in this division that the Rliynchotrcma capa.v (Conrad) 
attains its maximum in point of numbers. Most of the crinoids 
which in "The Geology of Cincinnati" are given as occurring 
in the Lower Richmond really come from this division. Dinor- 
this subquadrata (Hall) makes its appearance with Hebcrtella 
insculpta (Hall) and continues through this and the next di- 
vision. Characteristic Bryozoa have not yet been determined. 
3. The Whitewater or Homotrypa wortheni beds. 
In this division the strata usually present a roughish, con- 
cretionary, nodular appearance, both the limestone and the 
shale. The color is usually brownish or yellowish, though at 
some localities bluish. The limestone layers, often more or less 
impure, are seldom over two inches thick and generally less. 
The thickness of this division is from forty-five to fifty feet. 
These beds are well exposed in the banks of the Whitewater 
river, — whence the name, — at the north end of Richmond, In- 
diana, and between the bridges ; numerous exposures are also 
found along Short creek, three miles south of Richmond, Ind. 
The C, H., & I. R. R. made a long cut through these layers, 
which are here bluish, a short distance west of Oxford, Ohio : 
the debris was thrown out in a long bank on the south side of 
the railroad, which long ago received from local collectors the 
suggestive name "Coral Bank." The trepostomatous Bryozoa 
were formerly considered corals. In the vicinity of Dayton, 
* One of the most involved questions in paleontologlcal nomenclature is 
suggested by this name. It is discussed by a note at the end of this paper. 
