Notes on Cincinnatian Fossil Types 
305 
northeast of Liberty, in Casey county. Here the following interest- 
ing section is shown : 
New Albany Black shale. 1 ft. 
Greenish clay over phosphatic sandy layer, regarded as the base of 
the Devonian exposures here 6 in. 
Argillaceous rock, cracking into rubble, unfossiliferous, regarded as 
equivalent to the Saluda member of the Richmond 27 ft. 6 in. 
Calcareous strata with Tetradium abundant and massive, and with 
a few specimens of Stromatocerium 1 ft. 2 in. 
Blue limestone with Platystrophia and Hebertella sinuata 10 in. 
Calcareous strata with Columnaria vacua and Beatricea undulata .... 1 ft. 
(The overlying fossiliferous strata are regarded as equivalent to the 
coral zones in the lower part of the Liberty member in 
Marion county, and farther northward.) 
Argillaceous strata, unfossiliferous, regarded as approximately 
equivalent to the Waynesville member of the Richmond, the 
base of this member being not exposed here 30 ft. 
A small exposure of the Arnheim member of the Richmond, 
containing Leptaena richmondensis precursor, is indicated on Damron 
creek, in the northeastern part of Adair county. Platystrophia 
ponder osa occurs at a lower horizon in strata regarded as equivalent 
to the upper part of the Maysville. The Leptaena occurs within 12 
inches of the base of the Devonian limestone which here intervenes 
between the top of the Arnheim and the base of the New Albany 
Black Shale, so that only the basal part of the Richmond is pre- 
served here. 
16. Lingula covingtonensis, Hall and Whitfield 
{Plate III, Fig. 7) 
1875. Lingula covingtonensis Hall and Whitfield, Pal. Ohio, 2, p. 67, Plate 1, Fig. 1 
1910. Lingula covingtonensis Foerste, Bull. Sci. Lah. Denison TJniv., 16, p. 22, 
Plate 5, Fig. 5 
The type of Lingula covingtonensis, numbered 139 in the James 
collection at Chicago University, was figured, enlarged, in the 
Bulletin of Denison University, cited above. The type presents the 
interior of the upper valve, partly exfoliated. It is labelled as 
coming from Kentucky, opposite Cincinnati, and was obtained in 
the upper part of the Cynthiana formation, in strata described by 
Orton as the River Quarry beds. 
These River quarry beds are not identical with the Point Pleasant 
beds of Orton. At the time Orton defined his Point Pleasant beds. 
