Preliminary Notes on Cincinnatian Fossils 211 
abundant at this horizon in Ohio and Indiana. It occurs also in 
the Liberty bed. 
The type specimen of Protarea vetusta consists apparently of a 
succession of lamella? vaiying from i to 2 millimeters in thickness, 
and more or less free from each other in places. There are usually 
about 5 corallites in a width of 5 millimeters, although sometimes 
the corallites are wider. The vertical tubules between the coral- 
lites are fairly distinct under a lens. The calyces are rather deep, 
and the septae scarcely reach halfway to the center. Protarea 
vetusta was described from the Trenton at Watertown, New York. 
Leptaena richmondensis, nom. nov. 
{Plate IV, Figs. lO A, B.) 
The typical Lepteena rhomboidalis is regarded as an Upper 
Silurian form, originally found as an erratic specimen. The 
concentric wrinkles are deep, fairly continuous, and the interven- 
ing concentric folds are stronger. 
The typical forms of Lepteena richmondensis were found in the 
upper part of the Waynesville bed, at Madison, Ind. It is a com- 
mon fossil in the upper or Blanchester division of the Waynesville 
in Ohio and Indiana, and in the upper part of the Whitewater, but 
it occurs also in the intervening horizons and is found fairly low 
in the Waynesville, though not at the base. Compared with 
Strophomena rhomboidalis, the concentric wrinkles are usually 
less numerous, less deep, especially toward the beak, and the 
radiating plications are broader, with narrower intervening grooves. 
The shell is relatively wider, and in most specimens the top of the 
pedicel valve is comparatively flat. 
This species was figured by Meek as Strophomena rhomboidalis 
var. tenuistriata. Leptcpna tenuistriata, Sowerby, is figured as 
having much more numerous radiating striations, and a different 
form. 
Leptaena richmondensis — precursor, yar. nov. 
{Plate IV, Fig. II.) 
In the Arnheim bed at Arnheim, and at numerous other localities 
in Ohio, and still more commonly at the same horizon in Kentucky, 
a variety of Lepteena richmondensis is found which varies chiefly 
in having the top of the pedicel valve more convex. The shell 
