215 
Preliminary Notes on Cincinnatian Fossils 
Dalmanella bassleri, sp. nov. 
A species of Dalmanella occurs near the base of the exposures 
at Carnestown, Ky., which appears to have been distinctly more 
robust and more convex than Dalmanella emacerata since the 
pedicel valves are always distinctly, though not strongly, convex, 
and the brachial valves, though nearly flat, are sufficiently convex 
toward the beak to make the shallow median depression fairly 
distinct. The radiating striations are numerous but appear 
coarser, and their fasciculate arrangement is more evident. Dal- 
manella emacerata, on the contrary, usually appears only in the 
form of very much flattened shells, even when forming the tops of 
layers of limestone. 
The species from the lower beds at Carnestown often attain a 
large size. Some specimens 27 mm. wide, 22 mm. long, and about 
4 mm. in depth are known. Striations corresponding to the radiat- 
ing striations marking the exterior, are found on the interior of 
both valves, even where the muscular impressions should appear. 
The muscular area of the pedicel valve is distinctly limited postero- 
laterally by the ridges which are a continuation of the short plates 
supporting the short hinge teeth. Anteriorly these ridges soon 
become indistinct. An angulation in these ridges often indicates 
the point of demarcation between the anterior and posterior ad- 
ductor impressions. There is no trace of muscular impressions in 
the brachial valve. A low median elevation divides the posterior 
part of the area where these impressions should occur. Posteriorly 
this elevation fills the lower part of the space between the short crural 
plates, and bears at its posterior end the short cardinal process, 
more or less trilobate posteriorly in some specimens. 
At Carnestown, Ky., this species occurs associated with Callo- 
pora multitabulata and Strophomena trentonensis, between 8 and 
15 feet above the Ohio river. At South Moscow, it is abundant 
immediately above the Callopora multitabulata horizon, about ii 
feet above the Ohio river. It occurs at about the same horizon 
north of Butler, and at Parks Hill. East of Carnestown, it appears 
to occur in the lower part of the Cynthiana formation, and it is 
fairly common east of Florence, Indiana, opposite Warsaw. Far- 
ther south, it appears to occur in the Wilmore bed, belonging to 
the so-called Trenton of Kentucky. The Carnestown specimens 
appear to belong near the top of the Paris bed, forming the top of 
