2i8 
A ug. F . Foerste 
Dalmanella jugosa, James. r: 
(Plate IF, Figs. l6 A, l6 B.) i 
Paleontologist, no. 4, p. 31, 1879- I 
This species was described by James from the upper beds of the 1 
Cincinnati Group, an expression which he used for the strata now i ; 
included in the Richmond formation. His description includes j - 
two forms: one with a quite sharp mesial ridge on the pedicel 
valve, usually occurring low in the Waynesville bed in Clinton and |l i 
neighboring counties in Ohio; and another with this mesial ridge | 
but little conspicuous above the regular prominent convexity, j 
Only the latter is abundant in the Richmond group over a wide 
area, and the latter is here regarded as the type. It is abundant \ 1 
in the Waynesville bed, especially below the Blanchester division I 
of this bed, both in Ohio and Indiana. Very typical specimens j 
occur at Oxford and Clarksville, Ohio. |i 
Dalmanella meeki, Miller. | 
Cincinnati Quarterly Journal of Science, vol. 2 , p. 20, 1875. | 
Miller, in describing Orthis meeki, not only copies verbatim 
the description of Orthis emacerata as identified by Meek in volume Ij 
i of the Ohio Paleontology, but specifically states that figs. 2a to i 
2g on plate 8 of that volume are regarded as illustrating typical f 
specimens of Orthis meeki. Therefore, the specimens figured by \ 
Meek must be considered as the types of Orthis meeki. Unfor- i 
tunately, these types can not be found. j 
Meek states that the typical form of Orthis emacerata, as identi- 1 
fied by him, occurred at an elevation of 250 feet above the Ohio i 
river, at Cincinnati, and on other pages of the same volume he | 
states that Orthis multisecta ranges up to 200 feet above low water i 
mark, and that Orthis bellula, Orthis ella, Orthis fissicosta, and 
Orthis plicatella occur At ^00 feet. There is nothing to indicate that | 
the form he considered typical was at all common or had any consid- 
erable vertical range, although he had other specimens, differing j 
very little, from higher horizons, both at Cincinnati, and in But- | 
ler county. This suggests that some large form of Orthis multi- i 
secta may have formed the basis of Meek’s statement. This form 
should occur somewhere near the top of the Eden, and need not 
be common. 
