OF DENISON UNIVERSITY. 85 
ular concentric stri«. Length 14 mm; height 9.5 mm; thickness 8.5 
mm ; beaks 4 mm. from front. 
This species was collected by W. F. Cooper, in the nodules and 
shale at the lowest exposure at Moot’s run, 4 miles west of Granville. 
Although suggesting the genus Pateoneilo strongly we do not see how 
the hinge characters here described can permit this species to fall into 
any known genus. 
Pholadella newherryi, H. and W. 
(Plate III, Fig. 27; Plate IV, Fig. 4.) 
Shell large, elongated, rather flat, more than twice as long as high, 
very short anteriorly, produced and rather narrow posteriorly. The 
lower margin is nearly straight, being rather abruptly curved anterior- 
ly and more gradually posteriorly where it is produced to form an 
acute angle ; posterior margin oblique, forming with the upper a very 
large angle; hing-line concave, shorter than the length of shell; the 
anterior margin short, nearly straight; umbones very prominent, beaks 
incurved over the hinge-line ; post-umbonal ridge quite prominent, 
curved and becoming less distinct to its intersection with the lower 
posterior angle ; post-umbonal slope quite abrupt near the beak, but 
becoming less so posteriorly ; anterior to this ridge the surface is 
marked by numerous radiating thread-like striae, which seem almost to 
lie upon rather than to form a part of the shell ; these striae ab- 
ruptly cease at a point on the lower margin one-fifth the length 
from the anterior ; shell otherwise covered by strong concentric lines 
and folds of growth. Prominent characters are the prominent and el- 
evated umbones with the concave hinge line, oblique posterior margin 
and radiating striae. 
Length 90 mm; height at beak 35 mm; height posteriorly 30 
mm; beak distant from anterior margin 13 mm. 
Oiir specimens are apparently little distorted and are much {ys) 
larger than those figured by Meek from Rushville. There can be no 
doubt of the identity, but our specimens show Meek’s types to have 
been much more distorted than Meek’s P. (Sedgwickia ?) obliqua pro- 
posed for the fragment figured. The species is apparently restricted 
to a rather narrow zone below the shale immediately underlying congL 
