76 
BULLETIN OF THE LABORATORIES 
Grammy sia ventricosa, Meek. 
Fine typical specimens are found in the Allorisrna layer below 
conglomerate II, especially at Rushville. See Pal. O. Vol. II; also 
doubtfully identified from the free-stone below this horizon, at Newark 
and Granville. 
Grarnmysia sp. 
(Plate XII, Fig. 3 ,) 
This small species has somewhat the aspect of an Edmondia and 
has not been carefully studied. From the nodules at Moot’s run. 
Mocliomorplia hyalea. H. ? 
(Plate X, Fig. 4.) 
This identification is provisional. Our specimens are shorter and 
have more the a^ect of a Grarnmysia. The species was derived from 
Granville, however, and the form here figured approaches it as nearly 
as any seen. Freestone of middle Waverly. 
Edmondi a depressa, H. 
(Plate VIII, Fig. 5 ) 
Shell thin, subquadrate, only moderately convex, umbones prom- 
inent, beaks incurved, approximate, near the front margin. Hinge 
line straight, equal to over one-third the entire length ; post umbonal 
ridge rather prominent, extending to postero-ventral angle ; post-um- 
bonal slope bisected by an indistinct ridge extending from the umbo; 
pre-umbonal slope narrow ; posterior outline nearly straight, meeting 
the hinge line at an angle of about ii[°, passing into the lower out- 
line by an abrupt curve; lower line nearly parallel to the hinge, curv- 
ing very rapidly to its junction with the rather straight front margin, 
which makes nearly a right angle with the hinge. Surface covered 
with fine concentric striae and coarser folds parallel to the margin. 
