268 
PALEONTOLOGY OF NEW YORK. 
Modiola (Mytilops) metella. 
PLATE XXXIII, FIGS. 23, 24; AND PLATE LXXXVII, FIG. 9. 
Modiola metella, Hall. Prelim. Notice Lam. Shells, etc., pt. 2, p. 1. 1869. 
Mytilops (Modiola) metella, Hall. Pal. N. Y., vol. v, pt. 1. Plates and Explanations: PI. 33, figs. 23, 24. 
Jan., 1883. 
Shell large; body narrow elliptical, sub-arcuate, obliquely truncate on the 
anterior dorsal side ; length more than twice the height; ventral margin 
gently curving, nearly straight for three-fourths of the length, thence 
abruptly rounded at the posterior extremity; dorsal margin very gently 
curving to the extremity of the hinge-line. 
Valves equal, depressed-convex at the posterior end, becoming gradually 
more convex to a point anterior to the middle of the length, and gibbous in 
the umbonal region. 
Hinge-line oblique, about equal to the height of the valve. Beaks small, 
appressed. 
Test thin, marked by concentric strife. 
Ligamental area marked by two slender grooves. Other interior characters 
unknown. 
A specimen has a length of 57 mm., height 25 mm., and hinge-line 24 mm. 
This species differs from M. pmcedens in its larger form, w;hich is less 
expanded posteriorly, less angular and gibbous along the umbonal slope, and 
without radii on the surface so far as can be determined in the specimens. 
Formation and localities. In a conglomerate of the Chemung group, at 
Panama, and in a boulder of similar rock on the road from Ellington to Cherry 
creek, Chautauqua county, N. Y., and at Warren, Pa. 
