p.1

Edmondii? subangulata, Hall, Pal. of N.Y. vol. 1 p. 156 pl. 35 fig. 2.
P 3p 483 & p 501

Subelliptical, with the anterior narrowed and slightly projecting; umbones very prominent, subangular, with an obtusely angular elevation extending thence to the posterior ventral margin; hinge line short, deeply grooved near the margin for the insertion of the ligament; surface nearly smooth, or marked by fine striae which become undulating. ridges upon the posterior slope.

L. 2.2 H 1.3