388 PALAEONTOLOGY OF NEW YORK. 
Edmondia obliqua, n. sp. 
PLATE LXIV, FIGS. 15, 23 (16?) ; and PLATE XCV, FIGS. 5-8. 
In part Edmondia P/iilipi, Hall. Prelim. Notice Lamellibranchiata, 2, p. 90. 1870. 
“ “ “ “ Pal. N. Y., vol. v, pt. 1. Plates and Explanations: PI. 64, figs. 9-18. 
1883. 
“ “ Bnrlingtonensis (White and Whitfield), Hall. Prelim. Notice Lamellibranchiata, 2, p. 
90. 1870. 
“ “ “ “ “ Pal. N.Y., vol. v, pt. 1. Plates and Ex¬ 
planations : PI. 64, figs. 19-29. 1883. 
Shell of medium size, obliquely sub-rhomboidal; length a little greater than 
the height; basal margin broadly curving. Posterior extremity sub-truncate, 
abruptly rounded below. Cardinal line short, straight. Anterior end short, 
sub-truncate. 
Yalves of moderate convexity below, somewhat gibbous in the umbonal 
region. 
Beaks sub-anterior, prominent, oblique, rising above the hinge-line and 
incurved. Umbonal slope prominent, obtusely sub-angular above, and merg¬ 
ing into the general convexity before reaching the post-inferior extremity. 
Surface marked by tine concentric striae, which are more or less fascicu¬ 
late, producing varices of growth. 
Four specimens measure respectively 19, 20, 27 and 30 mm. in length, and 
16, 19, 22 and 26 mm. in height. 
This shell is distinguished by its oblique form and sub-truncate extremities. 
In some of its phases it more nearly resembles E. Philipi than any other, but 
the beaks are more oblique and more anterior, and the form is not so regularly 
rounded. 
Formation and localities. In the Chemung group, at Bock creek, Hobbieville 
and Painted Post, N. Y.; and Mansfield, Pa. 
