LAMELLIBRANCHIA TA. 
389 
Edmondia subovata, n. sp. 
PLATE LXIV, FIGS. IS, 19, 20, 26, 27, 28 (10, 21?) ; AND PLATE XCV, FIGS, 9-12. 
In part Edmondia Pkilipi, Hall. Prelim. Notice Lamellibranchiata, 2, p. 90. 1870. 
“ “ “ “ Pal. N. Y., vol. v, pt. 1. Plates and Explanations: PI. 64, figs. 9-18. 
1883. 
“ “ Burlingtonensis (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 from medium to large size, broadly elliptical; length about one-third 
greater than the height; basal margin gently curving in the middle, more 
abruptly curving toward either extremity. Posterior margin regularly 
rounded. Cardinal line nearly straight. Anterior end large, regularly 
rounded. 
Valves regularly convex, somewhat gibbous in the umbonal region. 
Beaks at about the anterior third, prominent and incurved over the hinge. 
Umbonal slope gibbous above, not defined nor affecting the post-inferior 
margin. 
Surface marked by fine, lamellose, concentric striae, which are unequally 
fasciculate, sometimes making conspicuous varices of growth. 
Three specimens measure respectively 33, 35 and 46.5 mm. in length, and 
22, 25 and 31 mm. in height. 
This species differs from E. Philipi in its broadly elliptical form and more 
anterior position of the beaks, characters by which it may be readily distin¬ 
guished. 
Formation and localities. In the Chemung group, at Philipsburgh and Hobbie- 
ville, N. Y.; and Mansfield, Tioga county, Pa. 
Edmondia transversa, n. sp. 
PLATE LXIV, FIG. 24. 
In part Edmondia Burlingtonensis (White and Whitfield), Hall. Pal. N. Y., vol. v, pt. 1. Plates and 
Explanations: PI. 64, figs. 19-29. 1883. 
Shell of medium size, rhomboid-elliptical; length one-third greater than the 
height; basal margin straight in the middle, curving gently toward either 
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