514 SMITHSONIAN MISCELLANEOUS COLLECTIONS VOL. 127 
EREMOTOECHIA ALABAMENSIS Cooper, new species 
Plate 78, A, figures 1-9 
Shell of about medium size for the genus, transversely and broadly elliptical 
in outline. Hinge narrower than the midwidth; cardinal extremities obtusely 
angular, valves subequal in depth; sides rounded, maximum width at the middle. 
Anterior margin broadly rounded, anterior commissure broadly uniplicate. Sur- 
face multicostellate, costellae unequal in size, crowded, with striae narrower than 
the width of the costellae ; about 12 costellae in 5 mm. at the anterior margin. 
Pedicle valve gently convex in lateral profile and with the maximum con- 
vexity at about the middle; anterior commissure broadly and gently convex, the 
median region gently humped and with long, gentle lateral slopes. Umbo nar- 
rowly convex, the convexity continued anteriorly for about two-thirds the length 
but then merging with the flattened sulcate area. Median region somewhat swol- 
len. Sulcus poorly defined, forming a broad, flattened or depressed area on the 
median part of the anterior third. Lateral areas somewhat flattened and form- 
ing long, gentle slopes to the cardinal extremities. Interarea long, flat, strongly 
apsacline. Pseudodeltidium narrow ; foramen small. 
Brachial valve fairly evenly but only moderately convex in lateral profile ; an- 
terior profile broadly and fairly strongly convex. Umbonal region swollen; 
median region from umbo to anterior margin swollen; sulcus shallow and nar- 
row, originating at the beak and extending to the middle where it disappears in 
the swelling anterior half which forms an ill-defined fold. Flanks full and with 
short, steep slopes to the margins and cardinal extremities. Chilidial plates 
prominent. Interior not known. 
Measurements in mm.—Paratype (117060a), length 14.0, brachial length 13.7, 
width 18.6, hinge width 12.1, thickness 8.7. 
Types.—Holotype: 117060b ; figured paratype: 117060a; unfigured paratypes: 
117060c-f. 
Horizon and locality —Little Oak formation in Alabama: From a road cut on 
U. S. Highway 31, 4 mile north of Pelham, Bessemer Iron District (15’) 
Quadrangle. 
Discussion.—This species is a fairly large one. Fragments in the collection 
suggest a species comparable in size to E. cloudi. It is characterized by a short 
but fairly strong brachial sulcus and a corresponding short, low, and narrow 
fold on the opposite valve. In these respects it differs from E. cloudi and 
E. silicica. The little known about the latter species indicates a shell somewhat 
smaller than E. alabamensis. 
EREMOTOECHIA CLOUDI Cooper, new species 
Plate 77, B,C, figures 10-27 
Shell moderately large, wider than long with the hinge equal to about three- 
fifths the greatest width which is at the middle. Cardinal extremities obtusely 
rounded. Lateral and anterior margins broadly rounded. Anterior commissure 
