200 SMITHSONIAN MISCELLANEOUS COLLECTIONS VOL. 127 
LINGULELLA GALBA Cooper, new species 
Plate 7, B, figures 13-16 
Color orange-yellow ; valves oval in outline with the greatest width slightly 
anterior to the middle. Lateral margins gently rounded. Anterolateral and an- 
terior margins forming a semicircle. Beak of pedicle valve acute, apical angle, 
about 70°. Surface of both valves marked by concentric undulations crowded at 
the margins but more spread-out in the median region. 
Pedicle valve: Lateral profile gently convex ; anterior profile moderately con- 
vex. Umbonal region narrowly rounded and with steep slopes to the margins. 
Brachial valve: Both profiles gently convex and having greater convexity than 
the pedicle ones. Midregion moderately swollen; anterior slope gentle; slopes 
to lateral margins moderate. 
Measurements in mm.— 
Length Width Thickness 
Halotype’ (gediclé "valvey "occ es'ceae sce hs ce os 12.0 8.5 Pe 
Paratype (brachial valve 109282a) .......... 10.4 8.2 1.8 
Types.—Holotype: 109282b; figured paratype: 109282a ; unfigured paratypes: 
109282c-g. 
Horizon and locality—Bromide formation (Mountain Lake member), in 
Oklahoma: Middle of east line sec. 33, T. 2 S., R. 2 E., 2 miles east of Springer, 
Carter County. 
Discussion—This species suggests the exfoliated Spinilingula intralamellata 
Cooper, new species, but that is a much smaller species with stronger and more 
distant concentric lamellae, and external spines. 
LINGULELLA ? GLYPTA Cooper, new species 
Plate 1, G, figures 21-25 
Represented by two specimens of longitudinally elliptical outline; brachial 
valve slightly deeper than the pedicle valve. Color light grayish brown. Sides 
subparallel, gently curved. Anterior margin narrowly rounded. Median and lat- 
eral areas differently sculptured, the former by irregular concentric undulations 
which disappear on the flanks. Sides marked by striae closely crowded on the 
lateral slopes near the margins but extending obliquely over the concentric undu- 
lations on the lateral slopes near the junction with the median region. 
Pedicle beak broken ; lateral profile gently convex with the most elevated part 
at about the middle; anterior profile more strongly convex and with moderately 
steep lateral slopes. Brachial valve with moderately convex lateral profile, with 
the greatest convexity slightly posterior to the middle; posterior slope short and 
moderately steep; anterior slope long and gentle. Anterior profile moderately 
convex and with moderately steep lateral slopes. Incomplete dimensions in 
mm. of holotype: length 11, width 6.5, thickness 2.9. 
Types.—Holotype: 116760a; figured paratype: 11676ob. 
Horizon and locality—Bromide formation (Pooleville member-zone 3) in 
