552 SMITHSONIAN MISCELLANEOUS COLLECTIONS VOL. 127 
(Ireland).” The horizon of these specimens was referred to the Black River by 
Ulrich in his report on fossils collected for the Birmingham folio. It is probable 
that this last locality, too, is an error. 
The type specimens of O. occidentalis are indentical with ones from Oklahoma. 
Not only are the specimens identical with the Oklahoma forms, but the matrix 
is like that of parts of the Bromide limestone. The resemblance is so strong that 
it led Ulrich to pencil a note on the type label, as follows: “Probably Black 
River age and not Ridley. See small Hallina-like brachiopod. This and the Clif- 
tonia probably same as the Oklahoma Criner species.” Oklahoma specimens, 
therefore, evidently were inadvertently labeled from Gate City, Ala. 
The specimens herein illustrated were taken 149 feet below the top of the 
Bromide formation (Pooleville member?) in Oklahoma: In the section 4 mile 
west of U. S. Highway 77, 34 miles north of Springer, Carter County; another 
lot of the same type of material was collected by C. A. Reeds in the section along 
Spring Creek, SW4 sec. 6, T. 2 S., R. 1 W., east of Pooleville, Murray County, 
and was taken from the heavy ledge in the creek above the 5th sandstone. 
Discussion.—The species under discussion is represented by poorly preserved 
specimens which were broken from matrix and are therefore so exfoliated that 
details of the ornamentation are obscure. All the specimens despite this are well 
rounded in outline. In this respect they are very different from O. gouldi. They 
are more rounded than the young of O. gouldi and have more convex valves than 
specimens of O. gouldi of comparable size. No other species is quite like this one. 
OXOPLECIA PARVA Cooper, new species 
Plate 102, B, figures 18-24; plate 106, C, figures 12-16 
Shell small for the genus, roundly elliptical in outline with the lateral margins 
broadly rounded and the anterior margin nearly straight; costellate, costellae 
variable, strong to subdued, often absent on parts of the shell; 8 on the flanks at 
the front margin. Fold with 4 or 5, and the sulcus usually with the same 
variation. 
Pedicle valve unevenly convex, with the maximum convexity just anterior to 
the umbo; anterior profile broadly but faintly convex ; sulcus originating on the 
anterior side of the umbo about 4 mm. anterior to the beak; sulcus deepening 
rapidly anteriorly to occupy slightly more than half the shell width at the front 
margin; flanks bounding the sulcus nearly flat; slopes gentle. Hinge narrow, 
interarea short. 
Brachial valve strongly convex in lateral profile and with the most convexity 
in the umbonal region; anterior profile strongly arched and with long, steep 
lateral slopes. Umbo smooth and swollen; fold originating slightly posterior to 
the middle, fairly strongly elevated anteriorly. Flanks swollen and convex. 
Measurements in mm.—Holotype, length 11.0, brachial length 10.3, width 12.3, 
hinge width 7.3?, thickness 7.6. 
Types.—Holotype: 117118; figured paratypes: 117117a,b; unfigured para- 
type; I17117¢. 
