190 SMITHSONIAN MISCELLANEOUS COLLECTIONS VOL. 127 
OBOLUS ? CYANE (Billings) 
Lingula cyane Brtu1ncs, Geol. Surv. Canada, Paleozoic fossils, vol. 1, p. 216, fig. 200, 1865.— 
Basser, U. S. Nat. Mus. Bull. 92, p. 862, 1915. 
Horizon and locality—Table Head series (Logan’s Division P): 4 miles 
northeast of Portland Creek, Newfoundland. 
OBOLUS ? GRANDIS Cooper, new species 
Plate 1, H, figures 26-28 
Shell large and thick, suboval in outline and narrowly lenticular in profile. 
Lateral margins moderately curved, anterior margin subsemicircular. Valves 
subequally convex with the pedicle valve slightly deeper than the brachial one. 
Greatest convexity of both valves at about the posterior third. Surface marked 
by subequal concentric undulations which are a little more distinct and crowded 
in the posterior half than at the front. 
Pedicle valve with beak missing; umbonal and midregions swollen; lateral 
slopes nearly flat in profile, sloping moderately to the margins. Slope from a 
point one-third the length from beak faintly convex. 
Brachial valve with beak having an apical angle of about 120° and protruding 
posterior to the margin of valve junction. Midregion swollen for about two- 
thirds the length from the beak. Anterior slope moderately steep, flat in profile. 
Slopes to the lateral margins flat in profile, moderately steep. 
Measurements in mm.—Holotype, length 42.7+, width 31.8, thickness 12.9. 
Type.—Holotype: 71823. 
Horizon and locality—Red Knobs formation, Tennessee: In a marble quarry 
near Knoxville. 
Discussion—This species may be distinguished by its large size and oval form. 
Next to Ectenoglossa nymphoidea it is the largest of the linguloids known from 
these rocks. It differs from all other species of Obolus in its great size. 
OBOLUS ? NITENS Cooper, new species 
Plate 7, C, figures 17-19 
Shell small, broadly oval in outline. Brachial valve nearly circular. Sides and 
anterior margin strongly rounded; posterolateral margins straight, forming a 
beak angle of 100°. Surface marked by strong, even, elevated, fairly closely 
crowded concentric lines. 
Pedicle valve gently but unevenly convex in lateral profile. Strongest con- 
vexity in the umbonal region from which a long, gentle slope extends to the 
anterior margin. Anterior profile with low convexity but stronger than in the 
other view. Pedicle valve somewhat humped-up in the middle with long, mod- 
erately steep lateral slopes. Umbonal region and median two-thirds slightly 
swollen, most so posteriorly. Beak small and not protruding posterior to the 
posterior margin. 
Brachial valve in lateral profile with its maximum convexity in the posterior 
