238 SMITHSONIAN MISCELLANEOUS COLLECTIONS VOL. 127 
tion, Newfoundland, and the Quebec City formation in Quebec, Canada. The 
earliest species is from the Shumardia zone of Quebec. 
PATERULA AMII Schuchert 
Paterula sp. Hart and CLarkE, Pal. New York, vol. 8, p. 78, pl. 4, K, fig. 1, 1893. 
P. amti Scuucuenrt, U. S. Geol. Surv. Bull. 87, p. 301, 1897—REUDEMANN, New York State 
Mus. Bull. 42, p. 560, pl. 1, fig. 2, 190T. 
Horizon and locality—Quebec City formation: South of St. Johns Market, 
Quebec, Province of Quebec, Canada. Normanskill formation: Mount Merino, 
near Hudson, N. Y. Humber Arm series, Newfoundland. 
PATERULA PERFECTA Cooper, new species 
Plate 18, H, figures 54-56; plate 24, D, figures 12-23 
Shell small, inequivalved, subelliptical in outline. Anterior and posterior mar- 
gins slightly more narrowly rounded than the lateral margins. Surface of both 
valves ornamented by fine concentric undulations and very obscure and fine 
radial lines. 
Pedicle valve gently convex in profile with the greatest convexity at the pos- 
terior third; beak submarginal, smooth, pedicle notch small. 
Brachial valve strongly convex in profile with the greatest convexity a little 
posterior to the middle. Beak obscure, smooth, located a little less than one-fifth 
the length of the valve from the posterior margin. Posterior slope steep and 
gently concave ; anterior slope gentle and convex. Lateral slopes moderately steep 
but flat. 
Measurements in mm.— 
Length Width Thickness 
Paratype (pedicle valve 116799a)............. 3.1 3.0 0.5 
% f Tk, MODADE )), cals ia iatilGanstets 2.0 1.8 ? 
- (brachial valve 109409d) ........... 2.5 2.1 0.6 
Types.—Holotype: 109409k ; figured paratypes : 109404c-e,g, 109407, 109409¢, 
h,i,o-g, 116799a-c, 109408a; unfigured paratypes: 109404a,b,f, 109406a-e, 
109408b, 109409a,b,d-g,j-n. 
Horizon and locality —Pratt Ferry formation in Alabama: 0.2 mile southeast 
of Pratt Ferry, Blocton (15’) Quadrangle. 
Limestone in the base of the Whitesburg formation in Tennessee: 14 miles 
west of Bulls Gap, and 2 to 24 miles southeast of Whitesburg, Bulls Gap (T.V.A. 
171-SE) Quadrangle. Arline formation in Tennessee: 4 mile southeast of 
Friendsville, Concord (T.V.A. 138-SW) Quadrangle. 
Botetourt formation in Virginia: Porterfield Quarry, 5 miles east of Saltville, 
Maccrady (T.V.A. 218-NW) Quadrangle; 4 miles southwest of Bland, Bland 
County ; 14 miles southeast of Harrisonburg, Harrisonburg (15’) Quadrangle; 
1 mile northeast of Harrisonburg; 4 mile west of Strasburg, Strasburg (15’) 
Quadrangle. 
Botetourt formation (Cybeloides bed) in Virginia: Opposite the dam on the 
Shenandoah River, 1 mile north of Edinburg, Edinburg (15’) Quadrangle. 
