PART I CHAZYAN AND RELATED BRACHIOPODS—-COOPER 253 
the Alabama shell, and the pedicle valve is less curved. The pseudointerarea 
of the Tennessee species is much narrower than that of C. gigantea. The Ala- 
bama species has the appearance of being a lower and wider cone than the Ten- 
nessee shell. 
CONOTRETA MULTISINUATA Cooper, new species 
Plate 16, G, figures 28-40 
Shell small, pedicle valve forming a low cone; brachial valve subcircular and 
gently convex. Apical angle 70°; lateral angle 55°. Surface of both valves 
marked by very fine concentric lines of growth. Pseudointerarea triangular, 
equal in width to a little less than half the width of the valve. Lateral slopes from 
the pseudointerarea narrowly rounded. Anterior slope convex. Beak bent slightly 
posteriorly. 
Brachial valve gently but unevenly convex in lateral profile and with the great- 
est convexity in the umbonal region. Lateral slopes flat and gentle ; median sulcus 
deep, narrow, and extending from the umbo nearly to the front margin. 
Interior of pedicle valve marked by as many as 14 pallial sinuses that are 
formed by the repeated branching of a main trunk situated on each side of the 
pedicle tube. Median septum long, extending nearly to the front margin, high 
and with its most elevated point at about the middle of the valve. 
Measurements in mm.—Pedicle valve (109742g), length 2.3, width 2.8, pos- 
terior slope 1.6, anterior slope 2.8, width of pseudointerarea 1.2. Pedicle valve 
(109742f), length 2.7, width 3.2, posterior slope 2.4, anterior slope 3.1, width of 
pseudointerarea 1.3. Brachial valve (109742c), length 1.8, width 2.0. (109742a), 
length 2.2, width 2.0. 
Types.—Holotype: 109746a; figured paratypes: 109739a, 109742f,h,p,r, 
109746b-d; unfigured paratypes: 109736a-h, 109737a-c, 109738a,b, 109739b, 
109740a-c, 109741a-k, 109742a-e,g,1-p,q,S-v. 
Horizon and locality—Botetourt formation in Virginia: 14 miles southeast of 
Harrisonburg, Harrisonburg (15’) Quadrangle. 
Chatham Hill formation in Virginia: Bland County, Grayson Farm, 4 miles 
southwest of Bland; 1 mile northwest of Lexington, Lexington (15’) Quad- 
rangle. 
Whitesburg formation in Tennessee: 2 miles south of Albany and 8 miles 
northwest of Greenville, Mosheim (T.V.A. 181-NW) Quadrangle; 14 miles 
west of Bulls Gap, Bulls Gap (T.V.A. 171-SE) Quadrangle. 
Pratt Ferry formation in Alabama: 0.2 mile southeast of Pratt Ferry, Blocton 
(15’) Quadrangle. 
Edinburg formation (Liberty Hall facies) in Virginia: In a field northwest 
of U. S. Highway 11, 3 mile southwest of Lacey Springs, Broadway (15’) Quad- 
rangle; southeast side of knob 1,000 feet east of Endless Caverns Entrance, 
Mount Jackson (15’) Quadrangle. 
Discussion—This species is suggestive of Spondylotreta? declivis and C. cus- 
pidata. It differs from the former in its ornamentation because it does not have 
the regular and fairly strong concentric lines characteristic of Spondylotreta? 
