PART I CHAZYAN AND RELATED BRACHIOPODS—COOPER 1003 
Measurements in mm.— 
Brachial Hinge 
Length length Width width Thickness 
Hypotype (117319a)... 8.6 8.0 9.6 7.2 4.3 
$ (117315b)... 9.0 8.5 10.2 6.9 4.7 
ss (117317a)... 10.0 9.1 10.8 7.7 4.6 
‘is (107316D))-2.. 7B 10.7 12.7 9.5 4.8 
x (E7280) sO 12.9 15.4 9.3 6.2 
c CET7ZICL).c. O:4 9.1 10.9 8.2 4.5 
Types—Holotype: 108198e; paratypes; 108198a-d,f-r; figured hypotypes: 
117313a, 117314, 117315a,b, 117316a, 117317a,d, I117319a, 123233a, 123290a-C ; 
unfigured hypotype: 123233b ; measured hypotypes: 117318a,b,f. 
Horizon and locality.—Wardell formation and Wardell part of Dryden forma- 
tion in Tennessee: In the vicinity of Lone Mountain, near Tazewell, Tazewell 
(T.V.A. 154-NE) Quadrangle; just below and also 4o feet below the Hes- 
perorthis zone in the Evans Ferry section on U. S. Highway 25E, 4 mile north 
of Indian Creek, Howard Quarter (T.V.A. 162-NW) Quadrangle; at the bend 
of the railroad just west of Liberty Hill, Dutch Valley (T.V.A. 154-SE) Quad- 
rangle; on the west side of the sharp loop on the road down Flint Creek, in the 
NW4 of the center subquad., Powder Springs (T.V.A. 154-SW) Quadrangle; 
Nicely and Palmer’s store, $ mile east of Kate, Maynardville (30’) Quadrangle ; 
4 mile north of Emory road, 2 miles northeast of Hall Crossroad, Fountain City 
(T.V.A. 146-SW) Quadrangle. 
Lower Ridley formation in Tennessee: 1 mile west of the courthouse in Mur- 
freesboro, Murfreesboro (15’) Quadrangle. 
Ooltewah formation in Georgia: On Georgia Highway 2, 14 miles northeast 
of Naomi, Walker County. 
Ooltewah formation in Tennessee: On the west side of Missionary Ridge, 
Chattanooga (30’) Quadrangle; 2 miles southeast of Snow Hill Post Office, 
Snow Hill (T.V.A. 112-NE) Quadrangle. 
Wardell formation and Wardell part of Dryden formation in Virginia: Hes- 
perorthis bed at Lloyd Carter’s barn 3 mile northeast of the school at Rye Cove, 
Clinchport Quadrangle ; elsewhere near Rye Cove, Clinchport (T.V.A. 188-NW) 
Quadrangle. 
Discussion.—This species may be recognized by the strong carination of the 
umbo of the pedicle valve, by the thin lateral profile, and the moderately strong 
costellae. It differs from F. stonensis in the lesser depth and convexity of both 
valves, the lesser strength of the costellae, and more strongly carinate pedicle 
umbo. 
FASCIFERA SULCATA Cooper, new species 
Plate 153, B, figures 7-9 
Shell of about medium size, slightly wider than long but subcircular in outline ; 
anterior commissure deeply sulcate ; fascicostellate with about 2 or 3 costellae to 
the millimeter at the front margin. 
Pedicle valve with gently convex lateral profile; umbo strongly carinate, the 
