PART I CHAZYAN AND RELATED BRACHIOPODS—COOPER 689 
Figured specimen.—111392a. 
Horizon and locality—Meadow marble in Tennessee: 2 miles southeast of 
Kiser, Meadow (T.V.A. 139-NW) Quadrangle. 
Genus HALLINA Winchell and Schuchert, 1892 
Hallina WINCHELL and SCHUCHERT, Amer. Geol., vol. 9, p. 291, 18902. 
HALLINA GLOBULARIS Cooper, new species 
Plate 143, K, figures 48-52 
Shell large for the genus, subcircular in outline; valves subequal in depth; 
sides gently rounded; anterior margin broadly rounded; anterior commissure 
faintly sulcate. Surface paucicostellate ; costae confined to the anterior half and 
numbering about 20. 
Pedicle valve strongly convex in lateral profile and with the maximum con- 
vexity just posterior to the middle; anterior profile strongly convex, somewhat 
narrowed medially and with long, steep, flat, lateral slopes. Umbonal region nar- 
rowly swollen; median region strongly swollen; anteromedian third or half flat- 
tened where a broad fold is very indistinctly visible; flanks steep. Beak strongly 
incurved. Beak ridge short and sharp. 
Brachial valve strongly convex in lateral profile and with maximum depth at 
about the middle; anterior profile not so strongly arched as that of the pedicle 
valve but strongly convex nevertheless; median and umbonal regions inflated. 
Anterior third at the middle slightly flattened and forming a barely perceptible 
sulcus. Flanks swollen, steep sided. 
Measurements in mm.— 
Length Width Thickness 
Lig TEEN gt “tahoe eae Si ra le I rag oh 4.3 4.0 2.8 
Paraty piel BR eee cate ees eae cee aes tooth 4.1 3.9 3.0 
Types.—Holotype: 117257a; unfigured paratype: 117257b. 
Horizon and locality—Auburn chert in Missouri: 4 mile east of Auburn, Els- 
berry (15’) Quadrangle. 
Discussion—This species is the largest member of the genus known and is 
characterized by its globular form, rounded outline, and strongly swollen valves. 
HALLINA LIRATA Cooper, new species 
Plate 143, C, figure 12 
Shell small, elongate oval in outline; valves subequally convex; sides and an- 
terior margins rounded; anterior commissure rectimarginate. Surface marked 
by about 26 direct, rounded costellae. 
Pedicle valve moderately convex in lateral profile and with the maximum con- 
vexity at the middle; anterior somewhat flattened; anterior profile broadly and 
moderately convex with long, moderately steep slopes. Umbonal region moder- 
ately inflated ; median region strongly swollen, the swelling extending nearly to 
the margins ; lateral slopes moderately steep. Interior with short dental plates. 
