﻿PART II CHAZYAN AND RELATED BRACHIOPODS — COOPER I065 



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 (34, 35) respectively X 1 and X 2 views of a brachial valve, paratype, 110052b; 

 (36) pedicle interior, X 2, paratype, 110059b. 



Bromide formation (Pooleville member — Oxoplecia gouldi zone), branch of 

 Hickory Creek, NW^ sec. 26, T. 5 S., R. 1 E., Criner Hills, Carter County, 

 Okla. 

 (27-30) Respectively pedicle, side, posterior, and brachial views of a well- 

 preserved specimen of medium size, X 1, paratype, 110040a; (31) brachial view, 

 X 2; of same; (37) enlargement, X 4, of the brachial surface showing lamellae, 

 paratype, 110040b. 



Bromide formation (Pooleville member — Oxoplecia gouldi zone), Rock Cross- 

 ing of Hickory Creek, about center sec. 35, T. 5 S., R. I E., Criner Hills, Carter 

 County, Okla. 



Plate 45 

 Glyptorthis 



A. Glyptorthis irregularis Cooper, new species 370 



(1, 3) Exterior of a pedicle valve, X2 and X 1, holotype, 116936a; (2) pedicle 

 interior, X 2, of holotype; (4, 5) respectively X 1 and X 2 enlargements of the 

 brachial exterior, paratype, 116936c; (6) brachial interior, X 2, paratype, 

 n6936d. 



Wardell formation, in Raccoon Valley, £ mile northeast of Fleanor Mill, 

 Powell Station (T.V.A. 137-SE) Quadrangle, Tenn. 



B. Glyptorthis senecta Cooper, new species 373 



(7) Pedicle interior showing muscle scars, X 2, holotype, 1100/oh; (8) pedicle 

 exterior, X 2, paratype, noo7oi; (9) same as preceding, X T ; (10, 11) respec- 

 tively X 1 and X2 enlargements of the brachial exterior, paratype, H0070g; 

 (12) brachial exterior, X 3, paratype, uoo7od; (13) interior of a young bra- 

 chial valve, X 2, paratype, noo7of ; (14) interior of a large brachial valve, X 2, 

 paratype, 110070c. 



Poteet formation (Yellow Branch member = 9-foot marble), on the road 

 beside Yellow Branch, 5 miles southeast of Rose Hill, Rose Hill (T.V.A. 

 161-NE) Quadrangle, Va. 



C. Glyptorthis assimilis Cooper, new species 361 



(iS-JQ) Anterior, posterior, side, pedicle, and brachial views of a young, complete 

 specimen, X 2, paratype, n6928g; (20) brachial view of another specimen, 

 younger than the preceding, X 2, paratype, 116928!; (21) pedicle view of a very 

 young individual, X 2, paratype, 11692811; (22) pedicle exterior, X I, paratype, 

 110013b; (23, 24) respectively X2 and X 1 enlargements of the brachial exte- 

 rior, paratype, 110013d; (25) pedicle exterior, X Ij paratype, nooi3g; (26, 27) 

 pedicle exterior and interior, X 2, paratype, 110013c; (28) posterior portion of 

 pedicle interior showing interarea and pedicle plate, X 2, paratype, n6928f; 

 (32) pedicle interior, X 1, paratype, 116928c; (33) same, X 2, showing fos- 

 settes and apical plate ; (34) delthyrial cavity of preceding enlarged X 4 to show 

 apical plate; (35) brachial interior, X 2, showing cardinalia, paratype, nooi3f. 



Ridley formation (lower third), east side Marshall Knobs, 5 miles south of 

 Murfreesboro, Murfreesboro (15') Quadrangle, Tenn. 



(29) Pedicle exterior, X 2, of a large specimen, paratype, 110012c; (30, 31) 

 respectively X 1 and X 2 enlargements of the interior of the preceding. 

 Ridley formation, Murfreesboro, Tenn. 



