﻿PART II CHAZYAN AND RELATED BRACHIOPODS — COOPER IO79 



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 the holotype, 110403c; (11) brachial view, X 2, of the holotype; (12) brachial 

 interior preserving traces of the pallial marks, X 2, paratype, 110403b; (13) 

 another brachial interior showing the cardinalia exceptionally well, X 2, para- 

 type, 110403d; (14) pedicle interior showing pallial trunks, X 2, paratype, 

 110403c. 



Horizon and locality same as preceding. 



C. Midticostella gerontica Cooper, new species 419 



(15, 17) Respectively exterior and interior of the brachial valve, X I, paratype, 

 110392c; (19) same, X 2, showing details of cardinalia and pallial trunks; (16) 

 exterior of the pedicle valve, X 1, holotype, H0392f ; (18) pedicle interior of an 

 old specimen showing extravagant development of pallial marks, X I, paratype, 

 110392a; (20) pedicle interior, X 2, of another specimen showing pallial trunks, 

 paratype, ii0392g. 



Lincolnshire formation, Marble Bluff, 8 miles west-northwest of Loudon, 

 Loudon (30') Quadrangle, Tenn. 



Plate 63 

 Chaulistomella, Multicostella 



A. Chaulistomella sp. 1 445 



(1-5) Respectively brachial, pedicle, side, anterior, and posterior views of a com- 

 plete specimen, X I, figured specimen, 117990a; (6, 7) respectively X 1 and X 2 

 enlargements of the brachial interior, figured specimen, 117990b. 



Carters formation (Oxoplccia bed), quarry 0.3 mile north of Gate City, 

 Leeds (15') Quadrangle, Ala. 



B. Multicostella robusta Cooper, new species 426 



(8-11) Respectively pedicle, anterior, brachial, and side views of a complete speci- 

 men, X 1, holotype, 116992a; (12) enlargement, X 3, of surface of same. 



Sevier formation, \ mile north of Gooseneck, southwest corner of Louisville 

 (T.V.A. 138-SE) Quadrangle, Tenn. 



C. Midticostella quadrata Cooper, new species 424 



(13, 14) Respectively brachial and pedicle views of a small individual, X I, para- 

 type, 98189a; (20) pedicle interior showing large muscle area, X I, paratype, 

 98189c; (21) brachial interior, X 2, paratype, 98i89g. 



Whistle Creek formation, on Whistle Creek, 2 miles northwest of Lexington, 

 Lexington (15') Quadrangle, Va. 

 (15-19) Respectively pedicle, brachial, side, posterior, and anterior views, X I, 

 of the holotype, 116989a. 



Whistle Creek formation, on U. S. Highway 60, 100 yards southeast of 

 Whistle Creek, 2 miles northwest of Lexington, Lexington (15') Quadrangle, 

 Va. 



D. Multicostella plicata Cooper, new species 423 



(22, 23) Respectively brachial and pedicle views of a large specimen, X i> para- 

 type, 110425c; (24-26) respectively pedicle, brachial, and side views of a young 

 specimen, X I, paratype, 110425b; (27) brachial interior, X I, holotype, 110414b; 



(28) pedicle interior belonging to preceding valve, X 1, holotype, 110414c; 



(29) pedicle interior, X 2, showing details of muscle area, paratype, 110414a. 

 Lincolnshire formation, i mile north of Eidson on old lane, Kyles Ford 



(T.V.A. 170-SE) Quadrangle, Tenn. 



