﻿PART II CHAZYAN AND RELATED BRACHIOPODS — COOPER Il8o, 



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 (37) another impression of the pedicle interior, X 2, counterpart to pedicle exte- 

 rior, fig. 33, holotype; (38) plasticine replica of the brachial interior, X 2, pre- 

 pared from mold, paratype, 117446b; (39) another plasticine replica of the 

 brachial interior, X 2, showing septum and cardinalia, prepared from mold, 

 paratype, 117446c. 



Athens formation (base), just east of the road junction, z\ miles south-south- 

 east of Riceville, Calhoun (T.V.A. 125-SW) Quadrangle, Tenn. 



Plate 191 

 Leptellina 



A. Leptellina transversa Cooper, new species 75° 



(1, 2) Pedicle and brachial views, X I, outline partially restored, of the holotype, 

 117457a; (3-7) respectively posterior, anterior, side, pedicle, and brachial views, 

 X2, of the holotype; (8) brachial interior seen from the pedicle side, X 2, 

 paratype, 117457c. 



Arline formation, Porterfield Quarry, 5 miles east of Saltville, Maccrady 

 (T.V.A. 218-NW) Quadrangle, Va. 



B. Leptellina incompta Cooper, new species 75° 



(9) Brachial view of a complete specimen, X 1, paratype, 117438b; (10-13) re- 

 spectively brachial, posterior, side, and pedicle views, X 2, of the preceding 

 paratype; (14-17) respectively pedicle, brachial, posterior, and anterior views, 

 X2, showing exterior lamellae, of the holotype, 117438c; (18) pedicle view, 

 X 1, of the holotype; (19, 20) brachial and pedicle views, X 2, of another 

 paratype, 117438a; (21) pedicle interior, X 3, the view being a reconstruction 

 of a valve preserving one-half of the specimen, paratype, H7438d; (22) ante- 

 rior part of an imperfect brachial valve preserving part of the disk, X 2, 

 paratype, 11 7438c 



Dark shale below Eureka quartzite, in north-facing nose of hill 8167, Martins 

 Ridge, Monitor Range, Roberts Mountains (i°) Quadrangle, Nev. 



C. Leptellina abbreviata Cooper, new species 747 



(23-25) Side, pedicle, and brachial views, X I, showing patches of lamellae re- 

 maining on the shell, holotype, 117433a; (26-30) respectively side, anterior, 

 posterior, pedicle, and brachial views, X 2, of the holotype; (31) impression of 

 the pedicle interior showing the form of the muscle scars, X 2, paratype, 11 7433b. 

 Oranda formation, in the railroad cut, \ mile west of Strasburg, Strasburg 

 (15') Quadrangle, Va. 



D. Leptellina delicatula (Butts) 749 



(32, 33) Brachial and pedicle views of a young specimen, X 1, hypotype, 117436a; 

 (34) brachial view of an adult specimen, X I, hypotype, H7436d; (35-39) re- 

 spectively anterior, side, posterior, pedicle, and brachial views, X 2, of the 

 preceding specimen. 



Little Oak formation, junction Bailey Gap and main roads, Cahaba Valley, 

 SWiSWi sec. 13, T. 19 S., R. 2 W., if miles northeast of Newhope Church, 

 Vandiver (15') Quadrangle, Ala. 



Plate 192 

 Bilobia, Eoplectodonta 



A. Bilobia virginiensis Cooper, new species 7^2 



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

 plete specimen, X 3, paratype, 117467c. 



