﻿PART II CHAZYAN AND RELATED BRACHIOPODS — COOPER IO69 



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 (38) Interior of the pedicle valve showing large muscle scars and teeth, X I, 

 paratype, 116940b; (39, 40) respectively X2 and Xi views of the brachial 

 interior showing cardinalia, paratype, 116940a. 



Decorah formation (Ion member), cut on county road 1.1 miles east of U. S. 

 Highway 52, on south edge of Cannon Falls, Minn. 



H. Ptychoplenrella imiplicata Cooper, new species 391 



(41, 42) Respectively exterior and interior of the brachial valve showing the car- 

 dinalia, X 3, paratype, nonob; (43, 44) exterior and interior of the pedicle 

 valve, X 3, holotype, 110110a. 



Benbolt formation, \\ miles west of Rye Cove, Clinch port (T.V.A. 188-NW) 

 Quadrangle, Va. 



I. Glyptorthis uniformis Cooper, new species 3/8 



(45-49) Respectively pedicle, posterior, side, anterior, and brachial views, X h of 

 the holotype, 116945a; (51) pedicle view, X 2, of the holotype, to show the orna- 

 mentation; (50) interior of the brachial valve, X 2, paratype, 116945b. 



Benbolt formation, on the north side of U. S. Highway 19, i| miles southeast 

 of Hansonville Post Office, Brumley (T.V.A. 205-SE) Quadrangle, Va. 



Plate 50 



Atelelasma, Cyrtonotella, Desmorthis, Eremotoechia, Glyptorthis, 

 Hesperorthis, Ptychopleurella 



A. Cyrtonotella magna Cooper, new species 322 



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

 complete specimen, X I, holotype, 116897b; (6) brachial interior, X 2, paratype, 

 1 1 6898. 



Sevier shale, east side of the road 0.2 mile north-northwest of Gooseneck, 

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



B. Eremotoechia silicica Cooper, new species 515 



(7) Brachial view of a complete specimen, X I, paratype, 117063. 



Arline formation, 100 yards southwest of the Negro Cemetery, \ mile north- 

 east of Friendsville, Concord (T.V.A. 138-S W) Quadrangle, Tenn. 



C. Hesperorthis sp. 2 360 



(8-12) Respectively side, anterior, posterior, pedicle, and brachial views of a com- 

 plete specimen, X 2, figured specimen, 116926; (13) brachial view, X I, of same. 

 Edinburg formation (about the middle of the Nidulites zone), beside the road 

 at the lower end of Tumbling Run, 1^ miles southwest of Strasburg, Strasburg 

 (15') Quadrangle, Va. 



D. Glyptorthis sp. 3 382 



(14-18) Respectively brachial, posterior, anterior, pedicle, and side views of a com- 

 plete specimen, X 2, figured specimen, 11 6950. 



Little Oak formation, junction of Bailey Road and main road, SWiSWi 

 sec. 13, T. 19 S., R. 2 W., i% miles northeast of Newhope Church, Vandiver 

 (IS') Quadrangle, Ala. 



E. Glyptorthis uncinata Cooper, new species 377 



(19-23) Respectively pedicle, posterior, side, anterior, and brachial views of a com- 

 plete specimen, X 2, paratype, 1 16942. 



Bromide formation (Mountain Lake member), Nebo, Murray County, Okla. 



F. Glyptorthis transversa Cooper, new species 376 



(24-28) Respectively pedicle, anterior, side, posterior, and brachial views of a com- 

 plete specimen, X 2, holotype, 1 16939. 



