﻿PART II CHAZYAN AND RELATED BRACHIOPODS — COOPER I III 



Plate 103 



oxoplecia 



Page 



A. Oxoplecia filosa Cooper, new species 542 



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

 complete specimen, X I, paratype, 117099b; (12) enlargement, X 3, of the exte- 

 rior surface of the anterior part of the pedicle valve of the preceding including 

 most of the sulcus; (6-10) respectively posterior, brachial, anterior, pedicle, and 

 side views of a large individual, X 1, holotype, 117099a; (11) posterior of the 

 holotype, X 2, showing the interarea and the narrow elevated ridge on the 

 pseudospondylium. 



Bromide formation (Mountain Lake member), road cut on Oklahoma High- 

 way 18, center NWi sec. 11, T. 1 S., R. 3 E., 1.8 miles south of Sulphur, 

 Murray County, Okla. 



B. Oxoplecia marmorata Cooper, new species 547 



(13) Brachial exterior, X 2, paratype, 117110c; (14) pedicle exterior, X 2, holo- 

 type, 117110a; (15) another pedicle exterior, X 2, paratype, 117110b; (16) im- 

 perfect pedicle valve, X 2, paratype, n7noe. 



Red Knobs formation, 1 mile south of Louisville, Louisville (T.V.A. 138-SE) 

 Quadrangle, Tenn. 



C. Oxoplecia gouldi Ulrich and Cooper 545 



(17-19) Respectively pedicle, posterior, and brachial views of a complete specimen, 

 X if hypotype, 118010; (20-24) respectively anterior, posterior, brachial, pedicle, 

 and side views of a well-preserved individual, X 1, hypotype, 110876; (25) pedi- 

 cle exterior of same, X 2, showing fila crossing the costellae; (27) posterior 

 view of the preceding, X 2, showing small apical foramen; (26) medial portion 

 of a pedicle valve showing filose ornamentation superimposed on the costellae, 

 X 4, paratype, 91898a; (28) the cardinal process seen from the anterior side, 

 X 2, paratype, 91898b. 



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

 ing of Hickory Creek, approximately center sec. 35, T. 5 S., R. 1 E., Criner 

 Hills, Carter County, Okla. 



(29) Apical view of an imperfect pedicle valve showing the foramen, the pseudo- 

 deltidium, and the narrow, elevated ridge, X 4, paratype, 91899. 



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

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

 Okla. 



Plate 104 

 Oxoplecia 



A. Oxoplecia recta Cooper, new species 556 



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

 what weathered specimen, X I, holotype, 110849a. 



Lincolnshire formation (Hogskin member), Sally Cleveland Farm, £ mile 

 southwest of Washburn, Dutch Valley (T.V.A. 154-SE) Quadrangle, Tenn. 

 (6) Posterior, showing ridge on pseudodeltidium, X 2, of a paratype, 117124. 



Lincolnshire formation (Hogskin member), 0.4 mile northeast of Red Hill, 

 Avondale (T.V.A. 162-SW) Quadrangle, Tenn. 



B. Oxoplecia eidsoncnsis Cooper, new species 541 



(7-1 1 ) Respectively posterior, brachial, anterior, pedicle, and side views, X 1, 

 of the paratype, 110847a. 



Lincolnshire formation, shaly beds, along old pasture road, £ mile north of 

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



