﻿PART II CHAZYAN AND RELATED BRACHIOPODS — COOPER 1 233 



Page 



pedicle valve, X 1, holotype, 117824a; (3) interior of the pedicle valve, X 1, 



paratype, 117824c; (4) exterior of the brachial valve, X X, paratype, 117824b. 



Pierce formation, Pierce Mill, on Tennessee Highway 10, just south of 



Walterhill, 7$ miles north-northeast of Murfreesboro, Rutherford County, Tenn. 



B. Rafinesquina cf. R. trentonensis (Conrad) 888 



(5, 6) Exterior of two pedicle valves, X 1, figured specimens, 97578a, 97578b. 

 Collierstown formation, f mile northeast of Collierstown, Rockbridge County, 

 Va. 



C. Opikina glabella Cooper, new species 9™ 



(7-10) Respectively anterior, side, pedicle, and brachial views, X *, of the holotype, 

 123267b. 



Arline formation (upper), north side of old road in glade, i mile southeast 

 of Friendsville, Concord (T.V.A. 138- SW) Quadrangle, Tenn. 



D. Macrocoelia elegantula Cooper, new species 893 



(n-13) Respectively pedicle, side, and brachial views of a nearly perfect indi- 

 vidual, X 1, paratype, 117772. 



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

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

 Va. 



E. Opikina speciosa Cooper, new species 9 J 8 



(14-16) Respectively brachial, side, and pedicle views of a large and complete 

 specimen, X I, paratype, 117833c 



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

 of Murfreesboro, Rutherford County, Tenn. 



F. Opikina lirata Cooper, new species 9 12 



(17-20) Respectively anterior, posterior, side, and pedicle views of a complete 

 specimen, X I, holotype, H78i6d; (21, 23) brachial and pedicle views of a com- 

 plete specimen, X I, paratype, 117816b; (22) brachial view of a large specimen, 

 X 1, paratype, 117816a; (24) interior of the brachial valve showing thickened 

 anterior margin, X I, paratype, 117816c; (25) fragmentary brachial valve, X 2, 

 showing cardinalia and adductor ridges, paratype, 117816! 



Decorah formation (Ion member), 1.1 miles east of U. S. Highway 52, south 

 edge of Cannon Falls, Goodhue County, Minn. 



Plate 248 



PlONOMENA, RHIPIDOMENA, StEOPHOMENA 



A. Strophomena canadensis Wilson 93 2 



(1) Brachial view, X i> of the holotype, G.S.C. 6220. 



Pamelia formation, first terrace above house on road, MacLaren Landing, 

 22 miles west of Ottawa, Ontario, Canada. 



B. Rhipidomena sp. 1 &73 



(2) Imperfect brachial exterior, X 1, figured specimen, 117698; (3) ornamenta- 

 tion, X 2, of the preceding specimen. 



Arline formation, north side of wagon road in glade, \ mile southeast of 

 Friendsville, Concord (T.V.A. 138-SW) Quadrangle, Tenn. 



C. Pionomena pnlchra Cooper, new species 9°3 



(4, 7) Respectively X 1 and X 2 enlargements of a small slab with numerous 



individuals, X I, paratype, 123275c; (5) another small slab showing a brachial 



exterior, X 2, holotype, 123275b ; (6) pedicle exterior, X 2, from part of 123275c. 



Carlim formation (base) = Grazier member of Hatter formation, Elk Run, 



3 miles southwest of Nealmont, Tyrone (15') Quadrangle, Pa. 



