﻿PART II CHAZYAN AND RELATED BRACHIOPODS — COOPER IO87 



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 view showing myophore of cardinal process, X 1, paratype, 110208b; (14) same, 

 X 3, showing carinate myophore. 



Tulip Creek formation (top), SE-|SW^ sec. 22, T. 2 S., R. 3 E., on west slope 

 of hill in road ditch, i^ miles west of Nebo, Murray County, Okla. 



B. Valcourea strophomenoid.es ( Raymond) 41 1 



(17, 22) Side and brachial views of a complete specimen, X 1, holotype, Carnegie 

 Mus. 5450; (15) brachial view, X 2, of same. 



Crown Point formation, Plattsburg, Plattsburg (15') Quadrangle, N. Y. 

 (16) Pedicle interior, X I, paratype, Carnegie Mus. 5467; (19) posterior of same 

 specimen, X 2, showing muscle area; (18, 21, 20) respectively brachial, pedicle, 

 and posterior views of a nearly perfect specimen, X 2, paratype, Carnegie Mus. 

 5402; (25) part of pedicle valve, X 4, of preceding specimen; (23) pedicle inte- 

 rior, X 3, paratype, Carnegie Mus. 5466; (24) pedicle exterior showing fold, 

 X 2, paratype, Carnegie Mus. 5467 (on same piece as specimen represented by 

 fig. 16). 



Crown Point formation, near the Fair Grounds, Plattsburg, Plattsburg (15') 

 Quadrangle, N. Y. 



Plate 75 

 Valcourea 



A. Valcourea brevicarinata Cooper, new species 406 



(1) Pedicle interior, X 2, paratype, 110248a; (3) exterior, X 1, of the preceding; 



(2) brachial interior, X 2, paratype, 110248b; (4, 5) respectively X I and X2 

 enlargement of the brachial valve of a complete specimen, holotype, 110248c. 



Upper Arline formation, on north side of wagon road in glade, \ mile south- 

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



B. Valcourea austrina Cooper, new species 405 



(6-9) Respectively brachial, pedicle, side, and anterior views of a complete speci- 

 men, X 1, holotype, 98177a; (10-12) respectively pedicle, posterior, and brachial 

 views, X 2, of the holotype; (13-15) brachial, pedicle, and side views of a com- 

 plete specimen, X 1, paratype, 110195a; (16, 17) posterior and pedicle views, 

 X 2, of the preceding; (25) pedicle interior, X 2, paratype, 98177b; (26) pedicle 

 interior, X 2, paratype, 98i77d; (27) interior of brachial valve showing cardi- 

 nalia, X 3, paratype, 98177c 



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

 Lexington (15') Quadrangle, Va. 



(18-22) Respectively pedicle, brachial, anterior, posterior, and side views of a 

 large and obese specimen, X 1, paratype, 116965b; (23, 24) respectively X 2 and 

 X 1 views of a pedicle interior, paratype, 116965a. 



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

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

 Va. 



Plate 76 



Chaulistomella, Valcourea 



A. Valcourea obscura Cooper, new species 409 



(1, 2) Respectively X 1 and X2 enlargements of the pedicle interior, paratype, 

 1 16966; (3, 7) pedicle and posterior views of a complete specimen, X 1. holo- 

 type, 110254c; (4, 5) same view, X2; (6, 8, 9) respectively pedicle, side, and 

 brachial views of a specimen younger than the preceding, X I, paratype, H0254d; 

 (10) brachial view, X 2, of the same specimen. 



