﻿PART II CHAZYAN AND RELATED BRACHIOPODS — COOPER III3 



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 Benbolt formation (lower), north side of U. S. Highway 19, if miles south- 

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

 (14) Pedicle valve, X 2, showing interarea and pseudodeltidium, paratype, 1 171 12. 

 Chatham Hill formation, Grayson Farm, 4 miles southwest of Bland, Bland 

 County, Va. 

 (16) Pedicle interior tilted to show dental plates, teeth, and edge of pseudodel- 

 tidium, X 2, paratype, 117113c; (17, 18) respectively two views of the pedicle 

 interior, one tilted to show the teeth and pseudodeltidium, the other to show the 

 interarea, X 2, paratype, 117113b; (19) interarea of the pedicle valve, X 3. 

 showing pseudodeltidium and narrow ridge characteristic of the Triplesiidae, 

 paratype, 117113J; (23, 24) posterior and pedicle views of the brachial interior 

 showing the cardinal process and brachial plates, X 2, paratype, 117113a; (25) 

 posterior view of the cardinal process showing myophore slits in each prong, 

 X 3, paratype, 117113c; (26) cardinal process seen from the inside and showing 

 a brachial plate, X 3, paratype, 117113b. 



Chatham Hill formation, on Marion to Chatham Hill road, 6 miles north of 

 Marion, Chatham Hill (T.V.A. 218-NE) Quadrangle, Va. 



Plate 106 

 Camerella, Oxoplecia, Parastrophina, Porambonites 



A. Camerella sp. 1 586 



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

 plete specimen, X I, figured specimen, H7i49d. 



Benbolt formation (lower), 0.1 to 0.2 mile north of the road, I.I miles north- 

 east of Lee Valley, Lee Valley (T.V.A. 171-NW) Quadrangle, Tenn. 



B. Oxoplecia globularis Cooper, new species 544 



(6-10) Respectively posterior, anterior, brachial, side, and pedicle views of a com- 

 plete specimen, X 1, holotype, 117098b; (n) side view of another specimen 

 showing rotund profile, X I, paratype, 117098c. 



Martinsburg formation (part with Brongniartella and referable to the Salona 

 formation), on Virginia County Highway 617 = 910, 0.15 mile north of Green 

 Mount Church, Broadway (15') Quadrangle, Va. 



C. Oxoplecia parva Cooper, new species 552 



(12, 14, 15) Respectively pedicle, side, and brachial views of a complete specimen, 

 X l'i paratype, 117117a; (13, 16) pedicle and side views of another specimen 

 slightly compressed laterally, X 1, paratype, 117117b. 



Benbolt formation (lower), 0.1 mile south of the middle fork of Moccasin 

 Creek, ii miles south of Hansonville, Hansonville (T.V.A. 205-SW) Quad- 

 rangle, Va. 



D. Porambonites ? sp. 3 610 



(17-19) Respectively exterior, side, and anterior views of a large pedicle valve, 

 X 5, figured specimen, 117178. 



Pogonip group (Orthidiella zone), about 1 mile above the mouth of White- 

 rock Canyon, Monitor Range, Roberts Mountains (1°) Quadrangle, Nev. 



(20) Exterior of a pedicle valve, X 6, figured specimen, 111371a; (24) interior, 

 X 5, of the preceding specimen; (23) same as preceding, X 4, tilted to show 

 dental plates; (21, 22) respectively two views of a brachial interior, tilted to 

 show edges of brachiophore plates and in normal view, X 4, figured specimen, 

 111371b. 



Upper Pogonip group (Orthidiella or mottled zone 700 feet below the Eureka 

 quartzite), near the base of the first ridge east of Frenchman Flat, Las Vegas 

 (i°) Quadrangle, Nev. 



