﻿PART II CHAZYAN AND RELATED BRACHIOPODS — COOPER I183 



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 Dark shale under Eureka quartzite, 4.2 miles north-northeast of Martin 

 Ranch, Roberts Mountains (i°) Quadrangle, Nev. 



B. Bimuria parvula Cooper, new species 769 



(4) Exterior of a small pedicle valve, X 2, paratype, 123253a. 



Edinburg formation (Cyrtonotella zone), south side of road 0.2 mile east of 

 Strasburg Junction, Strasburg (15') Quadrangle, Va. 



C. Bimuria superba Ulrich and Cooper 771 



(5) Pedicle exterior, X 1, hypotype, 11472a. 



Botetourt formation, north side of Virginia Highway 1 14, 2.3 miles west of the 

 Montgomery-Roanoke County line, 12 miles northeast of Blacksburg, Va. 



D. Titanambonites praecursor Cooper, new species 722 



(6-9) Respectively posterior, anterior, pedicle, and brachial views of a damaged 

 but complete specimen, X I, holotype, 117431a; (10, 11) respectively X 1 and 

 X 1 2 views of brachial valve showing cardinalia and pallial marks, paratype, 

 117431b; (12) incomplete pedicle interior, X I, showing long diductor scars, 

 paratype, 117431c. 



Lenoir formation (lower part of the Billing saria zone), south side of road in 

 section 1 mile northeast of Friendsville, east edge of Concord (T.V.A. 138-SW) 

 and adjacent Louisville (T.V.A. 138-SE) Quadrangles, Tenn. 



E. Palaeostrophomena superba Cooper, new species 706 



(13) Brachial view of a complete specimen, X I, paratype, 117381a; (14-16) 

 posterior, anterior, and side views, X 2, of the preceding specimen; (17) pedicle 

 exterior, X 2, showing the ornamentation, paratype, 117381c; (18) pedicle inte- 

 rior, X 2, showing muscle and pallial marks, paratype, 117381b. 



Arline formation (lower), 100 yards southwest of the Negro Cemetery, \ mile 

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



F. Isophragma extensum Cooper, new species 735 



(19-22) Respectively posterior, anterior, side, and pedicle views of a complete 

 specimen, X 2, paratype, 1 17375. For brachial view see pi. 170, C, fig. 17. 



Little Oak formation, junction of Bailey Gap road and main Cahaba Valley 

 road, if miles northeast of Newhope Church, SW|SWi sec. 13, T. 19 S., 

 R. 2 W., Vandiver (15') Quadrangle, Ala. 



G. Sowerbyites lamellosus Cooper, new species 728 



(23, 24) Pedicle and brachial views of a complete specimen, X I, paratype, 

 117403a; (25) brachial view of the preceding specimen, X 2, showing lamellae 

 interarea; (26) brachial interior, X 2, showing septa, cardinalia, and pallial 

 marks, paratype, 117403b; (27) imperfect pedicle interior showing muscle area, 

 X 2, paratype, 117403c. 



Bromide formation (Mountain Lake member — massive "reef" limestone), 

 west side of the road cut on Oklahoma Highway 18, 1.8 miles south of Sulphur, 

 Murray County, Okla. 



Plate 185 



Hespeeomena, Syndielasma, Titanambonites 



A. Hesperomena leptellinoidea Cooper, new species 745 



(1) Pedicle exterior, X 1, holotype, 117560; (2) same view, X2 , of holotype; 

 (3) posterior view of the pedicle valve of the holotype, X 3, showing apical 

 foramen and pseudodeltidium ; (4) pedicle interior, X 1, holotype; (5) same 

 view as preceding, X 2, showing vague outline of muscle area and pseudopunctate 

 interior surface; (6) side view, X 1, of holotype; (7) brachial view, X 2, of 

 holotype; (8) brachial interior, X 1, of holotype; (9) same view as preceding, 

 X 2, showing median ridge, subperipheral thickening, and cardinalia; (10) pos- 



