﻿PART II CHAZYAN AND RELATED BRACHIOPODS — COOPER IO85 



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G. Multicostella semisidcata Cooper, new species 427 



(36-40) Respectively posterior, side, anterior, pedicle, and brachial views of a 

 large specimen, X I, paratype, 110433. 



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

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



H. Dinorthis venusta Cooper, new species 401 



(41-45) Respectively posterior, anterior, side, brachial, and pedicle views of a 

 small but perfect specimen, X I, paratype, 110286b; (46-50) respectively brachial, 

 posterior, side, anterior, and pedicle views of a large and perfect specimen, X I, 

 holotype, 110286a. 



Red Knobs formation, 2 miles southeast of Kiser, Meadow (T.V.A. 139-N W) 

 Quadrangle, Tenn. 



Plate 72 

 Chaulistomella, Dinorthis, Valcourea 



A. Dinorthis tenuis Cooper, new species 397 



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

 complete specimen, X I, holotype, 1 16974. 



Sevier formation, east side of the road 2.7 miles S. 7° W. of Athens, Athens 

 (T.V.A. 125-NE) Quadrangle, Tenn. 



B. Chaulistomella inaequistriata Cooper, new species 435 



(6-10) Respectively pedicle, posterior, anterior, brachial, and side views, X 1, of 

 a paratype, 110488a; (11) pedicle interior, X I, paratype, 110488b. 



Dryden formation, Lone Mountain to Tazewell road, 1^ miles northeast of 

 Lone Mountain, Tazewell (T.V.A. 154-NE) Quadrangle, Tenn. 

 (12, 13) Respectively Xi and X2 views of the brachial interior, paratype, 

 116998a. 



Dryden formation, road along Little Sycamore Creek, 0.35 mile northeast of 

 Halls School, Tazewell (T.V.A. 154-NE) Quadrangle, Tenn. 



C. Valcourea plana Cooper, new species 409 



(14-18) Respectively pedicle, posterior, anterior, side, and brachial views of a 

 complete specimen, X i, holotype, 1 16967. 



Yellow limestone on 25-foot sandstone at base of Eureka group, 2 miles north 

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

 (19) Brachial view of an alate specimen, X 1, paratype, 116968a; (20, 21) respec- 

 tively X 1 and X 2 enlargements of a partially exfoliated specimen showing part 

 of the pallial trunk system, paratype, 116968b. 



Same as preceding but 3 miles north of Martin Ranch. 



D. Valcourea transversa Cooper, new species 413 



(22-26) Respectively pedicle, brachial, posterior, anterior, and side views of a com- 

 plete specimen, X l, holotype, 116971. 



Bromide formation (Mountain Lake member — 49 to 66 feet above the basal 

 sand), Spring Creek, sec. 17, T. 2 S., R. 1 W., Murray County, Okla. 

 ( 2 9» 30) Interior and posterior views of a brachial valve showing muscle area and 

 pseudodeltidium, X 2, paratype, n6972d; (28) exterior, X 2, of preceding; (31) 

 same, X 4, showing ornamentation in detail ; (27) brachial interior, X 2, show- 

 ing cardinalia and pallial trunks, paratype, 116972b. 



Bromide formation (Mountain Lake member — Valcourea bed in shale above 

 calcarenite) at base of section, on Oklahoma Highway 99, 3 miles south of Fitts- 

 town, Pontotoc County, Okla. 



