﻿PART II CHAZYAN AND RELATED BRACHIOPODS — COOPER 1 1 55 



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 tilted to show callosity anterior to muscle area, X 3, paratype, 116947a; (7) 

 pedicle interior, X 3, showing teeth, paratype, 116947c; (8, 9) interior and exte- 

 rior of a specimen preserving both valves in contact but broken through the mid- 

 dle, showing high median septum and long, slender brachiophore, X 4, paratype, 

 1169471; (10) brachial interior, X 6, showing deep notothyrial cavity with traces 

 of cardinal process and strong median septum, paratype, 116947b; (11) same 

 specimen as preceding, X 6, but tilted to the side to show high median septum 

 and long brachiophore. 



Edinburg formation (base of Liberty Hall facies, just above Botetourt forma- 

 tion), 1.8 miles S. 4 W. of Bethel Church, 5.9 miles due east of Harrisonburg, 

 Harrisonburg (15') Quadrangle, Va. 



C. Phragmorthis buttsi Cooper, new species 5 10 



(12-17) Respectively anterior, side, posterior, brachial, pedicle, and brachial 

 tilted so as to show delthyrium, X 2, holotype, 116959m; (18) pedicle interior, 

 X 2, showing form of muscle area and callosity anterior to it and pallial trunks 

 bounding it, paratype, 116959k; (19) brachial interior, X 2, paratype, 1 16959b; 

 (20) same as preceding, X 4, showing deep notothyrial cavity; (21) preceding 

 specimen, X 4, tilted to show high median septum and elevated plates under 

 adductor field and long brachiophore ; (22) same as preceding, X 4, showing 

 plates under adductor field and small cardinal process; (23) brachial interior 

 tilted to show high median septum and long brachiophores, X 3, paratype, 

 116959-I; (24) another brachial interior tilted to show the long brachiophores 

 and adductor plates, X 3, paratype, n6959d; (25, 26) pedicle interior in normal 

 view and tilted to show form of muscle area and callosity anterior to it, X 4> 

 paratype, 116959b. 



Effha-Rich Valley formations, Porterfield Quarry, 5 miles east of Saltville, 

 Maccrady (T.V.A. 218-NW) Quadrangle, Va. 



D. Reuschella edsoni (Bassler) 978 



(27) Exterior of a partially exfoliated pedicle valve, X I, paratype, 66169c; (28) 

 partially exfoliated pedicle valve showing an impression of the muscle area, X T , 

 lectotype, 66i6od; (29) exterior of an exfoliated brachial valve, X I, paratype, 

 66169b. 



Trenton Group (Sherman Fall formation), Shipyard Bay, Highgate Springs, 

 St. Albans (15') Quadrangle, Vt. 



Plate 149 

 Fascifera, Laticrura, Paurorthis 



A. Fascifera dalmanelloidea Cooper, new species 999 



(1-3) Pedicle, side, and brachial views of a complete specimen, X 2, paratype, 

 1 17308. 



Bromide formation (Mountain Lake member — top of bed 10), \ mile west of 

 U. S. Highway 77, NW} sec. 25, T. 2 S., R. 1 E., Carter County, Okla. 



B. Laticrura latibrachiata Cooper, new species 981 



(4-8) Respectively posterior, brachial, side, pedicle, and anterior views of a com- 

 plete specimen, X 2, paratype, 117264c; (9) posterior view of the preceding, X 3. 

 showing apical plate. 



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

 i mile northeast of Friendsville, Concord (T.V.A. 138-SW) Quadrangle, Term. 



C. Paurorthis magna Cooper, new species 9^9 



(10-14) Respectively pedicle, brachial, side, anterior, and posterior views of a com- 

 plete specimen, X 1, paratype, 117291b; (16, 18) side and brachial views of a 

 complete specimen, X 1, paratype, 117291a. 



