﻿PART II CHAZYAN AND RELATED BRACHIOPODS — COOPER 1 1 53 



Plate 146 



Cvclomyonia, Dalmanella, Diorthelasma, Eremotrema, Laticrura, 

 Paurorthis, Phragmorthis 



Page 



A. Laticrura pionodema Cooper, new species 983 



(1-3) Interior, exterior, and side views of a pedicle valve, X 3, paratype, H727ig; 

 (4) brachial interior, X 3, showing long flat brachiophores, paratype, 117271b. 

 Pratt Ferry formation, 0.2 mile southeast of Pratt Ferry, Blocton (15') Quad- 

 rangle, Ala. 



B. Diorthelasma parvum Cooper, new species 998 



(5-9) Respectively anterior, brachial, posterior, pedicle, and side views of a com- 

 plete specimen, X 4, holotype, 117322a; (10) brachial view of another complete 

 specimen, X 4, paratype, 117322b; (11) pedicle exterior, X 4, paratype, 117322c; 

 (12) brachial exterior, X 4, specimen missing; (13) pedicle exterior, X 4, oi 

 preceding; (14-17) respectively normal, tilted, posterior, and inclined views of 

 the brachial interior, X 6, showing muscle scars, brachiophore supporting plates, 

 brachiophores, and fulcral plates, paratype, H7322d; (18) pedicle interior show- 

 ing the muscle scars, X 6, paratype, 117322c; (19) brachial interior showing the 

 brachiophore supports and cardinal process, X 6, paratype, H7322f; (20-22) 

 three views of another brachial valve showing brachiophores, supporting plates, 

 and cardinal process, X 6, paratype, ii7322g; (23) another brachial interior 

 showing muscle scars and cardinalia, X 6, paratype, 117322b. 

 Horizon and locality same as preceding. 



C. Dalmanella crassicostellata Cooper, new species 949 



(24-28) Respectively anterior, side, posterior, pedicle, and brachial views, X I, 

 of the paratype, 117361a; (29, 30) the brachial interior in normal view and 

 tilted to show the brachiophore supporting plates, X 4, paratype, H736if. 



Hermitage formation (lower), on Tennessee Highway 53, 0.7 mile south of 

 Woodbury, Woodbury (15') Quadrangle, Tenn. 



D. Phragmorthis buttsi Cooper, new species 5 10 



(3 I > 3 2 ) Interior and exterior of a large pedicle valve showing the pallial trunks, 

 X 4, paratype, 116960a; (33, 34) exterior and interior of the brachial valve 

 showing septum and cardinalia, X 4, paratype, 116960b; (35, 36) respectively 

 X 3 and X 4-5 enlargements of a brachial interior tilted to show the median 

 septum, paratype, 116960c; (37) brachial interior showing cardinalia, X 3, 

 paratype, n696od; (38) brachial interior tilted to show the posterior edges of 

 the long brachiophores, X 4, paratype, 116960b. 

 Horizon and locality same as A above. 



E. Paurorthis ponderosa Cooper, new species 971 



(39-43) Respectively pedicle, posterior, side, anterior, and brachial views of a 

 large and complete specimen, X 1, holotype, 117294a. 



Benbolt formation (lower), 0.2 mile south of the middle fork of Moccasin 

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

 rangle, Va. 



F. Cyclomyonia pecidiaris Cooper, new species 975 



(44-48) Respectively pedicle, posterior, brachial, side, and anterior views of a 

 young, complete specimen, X 4, paratype, 117300a; (49, 50) exterior and interior 

 of a young pedicle valve showing the callosity anterior to the muscle area and 

 the pallial marks on each side of it, X 4, paratype, 117300b; (51, 52) side and 

 exterior views of an adult pedicle valve, X 2, holotype, 117300c; (53) interior of 

 the preceding pedicle valve, X 3, showing callosity anterior to muscle area ; 

 (54) interior of an imperfect pedicle valve showing the callosity anterior to the 

 muscle area, X 2, paratype, U7300d; (55, 56) exterior and interior of a brachial 



