﻿PART II CHAZYAN AND RELATED BRACHIOPODS — COOPER IO4I 



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 type, 116795b; (26) posterior of same, X 15; (V) exterior of the brachial valve 

 showing the spines, X 10, paratype, 116795c. 

 Horizon and locality same as preceding. 



E. Torynelasma toryniferum Cooper, new species 258 



(28, 29) Exterior and interior of a nearly perfect brachial valve, X 10, paratype, 

 116824c; (30) same specimen showing spoon on median septum, X4I (35. 36) 

 side and tilted views of the preceding, X 8, showing septum and spoon; (31-33) 

 posterior, side, and anterior views of the pedicle valve, X 4. paratype, 1 16824a ; 

 (34) another, but slightly damaged, pedicle valve, X 4, paratype, 116824b. 

 Horizon and locality same as preceding. 



F. Rhysotreta corrugata Cooper, new species 259 



(37-40) Respectively apical, posterior, anterior, and side views of a pedicle valve, 

 X 10, showing fairly large apical foramen and corrugated ornamentation, holo- 

 type, 116817a; (41) exterior of the brachial valve, X 10, paratype, 116817b; 

 (42) young pedicle valve in apical view showing the large foramen, ca. X 20, 

 paratype, 116817c; (43, 44) interior and side view of the brachial valve, X 10, 

 showing septum, paratype, n68i7d; (45, 46) brachial valve tilted to side to show 

 septum, and same specimen in posterior view, X 10, paratype, 116817c; (50) 

 exterior, X 8, of the same brachial valve as preceding; (47, 49) side and interior 

 views of an old brachial valve showing septum and muscle scars, X 8, paratype, 

 Ii68i7f ; (48) posterior view of a large pedicle valve, X 10, showing elongate 

 smooth track and foramen, paratype, n68i7g (specimen broken in photo- 

 graphing). 

 Horizon and locality same as preceding. 



G. Conotreta ? altirostra Cooper, new species 248 



(51-53) Anterior, side, and posterior views of a pedicle valve, X 4» holotype, 

 116812. 



Botetourt formation, in the field on the south side of the road 0.2 mile east 

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



H. Paterula perfecta Cooper, new species 238 



(54) Exterior of the brachial valve showing the small apex, X 4> paratype, 

 116799b; (55) exterior of the pedicle valve showing the notch at the apex, X 4> 

 paratype, 116799c; (56) posterior portion of pedicle valve showing notch and 

 traces of muscle marks, X 10, paratype, 116799a. 



Pratt Ferry formation (lower 3 feet), 0.2 mile northeast of Pratt Ferry, 

 Blocton (15') Quadrangle, Ala. 



I. Torynelasma minor Cooper, new species 257 



(57. 58) Side and anterior views of a pedicle valve, X 8, paratype, 116823d; (59) 

 interior of an imperfect brachial valve showing short spoon and high septum, 

 X 20, paratype, 116823c; (60, 62, 64) side, tilted, and normal interior views of 

 a brachial valve showing the spoon and muscle marks, X 20, holotype, 116823a; 

 (61, 63) another brachial valve smaller than the preceding, X 20, paratype, 

 116823b. 

 Horizon and locality same as preceding. 



J. Scaphclasma septatum Cooper, new species 260 



(65, 66) Respectively enlargement of the apical region and exterior view of a pedi- 

 cle valve showing foramen, X 10, X 20, holotype, 116819a; (67) posterior view 

 of another pedicle valve showing foramen and groove posterior to it, X 10, para- 

 type, 116819b; (68) side view of the pedicle valve, X 10, paratype, 116819c; 

 (69) inside of a pedicle valve showing pedicle tube, X 10, paratype, Ii68i9d; 

 (70) interior of the brachial valve showing the median septum, X 10, paratype, 

 116819c; (71) brachial valve in interior view tilted to side to show septum in 

 partial profile, X 10. paratype, n68i9f ; (72) full view of another brachial inte- 



