﻿PART II CHAZYAN AND RELATED BRACHIOPODS — COOPER 1 1 57 



Plate 150 

 Paurorthis 



Page 



A. Paurorthis longa Cooper, new species 9°8 



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

 plete specimen, X 2, holotype, 117282b; (6) brachial view of another complete 

 specimen, X 2, paratype, 117282a; (7) side view of a third specimen, X 2, para- 

 type, 1172821 ; (8) pedicle interior, X 2, showing deep delthyrial cavity, paratype, 

 H7282g; (9) pedicle interior showing ridge extending anteriorly from the front 

 margin of the muscle area, X 2, paratype, 117282J ; (10) another pedicle interior, 

 showing the teeth, their fossettes, and anterior median ridge, X 2, paratype, 

 117282c; (11) brachial interior, X 2, showing adductor pits and brachiophores, 

 paratype, 117282k; (12, 13) exterior and interior of the brachial valve, X 3. 

 paratype, 117282c; (14) brachial interior of an obese specimen, X 2, showing 

 deeply inset adductor scars and thickened brachial plates, paratype, 117282b; 

 (16) fine brachial interior, X 3. showing cardinalia, paratype, 117282I 



Arline formation, 100 yards southwest of the Negro Cemetery £ mile north- 

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

 (15) Brachial interior, showing cardinalia, X 3, paratype, 117283d. 



Arline formation, north side of wagon road in glade, \ mile southeast of 

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



B. Paurorthis jasciculata Cooper, new species • • • 9^5 



(17) Brachial view, X 1, of the holotype, 117280a; (18-22) respectively side, 

 anterior, posterior, brachial, and pedicle views, X 2, of the preceding specimen ; 

 (23, 24) respectively X 2 and X 3 views of the pedicle interior, showing the 

 pallial sinuses exceptionally well developed, paratype, 117280b. 



Little Oak formation, intersection of the Bailey Gap road with the main road, 

 1 1 mile northeast of Newhope Church, SW^SWi sec. 13, T, 19 S., R. 2 W., 

 Vandiver (15') Quadrangle, Ala. 



C. Paurorthis sp. 1 • • 973 



(25-29) Respectively anterior, side, posterior, brachial, and pedicle views, X 2, of 

 a figured specimen, 117299a; (30) the preceding, X 1, in brachial view. ■ 



Athens formation (base), 600 feet S. 40° E. of the railroad and highway 

 crossing 1 mile northeast of Athens Courthouse, Athens (T.V.A. 125-NE) 

 Quadrangle, Tenn. 



(31, 32) Respectively X I and X 2 enlargements of an impression of the brachial 

 interior showing the adductor scars and anterior pallial trunks, figured specimen, 

 117298a; (33) another brachial interior impression showing the muscle scars and 

 pallial sinuses, X 2, figured specimen, 117298b; (34) another brachial interior 

 impression, X 2, figured specimen, 117298c; (35) impression of the pedicle inte- 

 rior, X 2, showing pallial trunks, figured specimen, n7298d; (36) another pedicle 

 interior impression, showing the pallial and muscle marks, X 2, figured specimen, 

 117298c; (37) exterior, X 2, of the preceding. 



Athens formation (base), just east of the road junction, 2\ miles south- 

 southeast of Riceville, Calhoun (T.V.A. 125-SW) Quadrangle, Tenn. 



Plate 151 

 Paurorthis 



A. Paurorthis macrodeltoidca Cooper, new species 969 



(1) Brachial view, X 1, of the holotype, 117284a; (2-5) respectively brachial, 

 anterior, pedicle, and side views, X 2, of the holotype; (6) enlargement of the 

 exterior of part of the brachial valve, X 6, paratype, 117285. 



