﻿PART II CHAZYAN AND RELATED BRACHIOPODS — COOPER IIO7 



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 Athens formation (base), just above the quarry at the railroad crossing 1 mile 

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



D. Mimella piger (Billings) 481 



(20-23) Respectively side, brachial, pedicle, and anterior views, X I, hypotype, 

 Y.P.M. 15823. 



Mingan formation, Parroquet Island, Mingan Group, St. Lawrence River, 

 Canada. 



E. Skenidioides convexus Cooper, new species 492 



(24-28) Respectively brachial, anterior, posterior, side, and pedicle views of a com- 

 plete specimen, X 4, holotype, 117070a; (29-32) respectively side, pedicle, poste- 

 rior, and brachial views of an imperfect specimen, X 4, paratype, 117070b; (33) 

 interior of the pedicle valve, X 4, showing spondylium, paratype, 117070c; (34) 

 brachial interior showing septum and cardinalia, X 4, paratype, H707od. 

 Horizon and locality same as A above. 



F. Elasmothyris concinnula Cooper, new species 985 



(35-39) Respectively side, brachial, pedicle, posterior, and anterior views, X 5, 

 of the holotype, 117371a; (40) pedicle interior showing the muscle plate, X 8, 

 paratype, 117371c; (41) brachial interior showing median septum and cardinalia, 

 X 8, paratype, H737id; (42) pedicle exterior of a large specimen, X 5, paratype, 

 U737ib. 

 Horizon and locality same as A above. 



G. Kullervo punctata Cooper, new species 528 



(43. 45) Respectively X 2 and X 3 enlargements of a pedicle valve seen from the 

 posterior side to show the elaborate spondylium, holotype, 117018a; (44) inte- 

 rior of the brachial valve showing the greatly thickened cardinalia, X 2, para- 

 type, 117018b; (46) a fragmentary specimen showing the exterior ornamentation, 

 X 2, paratype, 117018c: Note small pseudodeltidium at apex of holotype. 



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

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



H. Eremotoechia silicica Cooper, new species 515 



(48) Exterior of the brachial valve, X 2, holotype, 117064a; (49) another bra- 

 chial exterior, X 2, paratype, 117064b; (50, 51) interior and posterior views, 

 X 3, of the preceding brachial valve showing the cardinalia; (52) exterior of an 

 imperfect pedicle valve, X 2, paratype, 117064c; (47) interarea of the preceding 

 pedicle valve, X 3, showing the pseudodeltidium. 

 Horizon and locality same as A above. 



I. Ancistrorhyncha crassa Cooper, new species 623 



(S3"SS) Side, anterior, and brachial views of a small adult, X 2, paratype, 111178b; 

 (56-60) respectively pedicle, posterior, side, anterior, and brachial views of the 

 holotype, X 2, 111178a; (61) brachial view, X I, of the holotype. 



Peery formation, 7 miles southwest of Clinton, Clinton (T.V.A. 137-SW) 

 Quadrangle, Tenn. 



J. Oxoplecia holstonensis Willard 545 



(62, 64) Exterior and interior of a pedicle valve showing the pseudodeltidium with 

 its elevated ridge, X 2, hypotype, 1 171 08; (63) exterior, X 1, of the same 

 specimen. 



Horizon and locality same as G above. 



K. Onychoplecia brezrirostris Cooper, new species 53° 



(65-69) Respectively pedicle, brachial, anterior, posterior, and side views, X 3, 

 holotype, 117089a; (70) brachial exterior of the preceding specimen, X 4, show- 

 ing the ridge on the pseudodeltidium. 

 Lenoir formation (shale band in the calcarenite below the Mosheim lime- 



