﻿PART II CHAZYAN AND RELATED BRACHIOPODS — COOPER IO75 



Page 

 holotype, 98184a; (5) specimen with valves naturally separated showing chilidial 

 plate, interarea, and delthyrium, X 2, paratype, 98184b. 



Arline formation, old quarry on the north side of Marion, Marion (T.V.A. 

 218-SE) Quadrangle, Va. 



B. Productorthis agilcra (Willard) 335 



(7, 25) Pedicle and posterior views of the cardinalia, X 2, hypotype, 109890a; 

 (8-1 1 ) respectively side, pedicle, posterior, and brachial views of an exfoliated 

 specimen, X 1, figured specimen, 109899a; (12) exterior of a brachial valve, 

 X 1, hypotype, 109891a; (13) brachial interior showing adductor scars, X 1, 

 hypotype, 10989^; (14, 15) pedicle interiors, X I, hypotypes, 109891^ 109890b; 

 (18) brachial exterior, X I, hypotype, 109890c; (21-24) respectively pedicle, 

 posterior, side, and brachial views of an unusually fine complete specimen, X 1, 

 hypotype, I09890d. 



Effna formation (slope of reef), Porterfield Quarry, 5 miles east of Saltville, 

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



(6) Posterior view of the cardinal process, X 4, hypotype, 109895a; (19) brachial 

 exterior, X I, of same; (16) brachial view of a complete but exfoliated speci- 

 men, X 1, hypotype, 109895c; (17) impression of the pedicle interior prepared 

 by burning shell, X 1, hypotype, 109896 ; (20) pedicle exterior of an exfoliated 

 specimen, X 1, hypotype, 100895b. 



EfFna formation, McNutt Quarry, 6 miles (airline) southeast of Ceres and 

 12 miles southwest of Bland, Burkes Garden (15') Quadrangle, Va. 



C. Multicostella fasciculata (Butts) 418 



(26, 27) Pedicle and brachial views, X 1, of the holotype, 71493; (28) brachial 

 view, X 2, of same. 



Little Oak formation, \ mile north of Pelham, 660 feet east of the intersection 

 of main Cahaba Valley road with Helena road, Bessemer Iron District (15') 

 Quadrangle, Ala. 



Plate 57 

 Dinorthis 



A. Dinorthis atavoides Willard 393 



(1-4) Respectively pedicle, brachial, posterior, and side views of a large specimen, 



X 1, hypotype, 98216a. 

 Lincolnshire formation, Marcem Quarry, 2 miles west of Gate City, Gate City 



(T.V.A. 188-NE) Quadrangle, Va. 

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



specimen, X 1, hypotype, 110283k; (10) brachial interior, X 2, hypotype, 



1102836; (11) pedicle interior showing muscle area and scars, X 2, hypotype, 



H0283g. 

 Lincolnshire formation, \ mile north of Eidson, Kyles Ford (T.V.A. 170-SE) 



Quadrangle, Tenn. 



B. Dinorthis sweeneyi (N. H. Winchell) 397 



(12) Pedicle interior, X I, showing muscle scars and small pseudodeltidium, fig- 

 ured specimen, 48861; (13) posterior of pedicle valve, X 2, showing interarea, 

 and small pseudodeltidium of same specimen. 



Decorah formation (Ion member), St. Paul, Minn. 



C. Dinorthis holdeni (Willard) 395 



(14) Pedicle interior, X I, hypotype, 110304^ (15, 28) respectively X 1 and X2 

 enlargements of the pedicle interior, hypotype, ii0304g; (27) brachial interior, 

 X 2, hypotype, no304d; (16) pedicle exterior, X l, hypotype, 110304c 

 Elway formation, on the road to Mountain Lake, at the road fork, \ mile north 



