﻿PART II CHAZYAN AND RELATED BRACHIOPODS — COOPER IO77 



Plate 59 

 Dinorthis 



Page 



A. Dinorthis willardi Cooper, new species 4 02 



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

 plete specimen, X I, holotype, 116981c; (6, 7) pedicle and brachial views of a 

 larger specimen, X 1, paratype, 116981b; (8) pedicle view of a very large indi- 

 vidual, X 1, paratype, 116981a. 



Lincolnshire formation (Hogskin member), Sally Cleveland Farm, £ mile 

 southwest of Washburn, Dutch Valley (T.V.A. 154-SE) Quadrangle, Term. 



(9) Pedicle interior, X 2, paratype, 116983b; (11) muscle area of same, X 3, 

 showing small pseudodeltidium ; (16) posterior view, X 3, of same, showing 

 pseudodeltidium ; (14, 15) respectively X 1 and X 2 enlargements of the brachial 

 interior, paratype, 116983c. 



Lincolnshire formation (Hogskin member), Evans Ferry section along U.S. 

 Highway 25E, £ mile north of Indian Creek, Howard Quarter (T.V.A. 

 162-NW) Quadrangle, Tenn. 



(10) Pedicle interior, X 2, paratype, 116982a. 



Lincolnshire formation (Hogskin member), Evans Ferry section on U. S. 

 Highway 25E, £ mile north of Indian Creek, Howard Quarter (T.V.A. 

 162-NW) Quadrangle, Tenn. 

 (12) Brachial interior of a large specimen, showing small cardinalia, X I, 

 hypotype, 117988a; (13) same, X 2. 



Lincolnshire formation (Hogskin member), 2 miles southwest of Hall Cross- 

 road, in northwest $ of center subquad., Fountain City (T.V.A. 146-SW), Quad- 

 rangle, Tenn. 



B. Dinorthis virginiensis Cooper, new species 402 



(17) Pedicle exterior, X !, paratype, 116980b; (18) pedicle interior, X h paratype, 



116980a. 

 Edinburg formation (50 to 75 feet above the cherty beds of the Lincolnshire), 



quarry on the north side of U. S. Highway 33, 1 mile west of the junction with 



Virginia Highway 613, 4 miles west of Dale Enterprise, Harrisonburg (15') 



Quadrangle, Va. 

 (19-21) Respectively pedicle, brachial, and side views, X I, of the exfoliated 



holotype, 1 16979. 



Edinburg formation (500 to 600 feet above Lincolnshire), along Colliers 



Creek on Virginia Highway 251, i mile north of its junction with Virginia 



Highway 612, 6 miles west-southwest of Lexington, Rockbridge County, Va. 



Plate 60 

 multicostella 



A. Multicostella convexa Cooper, new species 418 



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

 specimen, X i> holotype, 110389a; (6-10) respectively pedicle, brachial, side, 

 anterior, and posterior views of another nearly perfect individual, X X, para- 

 type, 110386a; (11, 12) respectively Xi and X2 enlargements of the pedicle 

 interior, showing pallial trunks, paratype, 110380a; (13) another pedicle interior, 

 X if paratype, 110385b; (14) pedicle interior with less well developed pallial 

 trunks, X I, paratype, 110386b; (15) same, X 2, showing details of pallial marks 

 and muscle scars; (16) posterior half of the brachial interior showing accessory 

 ridges beside cardinal process, X 2, paratype, H038sd; (17, 18) respectively X 1 

 and X 2 enlargements of the brachial valve showing cardinalia and pallial trunks, 



