﻿PART II CHAZYAN AND RELATED BRACHIOPODS — COOPER IO67 



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 cardinalia, X 2, paratype, 110015I1; (7) pedicle exterior, X 2, paratype, nooisg; 

 (8) enlargement of exterior, X 4, paratype, 1100151. 



Chatham Hill formation, Virginia Highway 113 (Marion to Chatham Hill 

 road) 6 miles north of Marion, Chatham Hill (T.V.A. 218-NE) Quadrangle, 

 Va. 



B. Glyptorthis obesa Cooper, new species 372 



(9, 11) Exterior and side views, X 1, of the pedicle valve, holotype, uoo68d; 

 (10) brachial exterior, X 1, paratype, 110068c; (12) brachial interior, X 2, 

 paratype, 110068a. 



Bromide formation (Mountain Lake member), a little north of the middle 

 of sec. 32, T. 2 S., R. 2 E., 2 to 3 miles northeast of Springer, Carter County, 

 Okla. 



C. Glyptorthis uniplicata Cooper, new species 379 



(13) Pedicle exterior, X 2, paratype, 116947a; (14, 15) respectively X 1 and X2 

 enlargements of an imperfect brachial valve, paratype, 116947c; (16) pedicle ex- 

 terior, X 2, holotype, 116947b; (17) enlargement, X 3, of the ornamentation of 

 the holotype. 



Benbolt formation (basal part of Echinosphaerites bed directly overlying 

 the marble), \ mile east of Speers Ferry, Clinchport (T.V.A. 188-NW) Quad- 

 rangle, Va. 



D. Glyptorthis equiconvexa Cooper, new species 368 



(18-21) Respectively pedicle, posterior, side, and brachial views of a large com- 

 plete specimen, X 1, holotype, 116934b; (30) enlargement, X 2, of anterior of 

 holotype, showing ornamentation; (22-24) respectively brachial, pedicle, and 

 posterior views of an imperfect specimen preserving both valves in contact, X I, 

 paratype, 116934a; (25, 26) internal impression of the pedicle valve, X 1 and 



X 2, prepared by burning shell, paratype, 116934c; (28) plasticine replica of 

 the pedicle interior, X 2, prepared from preceding impression ; (27) brachial 

 internal impression, X 1, opposite side of paratype, 116934c; (29) plasticine 

 replica of brachial interior, X 2, prepared from preceding impression. 



Shippensburg formation (Pinesburg member — Echinosphaerites zone), west 

 bank of Conococheague Creek, road cut on U. S. Highway 40, at Wilson, 7 miles 

 west of Hagerstown, Md. 



Plate 48 

 Eridorthis, Glyptorthis 



A. Eridorthis inexpecta Cooper, new species 384 



(1) Pedicle exterior, X I, holotype, 110104a; (2, 3) side and exterior views of a 



large brachial valve, X I, paratype, 110106b; (4, 5) two smaller brachial valves, 



X if paratypes, noio6e, noio6d; (6) pedicle exterior, X if paratype, 110106c. 



Effna formation, Porterfield Quarry, 5 miles east of Saltville, Maccrady 



(T.V.A. 218-N W) Quadrangle, Va. 



B. Glyptorthis glypta Cooper, new species 369 



(7) Brachial exterior, X 2, holotype, 110067c; (8) pedicle interior showing nar- 

 row diductor scars, X 2, paratype, noo67f; (9, 10) posterior and exterior of a 

 pedicle valve, X 2, paratype, noo67e; (11) brachial interior, X 3, paratype, 

 1 ioo67d. 

 Effna-Rich Valley formations, locality same as above. 



C. Glyptorthis bellarugosa (Conrad) 363 



(12) Pedicle interior, X 2, paratype, A.M.N. H. (not numbered) ; (13, 14, 16-18) 

 respectively anterior, posterior, side, pedicle, and brachial views, X 2, of the 

 lectotype, A.M.N.H. 909/1 ; (15) lectotype, X 1. 



