﻿PART II CHAZYAN AND RELATED BRACHIOPODS — COOPER IO49 



Page 

 rior views of another specimen showing surface ornament of the host Stropho- 

 mena crinerensis reflected on the exterior, X 2, paratype, 109785c 

 Horizon and locality same as preceding. 



Plate 26 

 acanthocrania, petrocrania, philhedra 



A. Acanthocrania grandis Cooper, new species 284 



(1) Brachial valve, X I, holotype, 116838; (2, 3) exterior and side views, X 2, 

 of the holotype, showing spiny ornamentation. 



Base of Benbolt formation, west slope of hill •£ mile east of Cedar Point 

 School, Hilton (T.V.A. 197-NW) Quadrangle, Va. 



B. Philhedra deprcssa Cooper, new species 291 



(4. S) Side and exterior views of the brachial valve, X 2, holotype, 109749. 



Prosser formation, 25 feet above base of Duck Creek Quarry, near Green Bay, 

 Wis. 



C. Philhedra ferruginea Cooper, new species 291 



(6) Apical view, X 2, of the brachial valve, holotype, 109750; (7, 8) side and 

 apical views, X 2, of the holotype. 



Red Knobs formation, 7 miles northeast of Charleston, Calhoun (T.V.A. 

 125-SW) Quadrangle, Tenn. 



D. Acanthocrania cumberlandensis (Foerste) 284 



(9, 10) Exterior and side views of the brachial valve, X 2, lectotype, 87157a; 

 (11) brachial interior, X 2, paratype, 87157b. 

 Wells formation, $ mile southwest of Cumberland City, Stewart County, Tenn. 



E. Philhedra minor Cooper, new species 292 



(12, 13) Apical and side views, X 2, of the holotype, 109760. 



Pierce formation, Pierce Mill, Walterhill, 7^ miles north of Murfreesboro, 

 Tenn. 



F. Petrocrania inftata Cooper, new species 288 



(14, 15) Side and apical views of the brachial valve, X 2, paratype, 109758. 



Bromide formation (Pooleville member — 183 feet below massive limestone), 

 second dam on Spring Creek, north of Woodford, Murray County, Okla. 



G. Acanthocrania erecta Cooper, new species 284 



(16, 17) Apical and side views, X 2, of the holotype, 109789. 



Bromide formation (Mountain Lake member ?), NWi sec. 27, T. 1 S., 

 R. 2 E., half way between Dougherty and Davis, Murray County, Okla. 



H. Acanthocrania spinosa Cooper, new species 285 



(18, 19) Interior and exterior of the brachial valve, X 4, holotype, 109795. 



Edinburg formation (Liberty Hall facies), 1.8 miles S. 4 W. of Bethel 

 Church, 5.9 miles due east of Harrisonburg, Harrisonburg (15') Quadrangle, 

 Va. 



I. Acanthocrania snbquadrata Cooper, new species 286 



(20, 21) Cluster of specimens covering brachial interior of Opikina, X I and X 3, 

 paratype, 109793; (22, 25) apical and side views, X 2, of the holotype, 109759b; 

 (23) interior of an imperfect brachial valve, X 2, paratype, I09759d; (24) apical 

 view, X 3, of a specimen showing ornamentation of its host Doleroides impressed 

 on brachial surface, paratype, 109759c. 



Bromide formation (Upper Mountain Lake member), road cut on east side 

 of Oklahoma Highway 18, 1.8 miles south of Sulphur, sec. II, T. I S., R. 3 E., 

 Murray County, Okla. 



