﻿PART II CHAZYAN AND RELATED BRACHIOPODS — COOPER 121 5 



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 Lincolnshire formation (Hogskin member), 0.4 mile east-northeast of Red 

 Hill, 4 miles west-southwest of Thorn Hill, Avondale (T.V.A. 162-SW) Quad- 

 rangle, Tenn. 



D. Limbimurina insueta Cooper, new species 853 



(18, 21) Respectively X 1 and X2 enlargements of a pedicle exterior, showing 

 the extravagant frill, holotype, 117659a; (19, 22) respectively X' and X2 en- 

 largements of another pedicle exterior, paratype, 117659b; (20, 23) respectively 

 X 1 and X 2 enlargements of the brachial exterior showing the large frill, 

 paratype, 117659c. 



Rodman member of Nealmont formation, old road north of Roaring Spring, 

 Hollidaysburg (15') Quadrangle, Pa. 



Plate 221 

 Bellimurina, Christiania, Laticrura, Limbimurina, Petroria, Phragmorthis 



A. Laticrura heteropleura Cooper, new species 980 



(1) Brachial view of a perfect specimen, X 1, holotype, 117263a; (2-6) respec- 

 tively posterior, anterior, pedicle, side, and posterior views, X 2, of the holotype. 

 Little Oak formation, junction of Bailey Gap and Cahaba Valley roads, 

 SW^SWi sec. 13, T. 19 S., R. 2 W., if miles northeast of Newhope Church, 

 Vandiver (15') Quadrangle, Ala. 



B. Christiania subquadrata (Hall) (immature) 862 



(7-9) Respectively posterior, pedicle, and brachial views of a small complete 

 specimen, X 4, showing apical foramen and small pedicle tube, hypotype, 

 123266a; (10) fragment of pedicle valve showing teeth and muscle scars, X 4, 

 hypotype, 123266b; (11) another pedicle interior showing narrow pseudo- 

 deltidium, X 4, hypotype, 123266c; (12) well-preserved pedicle interior showing 

 interarea, X 4, hypotype, 1232666.; (13-15) interiors of three brachial valves 

 showing ridges and small bilobed cardinal process, X 4, respectively, hypotypes, 

 I23266e-g. 



Pratt Ferry formation, 0.2 mile southeast of Pratt Ferry, Blocton (15') Quad- 

 rangle, Ala. 



C. Phragmorthis buttsi Cooper, new species 510 



(16-20) Respectively anterior, posterior, brachial, pedicle, and side views of a com- 

 plete adult, X 3, paratype, 116960c; (21, 22) brachial and anterior views of a 

 young specimen, X 2, paratype, 116960k. 

 Horizon and locality same as preceding. 



D. Bellimurina compressa Cooper, new species 855 



(23) Brachial view, X 1, of the holotype, 117653; (24-28) respectively posterior, 

 anterior, side, brachial, and pedicle views, X 2, of the holotype. 



Bromide formation (Mountain Lake member), east side of cut on Oklahoma 

 Highway 18, 1.8 miles south of Sulphur, Murray County, Okla. 



E. Petroria rugosa Wilson 746 



(29, 30) Interior of the pedicle valve, tilted and in normal view, showing the long, 

 thick vascula media, X 2, cotype, G.S.C. 6754a ; (31, 32) brachial interior, X 2, 

 in normal view and tilted to show the median septum and muscle scars, counter- 

 part to the preceding pedicle valve; (33) the same valve, X 3, showing median 

 septum and cardinalia; (34) same, X 3, tilted to show brachial processes; (35) 

 posterior of the preceding, X 3, showing the chilidial plates, sockets, and short 

 brachial processes; (36) the same valve, X 3, seen in side view. Note absence 

 of cardinal process. 



Beaverfoot formation, Palliser Pass, British Columbia, Canada. 



