﻿PART II 



CHAZYAN AND RELATED BRACHIOPODS— COOPER 1207 



Plate 213 

 Craspedelia, Hesperinia, Isophragma, Ptychoglyptus, Rhipidomena, Strophomena 



Page 



A Craspedelia marginata Cooper, new species • • • • • ■ • ' 773 



(1-4) Respectively exterior, posterior, anterior, and interior views of the pedicle 

 valve X4 showing pedicle siphon and deflected anterior flanges, paratype, 

 117474a- (5, 6, 8, 10) respectively exterior, anterior, interior, and posterior views 

 of another pedicle valve, X 3, holotype, n7474b; (7, 9) anterior and interior 

 views of the preceding specimen, X 6, showing pedicle siphon in both views; 

 (11-13) anterior, tilted, and normal views of a brachial valve showing the car- 

 dinalia and septum, X 4, paratype, n 7 474c; (14, IS) two views of another, 

 old-age brachial valve showing the cardinalia and ridges, X 6, paratype, 

 ii7474d- (16) the brachial interior showing the deflected flange, X 4, paratype, 

 ii 74 74e- (17) the preceding brachial interior, X 5, tilted to show the flange; 

 (18) exterior view of the preceding specimen, X 5, with complete outline 

 restored; (19) exterior showing the hypercline interarea, X 6, paratype, 1 17474* ; 

 (20) chilidial structures, ca. X 10, of the preceding specimen. 



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

 rangle, Ala. 74Q 

 B. Isophragma sp. 1 '."','. ,' ,'• + 1 



(21) Interior of a small brachial valve showing cardinalia and median septal 



plates, X 3, figured specimen, 123286. 

 Horizon and locality same as preceding. 

 C Ptychoglyptus pulchrns Butts = P. virginiensis Willard 8l ° 



(22) Exterior view of a well-preserved pedicle valve, X 3, hypotype, 123285^ 

 Horizon and locality same as preceding. 



D. Rhipidomena sp. 1 ; ] ', "'"','.'" 



(23, 24) Brachial and pedicle views of an incomplete specimen with outlines 

 restored, X I, figured specimen, 117699a. 



Arline formation, north side of the wagon road through glade, { mile south- 

 east of Friendsville, Concord (T.V.A. 138-SW) Quadrangle, Tenn. 



822 



E. Hesperinia kirki Cooper, new species 



(25) Pedicle interior, X 2, showing the cardinalia, paratype, 1 17625. 

 Upper Pogonip group, White Pine Range, White Pine County, Nev. 



F. Strophomena cf. S. inspeciosa Willard _ ■*• 939 



(26-30) Respectively posterior, anterior, pedicle, side, and brachial views of a 

 complete specimen, X 1, hypotype, 117728a; (31-34) respectively brachial, side, 

 anterior, and posterior views of a specimen slightly larger than the preceding, 

 X I, hypotype, 117728b. 



Wardell formation (Hesperorthis zone), cut on U. S. Highway 25E, Evans 

 Ferry, \ mile north of Indian Creek, Howard Quarter (T.V.A. 162-NW) Quad- 

 rangle, Tenn. 



G. Strophomena inspeciosa Willard • • • 939 



(35-38) Respectively side, anterior, brachial, and pedicle views of a complete 

 specimen, X 2, hypotype, 1 17725- 

 Wardell formation (between Hesperorthis and Soiverbyella beds), same 



locality as preceding. 



Plate 214 

 Christiania 



A. Christiania trentonensis Ruedemann • <•■••• 5 



(1) Plaster replica of the brachial interior, X 2, cotype, New York State Mus. ; 



