﻿PART II CHAZYAN AND RELATED BRACHIOPODS — COOPER 1127 



Page 

 showing apical structures, X 2, paratype, 663090!. The pedicle valve is the 

 lower one in the figure. • 



Boulder in Mystic conglomerate, Range 6, Lot 20, Stanbridge Township, near 

 Mystic, Quebec, Canada. 



C. Neostrophia ? sp. 1 59 1 



(17) Brachial valve, X 3, figured specimen, 117176b; (18) group of specimens, 

 X 3, figured specimen, 117176a. 



Ward Cove ? formation (basal part of 80-foot bed), Jeff Gillespie's place, 

 Thompson Valley, 14 miles southwest of Tazewell, Tazewell County, Pounding 

 Mill (15') Quadrangle, Va. 



D. Didymelasma longicrurum Cooper, new species 617 



(19-23) Respectively anterior, posterior, brachial, side, and pedicle views of a com- 

 plete specimen, X 3, holotype, 117158c; (24-26) respectively pedicle, side, and 

 brachial views of a complete specimen younger than the preceding, X 3. paratype, 

 ii7iS8d; (27) small slab showing group of valves, X T > paratype, 117158a; (28) 

 part of the preceding, X 3 ; (29) part of another slab surface, X 3, showing 

 brachial and pedicle interiors, paratype, 117158b. Note long parallel plates in the 

 brachial interiors. 



Lebanon formation, road cut on U. S. Highway 41, -f mile southeast of Knox 

 Branch, 9 miles southeast of Murfreesboro, Rutherford County, Tenn. 



E. Didymelasma abrnptum Cooper, new species 616 



(30) Exterior of the pedicle valve, X 2, paratype, Columbia Univ. 26403(928)3; 

 (31) brachial exterior, X 2, holotype, Columbia Univ. 26403 (928) b; (32) group 

 of immature valves not showing marked sulcus or fold, X 2, paratype, Columbia 

 Univ. 26403(928)0; (33) several valves on a small slab, X 3, paratype, 

 Columbia Univ. 26403 (928) c. 

 Rockland formation, northeast of Gretna, Ontario, Canada. 



Plate 121 



Camerella, Dalmanella, Hesperonomiella, Macrocoelia, Onychoplecia, 

 Parallelelasma, Triplesia 



A. Parallelelasma pentagomim Cooper, new species 614 



(1) Anterior view of a brachial valve showing the strainer "webs" between the 

 anterior costae, X 4, paratype, 111329. Same specimen as pi. 115, H, fig. 49. 



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

 rangle, Ala. 



B. Dalmanella crassicostellata Cooper, new species 949 



(2) Brachial view, X I, of the holotype, H736id; (3-7) respectively posterior, 

 anterior, pedicle, side, and brachial views, X 2, of the holotype; (8) interior of 

 the brachial valve, X 3, showing parallel plates and cardinal process, para- 

 type, 117361c 



Hermitage formation (base), on Tennessee Highway 53, 0.7 mile south of 

 Woodbury, Woodbury (15') Quadrangle, Tenn. 



C. Onychoplecia sp. 1 536 



(9, 10) Exterior and side views of an adult brachial valve showing distant costae, 

 X 2, figured specimen, 117096b; (11) exterior of a young pedicle valve, X 3, 

 figured specimen, 117096a; (12) plasticine replica of the exterior of an adult 

 pedicle valve, X 2, figured specimen, 117096c. 



Sevier formation (top sandstone No. 5), 0.28 mile northwest of Fourmile 

 Church, Tallassee (T.V.A. 139- SE) Quadrangle, Tenn. 



D. Triplesia sp. 1 539 



(13) Exterior of an imperfect pedicle valve, X 2, figured specimen, 1 17097. 



