﻿PART II CHAZYAN AND RELATED BRACHIOPODS — COOPER 1120, 



Page 



C. Plectocamara aseptata Cooper, new species 597 



(22-26) Respectively anterior, posterior, side, brachial, and pedicle views of a fine, 

 complete specimen, X 3, holotype, 111361a. 



Benbolt formation (15 feet above the base), \\ miles west of Rye Cove, 

 Clinchport (T.V.A. 188-NW) Quadrangle, Va. 



D. Plectocamara aseptata Cooper, new species 597 



(27-29) Respectively pedicle, side, and brachial views of a young specimen, X 3, 

 para type, 117 181. 



Ward Cove formation, 2 miles southwest of Hall Crossroad, Fountain City 

 (T.V.A. 146-SW) Quadrangle, Tenn. 



E. Plectocamara rotunda Cooper, new species 600 



(3 -34) Respectively brachial, anterior, side, posterior, and pedicle views of a 

 complete specimen, X 3, paratype, 117186c 



Chatham Hill formation, 1.2 miles S. 31° E. of Sharon Springs, Burkes 

 Garden (15') Quadrangle, Va. 



F. Plectocamara transversa Cooper, new species 602 



(35) Pedicle exterior, X I, holotype, 117188; (36, 37) pedicle exterior and inte- 

 rior, X 2, showing spondylium and extremely abbreviated median septum, 

 holotype. 



Edinburg formation (lower Nidulites zone), 100 yards south of Battlefield 

 Crystal Caverns entrance on U. S. Highway it, I mile north of Strasburg, 

 Strasburg (15') Quadrangle, Va. 



G. Plectocamara magna Cooper, new species 600 



(38-42) Respectively pedicle, anterior, posterior, brachial, and side views, X I, of 

 the holotype, 117185a; (43-47) respectively posterior, anterior, brachial, side, 

 and pedicle views, X 2, of the holotype ; (48, 49) pedicle and brachial views of 

 an impression of the interior prepared by burning the shell and scraping it away 

 from a complete specimen, X 2, paratype, 117185b; (50) posterior of the pre- 

 ceding interior impression, X 3, showing slots of the spondylium; (51) plasticine 

 replica of the posterior internal structures, X 3, showing cruralium with only 

 vestige of the median septum, prepared from the preceding. 



Shippensburg formation (Pinesburg member — lower part of cobbly Echino- 

 sphaerites zone), on U. S. Highway 40, on the west side of Conococheague 

 Creek, 7 miles west of Hagerstown, Williamsport (15') Quadrangle, Md. 



Plate 123 

 Plectocamara 



A. Plectocamara sulcata Cooper, new species 601 



(1) Brachial view of a complete specimen, X I, holotype, 117187; (2, 3, 4-6) 

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

 preceding specimen. 



Benbolt formation, south side of Mount Hagan School, Hilton (T.V.A. 

 197-NW) Quadrangle, Va. 



B. Plectocamara cf . P. aseptata Cooper, new species 597 



(7-1 1 ) Respectively pedicle, posterior, side, anterior, and brachial views of a 

 pauciplicate specimen, X 3, figured specimen, 117180a. 



Sevier formation (near base), $ mile northeast of Miser, Louisville (T.V.A. 

 138-SE) Quadrangle, Tenn. 



C. Plectocamara aseptata Cooper, new species 597 



(12-16) Respectively pedicle, anterior, side, posterior, and brachial views of a 

 complete specimen, X 3, paratype, 117180b. 

 Horizon and locality same as preceding. 



