﻿1 1 12 SMITHSONIAN MISCELLANEOUS COLLECTIONS VOL. I27 



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C. Oxoplecia pennsylvanica Cooper, new species 553 



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

 plete specimen, X 1, holotype, 117119a; (17, 18) pedicle and brachial views, X 2, 

 of the holotype; (19) posterior part of the holotype, X 3, showing interarea and 

 pseudodeltidium. 



Salona formation, old quarry 1 mile north-northeast of Bellefonte, Bellefonte 

 (15') Quadrangle, Pa. 



D. Oxoplecia plamdata Cooper, new species 554 



(20-23) Respectively anterior, brachial, side, and pedicle views of a complete speci- 

 men, X 1, holotype, 117122; (24) posterior of preceding, X 2, showing interarea 



and pseudodeltidium. 



Carters formation {Oxoplecia bed), quarry 0.3 mile north of Gate City, Leeds 

 (15') Quadrangle, Ala. 



E. Oxoplecia plicata Cooper, new species 555 



(25) Brachial exterior, X 1, holotype, 117123; (26-31) respectively pedicle, poste- 

 rior, anterior, side, tilted to show interarea and pseudodeltidium and brachial 

 views, X 2, of the holotype. 



Red Knobs formation, f mile east of Friendsviile, Louisville (T.V.A. 138-SE) 

 Quadrangle, Tenn. 



F. Oxoplecia eidsonensis Cooper, new species 541 



(32-36) Respectively anterior, brachial, posterior, side, and pedicle views, X i, of 

 the holotype, 110847b; (37, 38) posterior and brachial views, X 2, of the 

 holotype. 



Lincolnshire formation (shaly part), on old pasture road, \ mile north of 

 Eidson, Kyles Ford (T.V.A. 170-SE) Quadrangle, Tenn. 



G. Oxoplecia abnormis Cooper, new species 539 



(39) Brachial view, X 1, of the holotype, 1 10842; (40-44) respectively posterior, 

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



Effna formation, 1 mile east of Tilson Mill, 16 miles northeast of Marion, 

 Nebo (T.V.A. 223-NW) Quadrangle, Va. 



Plate 105 

 Oxoplecia 



A. Oxoplecia multicostellata Cooper, new species 549 



(1-5) Respectively pedicle, anterior, brachial, posterior, and side views of a silicified 

 specimen, X I, paratype, 111791a; (15) posterior of the pedicle valve showing 

 interarea, teeth, and pseudodeltidium, X 2, paratype, ni79if; (21, 22) interior 

 and posterior of the brachial valve, X 3, showing brachial processes and cardinal 

 process, paratype, 111791c; (20) pedicle interarea, X 3, showing teeth, pseudo- 

 deltidium, and small elevated ridge on the pseudodeltidium, paratype, iH79id. 

 Note part of pseudodeltidium laid down anterior to the anterior end of the 

 elevated ridge. 



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

 Garden (15') Quadrangle, Va. 

 (6-9) Respectively side, posterior, pedicle, and brachial views of a complete speci- 

 men, X I, holotype, 11 1790; (27) right umbonal side and lateral slope of brachial 

 valve of holotype, enlarged X 4 to show filose ornament. 



Benbolt formation (lower), 0.2 mile south of the middle fork of Moccasin 

 Creek, i\ miles south of Hansonville, Hansonville (T.V.A. 205-SW) Quad- 

 rangle, Va. 

 (10-13) Respectively anterior, pedicle, side, and brachial views of a large speci- 

 men, X i| paratype, 117114a. 



