﻿II08 SMITHSONIAN MISCELLANEOUS COLLECTIONS VOL. 127 



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 stone), southeast side of the Friends Church, north corner of Friendsville, 

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



Plate 100 

 Onychoplecia, Oxoplecia, Triplesia 



A. Onychoplecia longirostris (Billings) 533 



(1-3) Respectively side, brachial, and pedicle views, X 2, of the holotype, G.S.C. 



1039. 

 Mingan formation, Mingan Islands, St. Lawrence River, Canada. 



B. Onychoplecia kindlei Cooper, new species 532 



(4-7) Respectively side, pedicle, anterior, and brachial views of a perfect speci- 

 men, X 4, holotype, 117092a; (8, 10) exterior and anterior views of a brachial 

 valve, X 4, paratype, 117092b; (9) exterior of a pedicle valve showing the deep 

 sulcus, X 4, paratype, ii7092d. 



Table Head series, Table Point Cove, Newfoundland. 



C. Onychoplecia gracilis (Raymond) 531 



(11-13) Respectively anterior, side, and pedicle views, of an unusually perfect 

 specimen, X 3, hypotype, Carnegie Mus. 5457 ; ( 14) brachial view of the preced- 

 ing, X 4, showing pseudodeltidium. 



Crown Point formation, Valcour Island, Lake Champlain, Plattsburg (15') 

 Quadrangle, N. Y. 



D. Onychoplecia brevirostris Cooper, new species 53° 



(15, 16) Anterior and brachial views of a large specimen, X 2, paratype, 117089c; 

 (17) pedicle view of another large specimen, X 2, paratype, 117089b; (19) bra- 

 chial view of another small specimen, X I, paratype, H7o89d; (18) brachial 

 view of a small specimen preserving the beak, X I, paratype, 117089c; (20-22) 

 respectively pedicle, side, and brachial views, X 3, of the preceding. 



Lenoir formation (calcarenite below the Mosheim limestone), southwest side 

 of the cemetery behind the Friends Church, north corner of Friendsville, Con- 

 cord (T.V.A. 138-SW) Quadrangle, Tenn. 



E. Onychoplecia obesa Cooper, new species 534 



(23, 25) Brachial and side views of a large brachial valve, X 2, holotype, 117090b ; 

 (24) brachial view, X l, of the preceding; (26, 27) respectively X 1 and X2 

 enlargements of the pedicle valve showing the long beak, paratype, 117090a. 



Row Park formation, (Maclurites bed 175 feet above the "Mosheim" lime- 

 stone), i to i mile east-northeast of the railroad cut on creek, 2^ miles south- 

 west of Marion, Chambersburg (15') Quadrangle, Pa. 



F. Onychoplecia cf. O. brevirostris Cooper, new species 530 



(28) Exterior of the pedicle valve, X 2, figured specimen, 118009a; (29) exterior 

 of the brachial valve, X 2, figured specimen, 118009b. 



Lenoir formation (3 feet above the Mosheim limestone), west of the railroad 

 station and just south of Friends Church, Friendsville, Concord (T.V.A. 

 138-SW) Quadrangle, Tenn. 



G. Oxoplecia hoist onensis Willard 545 



(30-34) Respectively anterior, posterior, side, brachial, and pedicle views of a com- 

 plete but decorticated specimen, X 1, hypotype, 117106b. 



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

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



H. Triplesia snbearinata Cooper, new species 538 



(35-37) Respectively posterior, side, and exterior views of a brachial valve, X 2, 

 paratype, 117094b; (38-40) respectively exterior, side, and anterior views of the 

 pedicle valve, X 2, holotype, 117094a. 

 Lebanon formation, Columbia, Maury County, Tenn. 



