﻿IO38 SMITHSONIAN MISCELLANEOUS COLLECTIONS VOL. 127 



Page 

 Arline formation, north side of wagon road in glade, \ mile southeast of 

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



B. Conotreta cuspidata Cooper, new species 250 



(4, 5, 7) Respectively anterior, side, and posterior views of the pedicle valve, X 4, 

 holotype, 109716a; (6) imperfect brachial valve, X 4, paratype, 109716b. 



Effna formation, Porterfield Quarry, 5 miles due east of Saltville, Maccrady 

 (T.V.A. 218-NW) Quadrangle, Va. 



C. Spondylotreta t declivis ( Willard) 256 



(8-10) Apical, side, and posterior views of the pedicle valve, X 4, hypotype, 

 109727a. 



Effna formation, McNutt Quarry, 12 miles southwest of Bland, Burkes Gar- 

 den (15') Quadrangle, Va. 



D. Conotreta magna Cooper, new species 252 



(11, 14) Side and posterior views of a large pedicle valve, X 2, paratype, 109732b; 

 (15) side view of same, X 1, posed with apex vertical; (16) brachial valve, X 3, 

 paratype, 109732a. 



Whitesburg formation (cobbly Ampyx and Isotelns beds o to 50 feet above the 

 Lenoir), on Morristown road, U. S. Highway 11, \\ miles west of Bulls Gap, 

 Bulls Gap (T.V.A. 171-SE) Quadrangle, Tenn. 

 (12, 13, 17) Side, anterior, and posterior views of a larger pedicle valve, X 2, 

 holotype, 109733. 



Whitesburg formation (lower 50 feet), 2 miles southwest of Bulls Gap, Bulls 

 Gap (T.V.A. 171-SE) Quadrangle, Tenn. 



E. Conotreta gigantea Cooper, new species 251 



(18) Apical view of an exfoliated specimen showing foramen and pallial trunks, 

 X 3, paratype, 109734c; (19, 21-23) posterior, apical, side, and anterior views of 

 a well-preserved pedicle valve, X 3, holotype, 109734b; (20) partial impression 

 of a brachial interior showing the median ridge, X 3, paratype, 109734c. 



Pratt Ferry formation (lower 3 feet), 0.2 mile southeast of Pratt Ferry, 

 Blocton (15') Quadrangle, Ala. 



F. Conotreta plana Cooper, new species 254 



(24-27) Posterior, apical, anterior, and side views of a nearly perfect pedicle 

 valve, X 4, holotype, 109735b. 



Effna formation, Porterfield Quarry, 5 miles due east of Saltville, Maccrady 

 (T.V.A. 218-NW) Quadrangle, Va. 



G. Conotreta midtisimiata Cooper, new species 253 



( 2 9, 30, 35) Posterior, side, and anterior views of a pedicle valve, X 6, paratype, 

 I09742f; (31) brachial interior impression, X 6, paratype, 109742P; (36) apical 

 view of an exfoliated pedicle valve showing foramen cast and impressions of pal- 

 lial trunks, X 6, paratype, 109742I1; (40) apical part of pedicle interior, X 6, 

 paratype, i09742r. 



Chatham Hill formation, Grayson Farm, 4 miles southwest of Bland, Va. 



(3 2 -34) Apical, anterior, and side views of an exfoliated pedicle valve showing 

 pallial trunks, X 6, paratype, 109739a. 



Botetourt formation, 2 miles south of Albany, Mosheim (T.V.A. 181-NW) 

 Quadrangle, Tenn. 



(28) Apical view of a silicified specimen showing the tiny apical foramen, X 8, 

 paratype, 109746b; (37) pedicle interior showing preforaminal callosity and pal- 

 lial trunks, X 8, holotype, 109746a; (38, 39) brachial interiors, X 10, paratypes, 

 109746c, d. Specimen shown in fig. 38 is tipped slightly to the observer's right 

 to show the apex of the median septum. 



Edinburg formation (lower Liberty Hall facies), field northwest of U. S. 



