﻿1220 SMITHSONIAN MISCELLANEOUS COLLECTIONS VOL. 127 



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 (27, 28) interiors of two brachial valves, X 2, showing the cardinalia, pallial 

 marks, and subperipheral rim, paratypes, 117636c, 11 76361. 



Dryden formation, on the road to Tazewell, i£ miles northeast of Lone 

 Mountain, Tazewell (T.V.A. 154-NE) Quadrangle, Tenn. 

 (14, 15) Exterior and interior of a small pedicle valve, X 1, paratype, 117637a; 

 (21, 22) exterior and interior of brachial valve, X I, paratype, 117637b; (23) 

 same brachial interior, X 2. 



Dryden formation (Wardell part), 1 mile west of Lone Mountain, Tazewell 

 (T.V.A. 154-NE) Quadrangle, Tenn. 

 (17-19) Exterior, posterior, and interior of brachial valve, X 2, showing cardinalia 

 and septa, paratype, 117632a; (20) interior, X *, of the same specimen; (26) 

 another brachial interior, X 1, paratype, 1 17633. 



Poteet formation (9-foot marble band = Yellow Branch member), on the road 

 beside Yellow Branch, 5 miles southeast of Rose Hill, Rose Hill (T.V.A. 

 161-NE) Quadrangle, Va. 

 (25) Interior of a large brachial valve showing strong subperipheral rim, X I, 

 paratype, 117635c. 



Wardell formation, Raccoon Valley, | mile northeast of Fleanor Mill, Powell 

 Station (T.V.A. 137-SE) Quadrangle, Tenn. 



Plate 227 



murinella 



A. Murinella semireducta Cooper, new species 849 



(1) Brachial view of the complete specimen before dissolving out the matrix with 

 acid, X I, holotype, 117645; (2) interior of the posterior part of the brachial 

 valve of the preceding specimen, X 2, showing the muscle scars ; (3, 4) respec- 

 tively X 1 and X 2 enlargements of the brachial interior of the same specimen, 

 showing subperipheral rim and cardinalia; (5) posterior of the preceding valve, 

 X 2, showing the prongs of the cardinal process. 



Lincolnshire formation (Hogskin member), Sally Cleveland Farm, ^ mile 

 southwest of Washburn, Dutch Valley (T.V.A. 154-SE) Quadrangle, Tenn. 



B. Murinella plana Cooper, new species 849 



(6, 7) Posterior and brachial views of a complete specimen, X 2, holotype, 117644a. 

 Lincolnshire formation (Hogskin member), Evans Ferry, about 1 mile north 

 of Indian Creek, on U. S. Highway 25E, Howard Quarter (T.V.A. 162-NE) 

 Quadrangle, Tenn. 



C. Murinella biconvexa Cooper, new species 845 



(8, 9) Brachial and pedicle views, X 1, holotype, 117629a; (10-13) respectively 

 pedicle, posterior, brachial, and side views, X 2, of the holotype; (14) brachial 

 view of another complete specimen, X 2, paratype, 1 17630; (15, 16) pedicle and 

 brachial views, X l> of another paratype, 117629b. 

 Horizon and locality same as A above. 



D. Murinella partita Cooper, new species 847 



(17) Exterior of the brachial valve, X 1, part of paratype, 117638; (18, 21) ex- 

 terior and interior of the brachial valve, X h part of same paratype; (19, 20) 

 exterior and interior of the brachial valve, X 2, showing ridges and cardinalia ; 

 (22) posterior of the brachial valve showing the cardinal process, X 2 ; (23, 24) 

 exterior and interior of the pedicle valve, X 2, showing the muscle area and 

 median ridge; (25) posterior of the pedicle valve showing foramen and pseudo- 

 deltidium, X 2— all of paratype, 1 17638. 



Bromide formation (Mountain Lake member — reef limestone), road cut, east 



