﻿1206 SMITHSONIAN MISCELLANEOUS COLLECTIONS VOL. 127 



Plate 212 



BlMURIA, LEPTAENA 



Page 



A. Bimuria lamellosa ( Bassler ) 767 



(1) Brachial interior, X 2, paratype, 66i68d; (4, 10) posterior and normal views 

 of another brachial valve, X 3, showing septa and cardinalia, hypotype, 110948a; 

 (5, 8) pedicle and brachial views, X I, of the lectotype, 66168a; (6) brachial 

 view of another complete specimen, X I, hypotype, 110948b; (9) beak region 

 of the preceding, X 3» showing chilidium; (7) pedicle interior, X 3, showing 

 the foramen and teeth, hypotype, 110948c. 



Oranda formation, along the railroad i mile east of Strasburg Junction, 

 Strasburg (15') Quadrangle, Va. 



(2) Impression of the pedicle interior showing the pallial trunks, X 2, hypotype, 

 110949c; (3) impression of the brachial interior, showing slots representing the 

 septa, X 2, hypotype, 110949a. 



Oranda formation, 1 mile northwest of Guilford Springs, 2\ miles southwest 

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



B. Bimuria buttsi Cooper, new species 765 



(11) Pedicle interior showing pallial marks and pedicle foramen, X 2, paratype, 

 110933d; (13) posterior portion of the brachial valve, X 2, showing septa, para- 

 type, 110934c; (15) brachial interior, X 2, of a young specimen, paratype, 

 110933c; (17) pedicle interior, X 2, showing pallial marks, paratype, 110934b; 

 (26) exterior, X 1, of same specimen; (18) brachial interior, X 2, paratype, 

 110932c; (20) exterior of the pedicle valve, X I, showing lamellae, paratype, 

 110932a; {22, 23) brachial and pedicle views of a complete specimen showing 

 the great development of lamellae on the surface, X 1, holotype, 110934a; (27) 

 posterior of pedicle valve showing foramen and deltidium, X 4, paratype, 123264; 

 (29, 30) respectively X 1 and X 2 enlargements of an unusual pedicle valve 

 showing extravagant development of the lamellae, paratype, 110933c; (31) 

 anterior view of an adult specimen, X I, paratype, 110933a. 



Little Oak formation, intersection of Bailey Gap and main roads, S W|SWi 

 sec. 13, T. 19 S., R. 2 W., if miles northeast of Newhope Church, Vandiver 

 (15') Quadrangle, Ala. 



(12) Interior of the brachial valve of a young specimen, X 2, paratype, 110930a; 

 (14, 24) respectively X 1 and X 3 views, showing the pedicle foramen, deltidium, 

 chilidial plates, and cardinal process, paratype, 71506a; (16) brachial exterior of 

 a young specimen showing the exterior lamellae, X I, paratype, 110930b; (19) 

 brachial interior of a very young specimen, X 2, paratype, ii093od; (21, 28) 

 respectively X 1 and X 3 enlargements of the brachial view of a complete speci- 

 men, showing pedicle foramen, pseudodeltidium, chilidial plates, and cardinal 

 process, paratype, 110930c. 



Little Oak formation, \ mile north of Pelham, 660 feet east of intersection 

 Cahaba Valley and Helena roads, Bessemer Iron District (15') Quadrangle, 

 Ala. 

 (25) Interior of an adult brachial valve, X 2, paratype, 110935a. 



Little Oak formation, quarry north of Pelham, Bessemer Iron District (15') 

 Quadrangle, Ala. 



C. Leptaena ordovicica Cooper, new species 820 



(32) Exterior of a small brachial valve, X 2, paratype, 1 17665. This is the earliest 

 known true Leptaena yet found in North America. 



Edinburg formation (just above siltstone), on Hiatt Run, 200 yards east of 

 U. S. Highway II, 3 miles north of Winchester, Winchester (15') Quadrangle, 

 Va. 



