﻿1 190 SMITHSONIAN MISCELLANEOUS COLLECTIONS VOL. I27 



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 Shippensburg formation (Pinesburg member — Echinosphaerites zone), on 

 U. S. Highway 40, on the west side of Conococheague Creek, 7 miles west of 

 Hagerstown, Williamsport (15') Quadrangle, Md. 



B. Bilobia virginiensis Cooper, new species 762 



(6-9) Pedicle, anterior, side, and brachial views, X 3, holotype, 117464a; (13) 

 brachial interior of an imperfect valve, X 3, paratype, 117464b; (14) interarea 

 of the preceding, X 5, showing chilidial plates and cardinal process; (15) an- 

 other brachial interior, X S» showing median ridge and disk, paratype, 117464c. 

 Edinburg formation (lower part of Nidulites zone), cut on U. S. Highway II, 

 100 yards south of entrance to Battlefield Crystal Caverns, Hupp Hill, 1 mile 

 north of Strasburg, Strasburg (15') Quadrangle, Va. 



(10-12) Interior, anterior, and side views of a nearly perfect brachial valve show- 

 ing the peculiar disk, X 3, paratype, 117466a. 



Edinburg formation (middle Nidulites zone), Tumbling Run i? miles south- 

 west of Strasburg, Strasburg (15') Quadrangle, Va. 



C. Bilobia hemisphaerica Cooper, new species 760 



(16-20) Respectively pedicle, side, posterior, anterior, and brachial views, X 2, of 

 a complete specimen, paratype, 117460b. 



Martinsburg formation (part with Brongniartella and referable to the Salona 

 formation), on Virginia County Highway 617 = 910, 0.15 mile north of Green 

 Mount Church, Broadway (15') Quadrangle, Va. 



D. Bilobia musca ( Opik) 761 



(21) Brachial view of a complete specimen, X 3, hypotype, 84258b; (22) pedicle 

 interior showing thickened muscle area, X 3, hypotype, 84258a; (23) brachial 

 interior, X 3, showing bilobed disk, and cardinalia, hypotype, 84258c ; (24) 

 posterior view of the preceding X 2, showing hypercline interarea, cardinal 

 process, and chilidial plates. 



Kuckers formation (C 3 a), Kohtla, Estonia. 



E. Eoplectodonta sp. 1 813 



(25) Plasticine replica of the brachial exterior, X 3, figured specimen, 117556; 

 (26) impression of the brachial interior, X 3, counterpart to mold from which 

 preceding figure was prepared ; (27) plasticine replica, X 3, of the brachial inte- 

 rior prepared from the preceding mold; (28) same as preceding, X 5, showing 

 hinge denticles. 



Edinburg formation (siltstone about 30 feet above Echinosphaerites zone), 

 ii miles south of Wadesville, Winchester (15') Quadrangle, Va. 



Plate 193 

 Anisopleurella, Bilobia 



A. Anisopleurella tricostellata Cooper, new species 806 



(1) Exterior of a young pedicle valve, X 4, paratype, H0925d; (2) another pedi- 

 cle exterior showing lateral wrinkles, X 4, paratype, 110925c ; (3) a third pedicle 

 exterior showing shell wrinkles, X 4, paratype, 110925a; (4) a well-preserved 

 pedicle exterior, X 4, paratype, 110925b. 



Pratt Ferry formation, 0.2 mile southeast of Pratt Ferry, Blocton (15') Quad- 

 rangle, Ala. 



B. Anisopleurella inaequistriata Cooper, new species 805 



(5) Large pedicle exterior, X 5, holotype, 110929a; (6, 7) two pedicle exteriors, 

 X 4, paratypes, 110929b, 110929c; (9) impression of the brachial interior pre- 

 pared by burning the shell, X 4, paratype, H0929d. 



Whitesburg formation (near top of middle third), ii miles west of Bulls Gap, 

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



