﻿1204 SMITHSONIAN MISCELLANEOUS COLLECTIONS VOL. I27 



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D. Goniotrema perplexum Ulrich and Cooper 711 



(14, 16) Interior and exterior of the pedicle valve, X 1, of the holotype, 92872; 

 (15, 17) exterior and interior of the brachial valve, X I, of the holotype; (18) 

 posterior view of the brachial valve of the holotype, X 2, showing cardinalia ; 

 (19) brachial valve of the holotype, X 2, interior; (20) pedicle interior of the 

 holotype, X 2, showing the elongate diductor scars; (21, 22) respectively Xi 

 and X 2 views of the apex of the holotype showing pedicle foramen. 



Upper Pogonip group, Ikes Canyon, east side of Toquima Range, Roberts 

 Mountains (l°) Quadrangle, Nev. 



Plate 210 



Bimuria, Christiania, Isophragma 



A. Bimuria parvula Cooper, new species 769 



(I) Pedicle exterior, X 2, holotype, H7469d; (2) brachial view, X 3, of the 

 holotype; (3) pedicle interior, X 2, paratype, 117469^ (4) brachial interior 

 showing septa, X 3, paratype, 1174696. 



Chatham Hill formation, 1.2 miles S. 31 E. of Sharon Springs, Burkes 

 Garden (15') Quadrangle, Va. 



B. Bimuria cf. B. supcrba Ulrich and Cooper 771 



(5) Pedicle view showing bundled lamellae on the outer surface, X I, figured 

 specimen, 110964a. 



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

 (T.V.A. 218-N W) Quadrangle, Va. 



C. Bimuria ? matutina Cooper, new species 768 



(6-8) Posterior, side, and exterior views of a pedicle valve, X 3, paratype, 66288a ; 

 (9) same, X 2; (10) another pedicle exterior, X 3. holotype, 66288b. 



Boulder in Mystic conglomerate, Range 6, Lot 20, near Mystic, Stanbridge 

 Township, Quebec, Canada. 



D. Christiania platys Cooper, new species 861 



(II) Brachial interior, X 2, paratype, 1 17574. 



Edinburg formation {Nidulites zone), 100 yards south of Battlefield Crystal 

 Caverns entrance on U. S. Highway II, Hupp Hill, 1 mile north of Strasburg, 

 Strasburg (15') Quadrangle, Va. 



E. Bimuria sp. I JJ2 



(13) Brachial view of an incomplete specimen, X 1, figured specimen, 117473; 

 (12, 14) pedicle and brachial views of the preceding specimen, X 2, showing 

 pedicle foramen. 



Dark shale under the Eureka quartzite, north-facing nose of hill 8167, Martins 

 Ridge, Monitor Range, Roberts Mountains (i°) Quadrangle, Nev. 



F. Bimuria superba Ulrich and Cooper 771 



(15, 16) Anterior and pedicle views of a pedicle valve showing good develop- 

 ment of the exterior lamellae, X I, hypotype, 117471. 



Arline formation (top), small quarry on east side of Tennessee Highway 66A, 

 i mile northeast of St. Clair, Bulls Gap (T.V.A. 171-SE) Quadrangle, Tenn. 



G. Bimuria siphonata Cooper, new species 770 



(17, 21, 22) Brachial, anterior, and posterior views of a young complete speci- 

 men, X 5, showing the pedicle siphon, holotype, 117470a; (18) brachial view of 

 the preceding enlarged X 8 to show the pedicle siphon, pseudodeltidium, and 

 chilidial plates; (19, 20) pedicle and side views of a somewhat larger specimen 

 than the preceding, X 5. paratype, ii747od; (23, 24) two views of the same 

 brachial valve showing the cardinalia, septa, and serrated lateral lobes, X 5, 

 paratype, 117470c 



