﻿1212 SMITHSONIAN MISCELLANEOUS COLLECTIONS VOL. I27 



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I. Dactylogonia sp. 5 838 



(23-26) Respectively pedicle, posterior, anterior, and side views of a complete 

 specimen, X 2, figured specimen, 11 76 10. 



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

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



J. Dactylogonia subaequicostellata Cooper, new species 836 



(27, 28) Pedicle and brachial views of a complete specimen, X 1, paratype, 1 17603. 



Bromide formation (Mountain Lake member), between Sylvan and Mill 



Creeks, on the west branch of Sycamore Creek, sec. 27, T. 3 S., R. 4 E., Carter 



County, Okla. 



(29-31) Pedicle, side, and brachial views of another complete specimen, X 1, 



paratype, 117601b. 



Bromide formation (Mountain Lake member), McLish Ranch, sec. 24, T. 1 S., 

 R. 7 E., Johnston County, Okla. 



K. Dactylogonia obsoleta (Butts) 831 



(3 2 -34) Pedicle, side, and brachial views of a large specimen, X 1, holotype, 71505. 

 Little Oak formation, 600 feet east of intersection of Cahaba Valley and 

 Helena roads, \ mile north of Pelham, Bessemer Iron District (15') Quadrangle, 

 Ala. 



L. Dactylogonia obtusa Cooper, new species 832 



(35-37) Pedicle, side, and brachial views of a complete specimen, X 1, paratype, 

 1 17596. 



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

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



M. Dactylogonia genicnlata Ulrich and Cooper 827 



(38, 39) Pedicle and brachial views of an imperfect specimen, X 2, hypotype, 

 117588a. 



Little Oak formation, junction of Bailey Gap and main roads, if miles north- 

 east of Newhope Church, Cahaba Valley, SWiSW^ sec. 13, T. 19 S., R. 2 W., 

 Vandiver (15') Quadrangle, Ala. 



Plate 218 

 Dactylogonia, Rhipidomena 



A. Dactylogonia parva Cooper, new species 834 



(1-3) Anterior, side, and exterior view of a pedicle valve, X 3, holotype, 117597a. 

 Lincolnshire formation (Hogskin member — Oligorhynchia bed), 0.4 mile east- 

 northeast of Red Hill, 4 miles west-southwest of Thorn Hill, Avondale (T.V.A. 

 162-SW) Quadrangle, Tenn. 



B. Dactylogonia geniculata Ulrich and Cooper 827 



(4-6) Brachial, brachial tilted to show interarea, and pedicle views of a complete 

 specimen, X 2, hypotype, 117586a; (7) brachial view, X I, of same specimen as 

 preceding. 



Arline formation (middle), north side of wagon road in glade, \ mile south- 

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



C. Rhipidomena mesleri Cooper, new species 868 



(8, 9) Pedicle and brachial views of a complete specimen, X 2, paratype, 117674a; 

 (10) brachial view, X 1, of the same specimen. 

 Horizon and locality same as A above. 



D. Dactylogonia altemata Cooper, new species 825 



(11, 12) Respectively X 1 and X 2 enlargements of the pedicle exterior, paratype, 

 117582a; (13, 14) respectively X 1 and X 2 enlargements of the exterior of the 

 brachial valve, paratype, 117582b. 



