﻿Il66 SMITHSONIAN MISCELLANEOUS COLLECTIONS VOL. I27 



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 (36) Brachial interior, X 3, showing swelling on brachiophores and the suture be- 

 tween, hypotype, 123238a; (37) pedicle interior, X 2, showing elongate adductor 

 scars, and fossettes in teeth, hypotype, 123238b. 



Curdsville formation, \ mile north of Sill, lat. 36°i7'3i", long. 83°53'55", 

 White Hollow (T.V.A. 145-SW) Quadrangle, Tenn. 



Plate 160 

 Cristiferina, Eremotrema, Paucicrura 



A. Paucicrura virginica Cooper, new species 958 



(1, 2) Pedicle and brachial views of a complete specimen, X 2, paratype, 117367a. 



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

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

 (3-5) Side, pedicle, and brachial views, X 2, of a specimen more robust than shown 

 in figs. 1 and 2, holotype, 117368b; (6) pedicle interior, X 3, paratype, 117368c; 

 (7) brachial interior, X 3, showing brachiophores with some thickening of shell 

 tissue to support them, paratype, H7368f; (8) brachial interior of a speci- 

 men larger than the preceding but with little supporting tissue on the brachio- 

 phores, X 3, paratype, U7368d; (9) brachial interior still larger than the pre- 

 ceding showing some thickening supporting the brachiophores, X 3, paratype, 

 117368c; (10) another brachial interior, X 3, paratype, H7368g. 



Edinburg formation (lower to middle Nidulites zone), cut on U. S. High- 

 way 11, 100 yards south of Battlefield Crystal Caverns entrance, Hupp Hill, 

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



B. Cristiferina cristifera Cooper, new species 963 



(11-14) Respectively posterior, side, anterior, and brachial views, X 2, of the 

 holotype, 117356a; (15) brachial view, X I, of the holotype. 



Oranda formation, north fork of the Shenandoah River N. 61 ° E. of Edin- 

 burg, Edinburg (15') Quadrangle, Va. 



C. Cristiferina cristata Cooper, new species 962 



(16) Brachial view of a complete specimen, X I, holotype, ni794g; (17-21) 

 respectively brachial, pedicle, posterior, anterior, and side views, X 2, of the 

 holotype; (24, 25) respectively X 1 and X 2 enlargements of the pedicle interior, 

 paratype, 111794c; (27) brachial interior, X 2, showing elongate ridge on the 

 myophore, paratype, ni794d; (28) posterior of another brachial interior showing 

 the cardinal process, X 2, paratype, 111794b. 



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

 Garden (15') Quadrangle, Va. 



(22, 23) Pedicle and brachial views of a complete specimen, X 2, paratype, 

 ii7352n; (26) pedicle interior showing thick teeth, X 2, paratype, 117352-0. 

 Chatham Hill formation, Grayson Farm, 4 miles southwest of Bland, Bland 

 County, Va. 



D. Cristiferina cristata Cooper, new species 962 



(29) Brachial exterior of a complete specimen, X 3, paratype, 117354a; (30) bra- 

 chial interior, X 3, showing high myophore ridge, paratype, 117354b. 



Botetourt formation (Cybeloides bed), opposite dam on Shenandoah River, 

 north side, 1.5 miles N. 61 ° E. of Edinburg, Edinburg (15') Quadrangle, Va. 



E. Eremotrema biconvexum Cooper, new species 960 



(3 I_ 3S) Respectively posterior, anterior, side, brachial, and pedicle views, X 1, of 

 the holotype, 117350a; (36-40) respectively posterior, anterior, side, brachial, 

 and pedicle views, X 2, of the holotype; (43) brachial interior of an old speci- 

 men, X 2, showing swellings obscuring the brachiophores and the anterior pallial 

 marks, paratype, 117350c; (44, 45) brachial interior and posterior of brachial 



