﻿1244 SMITHSONIAN MISCELLANEOUS COLLECTIONS VOL. 127 



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 (22-24) respectively pedicle, anterior, and brachial views of a small imperfect 

 specimen, X i> figured specimen, 123292b. 



Whistle Creek formation (75 feet above the Knox dolomite), on Indian Run, 

 I mile northwest of Lusters Gate, Blacksburg (15') Quadrangle, Va. 



F. Xenambonites undosus Cooper, new species 815 



(25) Interior of the brachial valve showing cardinalia, platform, and alate form 

 of shell, X 4, paratype, H7468r; (26) anterior and inner view of the pedicle 

 valve showing the flattened border, X 3, paratype, H7468g; (27) exterior of the 

 pedicle valve showing peculiar fold and alate form, X 4, paratype, 117468-I; 

 (28) exterior of the brachial valve showing ornamentation and deep sulcus, 

 X 4, paratype, 117468m. 



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

 rangle, Ala. 



G. Zygospira elongata Cooper, new species 670 



(29-32) Respectively pedicle, anterior, side, and brachial views, X 2, of the holo- 

 type, 111375a. 

 Lebanon formation, Readyville, Cannon County, Tenn. 



H. Stenocamara perplexa Cooper, new species 603 



(33-37) Respectively anterior, brachial, posterior, pedicle, and side views of a com- 

 plete specimen, X T , paratype, 123289; (38-40) respectively brachial, side, and 

 pedicle views, X 2, of the same specimen. 



Ellett formation (55 feet above the base), Indian Run, | mile northwest of 

 Lusters Gate, Blacksburg (15') Quadrangle, Va. 



I. Oligorhynchia sp. 1 663 



(41-44) Respectively brachial, side, anterior, and pedicle views of a complete but 

 exfoliated specimen, X 3, figured specimen, 118018a. 



Sevier = Dryden formation, 0.7 mile south of Mooney Cemetery, Bulls Gap 

 (T.V.A. 171-SE) Quadrangle, Tenn. 



J. Dinorthis transversa Willard 398 



(45) Plasticine replica of the exterior of the brachial valve, X l, hypotype, 

 118024b; (46) plasticine replica of the exterior of an imperfect specimen, X 1, 

 hypotype, 118024a; (47) impression of the pedicle interior showing the muscle 

 scars, X 1, counterpart of the preceding. 



Sevier formation (sandstone No. 5), 0.57 mile southwest of Rocky Branch, 

 Kinzel Springs (T.V.A. 148-NE) Quadrangle, Tenn. 



Plate 269 

 Eoplectodonta, Hesperorthis, Paurorthis, Plectorthis, Reuschella, Sowerbyella 



A. Plectorthis obesa Cooper, new species 450 



(1-5) Respectively brachial, posterior, side, anterior, and pedicle views of a com- 

 plete specimen, X I, paratype, 124233a. 



Dark shale below the Eureka quartzite, below two knobs of Eureka quartzite, 

 north side of canyon, 3.1 miles N. 32 E. of Blair (Segura) Ranch, Antelope 

 Mountains, Roberts Mountains (i°) Quadrangle, Nev. 



B. Reuschella vespertina Cooper, new species 979 



(6-9) Respectively pedicle, anterior, side, and brachial views, X I, of the holotype, 

 124230a, showing deflected sides; (10) posterior view, X 1, of a paratype, 

 124230b. 

 Horizon and locality same as preceding. 



C. Hesperorthis antelopensis Cooper, new species 344 



(11-15) Respectively anterior, side, posterior, brachial, and pedicle views, X 1, of 



