﻿IO36 SMITHSONIAN MISCELLANEOUS COLLECTIONS VOL. I27 



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

 County, Va. 



C. Orbiculoidea eximia Cooper, new species 275 



(5) Large brachial valve, X 1, paratype, 117953a. 



Bromide formation (Pooleville member — Oxoplecia gouldi zone), Rock Cross- 

 ing of Hickory Creek, about center sec. 35, T. 5 S., R. I E., Criner Hills, Carter 

 County, Okla. 



D. Schisambon cf . S. duplicimuratum Hudson 266 



(6) Interior of pedicle valve, X 4» figured specimen, 117954. 



St. Martin formation, \ mile north of Cap St. Martin, Quebec, Canada. 



E. Glossella liumbona Cooper, new species 228 



(7, 8) Brachial and pedicle views, X I, of the holotype, 116785a; (9, 10) pedicle 

 and brachial views, X 2, of the holotype ; (n) enlargement, X 5, of part of shell 

 of holotype; (12) brachial view of a partially exfoliated specimen showing faint 

 median ridge, X 2, paratype, 116785b. 



Bromide formation (Pooleville member — Oxoplecia gouldi zone), Rock Cross- 

 ing of Hickory Creek, about center sec. 35, T. 5 S., R. 1 E., Criner Hills, Carter 

 County, Okla. 



F. Lingulasma occidentale Cooper, new species 234 



(13) Anterior part of an incomplete specimen, X 1, paratype, 116793a; (14) in- 

 complete specimen with beaks broken away, X I, holotype, 116793b; (15, 16) 

 brachial and pedicle views of the posterior part of a specimen with both valves 

 in contact, X I, paratype, 1 17955; (*7) enlargement, X 10, of part of the shell 

 surface of holotype. 



Yellow limestone above 25-foot sandstone of Eureka group, 3 miles north of 

 Martin Ranch on southwest side of hill 8167, Monitor Range, Roberts Mountains 

 (i°) Quadrangle, Nev. 



Plate 14 

 schizambon, slphonotreta 



A. Siphonotreta americana Cooper, new species 263 



(1, 9) Pedicle exterior, respectively X2 and X 3, paratype, I09636g. The speci- 

 men shown in fig. 9 is tipped to show the foramen. (2, 8) hinge area of brachial 

 valve, showing thickened rim, X2 and X 3, paratype, 109636c; (3) exterior of 

 preceding, X 2; (4, 11) exterior of brachial valve, respectively X 2 and X 4, to 

 show spines, paratype, 109636b; (6) pedicle exterior showing small foramen, 

 X 2, paratype, I09636d ; (7, 10) exterior and side views of another pedicle valve, 

 X 2, holotype, 109636L 



Arline formation, north side of wagon road in glade, \ mile southeast of 

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



(5) Pedicle exterior, X 2, paratype, 109635. 



Locality same as preceding but from the upper 25 feet of the Arline formation. 



B. Schisambon subradiatum Cooper, new species 269 



(12) Imperfect pedicle exterior showing long foraminal slit, X 2, paratype, 

 109686c; (17, 18) side and exterior views of the pedicle valve, X 2, holotype, 

 109686c; (16) enlargement, X 3, of holotype; (13) foramen, X 6, of holotype; 

 (15) imperfect brachial valve, X 2, paratype, I09686d; (14, 19) a nearly perfect 

 brachial valve preserving the spines, respectively X 2 and X 3, paratype, I09686g. 

 Horizon and locality same as A above. 



C. Schisambon irregulare Cooper, new species 267 



(20, 21) Brachial valve, X 3 and X I, holotype, 109669. 



