﻿1 128 SMITHSONIAN MISCELLANEOUS COLLECTIONS VOL. 12J 



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 Whitesburg formation, i^ miles west of Bulls Gap, Bulls Gap (T.V.A. 

 171-SE) Quadrangle, Term. 



E. Camerella sp. 4 587 



(14) Exterior of brachial valve showing depression in fold, X 2, figured specimen, 

 123294. 



Horizon and locality same as preceding. 



F. Onychoplecia matutina Cooper, new species 534 



(15) Exterior of a small pedicle valve, X 3, paratype, 117941a; (16) exterior of 

 a brachial valve showing radial lines of exfoliated shell, X 3, paratype, 117941b. 



Jasper formation, just northwest of Pindall, Yellville (30') Quadrangle, Ark. 



(17) Exterior of another pedicle valve, larger than that of fig. 15, X 3, holotype, 

 117940a. 



Everton formation (base), near school, northwest of Pindall, Yellville (30') 

 Quadrangle, Ark. 



G. Macrocoelia plebeia Cooper, new species 899 



(18) Exterior of a complete specimen seen from the brachial side, X 2, holotype, 

 117793a; (19) imperfect brachial valve showing cardinalia, X 2, paratype, 

 117793b. 



Lenoir formation (45 feet above the base), 0.1 mile southwest of triangulation 

 point 37SH, Wildwood (T.V.A. 147-SE) Quadrangle, Tenn. 



H. Hesperonomiella minor (Walcott) 337 



(20) Small slab, X I, showing pedicle and brachial interiors, hypotype, 1 17939; 

 (21) view of the same slab enlarged, X 3, to show the pallial markings, teeth, 

 and muscle scars of the interior of the two pedicle valves; (22) the interior of 

 the brachial valve, X 2, showing the stout cardinalia. 



Upper Pogonip = Wahwah formation, T. 22 S., R. 14 W., Confusion Range, 

 Millard County, Utah. 



Plate 122 



llricameea, plectocamara 



A. Liricamera nevadensis Cooper, new species 592 



(1-4) Respectively posterior, side, anterior, and brachial views of a complete speci- 

 men, X 1, holotype, \1j1j4g; (5) posterior part of the pedicle interior showing 

 the spondylium, X 2, paratype, 117174b; (6) another pedicle interior seen from 

 the side, X 2, paratype, 117174c; (7) pedicle interior of a nearly perfect valve, 

 X 2, paratype, 117174^ (8) brachial interior, X 2, paratype, U7i74d. 



Pogonip group (Orthidiella zone, mottled zone 700 feet below the Eureka 

 quartzite), base of the first ridge east of Frenchman Flat, Las Vegas (i°) 

 Quadrangle, Nev. 



B. Plectocamara costata Cooper, new species 598 



(9-13) Respectively anterior, side, pedicle, brachial, and posterior views of a com- 

 plete specimen, X 3, holotype, 111360a. 



Lincolnshire formation (Hogskin member), Sally Cleveland Farm, \ mile 

 southwest of Washburn, Dutch Valley (T.V.A. 154-SE) Quadrangle, Tenn. 

 (14-18) Respectively brachial, posterior, pedicle, anterior, and side views of a 

 young specimen, X 3, paratype, 111368a; (19) pedicle interior showing spon- 

 dylium, X 3, paratype, 111368b. 



Lincolnshire formation (Hogskin member), on Washburn road, 4^ miles 

 west-southwest of Thorn Hill, Avondale (T.V.A. 162-SW) Quadrangle, Tenn. 

 (20, 21) Brachial interior in normal view and tilted to show cruralium and absence 

 of median septum, X 3, paratype, 11 1356. 



Lincolnshire formation (Hogskin member), ca. £ mile north of Thorn Hill, on 

 U. S. Highway 25E, Avondale (T.V.A. 162-SW) Quadrangle, Tenn. 



