﻿1240 SMITHSONIAN MISCELLANEOUS COLLECTIONS VOL. I27 



Page 

 respectively X 1 and X 2 enlargements of an imperfect pedicle valve showing 

 muscle scars and subcarinate pseudodeltidium, paratype, 117740c; (7, 8) exte- 

 rior and interior of the brachial valve, X I, holotype, H774of ; (9, 10) exterior 

 and interior of the holotype, X 2, showing ornamentation and cardinalia ; (11) 

 posterior of the holotype, X 2, showing the cardinal process. 



Ridley or Murfreesboro formation, Crystal Creek, 5 miles south of Pikeville, 

 Sequatchie Valley, Pikeville Special (15') Quadrangle, Tenn. 

 (12) Exterior of another brachial valve, X 1, paratype, 123279b; (13) interior 

 of brachial valve showing cardinalia, X I, paratype, 123279c. 



Ridley or Murfreesboro formation, \\ miles southeast of Hembree Mill, 

 Sequatchie Valley, Pikeville Special (15') Quadrangle, Tenn. 



B. Strophomena planobesa Cooper, new species 943 



(14) Exterior of a pedicle valve on a chert slab, X I, paratype, 117741a; (15, 16) 

 interior of two pedicle valves, X h one showing a thickening around the muscle 

 area, the other not having this feature preserved, paratypes, 117741b, 117741c; 

 (17) brachial interior preserving the cardinalia, Xi, paratype, H774id. 



Murfreesboro formation (top), at the junction of the west fork of Stone River 

 with U. S. Highway 70, i\ miles northwest of Murfreesboro, Murfreesboro 

 (15') Quadrangle, Tenn. 



Plate 262 

 Strophomena 



A. Strophomena bellilineata Cooper, new species 931 



(1) Plasticine replica of the exterior of a large pedicle valve, X h holotype, 

 117707a; (6, 7) plasticine replica of the pedicle interior showing muscle scars 

 and the impression from which it was made, X 1, holotype, 117707a, counter- 

 part to previous figure; (2) plasticine replica of the exterior of a brachial valve, 

 X I, paratype, 117707b; (3, 4) plasticine replica of the brachial interior show- 

 ing cardinalia, and the impression of the brachial interior from which it was 

 prepared, X 1, paratype, 117707c; (5) plasticine replica of the interior of another 

 large brachial valve, X 1, paratype, 123283. 



Oranda formation, north side of road 0.6 mile northwest of Linville Station, 

 Broadway (15') Quadrangle, Va. 



B. Strophomena inspeciosa Willard 939 



(8) Exterior of the brachial valve, X 1, hypotype, 117726; (11) ornamentation, 

 X 4, of the preceding specimen. 



Wardell part of Dryden formation, road up Lone Mountain Creek, west of 

 Lone Mountain, Tazewell (T.V.A. 154-NE) Quadrangle, Tenn. 

 (9, 10) Respectively X 1 and X 2 views of the brachial interior, showing cardi- 

 nalia and median ridge, hypotype, 117727a. 



Wardell formation (40 feet below Hesperorthis zone), cut on U. S. High- 

 way 25E, \ mile north of Indian Creek, Howard Quarter (T.V.A. 162-NW) 

 Quadrangle, Tenn. 



Plate 263 



Strophomena, Trigrammaria 



A. Trigrammaria winchclli (Hall and Clarke) 875 



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

 men, X I, hypotype, 117752a; (5) brachial view of the preceding specimen en- 

 larged, X 2, to show ornamentation ; (8, 9) respectively X 2 and X 1 views of 

 the interior of a pedicle valve showing the musculature, hypotype, 117752b. 



