﻿PART II CHAZYAN AND RELATED BRACHIOPODS — COOPER 1 239 



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 deltidium, hypotype, 117734a; (12) posterior of the preceding specimen, X 2, 

 showing the details of the muscle area. 



Wardell formation, north side of the road 1.1 miles northeast of Lee Valley, 

 Lee Valley (T.V.A. 171-NW) Quadrangle, Tenn. 

 (3) Brachial exterior of a complete specimen, X I, hypotype, 117732a. 



Wardell formation (lower sponge horizon), behind the Brick Church west of 

 Rye Cove, Clinchport (T.V.A. 188-NW) Quadrangle, Va. 



(14) Pedicle interior showing ridges bounding posterior parts of muscle field, X I, 

 hypotype, 117737a. 



Wardell formation, bend of railroad just west of Liberty Hill, Dutch Valley 

 (T.V.A. 154-SE) Quadrangle, Tenn. 



(15) Brachial interior, X 1, hypotype, 117733a; (16) cardinalia, X 2, of the 

 previous specimen. 



Wardell formation, section on U. S. Highway 25E, Thorn Hill, Avondale 

 (T.V.A. 162-SW) Quadrangle, Tenn. 



Plate 260 

 Strophomena 



A. Strophomena oklahomensis Cooper, new species 94 2 



(1-5) Respectively posterior, anterior, side, brachial, and pedicle views, X 2, of 

 the holotype, 117738a; (7) pedicle view, X I, of the holotype. 



Bromide formation (Pooleville member — just above zone with Multicostella 



convexa), dam on Spring Creek, sec. 17, T. 2 S., R. I W., Murray County, Okla. 



(6) Exterior of a brachial valve, X 2, paratype, 11 7739a; (10) ornamentation, 



X4, of the preceding specimen; (8, 9) respectively X I and X2 views of the 



pedicle interior showing the muscle area, paratype, 117739b. 



Bromide formation (Pooleville member — just above zone with Multicostella 

 convexa), Rock Crossing of Hickory Creek, approximately center sec. 35, 

 T. 5 S., R. 1 E., Criner Hills, Carter County, Okla. 



B. Strophomena criner ensis Cooper, new species 934 



(12, 13) Brachial and pedicle views of another complete specimen, X 2, paratype, 

 117717a; (21, 22) respectively X I and X 2 enlargements of a fine pedicle inte- 

 rior showing the muscle field and pallial markings, paratype, 117715; (23) an- 

 other pedicle interior X I, paratype, 117717c; (24) ornamentation of a brachial 

 valve, X 4, paratype, 117717b. 



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

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

 Hills, Carter County, Okla. 



(11) Pedicle exterior of a complete specimen, X 2, paratype, 117719c; (14-18) 

 respectively brachial, pedicle, anterior, posterior, and side views, X 2, of a para- 

 type, 117716a; (19, 20) brachial and pedicle views, X I, of the same paratype; 

 (25) brachial interior showing cardinalia, X 2, paratype, 117719a. 



Bromide formation (Pooleville member), basal cobbly beds, Spring Creek, 

 sec. 17, T. 2 S., R. 1 W., Murray County, Okla. 



Plate 261 

 Strophomena 



A. Strophomena planobesa Cooper, new species 943 



(1) Exterior of a small pedicle valve, X 2, paratype, ii7740g; (2, 3) exterior and 

 interior of the pedicle valve, X 1, paratype, 123279a; (4) pedicle interior show- 

 ing ridge partially surrounding muscle area, X 1, paratype, 117740c; (5, 6) 



