﻿PART II CHAZYAN AND RELATED BRACHIOPODS — COOPER 1235 



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 Elway formation, road cut and quarry on U. S. Highway 25W, 4.7 miles south 

 of Clinton, Powell Station (T.V.A. 137-SE) Quadrangle, Term. 



B. Rhipidomena tenuitesta (Willard) 872 



(13) Brachial view of a large imperfect specimen with outlines restored, X I, 

 hypotype, 117697b; (14) side view, X 1, of the preceding specimen; (15) 

 exterior of a large pedicle valve, X 1, hypotype, 117697a; (16) apex of the 

 preceding enlarged, X 4, to show the minute foramen; (17) pedicle interior 

 showing the flabellate muscle area, X 1, hypotype, 117695c. 



Lincolnshire formation (Hogskin member), Lee Valley, Lee Valley (T.V.A. 

 171-NW) Quadrangle, Tenn. 



C. Rhipidomena tenuitesta (Willard) 872 



(18) Pedicle view of a large individual, X I, hypotype, 1 17696. 



Lincolnshire formation, i mile north of Eidson, Kyles Ford (T.V.A. 170-SE) 

 Quadrangle, Tenn. 



Plate 252 

 Rhipidomena 



A. Rhipidomena tennesseensis (Willard) 870 



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

 plete, full-grown specimen, X I, hypotype, 117683a. 



Benbolt formation, \ mile southeast of Rye Cove, Clinchport (T.V.A. 

 188-NW) Quadrangle, Va. 



B. Rhipidomena tennesseensis (Willard) 870 



(6) Pedicle view of a large complete specimen, X 1, hypotype, 117685. 



Benbolt formation, 0.2 mile southwest of New Bethel Church, \ mile east of 

 the junction of Virginia Highway 74 and U. S. Highway 54, Hilton (T.V.A. 

 197-NW) Quadrangle, Va. 

 (7-10) Respectively anterior, posterior, side, and pedicle views of a large, complete 

 specimen, X I, hypotype, 117694a; (13) pedicle interior showing the broadly 

 flabellate muscle area and pseudodeltidium, X I, hypotype, 117694b. 



Benbolt formation, road cut 1.6 miles northeast of Heiskell, Powell Station 

 (T.V.A. 137-SE) Quadrangle, Tenn. 

 (11, 12) Pedicle and brachial views of a young specimen, X I, hypotype, 117691a. 

 Benbolt formation (upper), 0.1 to 0.2 mile north of the road, 1.1 miles north- 

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



(14) Brachial interior of a young individual, X 1, hypotype, 117692a. 



Benbolt formation, f mile southwest of Mount Eager Church, Hogskin Valley, 

 Powder Springs (T.V.A. 154-SW) Quadrangle, Tenn. 



Plate 253 



Rhipidomena 



A. Rhipidomena tennesseensis (Willard) 870 



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

 parallel-sided specimen, X 1, hypotype, 117684a. 



Benbolt formation, Brick Church, i\ miles west of Rye Cove, Clinchport 

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

 (6, 7) Brachial and side views of a complete specimen, X I, hypotype, 117682a. 

 Benbolt formation, 1 mile southeast of Hansonville, Brumley (T.V.A. 205-SE) 

 Quadrangle, Va. 



