﻿PART II CHAZYAN AND RELATED BRACHIOPODS — COOPER 1 245 



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 the holotype, 124232; (16, 17) brachial and posterior views of the holotype, X 2, 

 showing the interarea and pseudodeltidium. 

 Horizon and locality same as preceding. 



D. Sowerbyella merriami Cooper, new species 785 



(18-22) Respectively anterior, pedicle, brachial, posterior, and side views, X 1, of 

 the holotype, 124234a. 

 Horizon and locality same as preceding. 



E. Eoplectodonta altemata (Butts) 808 



(23) Brachial view of a nearly complete specimen, X 2, showing posterior 

 wrinkles and ornamentation, hypotype, 124231a; (24) pedicle view of another 

 specimen showing the same features, X 2, hypotype, 124231b. 

 Horizon and locality same as preceding. 



F. Paurorthis gigantea Cooper, new species 967 



(25-29) Respectively posterior, brachial, side, anterior, and pedicle views, X i, of 

 the holotype, 124235a; (30) brachial view of the holotype, X 2, showing the 

 gentle fascicles and fine costellae; (31) interior of the pedicle valve, X 2, show- 

 ing large teeth with crural fossettes, delthyrial cavity, and thick median ridge, 

 paratype, 124235c. 



Horizon and locality same as preceding. 



