﻿PART II CHAZYAN AND RELATED BRACHIOPODS — COOPER II5I 



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 Ward Cove formation (just above Nidulites), \ mile west of Pounding Mill, 

 north of U. S. Highway 19, Pounding Mill (15') Quadrangle, Va. 



H. Sphenotreta acutirostris (Hall) 664 



(37-40) Respectively brachial, anterior, side, and pedicle views of a complete 

 specimen, X 4, hypotype, specimen in Carnegie Mus. (no number). 



Crown Point formation, Valcour Island, Lake Champlain, Plattsburg (15') 

 Quadrangle, N. Y. 



I. Protosyga elongata Cooper, new species 677 



(41-45) Respectively posterior, anterior, brachial, side, and pedicle views, X 6, 

 of the paratype, 111408a; (46) pedicle view showing foramen, X 8, paratype, 

 111408b. 



Bromide formation (Mountain Lake member), small anticline northwest of 

 Galbraith Hotel at Bromide, Johnston County, Okla. 



J. Hallina saffordi Winchell and Schuchert 690 



(47) Slab showing several complete individuals, X 3, hypotype, 117258a. 



Lebanon formation, 2\ miles east of Priest, Franklin (15') Quadrangle, Term. 



K. Hallina globidaris Cooper, new species 689 



(48-52) Respectively anterior, posterior, side, brachial, and pedicle views of a com- 

 plete specimen, X 4, holotype, 117257a. 

 Auburn chert, \ mile east of Auburn, Elsberry (15') Quadrangle, Mo. 



Plate 144 

 Laticrura 



A. Laticrura pionodema Cooper, new species 9^9 



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

 plete specimen, X 2, paratype, H7269g; (6-10) respectively posterior, anterior, 

 side, pedicle, and brachial views of another complete specimen, X 2, paratype, 

 117269-I; (n, 12) brachial and side views, X 1, of the holotype, H7272i; 

 (13-15) brachial, side, and pedicle views, X 2, of the holotype; (16) pedicle 

 interior, X 3, showing long dental plates, paratype, \1726gi; (17) the preceding 

 specimen, X 3, tilted to show the edge of the dental plates, the angulation in 

 them, and the apical plate; (18) another pedicle interior showing the form of 

 the muscle area, X 2, paratype, 117269k; (19) posterior part of the pedicle inte- 

 rior showing the dental plates, X 2, paratype, 117272c; (20) brachial interior, 

 X 2, paratype, H7272g; (21) brachial interior of the preceding specimen, X 6, 

 showing brachiophores, supporting plates, cardinal process, and thin median 

 septum; (22) same as preceding, X 6, but tilted to show notothyrial cavity, 

 and bases of the brachiophores; (23) brachial interior showing long brachio- 

 phores, X 2, paratype, 117269c; (24) same as preceding, X 4, showing septum, 

 notothyrial chamber, cardinal process, and brachiophores; (25) same as preced- 

 ing, X 6, showing long brachiophores in detail. 



Effna-Rich Valley formations, Porterfield Quarry, 5 miles east of Saltville, 

 Maccrady (T.V.A. 218-NW) Quadrangle, Va. 



B. Laticrura magna Cooper, new species 982 



(26-29) Pedicle, posterior, brachial, and side views of a complete but somewhat 

 crushed specimen, X 3, paratype, 117268a. 



Oranda formation, along the railroad, \ mile west of Strasburg, Strasburg 

 (15') Quadrangle, Va. 



C. Laticrura pionodema Cooper, new species 989 



(30) Exterior brachial valve, X2, paratype, 117273; (31) pedicle exterior, X 2, 

 paratype, 117274b; (32) plasticine replica of the brachial interior, X 2, showing 

 notothyrial chamber and long median septum; (33) impression of the brachial 



