﻿PART II CHAZYAN AND RELATED BRACHIOPODS — COOPER IO35 



Page 

 Plate 12 



Leptobolus, Lingulasma 



A. Leptobolus insignis Hall 214 



(1) Pedicle exterior, X 8, figured specimen, 71887a; (2) pedicle interior showing 

 ridges, X 8, figured specimen, 71887b; (3) brachial exterior, X 8, figured speci- 

 men, 71887c; (4) brachial interior showing anterior median ridge, X 8, figured 

 specimen, 7i887d. 



Eden (Fulton), St. Thomas, Ky. 



B. Leptobolus lepis Hall 214 



(5) Brachial interior, X 8, figured specimen, 45239b; (6) interior of the pedicle 

 valve, X 8, figured specimen, 45239a. 



Trenton (Cynthiana), West Covington, Ky. 



C. Leptobolus ? sp. 1 214 



(7) Pedicle valve, X 4, figured specimen, 109344a; (8) brachial valve, X 4, fig- 

 ured specimen, 109344b. 



Edinburg formation (Liberty Hall facies), Middle River, 4 miles north-north- 

 east of Staunton, Staunton (15') Quadrangle, Va. 



D. Lingulasma matutinum Cooper, new species 233 



(10) Imperfect specimen X I, paratype, 109348c; (11) imperfect specimen pre- 

 serving some of the original shell surface, X 2, holotype, 109348a; (9) enlarge- 

 ment, X 10, of part of surface of holotype. 



Arline formation, north side of wagon road in glade, \ mile southeast of 

 Friendsville, Concord (T.V.A. 138-SW) Quadrangle, Tenn. 



E. Lingulasma oklahomense Cooper, new species 233 



(13) Brachial valve, X I, showing cavity left by impression of platform on mud 

 filling, holotype, 109353b; (14) a specimen similar to the preceding showing the 

 same feature, X ii, paratype, I09352d; (15) brachial valve not so deformed as 

 the preceding ones, X 1, paratype, 109352c; (12) ornamentation, X 3, of the pre- 

 ceding; (16) imperfect specimen with well-preserved ornamentation, X 1, para- 

 type, 109353a; (17) enlargement, X 10, of the ornamentation of the preceding 

 specimen. 



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

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

 Carter County, Okla. 



F. Lingulasma compactum Cooper, new species 232 



(18, 19) Views of both valves (impossible to say which is pedicle), X I, holotype, 

 109347; (20) the ornamentation of holotype, X 4, showing closely crowded lines; 

 (21) same, X 8. 



Oranda formation, 0.6 mile northwest of Linville Station, Broadway (15') 

 Quadrangle, Va. 



Plate 13 

 Glossella, Glyptoglossa, Lingulasma, Obolellina, Orbiculoidea, Schizambon 



A. Obolellina magnifica Billings 231 



(1) Brachial exterior, X 1, hypotype, 116800b; (2) exterior of pedicle valve, X 1, 

 hypotype, 116800a; (3) interior of brachial valve showing callosites, X 1, hypo- 

 type, n68ood. 



Rockland formation, Bonnechere River, 1 mile below Eganville, Ontario, 

 Canada. 



B. Glyptoglossa sp. 1 227 



(4) Silicified but imperfect pedicle valve, X 2, figured specimen, 1 16770. 



