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CHAZYAN AND RELATED BRACHIOPODS: 

 PART II, PLATES 



By G. ARTHUR COOPER 



Curator of Invertebrate Paleontology and Paleobotany, 

 United States National Musuem 



EXPLANATION OF PLATES 



(Page numbers refer to text, Part I.) 

 Plate i 



LlNGULELLA, OBOLUS, PSEUDOLINGULA, WeSTONIA 



Page 



A. Westonia clathrata (Winchell and Schuchert) 209 



(1) Exterior of pedicle valve, showing wavy parallel lines, X 8, paratype, 45546a; 

 (2) exterior of brachial valve, X 6, lectotype, 45546b. 

 Decorah formation (Guttenberg member — Rhinidictya bed), St. Paul, Minn. 



B. Westonia sp. 1 210 



(3) Exterior of a pedicle valve showing a chevronlike ornamentation, X 6, figured 

 specimen, 116781a. 



Whitesburg formation just above the Fetzer formation, 2^ miles southeast of 

 Whitesburg, Bulls Gap (T.V.A. 171-SE) Quadrangle, Tenn. 



C. Lingulella virginiensis Cooper, new species 206 



(4, 5) Respectively exterior views, X 4, of the brachial and pedicle valves of the 

 holotype, 109296, showing difference in ornamentation of the valves. 



"Ottosee shale" (probably Benbolt), 1 mile west of Rye Cove, Clinchport 

 (T.V.A. 188-N W) Quadrangle, Tenn. 



D. Pseudolingula ? luttrellensis Cooper, new species 216 



(6) Brachial view, X 2, of exterior of holotype, 109286b; (7, 9, 10) respectively 

 side, brachial, and pedicle views, X 1, of the holotype; (8) exterior of another 

 brachial valve, X I, paratype, 109286c; (11, 12) exterior of a large pedicle valve, 

 respectively X 2 and X 1, paratype, 109286a. 



Moccasin formation, near Luttrell, Luttrell (T.V.A. 155-NW) Quadrangle, 

 Tenn. 



E. Lingulella foster montensis (Butts) 199 



(14, 15) Exterior of the pedicle valve, X2 and X I, paratype, 71490a; (13, 16) 

 exterior of a brachial valve, X 1 and X 2, lectotype 71490b; (17, 18) another 

 well-preserved brachial valve, X 1 and X 2, hypotype, I09284d. 



Attalla formation (just above red mudstone forming base of Chickamauga), 

 Foster Mountain, ii miles northwest of Clay, Leeds (15') Quadrangle, Ala. 



F. Lingulella tenuitesta Cooper, new species 205 



(19, 20) Respectively the exterior of the brachial and pedicle valves, X 4, para- 

 type, 109299b, and holotype, 109299a. 



Columbiana formation, 0.2 mile southeast of Pratt Ferry, Blocton (15') Quad- 

 rangle, Ala. 



G. Lingulella ? glypta Cooper, new species 200 



(21, 22) Pedicle and brachial views of a small specimen, X 2, paratype, 116760b; 



SMITHSONIAN MISCELLANEOUS COLLECTIONS, VOL. 127, PART II 



1025 



