﻿Il82 SMITHSONIAN MISCELLANEOUS COLLECTIONS VOL. I27 



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 specimen, X I, hypotype, 111796a; (27) side view of another complete specimen, 

 X 1, hypotype, ni7o6f. 



Lincolnshire formation, Clinch Valley at Shiloh Church, near center of north- 

 west subquad. of Pressmens Home (T.V.A. 171-NE) Quadrangle, Term. 

 (13) Pedicle interior, X 2, showing pailial marks, adductor pit, and diductor cal- 

 losities, hypotype, 117415J ; (15) another pedicle interior showing callosities and 

 pailial marks connected with them, X 2, hypotype, 117415$; (14) muscle region 

 of the preceding enlarged X 3 to show callosities in detail; (16, 18) brachial 

 and pedicle views of a nearly perfect specimen, X 2, hypotype, 117415b; (19) 

 brachial interior of a young specimen, X 3, hypotype, 117415c; (20) brachial 

 view of a wide specimen, X 1, hypotype, H74i5g; (21) brachial interior, X l, 

 showing unusual development of septa, hypotype, 117415a; (26) posterior view 

 of preceding, X 3, showing cardinal process; (25) brachial interior, X 3, show- 

 ing septa, brachiophores, and cardinal process. 



Lincolnshire formation (90 to 120 feet above the "Mosheim"), along U. S. 

 Highway 25E, 1 mile north of Indian Creek, Evans Ferry section, Howard 

 Quarter (T.V.A. 162-N W) Quadrangle, Tenn. 



Plate 183 

 sowerbyites 



A. Sowerbyites gildersleevei Cooper, new species 725 



(1, 2) Brachial and pedicle views, X I, of the holotype, 117401Z; (3) brachial 

 view, X 2, of the holotype ; (4) exterior of a pedicle valve, X 1, paratype, 

 H740ip; (5, 6) respectively X 1 and X 2 views of the brachial exterior, para- 

 type, U740id; (7) muscle area of the pedicle interior, X 2, paratype, 11740IV; 

 (8) pedicle interior, X 2, showing callosities anterior to diductor scars and pailial 

 marks anterior to the callosities, paratype, H740ih; (9) another pedicle interior 

 showing pailial marks, X 2, 117401c ; (10) same as preceding, Xi; (n) 

 brachial interior, X 3, showing median septa and genital markings, paratype, 

 ii740iq; (13) another brachial interior, X 2, showing genital markings, para- 

 type, 117401k; (12) posterior of a brachial valve, X 3, showing cardinalia, 

 paratype, 117401b; (14) posterior of another brachial interior showing septa 

 and cardinalia, X 2, paratype, 117401m; (15) posterior view of the preceding, 

 X 3, showing cardinal process and chilidial plates; (16) brachial interior 

 showing pailial marks, X I, paratype, 11740m. 



Lincolnshire formation (8 feet below the Cybeloides bed), north side of road 

 along Tumbling Run, \\ miles southwest of Strasburg, Strasburg (15') Quad- 

 rangle, Va. 



B. Sowerbyites triseptatus ( Willard) 730 



(17) Brachial view of a complete specimen, X 2, hypotype, 123252b; (18) exterior 

 of a pedicle valve showing wrinkles along the posterior margin, X I, hypotype, 

 123252a. 



Lincolnshire formation, 0.2 mile southwest of Shiloh Church, near center of 

 northwest subquad., Pressmens Home (T.V.A. 171-NE) Quadrangle, Tenn. 



Plate 184 



blmuria, eoplectodonta, isophragma, palaeostrophomena, 

 Sowerbyites, Titanambonites 



A. Eoplectodonta alternata (Butts) 808 



(1, 2) Brachial and side views, X 2, of a hypotype, 117549a; (3) brachial view, 

 X 1, of the hypotype. For additional views see pi. 207, B, figs. 2-25. 



