PLATE V. 



Fig. 1. Tremafis punctostoriata. Hall. Clifton, Tennessee, from the Saltillo 

 bed. 



Fig. 2. Trematis fragilis, Ulrich. Figured in Ohio Paleontology, vol. 2, plate 1, 

 fig. 9, as Trematis punctostriata. No. 102 of the James collection 

 at Chicago University. Cincinnati, Ohio. 



Fig. 3. Trematis fragilis, Ulrich. Lower valve, showing the pedicel scar. 

 Cincinnati, Ohio. 



Fig. 4. Trematis fragilis, Ulrich. LTpper valve. Cincinnati, Ohio. 



Fig. 5. Lingula covingtoncnsis. Hall and Whitfield. Interior of valve, en- 

 larged l.S diameters. West Covington, Kentucky, between 25 and 

 50 feet above low water in the Ohio river, from the strata beneath 

 the two foot crinoidal layer which underlies the Fulton bed. 



Fig. 6. Lingula covingtonensis, Hall and Whitfield. Interior of valve, en- 

 larged 2 diameters. Frankfort, Kentucky, from the Logana bed. 



Fig. 7. Lingula zvaynesboroensis. Brachial valve, with the tip of the pedicel 

 valve exposed at the top, enlarged 2 diameters. Three and a half 

 miles northwest of Waynesboro, Tennessee, near the home of 

 W. D. Helton, on Beech creek. 



Fig. 8. Crania granulosa-cuniberlaudcnsis. Llpper valve, enlarged 2 diam- 

 eters. A mile and a quarter southwest of Cumberland City, Ten- 

 nessee, along the railroad, south of the crossing of the Erin pike, 

 from the Stones River group. 



Fig. 9. Leptacna tenuistriata? Pedicel valve. B. the same, with a part of the 

 anterior margin restored; enlarged. Clifton, Tennessee, from the 

 Saltillo bed. 



Fig. 10. Hehcrtclla alvcata-riclunondcnsis. Type. Brachial valve. Richmond, 

 Indiana, from the top of the Whitewater bed, associated with 

 Rliynchotrema dentata. 



Fig. 11. Platystrophia cyplia. James. Type. Cardinal view. No. 2326. James 

 collection, Chicago L''niversity. Warren county, Ohio. 



Fig. 12. Rafinesquina declivis, James. Pedicel valves. A,B, the type. B, lat- 

 eral view, showing deflection of the sides due to pressure. C, 

 triangular shell with the margin only moderately deflected. D, an- 

 other specimen of the same series, presenting the normal outline, 

 except at the cardinal angles, which usually are more nearly rec- 

 tangular. Series No. 2392. James collection, at Chicago University. 

 Boyd's station, Kentucky, from the strata underlying the Eden 

 formation. 



Fig. 13. Rafincsqiiina zvinchcstcrensis. A, brachial valve; southwest of An- 

 tioch church, west of the Million tunnel, in Madison county, Ken- 

 tucky. B, brachial valve, interior ; west of Winchester, Kentucky. 

 C pedicel valve, south of Pleasant Valley, Kentucky. From the 

 Greendale bed. 



Fig. 14. RaHncsquina tt'inchesterensis-filistriata. Interior of brachial valve. 

 Thirteen and a half miles northeast of Paris, Kentucky, measured 

 along the railroad to Carlisle. From the Greendale bed. 



Fig. 15. Rafinesqtiiiia zvinchesterensis-filistriata. A, pedicel valve. B. brachial 

 valve of the same specimen. Clays Ferr3\ on the Kentucky river, 

 in Madison county, Kentucky. From the Greendale bed. 



Fig. 16. Plcctorthis dichotoma (?). A,B, brachial valves. C,D, pedicel valves. 

 West of Dillsboro station, Indiana, about 10 feet below the Platy- 

 strophia ponderosa beds, in the upper Fairmount. 



Fig. 17. Hehertclla alvcata-richmondensis. Brachial valve. Richmond, Indiana, 

 from the same horizon as the type represented by figure 10 on this 

 plate, but with the shell moderately prolonged at the hinge-line. 

 Upper part of Whitewater bed. 



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