522 The Ohio Naturalist. [Vol. IX, No. 7, 



Schizodiis sp. (Fig. 8). The generic reference of the specimen 

 referred to this genus is not known to be correct, the cardinal 

 margin being imperfectly preserved. The shell has a general 

 resemblance to Schizodiis ciineus. In the thin representative of 

 the Bedford-Berea at Indian Fields, Kentucky. 



Another specimen of doubtful generic affinities (Fig. 9). bears 

 some slight resemblance in outline to the species described by 

 Hall as Lumdicardium fragile, but there is no trace of radiating 

 striae and the species may belong to an entirely different group 

 of lamellibranch shells. In the thin representative of the 

 Bedford-Berea at Indian Fields, Kentucky. 



EXPLANATION OF PLATE XXVII. 



Fig. 1. Schiichertella morsci. A, brachial valve. B, pedicel valve. 

 C, cardinal area of pedicel valve. D, elevation of deltidium over cardinal 

 area. E, transverse section with pedicel valve on the right. Outline 

 drawing indicating natural size of the specimens. Irvine, Kentucky. 

 Bedford-Berea. 



Fig. 2. Ambocodia norwoodi. A, brachial valve. B, pedicel valve. 

 C, outline of shell on lateral view. Also an outline drawing indicating the 

 natural size of the shell. Irvine, Kentucky. Bedford-Berea. 



Fig. 3. Niicidana sp. Right valve. Indian Fields, Kentticky. 

 Bedford-Berea. 



Fig. 4. Cypricardclla {Microdon) sp. Right valve, lower anterior 

 outline slightly restored. Size of shell indicated by central cross. Indian 

 Fields, Kentucky. Bedford-Berea. 



Fig. 5. Cypricardella {Microdon) sp. Left valve. Extreme anterior 

 outline restored. Significance of posterior impression unknown; it is not 

 fotmd in other .specimens. Indian Fields, Kentucky. Bedford-Berea. 



Fig. 6. Nuculana kentuckiensis , sp. nov. Right valve, posterior 

 extremity restored. Indian Fields. Kentucky. Bedford-Berea. 



Fig. '7. Lingnla irvinensis, with outline drawing indicating the 

 natural size of the specimen. Irvine, Kentucky. Bedford-Berea. 



Fig. 8. Schizodiis sp. Generic reference uncertain. Right valve, 

 cardinal outline not preserved. Indian Fields, Kentucky. Bedford-Berea. 



Fig. 9. Generic reference uncertain. Left valve. Indian Fields, 

 Kentucky. Bedford-Berea. 



Fig. 10. Chonctcs sp. Brachial valve, interior, natural size indi- 

 cated by outline drawing. Indian Fields, Kentucky. Bedford-Berea. 



Fig. 11. Camarotocchia sp. Cast of brachial valve with groove indi- 

 cating position of median septum. Shell distorted. Six plications on the 

 low median fold. Indian Fields, Kentucky. Bedford-Berea. 



Fig. 12. Orbicnloidca sp. A, brachial valve, with the impression of 

 the interior at the aj^ical end. B, outline of valve on lateral view. Outline 

 drawing indicating the natural size of the valve. Indian Fields, Ken- 

 tucky. Bedford-Berea. 



Fig. 13. Orbicnloidca s\). Corresponding drawings of a species found 

 at Irvine, Kentucky. Bedford-Berea. 



Fig. 14. Camarotocchia kentuckiensis. A, B, pedicel valves. C, 

 brachial valve. All casts of interiors. Indian Fields, Kentucky. Bedford- 

 Berea. 



Fig. 15. jMacrodon- hamiltoniae- irvinensis. A, left valve. B, right 

 valve. C, outline drawing to indicate the convexity of the shell. Irvine, 

 Kentucky. Bedford-Berea. 



Fig. 16. Schiichertella herricki. A, B, brachial valves. C,_ pedicel 

 valve, showing the cardinal area and deltidium; specimen distorted. 

 Indian Fields, Kentucky. Bedford-Berea. 



