PLATE II. 



Paok 



(K8HIK.*:, n. 8p ' 14 



Left valve. 



Left valve of another specimen. 



Part of another left valve. 



Anterior cast of ri^ht valve. 



Anterior end of left valve. 



Pnrt of surface of Bhell inagniQed foor diameters. 



LlOPTKlUA BOBOVATA, n. Bp. i;^ 



Fig. 7. Left valve. 



Pig. 8. Hight valve of another 8pecimen. 



c'ig. '9, Left valve of another specimen. 



LlOPTEKlA SI'ECIOSA, U. Sp 13 



Klg. 10. Left valve. 



ElYMCLLA MLSaOURIENSIB, U. Sp I.'. 



Kij;. 11. Left valve. 



Ki^. 12. t^ardinal view of a rant. 



PaI.JCOBOLEN OCCIDENTAU8. n. 8p IC 



Fig. 13. Cardinal view. 

 Fig. 1-L View of left valve. 



SrillZODUS eEDALIEN8I8, D. Sp ' 17 



Klg. 15. Cardinal view. 

 Fig. 16. View of right valve. 



MaCKODON TETTISENSIS, U. ep 1(1 



Fig. 17. Kighl valve. 



Fig. 18. Right valve of a larger specimen. 



MaORODON BLAIRI, D. gp :. 



Fig. 1ft. Right valve. 

 Left valve. 



Left valve of a email specimen. 

 Cardinal view. 

 Left valve ot same. 

 Left vulve of a medium eized specimen. 



CyI'IIICAUOKLLA EXIMIA, 0- 8p IJ 



Fig. 25. Left valve. 



LUNULICARDIt'M RKTR0K8UM, n. 8p t> 



Fig. 36. Right valve. 



Fig. 27. Left valve of a smaller specimen. 

 Fig. 28. Cardinal view of same. 



SlMIENOTDS flINUATUfl, n. 8p «j 



Fig. *-i9. Right valve. 



Fig. .10. Left valve of n smaller specimen. 



MURCHISONIA INDIANENSie, n. Bp 1(J 



Pip. 81. Lateral view. 



Fig. 32. Part of enrface miignified, 



Ho]X)rEA URANIMS, n. sp 19 



Fig. 33. Basal view. 

 Fig. 34. I^ateral view. 



STKArAitoLi.us Miesi>rRiE:«8if*, n fp ,,, 2»i 



Fig. 35. View of a nearly entire Hpeclmen. 

 Fig. 36. View of a larger specimen. 



