PLATE I 



Page. 



LUNULIOARDIOM GBAJSI>E,n. Bp 5 



Fig. 1. Right valve. 



Pig. 2. Left valve of another specimen. 



Fig. 3. Anterior view of same 



BLAIBELLA 8EUALIEN8IS,U. 8p. .. . 7 



Fig. 4. View of binge line. 



Fig. 5. Outside of the same shell. 



Fig. 6. Right valve of a cast. 



Fig. 7. Right valve of another cast . 



Fig. 8. Cardinal view of the same specimen . 



Edmundia aLbebsi, n. sp 8 



Fig. 9. Right valve. 



Fig. 10. Left valve of another specimen. 



Fig. 11. Cardinal view of same . 



Ch.enomya longa, n. sp 8 



Fig. 12. Cardinal view. 

 Fig. 18. View of left valve. 



M A.CRODON FACETUS, n. Sp ID 



Fig. 14. Cardinal view. 

 Fig. 15. Right valve. 



Fig. 16. Surface of the cast, magnified six diameters. 



POBIDONOMYA I.A8ALLENSIS, n. 8p 12 



Fig. 17. Left valve. 



Fig. 18. Same magnified two diameters. • 



