Figures 



1-2. Cytherella sp. (p. 8) 



1. Right valve, exterior, x 55, Loc. B, U.S.N.M. 128897 



2. Right valve, interior, x 61, Loc. A, U.S.N.M. 128898 

 3-5. Cytherella tuberculifera Alexander (p. 7) 



3. Left side view, complete specimen, x 63, Loc. A, U.S.N.M. 128890 



4. Right valve, exterior, x 60, Loc. A, U.S.N.M. 128891 



5. Dorsal view, complete specimen, x 54, Loc. A, U.S.N.M. 128892 

 6-7. Cytherella bullata Alexander (p. 7) 



6. Right side view, complete specimen, x 50, Loc. J, U.S.N.M. 128887 



7. Left side view, complete specimen, x 52, Loc. G, U.S.N.M. 128888 

 8-11. Cytherella herricki Brown, n. sp. (p. 8) 



8. Left side view, holotype, x 56, Loc. A, U.S.N.M. 128893 



9. Right side view, paratype, x 54, Loc. A, U.S.N.M. 128894 



10. Left valve, interior, x 62, Loc. C, U.S.N.M. 128895 



11. Dorsal view, paratype, x 52, Loc. A, U.S.N.M. 128896 



12. Cytherella ovata (Roemer) (p. 7) 



Left side view, complete specimen, female, x 55, Loc. F, U.S.N.M. 

 128889 



13-15. Cytherelloidea (?) cuneiforma Brown, n. sp., (p. 8) 



13. Left side view, paratype, x 56, Loc. A ; U.S.N.M. 128902 



14. Right side view, holotype, x 59, Loc. A, U.S.N.M. 128903 



15. Dorsal view, paratype, x 57, Loc. C, U.S.N.M. 128904 

 16-19. Cytherelloidea swaini Brown, n. sp. (p. 8) 



16. Ventral view, holotype, x 63, Loc. A, U.S.N.M. 128899 



17. Left side view, holotype, x 60, Loc. A, U.S.N.M. 128899 



18. Left side view, paratype, x 57, Loc. E, U.S.N.M. 128900 



19. Dorsal view, paratype, x 56, Loc. A, U.S.N.M. 128901 

 20, 21, 25. Cytherelloidea inflata Brown, n. sp. (p. 10) 



20. Right side view, holotype, x 66, Loc. E, U.S.N.M. 128914 



21. Dorsal view, paratype, x 65, Loc. E, U.S.N.M. 128915 



25. Left side view, paratype, x 64, Loc. E, U.S.N.M. 128916 

 22, 23, 26, 29. Cytherelloidea greenensis Brown, n. sp. (p. 9) 



22. Dorsal view, paratype, x 63, Loc. A, U.S.N.M. 128908 



23. Right side view, holotype, x 63, Loc. A, U.S.N.M. 128909 



26. Right side view, paratype, x 60, Loc. A, U.S.N.M. 128910 

 29. Ventral view, holotype, x 62, Loc. A, U.S.N.M. 128909 



24, 27, 28. Cytherelloidea andrewsi Brown, n. sp. (p. 9) 



24. Left side view, paratype, male, x 59, Loc. C, U.S.N.M. 128911 



27. Left side view, holotype, female, x 55, Loc. A, U.S.N.M. 128912 



28. Dorsal view, paratype, male, x 61, Loc. C, U.S.N.M. 128913 



