Plate 6 



Figures 



1-2. Orthonotacy there tarewsis Brown, n. sp. (p. 24) 



1. Left side view, holotype, female, x 63, Loc. I, U.S.N.M. 129035 



2. Dorsal view, paratype, male, x 59, Loc. H, U.S.N.M. 129036 

 3-5. Orthonotacy there hannai (Israelsky) (p. 24) 



3. Left side view, x 62, Loc. D, U.S.N.M. 129032 



4. Right side view, x 61, Loc. D, U.S.N.M. 129033 



5. Ventral view, x 59, Loc. E, U.S.N.M. 129034 

 6-8. Orthonotacy there sulcata Brown, n. sp. (p. 23) 



6. Right valve, exterior, paratype, x 65, Loc. G, U.S.N.M. 129029 



7. Left side view, holotype, x 62, Loc. G, U.S.N.M. 129030 



8. Ventral view, paratype, x 64, Loc. G, U.S.N.M. 129031 

 9, 11. Loxoconcha seravhae Brown, n. sp. (p. 23) 



9. Left side view, holotype, x 63, Loc. C, U.S.N.M. 129027 



11. Right side view, paratype, x 58, Loc. C, U.S.N.M. 129028 

 10. Loxoconcha neusensis Brown, n. sp. (p. 23) 



Left side view, holotype, x 58, Loc. E, U.S.N.M. 129026 



12-13. Cytheropteron (Cytheropteron) penderensis Brown, n. sp. (p. 20) 



12. Right valve, exterior, paratype, x 66, Loc. C, U.S.N.M. 129000 



13. Left valve, exterior, holotype, x 60, Loc. A, U.S.N.M. 129001 

 14-15. Cytheropteron (Eocytheropteron) straillis Brown, n. sp. (p. 20) 



14. Left valve, exterior, paratype, x 61, Loc. D, U.S.N.M. 129002 



15. Right valve, exterior, holotype, x 60, Loc. F, U.S.N.M. 129003 

 16-17. Cytheropteron (Eocytheropteron) striatum Brown, n. sp. (p. 20) 



16. Left side view, holotype, female, x 66, Loc. G, U.S.N.M. 129004 



17. Right side view, paratype, male, x 64, Loc. K, U.S.N.M. 129005 

 18-19. Cythcrura glessensis Brown, n. sp. (p. 25) 



18. Right side view, holotype, x 59, Loc. A, U.S.N.M. 129037 



19. Left side view, paratype, x 57, Loc. A, U.S.N.M. 129038 

 20-21. Eucythcrura curta (Jennings) (p. 25) 



20. Left side view, x 63, Loc. D, U.S.N.M. 129039 



21. Right side view, x 65, Loc. E, U.S.N.M. 129040 

 22-25. Platycythereis costatana angula (Schmidt) (p. 15) 



22. Left side view, x 59, Loc. A, U.S.N.M. 128958 



23. Right side view, x 55, Loc. A, U.S.N.M. 128959 



24. Ventral view, x 54, Loc. C, U.S.N.M. 128960 



25. Dorsal view, x 61, Loc. C, U.S.N.M. 128961 



