PLATE II. 



Fia. 



1 . Estkeria minuta. — Left valve, well-preserved ; Pendock, Woreestersbire : X 6 diam. 



2. ,, „ Dorsal profile of the same : X 6 diam. 



3. „ „ Portion of the surface of the same : X 50 diam. 



4. ,, ,, Right valve ; Somerton, Somersetshire : X 6 diam. 



5. ,, „ Left valve ; Shrewley, Warwickshire: X 6 diam. 



6. ,, „ Dorsal profile of the same : X 6 diam. 



7. ,, ., Portion of the surface of the same : X 50 diam. 



8. ,, „ Portion of the surface of a specimen from Prome, Somersetshire, 



showing a smaller reticulation : X 50 diam. 



9. Estkeria minuta, v&r. Brodieana (p. 66). — Right valve ; Linksfield, Elgin: X 6 diam. 



10. „ „ „ Portion of the surface of the same : 



X 50 diam. 



11. „ „ Portion of the surface of another specimen, 



from the same place, showing a more 

 linear reticulation : X 50 diam. 



12. ,, ,, „ Right valve; Wainlode, Gloucestershire: 



X 6 diam. 



13. ,, ,, ,, Dorsal profile of the same: X 6 diam. 



14. ,, ,, „ Left valve, from the same place : X 6 diam. 



15. „ ,, „ Portion of the surface of another speci- 



men, from the same place : X 50 diam. 



16. Estheria Mangaliensis (p. 78). — Left valve; Mangali, Central India : X 6 diam. 



17. „ „ Portion of the surface : X 25 diam. 



18. ,, ,, Portion of an interspace : X 100 diam. 



19. „ ,, Portion of the surface where the ridges are lost 



in overlapping laminae : 100 diam. 



20. „ „ Right valve of a subquadrate individual : X 6 diam. 



21. >, „ Left valve of a young individual, ovate-oblong : 



X 6 diam. 



22. „ „ Right valve of a young individual, subovate : X 6 



diam. 



23. ,, ,, Right valve of a young individual, subquadrate 



or suborbicular : X 6 diam. 



24. Est fieri a Kotahensis (p. SI).— Left valve; Kotah, on the Pranhita, Central India: 



X 6 diam. 



25. „ „ Portion of surface : 100 diam. 



26. Estheria ovata (p. 84).— Right valve of a youngish individual ; Prince Edward, 



near Richmond, Virginia : X 6 diam. 



27. „ „ A pair of valves (somewhat restored) ; Prince Edward, 



Richmond : X 6 diam. 



28. „ „ Right valve ; Harding's pit, near Richmond, Virginia : 



X 6 diam. 



29. „ „ Portion of the surface of the same: X 50 diam. 

 3°- •> » Portion of the surface of the same: X 100 diam. 

 31—38. „ Portions of the surface: X 50 diam. Figs. 31, 32, 33, 



36, and 38, are from Richmond ; figs. 34, 35, and 

 37 are from Dan River. 

 39. Estheria tenet/a {\). 31).— Right valve; Lanarkshire: X 6 diam. (For its orna- 

 ment, see PI. V, fig. 7.) 



