PLATE 18 



Echinocythereis (Scelidocythereis) rasilis sp. nov. 



Fig. i. Dorsal view, carapace male, x 68. Paratype, Io. 4278. Lower Chocolate Clays, 

 sample 3499, Rakhi Nala. 



Figs. 2, 3. Dorsal and ventral views, carapace female, x 68. Holotype, Io. 4329. Lower 

 Chocolate Clays, sample 3499, Rakhi Nala. 



Fig. 5. Right view, carapace male, x 68. Paratype, Io. 3131. Upper Chocolate Clays 

 (lower part), sample 24157, Zao River. 



Fig. 7. Right view, carapace female, x 68. Paratype, Io. 3132. Upper Chocolate Clays 

 (lower part), sample 24145, Zao River. 



Echinocythereis (Scelidocythereis) sparsa sp. nov. 



Figs. 4, 6. Dorsal and left views, carapace male, x 68. Paratype, Io. 4279. Upper 

 Chocolate Clays (lower part), sample 24159, Zao River. 



Figs. 8, 9. Dorsal and left views, carapace female, x 68. Holotype, Io. 4330. Upper 

 Chocolate Clays (lower part), sample 24159, Zao River. 



Gyrocythere exaggerata gen. et sp. nov. 



Figs, io, 12. External and internal views, left valve male, x 68. Paratype, Io. 3125. 

 Upper Chocolate Clays (lower part), sample 2415 1, Zao River. 



Figs, ii, 14. External and internal views, right valve male, x 68. Paratype, Io. 3127. 

 Upper Chocolate Clays (lower part), sample 24151, Zao River. 



Fig. 13. Dorsal view, carapace male (specimen now split giving separate valves Io. 3125 + 

 Io. 3127 above). 



