PLATE 22 



Gyrocythere perfecta sp. nov. 



Figs, i, 2, 5, 9. Left, right, dorsal and ventral views, carapace male, x 68. Paratype, 

 Io. 4281. Lower Chocolate Clays, sample 3499, Rakhi Nala. 



Figs. 3, 4, 7, 8. Left, right, dorsal and ventral views, carapace female, x 68. Holotype, 

 I°- 4335- Lower Chocolate Clays, sample 3499, Rakhi Nala. 



Fig. 6. Muscle scars x 140, right valve male. Paratype, Io. 3 121. Lower Chocolate Clays, 

 sample 3499, Rakhi Nala. 



Fig. 10. Internal view to show radial pore canals, right valve female, x 134. Paratype, 

 Io. 3120. Lower Chocolate Clays, sample 3498, Rakhi Nala. 



Hermanites cracens sp. nov. 

 Fig. 11. Ventral view, carapace, x 70. Holotype, Io. 4336. Gorge Beds, sample 3111, 

 Rakhi Nala. 



