PLATE i 

 Obolus subditivus sp. nov. (p. 25) 



Hope Shales, near Brithdir Farm, Shropshire. 



Figs, i, 3, 2. Holotype, BB 35573a, b. Latex casts of the exterior and interior and the 

 internal mould of a pedicle valve, x 5-6. 



Figs. 5, 6. Paratype, BB 35574a, b. Latex cast of the exterior and the internal mould of 

 a pedicle valve, X 6-3, X5-8. 



Figs. 4, 8, 7. Paratype, BB 35575a, b. Latex casts of the exterior and interior and the 

 internal mould of a brachial valve, X 5-5. 



Obolus sp. (p. 26) 



Mytton Flags, Bergam Quarry, Shropshire. 

 Fig. 9. BB 35581a. Exfoliated pedicle valve, X 4-3. 



Mytton Flags, near Wood House, Shropshire. 

 Fig. 10. BB 35582. Exfoliated brachial valve, X4"5- 



Schmidtites ? simplex sp. nov. (p. 26) 



Rorrington Beds, Holywell Brook, Shropshire. 

 Fig. 11. Holotype, BB 37134a. Internal mould of a pedicle valve, x 8. 

 Fig. 14. Paratype, BB 37138. Internal mould of a brachial valve, x 6-7. 



Rorrington Beds, Deadman's Dingle, Shropshire. 

 Fig. 12. Paratype, BB 37139. Internal mould of a pedicle valve, x 8. 



Rorrington Beds, near the Mount, Shropshire. 

 Fig. 13. Paratype, BB 37136. Exterior of a pedicle valve, xg. 



Rorrington Beds, near Desert, Shropshire. 

 Fig. 15. Paratype, BB 37140a. Internal mould of a pedicle valve, x8-3. 



Schmidtites ? simplex subcircularis sp. et subsp. nov. (p. 27) 



Stapeley Shales, Whitsburn Dingle, Shropshire. 

 Fig. 16. Holotype, BB 37141. Exterior of a pedicle valve, X9-2. 

 Fig. 17. Paratype, BB 37142b. Latex cast of the external mould of a pedicle valve, x 8. 



