PLATE 19 

 Tissintia immatura (Williams) (p. 109) 



Meadowtown Beds, Meadowtown Quarry, Shropshire. 

 Figs. 1,2,5. B 35478a, b. Latex casts of the exterior and interior and the internal mould 

 ol a hiaci ; -l v , X3-8, X3"5, X2-5. 



Meadowtown Beds, Minicop Farm, Shropshire. 

 Figs. 3, 4. BB 35475a, b. Latex cast of the exterior and the internal mould of a brachial 

 valve, X2-5. 



Salopia sp. (p. 114) 



Whittery Shales, Whittery Quarry, Shropshire. 

 Figs. 9, 6. BB 35428a, b. Latex cast of the exterior and the internal mould of a brachial 

 valve, X4'6, X 3-5. 



Fig. 8. BB 35429a. Internal mould of pedicle valve, x 2-9. 



Whittery Shales, near Hockleton Bridge, Shropshire. 

 Fig. 7. BB 35430a. Internal mould of pedicle valve, X 3. 



Salopia cf. salteri (Davidson) (p. 114) 



Spy Wood Grit, near Rorrington, Shropshire. 

 Figs. 10, 11. BB 35426a. Latex cast and mould of the interior of a brachial valve, X4'2, 

 X5- 



Oslogonites ? sp. (p. 115) 



Mytton Flags, near Wood House, Shropshire. 

 Figs. 12, 13. BB 35326a, b. Latex cast of the exterior and the internal mould of a brachial 

 valve, x 10. 



Kullervo sp. (p. 115) 



Meadowtown Beds, near Meadowtown Chapel, Shropshire. 

 Figs. 15, 14. BB 35340a, b. Latex cast of the exterior and the internal mould of a pedicle 

 valve, x8, X5'5. 



Triplesia sp. (p. 116) 



Whittery Shales, near Hockleton Bridge, Shropshire. 

 Fig. 16. BB 35408. Internal mould of a pedicle valve, x 2-5. 



Bicuspina subquadrata sp. nov. (p. 117) 



Whittery Shales, Whittery Quarry, Shropshire. 

 Fig. 17. Paratype, BB 35481b. Latex cast of the exterior of a brachial valve, x 2-1. 

 Fig. 19. Paratype, BB 35483. Internal mould of a brachial valve, x 1-9. 



Whittery Shales, River Camlad, Shropshire. 

 Fig. 18. Holotype, BB 35480a. Internal mould of a pedicle valve, x i-6. 



