PLATE 26 

 Rafinesquina sp. (p. 143) 



Whittery Shales, Whittery Quarry, Shropshire. 

 Fig. 1. BB 35496b. Latex cast of the exterior of a brachial valve, x 5. 



Kjaerina (Hedstroemina) sp. (p. 145) 



Spy Wood Grit, near Rorrington, Shropshire. 

 Fig. 2. BB 35452. Internal mould of a pedicle valve, x i-8. 



Bystromena perplexa gen. et sp. nov. (p. 146) 



Spy Wood Grit, near Rorrington, Shropshire. 

 Figs. 4, 3. Holotype, BB 35363. Latex cast and mould of the interior of a pedicle valve, 

 X3-4. x 4 . 

 Figs. 14, 9. Paratype, BB 35365a. Latex cast and mould of the interior of a pedicle valve, 



X4'5- 



Figs. 10, 5. Paratype, BB 35364a. Latex cast and mould of the interior of a pedicle valve, 

 X6-6, X43. 



Figs. 6, 7. Paratype, BB 35370. Latex cast and mould of the interior of a brachial valve, 

 X7, X5. 



Spy Wood Grit, Spy Wood Brook, Shropshire. 

 Figs, 12, 13. Paratype, BB 35368a. Latex cast and mould of the interior of a brachial 

 valve, x 6. 



Spy Wood Grit, near Middleton Church, Shropshire. 

 Fig. 8. Paratype, BB 35367a. Latex cast of the interior of a brachial valve, x 6. 

 Fig. 11. Paratype, BB 35366a. Internal mould of a pedicle valve, x 7-3. 



