PLATE 13 

 Platystrophia cf. major Williams (p. 78) 



Aldress Shales, Ox Wood Dingle, Shropshire. 

 Fig. 1. BB 35586a. Internal mould of a brachial valve, x 7. 



Spy Wood Grit, near Rorrington, Shropshire. 

 Figs. 4, 2. BB 35587a, b. Latex cast of the exterior and the internal mould of a pedicle 

 valve, x6-2. 



Mcewanella sp. (p. 78) 



Whittery Shales, near Hockleton Bridge, Shropshire. 

 Fig. 3. BB 35417. Internal mould of a pedicle valve, X2-i. 

 Fig. 5. BB 35416. Exterior of a pedicle valve, x 2-4. 



Salacorthis costellata gen. et sp. nov. (p. 80) 



Spy Wood Grit, near Rorrington, Shropshire. 

 Figs. 7, 11, 6, 10. Holotype, BB 37153a, b. Latex casts and moulds of the exterior and in- 

 terior of a brachial valve, x 7-6, x 4-9, X 7-6, x 7-6. 



Fig. 8. Paratype, BB 37154. Internal mould of a pedicle valve, X3*i. 



Fig. 12. Paratype, BB 37155. Latex cast of the exterior of a brachial valve, x 3-6. 



Fig. 13. Paratype, BB 37157. Latex cast of the exterior of a brachial valve, x 5-1. 



Spy Wood Grit, Spy Wood Brook, Shropshire. 

 Fig. 9. Paratype, BB 37156. Latex cast of the exterior of a brachial valve, x 6. 



Skenidioides cf. costatus Cooper (p. 82) 



Spy Wood Grit, Spy Wood Brook, Shropshire. 

 Fig. 14. BB 35413. Latex cast of the exterior of a pedicle valve, x 12. 



Whittery Shales, River Camlad, Shropshire. 

 Figs. 16, 15. BB 35409. Latex cast and mould of the interior of a brachial valve, X57, x 7. 



