PLATE 7 

 Orbiculoidea sp. (p. 47) 



Stapeley Shales, Shropshire (unlocated exposure). 

 Fig. 1. BB 35576. Latex cast of the exterior of a brachial valve, x 5. 



Schizotreta transversa sp. nov. (p. 47) 



Meadowtown Beds, near Meadowtown Quarry, Shropshire. 

 Fig. 2. Paratype, BB 35578. Exfoliated pedicle valve, x6-2. 

 Fig. 7. Holotype, BB 35577. Exfoliated pedicle valve, X67. 



Meadowtown Beds, Middleton, Shropshire. 

 Fig. 3. Paratype, BB 35579. Exfoliated brachial valve, xyi. 



Schizotreta sp. (p. 48) 



Mytton Flags, New Perkin's Level, Shropshire. 

 Fig. 4. BB 35580. Latex cast of the exterior of a pedicle valve, x 8. 



Petrocrania dubia sp. nov. (p. 48) 



Whittery Shales, near Hockleton Bridge, Shropshire. 

 Figs. 8, 6, 5. Holotvpe, BB 35405a, b. Latex casts of the exterior and interior and the 

 internal mould of a brachial valve, x 2-6, x 3-5, X 3. 



Hesperonomia sp. (p. 49) 



Mytton Flags, Woodside House, Shropshire. 

 Figs. 12, 9. BB 35334a, b. Latex casts of the external and internal moulds of a brachial 

 valve, x8-3, X5. 



Orthis cf. callactis Dalman (p. 50) 



Mytton Flags, Crowsnest Dingle, Shropshire. 

 Figs. 10, 11. BB 35498a, b. Latex cast of the exterior and the internal mould of a pedicle 

 valve, x 3-6. 



Mytton Flags, near St Luke's Church, Shropshire. 

 Fig. 13. BB 35500. Latex cast of the exterior of a brachial valve, x 8-4. 

 Figs. 15, 14. BB 35497. Latex casts showing dorsal and ventral views of conjoined valves, 



X3-4- 



Fig. 16. BB 35499. View of a fragment of the internal mould of a brachial valve and the 

 external mould of the complementary pedicle valve, X 12-5. 



