PLATE 8 

 Orthis sp. (p. 51) 



Stapeley Volcanic Group, Leigh, Shropshire. 

 Fig. 1. BB 35425. Latex cast of the interior of a brachial valve, X6-5. 



Lenorthis cf. proava (Salter) (p. 52) 



Mytton Flags, Snailbeach, Shropshire. 



Figs. 3, 2. BB 35501a, b. Latex cast of the exterior and the internal mould of a pedicle 

 valve, x 6-6, X 3-4. 



Figs. 5, 4. BB 35502a, b. Latex cast of the exterior and the internal mould of a pedicle 

 valve, X3'5. 



Mytton Flags, Perkin's Beach, Shropshire. 

 Figs, 6, 9. BB 35504a. Latex cast and mould of the interior of a brachial valve, x 3-7. 

 Figs, 7, 8. BB 35503a, b. Latex cast of the exterior and interior of a brachial valve, x 3-5. 



Orthambonites exopunctata sp. nov. (p. 53) 



Whittery Shales, near Hockleton Bridge, Shropshire. 

 Figs. 10, 11. Holotype, BB 35371. General and detailed views of the exterior of a brachial 

 valve, x 3-3, X 10. 



Fig. 12. Paratype, BB 35372. Exterior of a brachial valve, X3-2. 



Figs. 13, 16. Paratype, BB 35376a, b. Interior and internal mould of pedicle valve, x 3-1, 



X3-9- 

 Fig. 14. Paratype, BB 35373. Latex cast of the interior of a brachial valve, x 3-5. 



Whittery Shales, Whittery Quarry, Shropshire. 

 Fig. 15. Paratype, BB 35375. Internal mould of a pedicle valve, X4-2. 



Whittery Shales, River Camlad, Shropshire. 

 Fig. 17. Paratype, BB 35374a. Latex cast of the interior of a brachial valve, X4 - 7- 



