PLATE 23 

 Sowerbyella antiqua Jones (p. 130) 



Ffairfach Group, near Llangadog, Carmarthenshire. 

 Fig. 1. BB 35527. Internal mould of a pedicle valve, X47. 

 Fig. 3. BB 35531. Internal mould of a pedicle valve, x 6. 

 Fig. 4. BB 35534. Latex cast of the interior of a brachial valve, x 6-5. 



Sowerbyella cf. antiqua Jones (p. 131) 



Meadowtown Beds, near Meadowtown, Shropshire. 

 Fig. 2. BB 35541a. Latex cast of the interior of a brachial valve, x 6. 

 Fig. 5. BB 35536. Latex cast of the exterior of a brachial valve, x 8-7. 

 Fig. 6. BB 35539. Internal mould of a pedicle valve, x 6. 

 Fig. 7. BB 35540. Internal mould of a pedicle valve, x 5-8. 



Figs. 8, 9. BB 35537a, b. Internal mould and latex cast of the exterior of a pedicle valve, 

 X7-3, X7-9- 

 Figs. 12, 10. BB 35542. Latex cast and mould of the interior of a brachial valve, x8. 

 Fig. 11. BB 35535. Latex cast of the exterior of a brachial valve, x 6. 

 Fig. 13. BB 35538. Internal mould of a brachial valve, x 7. 



Sowerbyella multiseptata sp. nov. (p. 132) 



Spy Wood Grit, near Rorrington, Shropshire. 

 Fig. 14. Paratype, BB 35548b. Latex cast of the exterior of a pedicle valve, x 4-5. 

 Figs. 16, 15. Holotype, BB 35544. Latex cast and mould of the interior of a brachial valve, 

 X6-2. 

 Fig. 17. Paratype, BB 35547a. Latex cast of the interior of a brachial valve, x 6. 

 Fig. 18. Paratype, BB 35546a. Internal mould of a pedicle valve, x 7. 

 Fig. 19. Paratype, BB 35545b. Latex cast of the exterior of a pedicle valve, x 10. 



