566 



PROCEEDINGS OF THE GEOLOGICAL SOCIETY. 





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Ammonites younff form^ 













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— clavatus 

























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Nautilus striatus, Sow 



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 1 



— intcrmodius Sow , 

















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Greoteuthis . 

















FisL-remair s of many species 























Ichthyosaurus platyodon „ 



Plesiosaurus rugosus 



EXPLANATION OF PLATES XIY.-XYII. 



{Illustrative of Fossils from the Lower Lias.) 



Plate XIY. 



Fig. 1. Fleuratella prima, spec. nov. : front view, enlarged. 



2. : back view, enlarged. 



3. : upper surface, enlarged. 



4. Pterocheilos primus, spec. nov. : front view, 



5. : back view. 



6. Fusus Jenynsii, spec. nov. : back view. 



7. : front view. 



8- Terquemi, spec. nov. : front view. 



y. Cerithium nodulosum, spec. nov. : natural size. 



10. planicostatum, spec. nov. ; front view. 



11. pellucidum, spec. nov. 



12. spiratum, spec. nov. : front view. 



13. pentacostcB, spec. nov. : front view. 



14. Turritella Howsei, spec. nov. : front view. 



15. Littorina circularis, spec. nov. ; front view. 



16. • : back view. 



17. ovalis, spec. nov. : back view. 



18. : front view. 



19. Melania Dunravenensis, spec. nov. : front view. 



20. acuta, spec. nov. : front view. 



21. : back view. 



22. NerincBa acuminata, spec. nov. : front view. 



23. Tudis, spec. nov. : back view. 



24. Alaria rudis, spec. nov. : front view. 



25. fusiformis, spec. nov. : back view. 



Plate XV. 



1. Helix Dawsoni, spec. nov. : upper surface, enlarged. 



2. : profile, enlarged. 



3. Proserpina Lyelli, spec. nov. : base, showing aperture and teeth on lip, 



much enlarged. 

 4. : upper surface, much enlarged. 



