EXPLANATION OF PLATES. 



PLATE I. 



Figs. 1 and 2. Acanthoceras mammillatum, Schloth. 

 Fig. 3. Ostrea Leymeriei, Leym. 



PLATE II. 



Fig. 1. Hoplites Benettianus, J. de C. Sby. 



Figs. 2 and 3. Exogyra sinuata, J. Sby. 

 Figs. 4 and 5. Pleuromya plwata, J. de C. Sby. 

 Fig. 6. Cucullcea carinata, J. Sby. 



PLATE III. 



Fig. 1. Lamna appendiculata, Ag. 



Fig. 2. Synechodus t sp. 



Fig. 3. Hoplites interruptus, Briig. 



Figs. 4, 4a. Actceonina formosa, J. de C. Sby. 



(4a = protoconch). 



Fig. 5. Ringinella inflata, J. de C. Sby. 



Fig. 6. Natica Gaultina, Orb. 



Figs. 7 and 8. Exogyra canaliculata, J. Sby. 

 Fig. 9. Syncyclonema orbicularis, ,). Sby. 



Figs. 10 and 10a. Pecten Galliennei, Orb. 

 (Fig. 10. = sculpture.) 

 Fig. 11. Lima parallela, J. Sby. 



Fig. 12. Inoceramus concentricus, Park. 



Fig. 13. Mytilus subsimplex, Orb. 



Fig. 14. Trigonia aliformis, Park. 



Fig. 15. Trigonia Fittoni, Leym. 



Fig. 16. Trigonia Archiaciana, Orb. 



All the specimens are in the British Museum (Natural History), 

 having been presented by Miss Lowndes. The figures, unless otherwise 

 stated on the plates, are drawn natural size. 



