LIST OF ILLUSTRATIONS 



FIG. PAGE 



1. Tcrebratula intermedia - - 2 



2. Ornilhella obovata 3 



3. Brachial Loops - - 6 



4. He mithyris psittacea 13 



5. Bathonian Terebratulacea - 21 



6. Lcptcvna rhomboidalis - - 26 



7. Various Brachiopods - 30 



8. Palaeozoic Rhynchonellids - 36 



9. Deltidial Plates of Rhynchonellids 37 



10. Evolution of the Loop in Long-looped Terebratulacea 40 



11. Pcctunculus glycimcris - - 48 



12. Pcduncidus glycimeris - - 49 



13. N licit la - - 53 



14. Trigonia bronni - - 55 



15. Cyrena - - 57 



16. Heterodont Hinges - - 59 



17. Crassatella ponder osa - - 62 



1 8. Meretrix incrassaia - 63 



19. Pseudomonotis echinata - - 65 



20. Ostrea ventilabritin - 67 



21. Corbula gallica - - 70 



22. Pholadomya - 71 



23. Lamellibranchs - - 78 



24. Heterodont Lamellibranchs - - 83 



25. Fixed and Burrowing Lamellibranchs - - * - 87 



26. Emarginula fissura - 96 



27. Turritclla imbricataria - 97 



28. Natica mnltipiinctata - - 100 



29. Cerithium serratum - 102 



