( 191 ) 



Fig 

 5. 

 6. 



7- 



8. 



9. 

 10, 

 12. 

 13. 

 14. 

 15. 

 16. 



17- 

 18. 

 19. 

 20. 

 21. 

 22. 

 23. 

 24. 

 25. 



Fig 



Cardium incertum. * 26. 



acutangulum. * 27- 



striatulum. 28. 



gibberulum. * 29. 



Variety of modiola aspera. ? 30. 



11. Crassina. 31. 



Mya asquata. * 32. 



Nucula axiniformis. * 33. 



lachryma. 34. 



Pullastra oblita. * 35. 



Gervillia lata. * 36. 



Hinge of ditto. 37. 



Cucullasa reticulata. * 38. 



Nucula variabilis. 39. 



Pecten virguliferus. * 40. 



Mytilus cuneatus. * 41. 



Trochus pyramidatus. * 42. 



Turritella quadrivittata. * 43. 



Lingula Beanii. * 44. 

 Natica tumidula. * (minuta, M. C.) 



Serpula deplexa. * 



Trochus bisertus. * 



Turritella cingenda. 



Mouth of ditto. 



Solarium calix. * 



Turbo laevigatus. 



Nerita costata. 



Auricula Sedgvici. * 



Actaeon humeralis. * 



Natica adducta. * 



Gastrochaena tortuosa. 



Vermicularia compressa. 



Trigonia striata. 



Cardita similis. 



Isocardia concentrica. 



Crassina elegans. 



Unio abductus. * 



Cucullaea elongata (omitted page 156.) 



cancellata. * 



Plate XII. Upper Lias Shale, page 160, 



1. Basal and posterior view of the cranium 4. 



of a small crocodile. 5. 



2. Lateral view of the head of a saurian 6. 

 animal : nostrils in a vertical aperture. ? 7- 



a. intermaxillary bone. 8. 



b. maxillary bone. 9- 



c. nasal bone ? 10. 

 h. posterior frontal bone. 11. 

 i. jugal bone ? 12. 

 k. temporal bone. 13. 

 TO. parietal bone. 



u. dental bone. 14. 



v. angular bone. 15. 

 < opercular bone. 



3. Corbis. 



Nucula ovum. 



Amphidesma donaciforme. * 



rotundatunv* 



Cardium (cast.) 



Nucula complanata * (cast.) 



Sanguinolaria elegans. * 



Unknown lamellated body. 



Actaeon. 



Rostellaria ? 



Plagiostoma pectinoideum (a small spe- 

 cimen.) 



Variety of inoceramus dubius. 



Ammonites crassus (variety, with tu- 

 bercles.) 



