J. S. GARDNER ON THE CRETACEOUS DENTALIBLE. 65 



Fig. 13. I Dentalium medium, nat. size. Blackdown. 



Fig. 13 a. „ „ ornament, enlarged. Blackdown. 



Fig. 14. t „ „ nat. size. Blackdown. 



Fig. 15. t „ divisiense, nat. size. Devizes. 



Fig. 16. „ alatum, nat. size. Folkestone. 



Fig. 16 a. ,, „ ornament, enlarged. Folkestone. 



Fig. 17. „ „ nat. size. Folkestone. 



Fig. 18. „ ,, section near the aperture. Folkestone, 



Fig. 19. „ „ section near the centre. Folkestone. 



Fig. 20. „ ,, section near the apex. Folkestone. 



Fig. 21. t ,, cylindricum, nat. size. Blackdown. 



Figs. 22, 23. \ „ „ nat. size. Blackdown. 



Fig. 24. \ ,, „ section at apex, slightly enlarged. Black- 



down. 



Fig. 25. X » >' section at aperture, slightly enlarged. Black- 



down. 



Figs. 26-29. ,, Jeffrey si, nat. size. Folkestone. 



Fig. 26 a. ,, ,i ornament, enlarged. Folkestone. 



Fig. 30. ## ,, ,, nat. size. Atherfield. 



Figs. 31-33. * „ „ nat. size. Folkestone. 



Figs. 34-39. ,, acuminatum, nat. size. Folkestone. 



Fig. 40. \ Entalis Meyeri, nat. size. Blackdown. 



Fig. 40 a. „ „ apex, enlarged to show slit. Blackdown. 



Figs. 41-44. Siphodentalium affine, nat. size. Folkestone. 



Fig. 43 a. ,, ,, twice nat. size. Folkestone. 



Fig. 43 b. „ „ section, enlarged. Folkestone. 



Fig. 43 c. „ „ convex surface, magnified. Folkestone. 



Figs. 45-47. t , curvum, nat. size. Folkestone. 



Fig. 47 a. „ „ enlarged. Folkestone. 



Fig. 47 b. „ „ section, enlarged. Folkestone. 



Fig. 47 c. „ „ portion, enlarged to show transverse striae. 



Folkestone. 



Fig 48. Cadulus gaultinus, nat. size and enlarged. Folkestone. 



Q. J. G. S. No. 133. 



