PLATE VIII. 



Fig. Page. 



1. Pseudomelania vittata '(Phil.). — Eushden. In the Northampton Museum. 77 



2. Ditto ; a cast presumably of the shell. — Garsdon, near Malmesbury. In the Author's 



Collection. 77 



3. Natica punctura (Bean). — Scarborough. In the British Museum (no. G. 16999). 3 a, portion 



magnified (see Plate IX, figs. 10, 11). 79 



4. Natica montreuilensis, Hcb. & Desl.— Scarborough. In the Sedgwick Museum. Back view 



showing colour marking. 4 a, portion magnified. 80 



5. Ditto.— Scarborough. In the Museum of Practical Geology (no. 8657). Front view. 80 



6. Natica chauviniana, D'Orb. Bedford. In the Northampton Museum. 81 



7. Natica sp. (cf. cincta). — Holwell. In the Collection of the Author. 81 



8. Cloughtonia depressa, sp. nov. — Sudbrook. In the Sedgwick Museum. 8a, back view; 8 6, 



front view. 82 



9. Eucyclus armiger (Lycett) . — Sudbrook. In the Sedgwick Museum. Front view. 84 



10. Ditto; cast. Scarborough. In the Museum of Practical Geology (no. 8659). 84 



11. Littorina cassius (D'Orb.). — Scarborough. In the Museum of Practical Geology. Front 



view 11a x 1| ; 11 6, nat. size. 85 



12. Purpurinz ? condensata, Desl. ; young form. — Scarborough. In the Sedgwick Museum. 86 



13. Ditto ; cast. — Scarborough. In the Museum of Practical Geology. 86 



14. Helicocryptus orsus, sp. no v. — Scarborough. In the Sedgwick Museum. 14 a, nat. size; 



14 b, view from above ; 14c, view from below; 14 d, view in front of the aperture. 87 



15. Trochus duplicans, sp. nov., var. a. — Scarborough. In the Sedgwick Museum. 15 a, natural 



15 b, side view, magnified ; 15 c, base magnified. 88 



16. Ditto, var. ft. — Scarborough. In the Sedgwick Museum. 16 a, nat. size; 16 6, 16 c, side 



view and base, magnified. 89 



17. Trochus subglaber, Hudl. — Scarborough. In the Sedgwick Museum. 17a, nat. size; 



17 b, side view, magnified. 89 



18. Trochus strigosus, Lycett ; type. — Scarborough. In the Sedgwick Museum. 18 a, side view ; 



18 b, base, nat. size. 89 



19. Trochus lacuna, sp. nov. — Scarborough. In the Sedgwick Museum. 19 a, side view; 19 6, 



top view ; 19 c base, nat. size. 90 



20. Trochus shiptonensis, sp. nov. — Shipton-on-Cherwell. In the Collection of Mr. Hudleston. 



20 a, nat. size ; 20 6, side view, magnified. , 91 



21. Ataphrus halesus (D'Orb.). Woodford, near Thrapston. In the Collection of Mr. Beeby 



Thompson. 21 a, nat. size; 21 6, front view, magnified. 92 



22. Trochus ? domatus, sp. nov. — Scarborough. In the Sedgwick Museum. 22 a, nat. size ; 



22 6, side view magnified. 91 



23. Pleurotomaria buchiana, D'Orb. ; details of ornament. — Scarborough. In the Museum of 



Practical Geology. 93 



24. Ditto; view of base.— Scarborough. In the Collection of the Author. 93 



25. Pleurotomaria debilis, sp. nov. — Bedford. In the Northamj^tou Museum. 94 



