J. S. GARDNER ON BRITISH CRETACEOUS rATELLID.E ETC. 205 



Fig. 17. Scurria depressa, sp. nov. Same locality. 



Pig. 18. Tectara tenidstriata, Seeley. Gault, Cambridge ; Woodwardiau 



Museum. 

 Figs. 19, 20. Tectum tenuicosta, D'Orb. Gault, '^Folkestone ; Gardner 



collection. 

 Figs. 21, 22, 23. Crepidula gaultina, Buvignier. Gault, Folkestone ; 



Gardner collection. 

 Fig. 24. Pileopsis dubia, sp. nov. Gault, Folkestone ; Gardner collection. 

 Fig. 25. Calyptraa Grayana, Tate. Upper Chalk, Ireland ; Jermyn-street 



Museum. 

 Fig. 26. Helcion, sp. ? Buck Hill, Bedfordshire, probably derived from 



the Kimmeridge Clay. 

 Figs. 27, 28, 29, 30. Calyptrcsa concentrica, sp. nov. Gault, Folkestone. 



Plate VIII. 



Fig. 1. Emarginida neocomiensis, D'Orb. Neocomian specimen from the 



Leckenby collection. Atherfield. 

 Fig. 2. Ditto, side view. 

 Fig. 2 a. Part of same, enlarged. 



Fig. 3. Ditto, specimen from the British Museum. Seend. 

 Fig. 4. Ditto, side view. 



Figs. 5. 6. Specimens from the Jermyn-street Museum. Atherfield. 

 Fig. 6 a. Part of same, enlarged. 

 Figs. 7, 8, 9. Emarginida valangiensis, Pict. & Camp. Neoconrian. Mr. 



Meyer's collection. East Shalford. 

 Figs. 10, 11. Emarginida puncturella, sp. nov. Neocomian. Mr. Meyer's 



collection. 

 Figs. 11 a, lib, lie. The same, enlarged. 

 Figs. 12, 13. Emarginida Gresslyi, Pict. & Camp. Grey Chalk. Gardner 



collection. 

 Figs. 14, 15."' Emarg inula Meyeri, sp. nov. Chloritic Marl, Lyme Eegis. 



Mr. Meyer's collection. 

 Figs. 16, 17. E. Gresslyi. Lower Chalk, Isle of Wight.. Jermyn-street 



Museum. 

 Fig. 18. Ditto. Upper Greensand, Devizes. Jermyn-street Museum. 

 Figs. 19, 20. E. divisiensis, sp. nov. Upper Greensand, Devizes; British 



Museum. 

 Figs. 21, 22. E. sanctce-catharincs, Passy, from the Chloritic Marl of 



Whitemore ; Jermyn-street Museum. 

 Figs. 23, 24. E. ancistra, sp. nov. Upper Greensand, Roundway, near 



Devizes ; British Museum. 

 Figs. 25, 26. E. unicostata, Seeley, MS. Upper Chalk, Norwich ; Wood- 



wardian Museum. 

 Fig. 27. Tectum plana, sp. nov., nat. size. Neocomian. Mr. Meyer's 



lection. 

 Figs. 28, 29. The same, enlarged. 



Plate IX. 



Figs. 1, 2. Cmcibulum giganteian, sp. nov. Neocomian, Hythe ; Gardner 



collection. 

 Figs. 3, A, 5. Anisomyon vectis, sp. nov. Neocomian, Atherfield ; Wood- 



wardian Museum. 

 Figs. 6, 7, 8, 9. Pimcturella antiqua, sp. nov. Upper Greensand, Devizes ; 



British Museum. 

 Figs. 10, 11. Tectum formosa, sp. nov. Lower Greensand, Shanklin. Mr. 



Meyer's collection. 

 Figs. 12, 13. Hipponyx Dixoni, Deshayes. Chalk ; Jermyn-street Museum. 



