PLATE XXIV. 



Figs. 



1. Cyjyrina daxhiensis, Woods. Claxby Ironstone, Donnington. Sedgwick 

 Musonni. Hinge of right valve. (P. lo-j.) 



Gen us — LuciNA, Brugniere. 



2, 3. L. sp. Si)ilsby Sandstone. 2, internal cast of right valve, Donnington. 

 Sedgwick Museum. 3, right valve, Holton, Mr. Lamplugh's 

 Collection. (P. 152.) 



4, 5. L. s}). Lower Greensand. (P. 152.) 



4. Near Atlierfiekl. Museum of Practical Geology, No. 1071P. Internal cast. 



a, right vaU'e ; h, dorsal view. 



5. Sandgate Bods, Parhain Park. Museum of the Geological Society, No. 2149. 



luterual cast of left valve. 



G. L. sp. Lower Greensand (Ferruginous Sands), Shanklin. Sedgwick 

 Museum, Cambridge, a, left valve; h, dorsal view. (P. 153.) 



7-9. L. ? scnipta, Phill. Gault, Folkestone. (P. 153.) 



7. Museum of Practical Geology, No. 19761. Right valve, x 1^. 



8. British Museimi, No. L 4990. a, part of riglit valve ; h, dorsal view of Kotli valves. 



9. British Museiuu, No. L 4990. Left valve. 



10-14. L. fnicra (iiow.). Gault, Folkestone. (P. 154.) 



10. Sedgwick M\iseum. (7, left valve, X li; ft, portion near middle of valve, x 8. 



11. Sedgwiclv Museum. Eight valve, x 1^. 



12. British Museum, No. L 4977. a, left valve; b, dorsal view; c, portion near 



middle of valve, X 8. 



13. British Museum, No. L 4977. (», left valve, x H; 6, anterior view, x 1'. 



14. British Museum, No. L 4977. Right valve, x IrV. 



15. L.Doinu'si, Woods. Upper Greensand, Blackdown. Museum of Practical 

 Geology, No. 19771. n, left valve; h, dor.sal view; c, portion near 

 middle of valve, X '3. (P. 155.) 



](;-19. L. jmnrii, Sow. Upper Greensand, Blackdown. Sedgwick Museum, 

 Cambridge. 16-18, right valves ; 18 /^ dorsal view ; 1 9, left valve. 

 All X 3. (P. 15G.) 



Genns — Coruicella, Morris nad Li/cetf. 



20-23. G. claxJdensis, Woods. Claxby Ironstone, Benniwortli TIav(>n. Sedgwick 

 Museum, Cambridge. (P. 157.) 



20 a, left valve ; h, dorsal view of the same. 



21. Right valve. 



22. Hinge of right valve, x l^. 



23. Left valve. 



Gciiiis — Srii^iiA, Suirirlii/. 



24. *S'. corrngntn, Sow. TiOwer Greensand (Crackers), Atherfield. Sedgwick 

 Museum. Left valve. See also text-figure 2G. (P. 157.) 



