PLATE VI. 



LIMA (continued). 



FIGS. 



1. L. (Mantellum} interlineata, Jukes-Browne. Cambridge Greensand, 

 Cambridge, a, right valve ; 1), ventral part of left valve X 3. (P. 32.) 



2 4. L. (Mantellum) intermedia, d'Orb. Rye Hill Sands, "Warminster. 

 (P. 33.) 



2. York Museum, a, right valve ; b, antero- ventral part x 4. 



3. Brighton Museum. Left valve. 



4. Sedgwick Museum, a, right valve ; b, antero- dorsal view ; c, posterior ear of 



right valve x 4. 



5 7. L. (Mantellum) elongata, Sow. Chalk Marl, Folkestone. (P. 34.) 



5. Mr. J. F. Walker's Collection. Eight valve. 



6. Sedgwick Museum, a, left valve ; b, antero-dorsal view ; c, mid- ventral portion 



x 3. 



7. Sedgwick Museum, a, right valve ; b, antero-ventral part x 8. 



8, 9. L. (Mantellum) elongata, var. echinata, Eth. Sedgwick Museum. (P. 36.) 



8. Totternhoe Stone, Burwell. Left valve. One of the types. 



9. H. subglobosus zone, Burwell. a, left valve; b, antero-ventral portion x 4; c, 



posterior portion x 4. 



10 12. L. (Mantellum) cantabrigiensis, Woods. Sedgwick Museum. (P. 37.) 



10. The type. Cambridge Greensand. a, left valve ; b, posterior portion x 6. 



11. Antero-ventral portion of left valve X 6. 



12. Lower Chalk, Burwell. Eight valve x 1|. 



13. L. (Mantellum) britannica, Woods. Zone of Micraster cor-anguinum, 

 Seaford. Mr. R. M. Brydone's Collection, a, right valve; b, antero- 

 dorsal view X 1^ ; c, portion at antero-ventral margin X 6 ; d, por- 

 tion at postero-ventral margin X 6. (P. 38.) 



14, 15. L. (Mantellum) Reichenbachi, Geinitz. Sedgwick Museum, Cambridge. 

 (P. 39.) 



14. Cenomanian Sandstone, Wilmington, a, left valve ; b, antero-dorsal view. 



15. Chloritic Marl, Chard. Eight valve. 



16. L. (Mantellum), sp. Chloritic Marl, Chardstock. Museum of Practical 



Geology, No. 7896. a, left valve ; b, postero-ventral portion X 6. 

 (P. 40.) 



17. L. (Ctenoides) rapa, d'Orb. Upper Greensand, Haldon. British Museum, 



No. L 15612. a, right valve ; b, median portion a short distance above 

 the ventral margin X 3 ; c, portion near the anterior margin X 5. 

 (P. 40.) 



