PLATE XXIX. 



Ctpeimeria {continued). 



Figs. 



1 — 3. G. (Gyclorisma) parva (Sow.). Lower Greensand (Crackers), Atherfield, 

 except fig. 3. Sedgwick Museum, Cambridge. (P. 184.) 



1 a, left valve; b, anterior view of the same specimen. 



2. Hinge of left valve x 3. 



3. Perna-bed, East Shalford. Internal cast of left valve. 



4 — 6. G. (Gyclorisma) rotomagensis (d'Orb.). 4, 5, Chloritic Marl. (P. 186.) 



4. Woolcombe. Museum of Practical Geology, No. 18735. Eight valve, with 



part of the shell preserved. 



5. Maiden Bradley. Museum of Practical Geology, No. 1874(3. a, internal 



cast of right valve ; h, dorsal view of the same specimen. 



6. Cenomanian, Eouen. M. Fortin's Collection. Left valve with shell 



preserved. 



7 — ]5. G . (Gyclorisma) faoa (Sow.). Upper Greensand, Blackdown. Sedgwick 

 Museum, except figs. 11, 14, 15. (P. 187.) 



7 — 9. Eight valves. 



10. Hinge of right valve x 2. 



11. Left valve. Museum of Practical Geology, No. 19774. 



12. Dorsal view of both valves. 



13. Hinge of left valve x Ih. 



14. The Type of Venus sublsevis, Sow. Bristol Museum. (P. 189.) 



15. The Type of Venus immersa, Sow., somewhat crushed. Bristol Museum. 



Genus — Clementia, Gray. 



16 — 18. G. (Flu v rutin) Bicordeana (d'Orb.). Lower Greensand (Perna-bed), 

 Atherfield. Sedgwick Museum. 16, 17, right valves; 18 a, left 

 valve ; h, dorsal view of the same specimen — the lunule is drawn 

 from another specimen. (P. 189.) 



19 — 2G. G. (Flaventia) oralis (Sow.). Upper Greensand, Blackdown. Sedgwick 

 Museum, Cambridge, except figs. 20, 23, 2G. (P. 191.) 



19—22. Eight valves. 20, Museum of Practical Geology, No. 19778. 



23. British Museum, No. L19444. Interior of right valve. 



24. Hinge of right valve x H. 



25 a, left valve ; b, dorsal view of the same specimen. 



26. Museum of Practical Geology, No. 19814. Hinge of left valve x H. 



