PLATE XXXIII. 



Cardium (continual). 

 Figs. 



1 — 3. G. (Granocardium) proboscideum, Sow. Upper Greensand, Blackdown. 

 Sedgwick Museum, Cambridge. (P. 205.) 



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



2 a, interior of left valve ; b, dorsal view of the same. 



3. Hinge of right valve. 



Genus — Touoasia, Munier-Glialmas. 



4 — 6. T. Lonsdalei (Sow.). Lower Greensand, Stock Orchard, near Came. 

 Internal casts. (P. 207.) 



4. Both valves. Museum of Practical Geology, No. 22720. 



5. Lower valve. Museum of Practical Geology, No. 22721. x ~. 



6. Upper valve. British Museum, No. 88825. 



Genus — Gyropleura, Douville. 



7. G. cornucojpise (d'Orb.). Chloritic Marl, Melbury Park. Museum of 

 Practical Geology, No. 22440. a, right valve; b, posterior view of 

 both valves. (P. 208.) 



8 — 13. G. ineqvirostrattt (Woodw.). Upper Chalk (zone of Belemnitella mucro- 

 nata), Norwich. 8—10, British Museum, No. 21002. 11—13, 

 Norwich Museum. (P. 200.) 



8a, right valve; h, posterior view of both valves; c, ornamentation of right 



valve x 8. 

 9 a, left valve and umbo of right valve ; b, posterior view of both valves. 



10. Ornamentation of right valve near the ventral margin x 12. 



11. Right valve. Internal cast. 



12. Anterior view of both valves. Internal cast. 



13a, left valve and umbo of right valve; b, posterior view of both valves 

 Internal cast. 



