PLATE XXXII. 



Protocardia (continued). 

 Pigs. 



1 — 6. P. Hillana (Sow.). Upper Greensand, Blackdown. Sedgwick Museum, 

 Cambridge. (P. 107.) 



1. Left valve. 



2, 3. Eight valves. 



4. Interior of left valve. 



.5. Hinge of right valve. 



6. Dorsal view of both valves. 



Genus — Cardium, Linnaeus. 



7 — 10. G. Ibbetsoni, Forbes. Lower Grreensand (Crackers), Atherfield. Sedg- 

 wick Museum, Cambridge. (P. 201.) 



7 a, right valve ; b, dorsal view of both valves ; c, posterior view ; d, anterior 

 view; e, portion of ornamentation of posterior area x 4; /, ornamentation 

 near the middle of the ventral border x 4. 

 8, 9. Right valvos. 

 10. Loft valve. 



11. G. Coital dinum, d' 'Orb. Lower Greensand, Upware. Sedgwick Museum. 



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

 d, ornamentation of posterior area X 4 ; r, ornamentation near the 

 mid-ventral border X 4. (P. 203.) 



12. G. sp. Lower Greensand, Seend. Museum of Practical Geology, No. 



21273. a, right valve; b, dorsal view. (P. 201.) 

 13 — 15. G. turonien.se, Woods. Chalk Rock, Cuckhamsley. Sedgwick Museum. 

 (P. 204.) 



13 a, internal cast of right valve x 1| ; h, anterior view of the same x H. 



14. Internal cast of left valve x l\. 



15. Ornamentation drawn from a wax mould of an external cast x 6. 



16. G. sp. Chalk Pock, Cuckhamsley. Sedgwick Museum. Internal cast. 



a, right valve ; b, dorsal view of both valves. (P. 205.) 



17. G. sp. Upper Chalk (zone of Belemnitella mucronata), Norwich. British 



Museum, No. L19413. Internal cast, a, left valve; b, dorsal view 

 of both valves ; c, posterior view. (P. 205.) 



18, 19. G. (Granocardium) proboscideum, Sow. Upper Greensand, Blackdown. 

 Sedgwick Museum. (P. 205.) 



18. Right valve. The anterior marginal part is drawn from another specimen. 



19. Left valve. Dorsal part decorticatcil. 



