PLATE XIV. 

 Pinna {(■(infiniit'd). 



FIGS. 



1. /'. decnssiitd, VxuldL Right valve. Zone of BdemiiiU'lln unifruitntii, 

 Norwicli. Norwich Museum. This specimen is the tv|ie of /'. 

 sidcafit, Woodw. (P. 101.) 



Genua — Astaute, Sotoerhij. 



2,3. .1. eliiiK/iitd, d'Orl). Lower (Ireeusand. Seeud. Museum (jI' Piactic;d 

 Geology, Nos. l:517<i, 13181. (P. lOl!.) 



2 a, ri^ht valvu ; 2 b, dorsal view. 



3. Internal cast of right valve. 



4-(). .1. iiuhacuta, d'Orb. Lower Greeusand (i'c*';/((-bed), East Shalt'ord. 

 Sedgwick Museum. (P. 103.) 



4. Right valve. 



5. Internal mould of right valve, x li. 



6. Portion of left valve. 



7-'.'. .1. sluaatd, d'Orb. Lower Greeusaiid (Crackers), Atherfield. Sedgwick 

 Museum. (P. 104.) 



7. Left valve, x li. 



8. Part of left valve. 



9 a, right valve ; h, dorsal view, x li. 



10-11!. A. II jiirareusis, Woods. Lower Greensaud, IJpware. (P. 105.) 



10. Scilgwick Museum. Specimen figured by W. Keeping, a, right valve; h, 



anterior view ; c, portion near the middle of the valve, x 3. 



11. Sedgwick Museum, a, left valve ; 6, dorsal view. 



12. Mr.' J. F. Walker's Collection. Hinge of right valve, x li. 



13-2*). A. .ienecta, Woods. 13-16. Speeton Clay, Speeton. 17-20. Claxl)y Iron- 

 stone, Benniworth Haven. Sedgwick Museum, exce[)t fig. IG — 

 York Museum. (P. 10(5.) 



13. Left valve. 



14. Right valve. 



15 a, left valve ; b, dorsal view. 

 16-18. Left valves. 

 19, 20. Interiors of left and right valves. 



21. J. sp. Speeton Chiy, Speeton. Sedgwick Museum, ii, riglit valve; 

 h, median part, x 5. (P. 107.) 



22-2-1'. A. caiitahrlij'wnsix, Woods. Ijower Greensaud, Up ware. Sedgwick 

 Museum. (P. 1(I7.) 



22 a, right valve ; h, dorsal view. 



23 a, right valve ; b, anterior view. 

 24. Left valve. 



25-28. .1. cliLvbieiisis, Woods. 25. SpiJsby Saiulstoiie, Spilsby. 20-28. Ckixby 

 Ironstone, Benniworth Haven. Sedgwick Museum, except fig. 27 — 

 York IMuseum. (P. 108.) 

 2.5 a, h'ft valve ; ^j, interior; r, dorsal view. 

 26,27. Left valves, x If 



28 a, right valve ; b, dorsal view. 



29-30. A. subco.itata, d'Ovh. 29-35. Atherfield Beds. (P. 109.) 



29. Peasmarsh. Museum of the (Jeologieal Society. No. 2181. ii. right valve, x2; 

 b, part near the middle of the ventral margin, x 6. 

 30-35. Sevenoaks. British Museum, No. L 9284. 30, 31, 32, 35, right valves, x 2. 

 34, right valve, nat. size. 33, left valve, x 2. 

 36. Ptjnia-bed, East Shalford. Sedi,' wick Museum. Left valve, x 1,^. 



