PLATE XIV. 



Pinna {continued). 



FIGS. 



1. P. decussata, Groldf. Right valve. Zone of Belemnitella mucronata, 

 Norwieh. Norwich Museum. This specimen is the type of P. 

 .VI Ira fa, Woodw. (P. 101.) 



Genus — Astaute, Sowerbij. 



2,3. J. elongata, d'Orb. Lower Greensand. Seend. Museum of Practical 

 Geology, Nos. 1:3176, 13181. (P. 102.) 



2 a, right valve ; 2 b, dorsal view. 



3. Internal cast of right valve. 



1- (i. A. subacuta, d'Orb. Lower Greensand (Perna-hed), Last Shalford. 

 Sedgwick Museum. (P. 103.) 



4. Right valve. 



5. Internal mould of right valve, x 1|. 



6. Portion of left valve. 



7-0. .1. sinuata, d'Orb. Lower Greensand (Crackers), Atherheld. Sedgwick 

 Museum. (P. 104.) 



7. Left valve, x H. 



8. Part of left valve. 



9 a, right valve ; b, dorsal view, x 1^. 



10-12. A. upwarensis, Woods. Lower Greensand, Upware. (P. 105.) 



10. Sedgwick Museum. Specimen figured by W. Keeping. a, right valve ; b, 



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



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



12. Mr. J. F. Walker's Collection. Hinge of right valve, x 1L 



13-20. J. senecta, Woods. 13-10. Speeton Clay, Speeton. 17-20. Claxby Iron- 

 stone, Benniworth Havem Sedgwick Museum, except fig. 10 — 

 York Museum. (P. 106.) 



1 3. 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. .1. sp. Speeton Clay, Speeton. Sedgwick Museum, a, right valve ; 

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

 11 21. A. cantabrigiensis, Woods. Lower Greensand, Upware. Sedgwick 

 Museum. (P. 107.) 



22 a, right valve ; b, dorsal view. 



23 a, right valve ; b, anterior view. 

 24. Left valve. 



25-28. A. claxbiensis, Woods. 25. Spilsby Sandstone, Spilsby. 26-28. Claxby 

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

 York Museum. (P. 108.) 

 25 a, left valve ; b, interior ; c, dorsal view. 

 26, 27. Left valves, x 1£. 



28 a, right valve ; b, dorsal view. 



29-36. A. subcostata, d'Orb. 29-35. Atherfield Beds. (P. 109.) 



29. Peasmarsh. Museum of the Geological Society, No. 2181. a, right valve, x 2; 

 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. Perwa-bed, East Shalford. Sedgwick Museum. Left valve, x l£. 



