PLATE XXVII. 



Tellina (continued). 



Figs. 



1. T. striatuloides, Stol. Upper Greensand, Blackdown. British Museum, 

 No. L 16829. Hinge of right valve, X 2. (P. 172.) 



2-8. T. (Pal&omoera) insequalis, Sow. Upper Greensand, Blackdown. Sedgwick 

 Museum, except fig. 8. (P. 173.) 



2. Eight valve. 



3 a, right valve ; b, part of postero-dorsal area, x 4. 

 4, 5. Left valves. 

 6. Dorsal view. 



7 a, interior of left valve ; b, hinge of same, x 2. 

 8. British Museum, No. L 17129. Hinge of right valve, x 2. 



0. T. (Linear la), sp. Lower Greensand (Crackers), Atherfield. British 

 Museum, No. 48626. Left valve, X If (P. 175.) 



10-13. T. (Linearia) subtenuistriata, d'Orb. Upper Greensand, Blackdown. (P. 

 175.) 



10 British Museum, No. L 7129. a, left valve, x 1-i ; b, dorsal view, x 1£. 



11. Sedgwick Museum. Left- valve, x 1§. 



12. British Museum, No. L 17129. Right valve, X l*. 



13. British Museum, No. L 17129. Hinge of right valve, x 2. 



14—16. T. (Linearia), sp. Upper Greensand, Blackdown. British Museum, No. 

 L 17129. (P. 177.) 



14. Right valve, x 1 \ . 



15. Left valve. 



1(5. Dorsal view, x 1|. 



Genus — Mactra, Lin nseus. 



17, 18. M. sp. Lower Greensand (Ferruginous Sands), Shankliu. Sedgwick 

 Museum. 1 7 a, left valve; 1 7 h, dorsal view. 18, portion near the 

 middle of valve, X 0. (P. 177.) 



19-23. M. angidata, Sow. Upper Greensand, Blackdown. (P. 177.) 



19. Museum of Practical Geology, No. 20714. a, right valve, x l.\; b, dorsal 



view, X 1|. 



20. Sedgwick Museum. Left valve, x 1J. 



21. Sedgwick Museum, a, left valve, x 1| ; b, posterior view of same, X \\. 



22. Sedgwick Museum. Right valve. 



23. Museum of Practical Geology, No. 20717. Hinge of left valve, x 3. 



(! runs — Ptychomya, Agassiz. 

 24-20. 1'. Bobinaldina (d'Orb.). Lower Greensand. Sedgwick Museum. (P. 

 179.) 



24. Perwa-bed, Atherfield. a, right valve ; b, dorsal view. 



25. Perna-bed. Atherfield. Left valve. 



2(3. Ferruginous Sands, Shankliu. Hinge of right valve. 



