PLATE XXVI. 



Cypliosomas from the Upper White Chalk. 



Fig. 1 a, h, c. Cyphosoma Konigi. Spoon-shaped spines, magnified. The Rev. T. 



Wiltshire, E.G.S. 



2. „ „ Club-shaped spine, do. Do. 



3 a, h. „ „ Awl-shaped spine, magnified six times. Do. 



4, 5, 6. „ „ Conical and spoon-shaped, do. Do. 



Fig. 7 a. Cyphosoma corollare, Klei7i. Test, natm'al size. British Museum. (P. 134.) 



7 b. „ „ Upper third of an ambulacrum, magnified six 



times. 



7 c. „ „ Inter-ambulacral plates, do. do. 



8 a. „ „ Upper surfaceof another test, magnified twice, do. 



8 d. „ „ Lateral view of do., do., do. 



9. „ „ Under surface of do., do., do. 



10. „ „ Ambulacral area, magnified six times. The 



Rev. T. Wiltshire, F.G.S. 



