PLATE I. 



{Nummulitic Series.) 



Figure 1. Echinolampas alta, Duncan and Sladen (page 19). Side view, natural size. 

 3. Actinal view, natural size. 



3. Apical systenij magnified twice. 



4. Peristome, magnified. 



5. End of antero-lateral ambulacrum, magnified. 



6. Ornamentation of an ambulacrum, magnified. 



7. Variety (page 22) . Actinal surface, natural size. 



8. Echinolampas Fbddeni, Duncan and Sladen (page 33). Side view, natural size. 



9. Abactinal view, natural size. 



10. Ambulacrum, part of, magnified. 



11. A postero-lateral ambulacrum, magnified. 



