PLATE L. 



Figure 1. CtYPEASTER profundus (d^'Archiac), Duncan and Sladen (page 319). Abactinal yiew of 

 the test, natural size. 



2. Longitudinal profile of the same, natural size. 



3. An ambujacral petal, magnified. 



4. Ornamentation of the interradial plates on the abactinal surface, magnified. 



5. Clype ASTER PULVINATUS, Duncan and Sladen (page 322). Abactinal view of the test, 



natural size. 



6. Longitudinal profile of the same, natural size. 



7. Clypeaster PELviFORMis, Duucan and Sladen (page 324). Abactinal view of a small 



test, natural size. 



8. Longitudinal profile of the same, natural size. 



9. Actinal view of a larger test, natural size. 



10. Clypeaster complanatus, Duncan and Sladen (page 325) . Abactinal view of the test, 



natural size. 



11. Actinal view of the same, natural size. 



