PLATE XXIX. 



Figure 1. Echinolampas Sindensis, d'Archiac (page 159). Abactinal view of the test of a 

 large example, natural size. 



2. Longitudinal profile of the same specimen, natural size. 



3. Abactinal view of a test of ordinary size, natural size. 



4. Actinal view of the same, natural size. 



5. Longitudinal profile of the same, natural size. 



6. Peristome and surrounding parts of the test from another specimen, magnified. 



7. A portion of the ambulacral area, near the middle of a petal, magnified. 



8. Abactinal view of the test of a young specimen, natural size. 



9. Actinal view of the same test, natural size. 



10. Longitudinal profile of the same, natural size. 



11. Echinolampas Sindensis, var. hemisphjerica, Duncan and Sladen (page 163). 



Abactinal view of the test, natural size. 



12. Actinal view of the same, natural size. 



13. Longitudinal profile of the same, natural size. 



14. Longitudinal profile of another specimen, somewhat less tumid, natural size 



15. Longitudinal profile of a large specimen, natural size. 



16. Abactinal view of the test of a small specimen, natural size. 



17. Longitudinal profile of the same, natural size. 



