PLATE III. 



Figure 1. Echinanthus pumilus, Duncan and Sladen (page 13). Abactinal aspect of the test, 

 natural size. 



2. Longitudinal profile of the same^ natural size. 



3. Transverse profile of the same, showing the posterior extremity, natural size. 



4. One of the ambulacral petals, magnified. 



5. The two posterior phyllodes of the floscelle, magnified. 



6. Longitudinal profile of another specimen, natural size. 



7. Transverse profile of the same, showing the posterior extremity, natural size. 



8. Actinal aspect of another specimen, natural size. 



9. Portion of the margin of the peristome of the same, showing the oral termination of the 



ambulacra and the formation of the phyllode, denuded of ornament, magnified. 



10. Actinal aspect of another specimen, natural size. 



11. Portion of the margin of the peristome of the same, seen obliquely, denuded of ornament, 



magnified. 



12. Abactinal aspect of the test of a small specimen with well-developed keel, natural size. 



13. Longitudinal profile of the same, natural size. 



14. Transverse profile of the same, showing the posterior extremity, natural size. 



15. Abactinal aspect of the test of a small specimen, natural size. 



16. Abactinal aspect of the test of a still smaller specimen, natural size. 



17. Three odd anterior ambulacra, magnified. 



