PLATE XIV. 



Figure 1. Plesiolampas placenta, Duncan and Sladen (page 54). The rudimentary phyllode, 

 magnified. 



2. Plesiolampas pr^longa, Duncan and Sladen (page 56). Actinal aspect of the test, 



natural size. 



3. Apical disk and part o£ the surrounding portion of the abactiual surface, magnified. 



Also a portion of the poriferous zone, more highly magnified. 



4. Plesiolampas ovalis, Duncan aad Sladen (page 58). Actinal aspect of the test, 



natural size. 



5. Portion of the median granular band leading from the peristome to the periproct, 



magnified. 



6. Outline of the longitudinal profile of the test. 



7. Abactinal aspect of another specimen, natural size. 



8. Apical disk and portion of the abactinal surface of another specimen, magnified. 



9. Abactinal aspect of the test of a young specimen, natural size. 



10. Actinal aspect of the same, natural size. 



11. Abactinal aspect of a young specimen, natural size. 



12. Apical disk and surrounding portion of the abactinal surface of the same specimen, 



magnified. 



13. Outline of the longitudinal profile of the same specimen, natural size. 



14. Actinal aspect of the test of a very young specimen, natural size. 



15. Outline of the longitudinal profile of the same specimen, natural size. 



16. Abactinal view of the test of the same specimen, natural size. 



17. Peristome of a specimen one inch in length, magnified. 



18. Apical disk and surrounding portion of the abactinal surface of the test of the same 



specimen, magnified. 



