PLATE VI. 



Figure 1. Salenia BlanfoedIj Duncan and Sladen (page 29). The test, side view^ natural size. 



2. The apical system and upper surface of the test^ magnified. 



3. A larger specimen showing the actinal surface^ slightly magnified. 



4. The abactinal surface, magnified. 



5. A specimen, natural size. 



6. A portion of an ambulacrum, magnified. 



7. Three plates in the interradium with tubercles, magnified. 



8. A young specimen, magnified. 



