PLATE 100. 



1-3. Genocidaris apoda A. Ag. and Cl. 

 1. Side view. X 5. 



Part of actinostome and base of corona. X 9. 



3. Abactinal system. X 7. 



4-6. Prionechinus ruber A. Ag. and Cl. 



4. Side view. X 5. 



5. Part of actinostome and base of corona. X 8. 



6. Abactinal system. X 7. 



