PLATE 104. 

 1-3. Heliocidaris stenopora, nom. nov. 



1. Abactinal system. X 4. 



2. Part of actinostome and base of corona. X 3. 



3. Part of ambulacrum at ambitus, showing vertical arrangement of outer pore-pairs. X 5. 



4. Holopneustes pycnotylus, sp. nov. 



4. Part of ambulacrum and interambulacrum, showing relative width, arrangement of 



pore-pairs, and tuberculation. X 5. 



5. Amblypneustes triseriatus, sp. nov. 



5. Part of ambulacrum and interambulacrum, showing relative width, arrangement of pore- 



pairs, and tuberculation. X 9. 



6. Amblypneustes pachistus, sp. nov. 



6. Part of ambulacrum and interambulacrum, showing relative width, arrangement of 



pore-pairs, and tuberculation. X 5. 



