PLATE 4. 



1, 2. Chiridota aponocrita H. L. Clark. 



1. Supporting-rods of tentacles. X 450. 



2. Miliary granules. X 450. 



3. Myriotrochus bathybius H. L. Clark. 



Calcareous wheel. X 95. 



4. Myriotrochus giganteus H. L. Clark. 



Calcareous wheel. X 95. 



5, 6. Molpadia bathybia H. L. Clark. 

 Disks of tables. X 95. 

 Spire of a table, from the side. X 95. 



7, 8. Scotodeima parvispiculatum H. L. Clark. 

 Calcareous particles. X 140. 



9, 10. Mesothuria megapoda H. L. Clark. 



9. Table, seen from the side. X 95. 



10. Disk of table. X 95. 



11-13. Mesothuria multipora H. L. Clark. 



11. Table, seen from the side. X 95. 



12. Disk of table. X 95. 



13. Spire of table, seen from above. X 95. 



14-17. Synallactes triplax H. L. Clark. 



14. Typical table seen from the side. X 95. 



15. Disk of typical triradiate table. X 95. 



16. Disk of larger table. X 95. 



17. Disk of an " unclosed " table. X 95. 



