Plate 66. 

 1-4. Arseosoma pyrochloa A. Ag. and CI. 



1. Large tridentate pedicellaria. X 30. 



2. Small tridentate pedicellaria. x 30. 



3. Triphyllous pedicellaria, with partly open valves, x 30. 



4. Splueridium. X 30. 



5. Arseosoma Belli Mortens. 



5. Sphseridium. X 70. 



6-17. Arseosoma thetidis A Ag. and CI. 



6. Valve of very small tridentate pedicellaria. X 70. 

 7-10. Margins of valves of tridentate pedicellaria?. X 70. 



11. Blade of valve of large tridentate pedicellaria, from within. X 70. 



12. Tip of blade of large tridentate pedicellaria, side view, x 70. 



13. Calcareous particles from pedicels. X 70. 



14. Valve of triphyllous pedicellaria. X 70. 



15. Large tridentate pedicellaria. X 30. 



16. Triphyllous pedicellaria. X 30. 



17. Tridentate pedicellaria. X 30. 



18, 19. Arseosoma eurypatum A. Ag. and CI. 



18. Sphreridia. X 70. 



19. Valve of triphyllous pedicellaria. X 70. 



20. Arseosoma fenestratum Mortens. 



20. Dactylous pedicellaria with Jive valves, x 30. 



