Plate 66. 

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



1. Large tridentate pedicellaria. x 30. 



2. Small tridentate pedicellaria. X 30. 



3. Triph3'llou3 pedicellaria, with partly open valves, x 30. 



4. Sphaeridium. X 30. 



5. Araeosoma Belli Mortens. 



5. Sphaeridium. x 70. 



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



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

 7-10. Margins of valves of tridentate pedicellarioe. 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, 10. Araeosoma eurypatum A. Ag. and CI. 



18. Sph.Tpridia. X 70. 



19. Valve of triphyllous pedicellaria. x 70, 



20. Araeosoma fenestratum Mortens. 



20. Dactylous pedicellaria with^i'ye valves, x 30. 



