Plate 65. 

 1-3. Sperosoma giganteum A. Ag. and CI. 



1. Ophicephalous pedicellaria, seen from the side. X 70. 



2. The same, seen from distal end. X 70. 



3. Valve of same, seen from within. X 70. 



4-14. Sperosoma obscurum A. Ag. and CI. 



4. Tridentate pedicellaria, with valves in contact throughout, x 30. 



5. Tridentate pedicellaria, with valves in contact only at tip. x 30. 



6. Valve of a tridentate pedicellaria like fig. 5. x 70. 



7. Stalk of tridentate pedicellaria. X 70. 



8. Stalk of triphyllous pedicellaria. X 70. 



9. Ease of blade of valve of tridentate pedicellaria like fig. 4, side view, x 70. 



10. Base of blade of valve of tridentate pedicellaria like fig. 5, side view, x 70. 



11. Valve of a triphyllous pedicellaria. X 70. 



12. Valve of another triphyllous pedicellaria. X 70. 



13. Sphseridium. X 70. 



14. Calcareous particles from pedicels, x 70. 



15-20. Sperosoma biseriatum Dud. ( 1 ). From Station 4766 



15. Large tridentate pedicellaria. x 30. 



16. Small tridentate pedicellaria. X 30. 



17. Triphyllous pedicellaria. X 30. 



18. Valve of tridentate pedicellaria. x 70. 



19. Valve of triphyllous pedicellaria. X 70. 



20. Calcareous particles from pedicels, x 70. 



