Plate 48. 

 1-9. Arbaeia punctulata Gray. 



1. Valve of tridentate pedicellaria. X 70. 



2. Valve of large tridentate pedicellaria. X 70. 



3. Valve of small tridentate pedicellaria. X 70. 



4. Valve of triphyllous pedicellaria. X 70. 



5. Valve of ophicephalous pedicellaria. X 70. 



6. Another valve of another ophicephalous pedicellaria. X 70. 



7. Disk-plate of pedicel. X 70. 



8. Supporting-plate of disk of pedicel. X 70. 



9. Calcareous rods from pedicels. X 70. 



10-14. Arbaeia lixula LoTc'n. 



10. Valve of tridentate pedicellaria. X 70. 



11. Valve of smaller tridentate pedicellaria. X 70. 



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



13. Valve of triphyllous pedicellaria. X 70. 



14. Valve of ophicephalous pedicellaria. X 70. 



15-19. Arbaeia spatuligera A. Ag. 



15. Valve of tridentate pedicellaria. X 70. 



16. Valve of triphyllous pedicellaria. X 70. 



17. Calcareous rods from pedicels. X 70. 



18. Upper end of stalks of pedicellariye. X 70. 



19. Sphaeridium. X 70. 



20, 21. Arbaeia stellata Gray. 



20. Valve of triphyllous pedicellaria. X 70. 



21. Calcareous plates from pedicels. X 70. 



