Plate 64. 



1-8. Araeosoma bicolor A. Ag. and CI. 



1. Dactylous pedicellaria. x 70. 



2. Large tridentate pedicellaria. X 30. 



3. Triphyllous pedicellaria. X 70. 



4. Valve of dactylous pedicellaria. X 70. 



5. Valve of large tridentate pedicellaria. x 70. 



6. Tip of valve of large tridentate pedicellaria. X 150. 



7. Valve of small tridentate pedicellaria. x 70. 



8. Valve of triphyllous pedicellaria. x 70. 



9-12. Sperosoma gigantetim A. Ag. and CI. 



9. Large tridentate pedicellaria. x 70. 



10. Va>ve of large tridentate pedicellaria. x 70. 



11. Valve of small tridentate pedicellaria. x 70. 



12. Valve of triphyllous pedicellaria. x 70. 



