Plate 125. 

 1-3. Arachnoides placenta (L.) 



1. Bidentate pedicellaria, showing back of valve. X 70. 



2. Bidentate pedicellaria, showing both valves. X 70. 



3. Side view of tip of \alve of bidentate pedicellaria. X 350. 



4, 5. Dendraster excentricus (Esch.). 



4. Side view of tip of primary spine. X 70. 



5. Top view of tip of primary spine. X 70. 



fi. Echinarachnius mirabilis (A. Ag.). 

 li. \ alve of bidentate pedicellaria. X 350. 



7, 8. Echinarachnius par ma (Lamarck). 



7. Biphyllous pedicellaria. X 350. 



8. Valve of bidentate pedicellaria. X 70. 



9, 10. Echinodiscus auritus Leske. 



0. Valve of biphyllous pedicellaria. X 350. 



10. Valve of bidentate pedicellaria. X 70. 



11, 12. Echinodiscus tenuissimus (Agass. & Des.). 



11. Valve of bidentate pedicellaria. X 70. 



12. Blade of valve of ophicephalous pedicellaria. X 350. 



13-15. Astriclypeus manni Verrill. 



13. Blade of valve of tridentate pedicellaria. X 350. 



14. Tip of blade of valve of tridentate pedicellaria. X 350. 



15. Valve of triphyllons pedicellaria. X 350. 



16-21. Mellita quinquiesperforata (Leske). 



16. Side view of miliary spine. X 350. 



17. Top view of tip of primary spine. X 70. 



18. Side view of tip of primary spine. X 70. 



19. Valve of bidentate pedicellaria. X 350. 



20. Side view of valve of biphyllous pedicellaria. X 350. 



21. Side view of valve of bidentate pedicellaria. X 350. 



22, 23. Mellita sexiesperforata (Leske). 



22. Blade of valve of bidentate pedicellaria. X 350. 



23. Bidentate pedicellaria. X 350. 



24. Encope grandis Agass. 



24. Side view of tip of valve of bidentate pedicellaria. X 350. 



25. Encope emarginata (Leske). 



25. Side view of tip of valve of bidentate pedicellaria. X 350. 



