18. Spatangus pallidus H. L. Clark. 



18. Outline of blade of valve of stout tridentate pedicellaria. X 40. 



19. Spatangus paucituberculatus A. Ag. & CI. 



19. Outline of blade of valve of stout tridentate pedicellaria. X 40. 



20. Spatangus californicus H. L. Clark. 



20. Outline of blade of valve of stout tridentate pedicellaria. X 40. 



21, 22. Plagiobrissus grandis (Gmelin). 



21. Valve of long globiferous pedicellaria. X 95. 



22. Long globiferous pedicellaria. X 40. 



23. Moira clotho (Mich.). 



23. Stalk of globiferous pedicellaria. X 40. 



24. Pseudomaretia alta (A. Ag.). 



24. Globiferous pedicellaria. X 40. 



25. Maretia peloria H. L. Clark. 



25. Side view of valve of globiferous pedicellaria. X 40. 



26, 27. Rhynobrissus micrasteroides A. Ag. 



26. Valve of globiferous pedicellaria. X 95. 



27. Side view of tip of valve of globiferous pedicellaria. X 95. 



28, 29. Rhynobrissus pyramidalis A. Ag. (From Siam). 



28. Valve of ophicephalous pedicellaria. X 95. 



29. Side view of base of valve of ophicephalous pedicellaria. X 95. 



30. Metalia sternalis (Lamarck). 



30. Bidentate pedicellaria. X 95. 



31. Breynia australasiae (Leach). 

 .'51. Valve of ophicephalous pedicellaria. X 95. 



:;_'. :v.l Pseudolovenia hirsuta A. Ag. & CI, 



32. Head of multidentate pedicellaria. X 40. 



33. Valve <>f multidentate pedicellaria. X l<>. 



