24-26. Prionechinus sculptus A. Ag. and CI. 



24. Valve of globiferous pedicellaria. X 350. 



25. Valve of tridentate pedicellaria. X 70. 



26. Sph^ridium. X 70. 



27-31. Orechinus monolini Dod. 



27. Valve of globiferous pedicellaria. X 70. 



28. Side view of tip of same. X 70. 



29. Valve of tridentate pedicellaria. X 70. 



30. Side view of same. X 70. 



31. Sphaeridium. X 70. 



32. Echinus Wallisii A. Ag. 



32. Globiferous pedicellaria, with entire stalk. X 30. 



33. Salmacis Dussumieri Agass. and Des. 



33. Base of valve of globiferous pedicellaria. X 70. 



34. Salmacis erythracis, sp. nov. 



34. Base of valve of globiferous pedicellaria. X 70. 



35. Salmacis Belli Dod. 



35. Base of valve of globiferous pedicellaria. X 70. 



36. Salmacis bicolor Agass. 



36. Base of valve of globiferous pedicellaria. X 70. 



