The _HOLOTHUROIDEA_ (Sea-Cucumbers) are represented in Australian deposits by a unique example of a dermal spicule of wheel-like form, referred to _Chiridota_, obtained from the Cainozoic (Janjukian) beds of Torquay. This genus is also known from the "calcaire grossier" or Middle Eocene of the Paris Basin, and is found living in all parts of the world. * * * * * COMMON OR CHARACTERISTIC FOSSILS OF THE FOREGOING CHAPTER. CRINOIDS. (?) _Pisocrinus yassensis_, Eth. fil. Silurian: New South Wales. _Helicocrinus plumosus_, Chapman. Silurian: Victoria. _Botryocrinus longibrachiatus_, Chapm. Silurian: Victoria. _Hapalocrinus victoriae_, Bather. Silurian: Victoria. _Actinocrinus_ sp. Carboniferous: Queensland. _Cyathocrinus_ sp. Carboniferous: New Zealand. _Phialocrinus konincki_, Clarke sp. Carbopermian: New South Wales. _Phialocrinus princeps_, Eth. fil. Carbopermian: New South Wales. _Tribrachiocrinus clarkei_, McCoy. Carbopermian: New South Wales. (?) _Platycrinus_ sp. Carbopermian: Queensland. _Platycrinus_ sp. Carbopermian: W. Australia. _Isocrinus australis_, Moore sp. Cretaceous: Queensland. _Pentacrinus stellatus_, Hutton. Miocene: New Zealand, Chatham Ids. and Victoria. _Antedon protomacronema_, Chapman. Miocene: Victoria (deep borings). BLASTOIDS. (?) _Mesoblastus australis_, Eth. fil. Carbopermian: Queensland. STARFISHES. _Palaeaster smythi_, McCoy. Silurian: Victoria. _Palaeaster meridionalis_, Eth. fil. Silurian: Victoria. _Urasterella selwyni_, McCoy. Silurian: Victoria. _Palaeaster giganteus_, Eth. fil. Carbopermian (L. Mar. Ser.): New South Wales. _Palaeaster clarkei_, de Koninck. Carbopermian (L. and Up. Mar. Ser.): New South Wales. _Pentagonaster_ sp. Miocene: Victoria. _Astropecten_ sp. Miocene: New Zealand. BRITTLE-STARS. _Protaster brisingoides_, Gregory. Silurian: Victoria. _Gregoriura spryi_, Chapman. Silurian: Victoria. _Sturtzura leptosomoides_, Chapman. Silurian: Victoria. (?) _Sigsbeia_ sp. Lower Pliocene: Victoria. ECHINOIDS. _Palaeechinus_ sp. Silurian: Victoria. (?) _Archaeocidaris selwyni_, Eth. fil. Carbopermian: New South Wales. _Micraster sweeti_, Eth. fil. Cretaceous: Queensland. _Cidaris (Leiocidaris) australiae_, Duncan. Miocene and Lower Pliocene: Victoria and S. Australia. _Cidaris striata_, Hutton. Miocene: New Zealand. _Echinus (Psammechinus) woodsi_, Laube sp. Miocene and L. Pliocene: Victoria and S. Australia. _Temnechinus macleayana_, T. Woods. Cainozoic (? Lower Pliocene): Papua. _Fibularia gregata_, Tate. Miocene: Victoria and S. Australia. _Echinocyamus (Scutellina) patella_, Tate sp. Oligocene to Miocene: Victoria and S. Australia. _Clypeaster gippslandicus_, McCoy. Oligocene to L. Pliocene: Victoria.