COMMON OR CHARACTERISTIC SPECIES OF THE FOREGOING CHAPTER. TRILOBITES. _Ptychoparia howchini_, Eth. fil. Lower Cambrian: South Australia. _Dolichometopus tatei_, H. Woodward. Lower Cambrian: South Australia. _Olenellus browni_, Eth. fil. Lower Cambrian: Northern Territory. _Agnostus australiensis_, Chapm. Upper Cambrian: Victoria. _Ptychoparia thielei_, Chapm. Upper Cambrian: Victoria. _Dikellocephalus florentinensis_, Eth. fil. Upper Cambrian: Tasmania. _Dinesus ida_, Eth. fil. Lower Ordovician: Victoria. _Asaphus illarensis_, Eth. fil. Ordovician: Central S. Australia. _Ampyx parvulus_, Forbes, var. _jikaensis_, Chapm. Silurian (Melbournian): Victoria. _Illaenus jutsoni_, Chapm. Silurian (Melbournian): Victoria. _Proetus euryceps_, McCoy. Silurian: Victoria. _Cyphaspis spryi_, Gregory. Silurian (Melbournian): Victoria. _Bronteus enormis_, Eth. fil. Silurian (Yeringian): Victoria. _Lichas australis_, McCoy. Silurian (Yeringian): Victoria. _Odontopleura jenkinsi_, Eth. fil. Silurian: New South Wales. Silurian (Yeringian): Victoria. _Encrinurus punctatus_, Brunnich sp. Silurian: New South Wales. Silurian (Yeringian): Victoria. _Encrinurus (Cromus) murchisoni_, de Koninck. Silurian: New South Wales. _Encrinurus (Cromus) spryi_, Chapm. Silurian (Melbournian): Victoria. _Calymene blumenbachii_, Brongn. Silurian (Wangapeka Series): New Zealand. _Homalonotus expansus_, Hector. Silurian (Wangapeka Series): New Zealand. _Homalonotus knightii_, König. Silurian (Wangapeka Series): New Zealand. _Homalonotus harrisoni_, McCoy. Silurian (Melbournian): Victoria. _Homalonotus vomer_, Chapm. Silurian: Victoria. _Cheirurus insignis_, Beyrich. Silurian: New South Wales. _Phacops sweeti_, Eth. fil. and Mitch. Silurian: New South Wales. Silurian (Yeringian): Victoria. _Phacops serratus_, Foerste. Silurian (Yeringian): Victoria. Silurian: New South Wales. _Dalmanites meridianus_, Eth. fil. and Mitch, sp. Silurian: New South Wales, Victoria and Tasmania. _Cheirurus_ sp. Middle Devonian: Victoria. _Proetus_ sp. Devonian: Western Australia. _Phillipsia seminifera_, Phillips. Carbopermian: New South Wales. _Phillipsia grandis_, Eth. fil. Carbopermian: W. Australia and Queensland. _Griffithides eichwaldi_, Waldheim. Carbopermian: New South Wales and Queensland. _Brachymetopus strzelecki_, McCoy. Carbopermian: New South Wales. PHYLLOPODA. _Leaia mitchelli_, Eth. fil. Upper Carboniferous: New South Wales. _Estheria coghlani_, Cox. Trias: New South Wales. _Estheria minuta_, Alberti sp. Trias: New Zealand. _Estheria mangaliensis_, Jones. Jurassic: Queensland. OSTRACODA. _Leperditia_ sp. Lower Cambrian: S. Australia. _Beyrichia kloedeni_, McCoy. Silurian (Yeringian): Victoria. _Beyrichia wooriyallockensis_, Chapm. Silurian (Yeringian): Victoria.