_Poteriocrinus_ and _Platycrinus_ are, with some reservation, recorded from the Gympie Series at Stanwell and the marine beds of the Bowen River Coal-field respectively, both in Queensland. In Western Australia the Carbopermian rocks of the Gascoyne River are known to contain crinoid stems, tentatively referred to either the Rhodocrinidae or the Actinocrinidae. There is also a species of _Platycrinus_ known from the Gascoyne and Irwin Rivers, and from the Kimberley District. =Triassic Crinoids.--= The Kaihiku Series of Nelson, New Zealand, has yielded some crinoid stems, but the genus has not yet been determined. =Cretaceous Crinoids.--= In the Lower Cretaceous Limestone of Queensland, at Mitchell Downs and Wollumbilla, a typical Crinoid, closely allied to the living _Pentacrinus_ is found, namely, _Isocrinus australis_ (Fig. 76 F). The Upper Cretaceous opal deposits of White Cliffs in Wilcannia, New South Wales, contain many opalised fossil remains, amongst them being _Isocrinus australis_, already noticed as occurring in the Lower Cretaceous of Queensland. =Cainozoic Crinoids.--= _Pentacrinus stellatus_ is a species founded on some deeply indented pentagonal stem-joints found in the Oamaru Series (Miocene) at Curiosity Shop, South Canterbury, New Zealand, and also occurring in the Chatham Islands. This species has been identified in the Aire Coastal beds in Victoria, of the same age. Another generic type, _Antedon_, the beautiful "Feather Star," is frequently met with in Janjukian strata in Victoria and South Australia, as at Batesford and Mount Gambier, represented by the denuded crown and the ossicles of the arms of a comparatively large species; whilst another and smaller form has been described from beds of the same age from borings in the Victorian Mallee, under the name of _A. protomacronema_. _BLASTOIDEA--Bud-shaped Echinoderms._ =Distribution and Characters of Blastoidea.--= This forms a small class which has a few representatives in the rocks of Australia. Elsewhere they are chiefly of Devonian and Carboniferous ages. In Australia they are confined, so far as known, to sediments of the Carboniferous System. The animal was rooted to the sea-floor and a jointed stem was usually present. The cup or theca, as before noted, is bud-shaped, and consists of basal, radial and deltoid plates, the edges of which are folded inwards into the thecal cavity, and thus the internal organs came into contact with the incurrent water. The cup bears five food grooves, bordered by numerous arms or brachioles, which directed the incurrent particles into the thecal cavity. =Carbopermian Blastoids.--=