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CONTENTS Letter of Transmittal, by E. F. Pittman, Esq., A.R.S.M., Government Geologist ... PAGE vii Preface ... ... ix MEMOIR. I.—Introduction 65 II.—Description of Genera and Species ... t . . 67 Class—Echinoidea 67 Order—Pal^echinoidea 67 Family—Arcii/Eocidarid.e 67 Genus—Arcileocidaris 67 Class—Asteroidea . . . . . . 70 Order— Encrinasteri.e 70 Family—Palaeasteridas ... 70 Genus—P alabaster ... 70 Class—Crinoidea •75 Order—Coadunata 77 Family—Actinocrinidas ... 77 Genus—Actinocrinus . . . « • • 77 „ Periechocrinus ... M ( 78 Family—Platycrinidas ... . . . 80 Order—Inadunata • • • ... 81 Family—Synbathocrinid/e • . . 81 „ Cyathocrinid/e ... 81 „ POTERIOCRINID.E... 81 Genus— Tribraciiiocrinus 82 „ PlIIALOClUNUS 98 Class—Annelida . . . 119 Order—Tubicola 120 Family—Serpulidae 120 Genus—Serpula 120 Class—Crustacea 121 Order—Ostracoda 121 Family—Leperditidas 121 Genus—Carbonia 121 Family—Cypridinidae 122 Genus—Entomis 122 Family—Polycopidae . . . 123 . ,, Cytheridas ... 124 ,, Cypridas ... ... 124 Order—Trilobita 124 Family—Proetidai 124 Genus—Phillipsia ... 126 „ Griffitiiides ... ... 130