_Haliclystus auricula_ CLARK. _Trachynema digitale_ A. AG. _Campanella pachyderma_ A. AG. _Cyanea arctica_ PÉR. et LES. _Aurelia flavidula_ PÉR. et LES. ORDER III.--CTENOPHORÆ ESCH. _Idyia roseola_ AG. _Pleurobrachia rhododactyla_ AG. _Bolina alata_ AG. CLASS III.--ECHINODERMATA KLEIN. ORDER I.--CRINOIDEA MILL. _Pentacrinus,_ _Alecto Eschrichtii_ M. & T. _Alecto meridionalis_ AG. ORDER II.--OPHIURIDEA FORBES. _Amphiura squamata_ SARS. _Ophiopholis bellis_ LYM. _Astrophyton Agassizii_ STIMP. ORDER III.--ASTERIDEA FORBES. _Ctenodiscus crispatus_ D. & K. _Hippasteria phrygiana_ AG. _Cribrella oculata_ FORBES. _Solaster endeca_ FORBES. _Crossaster papposa_ M. & T. _Astracanthion pallidus_ AG. _Astracanthion berylinus_ AG. ORDER IV.--ECHINIDEA LAM. _Toxopneustes drobachiensis_ AG. _Echinarachnius parma_ GRAY. ORDER V.--HOLOTHURIDEA BRANDT. _Caudina arenata_ STIMP. _Synapta tenuis_ AYRES. _Cuvieria squamata_ D. & K. _Pentacta frondosa_ JÄG. * * * * * INDEX. PAGE Abbreviations of authors' names, xii Acalephs, 21 Actinia, 7 Actinoids, 7 Alecto Eschrichtii, 121 Alecto meridionalis, 121 Amphiura squamata, 115 Arachnactis brachiolata, 14 Astracanthion berylinus, 108 Astracanthion pallidus, 112 Astrangia Danæ, 16 Astrophyton Agassizii, 117 Aurelia flavidula, 42 Bicidium parasiticum, 15 Bolina alata, 31 Bougainvillia superciliaris, 69 Campanella pachyderma, 44 Campanularians, 49 Caudina arenata, 97 Circe, 45 Clytia bicophora, 56 Comatula, 121 Coryne mirabilis, 68 Cribrella oculata, 112 Crinoids, 120 Crossaster papposa, 114 Ctenodiscus crispatus, 113 Ctenophoræ, 26 Cuvieria squamata, 98 Cyanea aretica, 38 Development of Melicertum, 64 '' '' Tima, 64 Discophoræ, 37 Distribution of Life in the Ocean, 141 Dynamena pumila, 66 Dyphasia rosacea, 67 Dysmorphosa fulgurans, 75 Echinarachnius parma, 106