. The Danish Ingolf-Expedition. Scientific expeditions; Arctic Ocean. ECHINOIDEA. II. 189 Clypeaster subdepressus Echinanthus rosaceus Echinarachnius parma Mellita sexforis Neolampas rostellata Echinolampas depressa Conolampas Sigsbei Rhyncopygus caribbsearum Urechiuus naresianus Ponrtalesia miranda — Wandeli Aeropsis rostrata Aceste bellidifera Pakeotropus Josephinse Tlionisoni Homolampas fragilis Palteopneustes cristatus — hystrix Linopneustes longispinus Palseobrissus Hilgardi Hemiaster expergitus (Mentzi) Agfassizia excentrica Pcriaster limicola Brisaster fragilis Schizaster orbignyanus Ma
. The Danish Ingolf-Expedition. Scientific expeditions; Arctic Ocean. ECHINOIDEA. II. 189 Clypeaster subdepressus Echinanthus rosaceus Echinarachnius parma Mellita sexforis Neolampas rostellata Echinolampas depressa Conolampas Sigsbei Rhyncopygus caribbsearum Urechiuus naresianus Ponrtalesia miranda — Wandeli Aeropsis rostrata Aceste bellidifera Pakeotropus Josephinse Tlionisoni Homolampas fragilis Palteopneustes cristatus — hystrix Linopneustes longispinus Palseobrissus Hilgardi Hemiaster expergitus (Mentzi) Agfassizia excentrica Pcriaster limicola Brisaster fragilis Schizaster orbignyanus Macropneustes spatangoides Brissus unicolor — Damesi Metalia pectoralis Meoma ventricosa Rhinobrissus micrasterioides Brissopsis alta atlantica. Of these species two may be eliminated as intruders from the Arctic littoral region, viz. Stron- gyloeeutrolus drobachicnsis and Echinarachnius parma, while some other species are only occasional visitors from the littoral region, viz. Cidaris tribuloides, Diadcma antillarum, Arbacia punctulata, Cly- peaster subdepressus, Echinanthus rosaceus, Rhyncopygus caribba-arum, Metalia pectoralis, Meoma ven- tricosa and Brissus unicolor. The same probably holds good for Psammechinus varicgatus, Tripneustes esculentus, Echinometra lucuittcr and Mellita sexforis. Of the rest the following species are known also from the European or African side of |the Atlantic: Dorocidaris papillata Cidaris affinis Stereocidaris iugolfiana Phormosoma placenta Calveria hystrix Araeosoma fenestratum Hygrosoma Petersi Dermatodiadema antillarum Salenia hasti°;era Trigonocidaris albida Genocidaris maculata Echinus elegans — Alexaudri — affinis Echinocyamus grandiporus Clypeaster subdepressus Neolampas rostellata Urechinus naresianus Ponrtalesia Wandeli Aceste bellidifera Homolampas fragilis Hemiaster expergitus Brisaster fragilis Brissus Damesi Brissopsis atlantica (?). Further two species, Salenia Pattcrsoni and Cocloplcurus floridanus, are known also from
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