PREFACE

Thematic Issue Nr. 1: Benthic Fauna of the Mid-Atlantic Ridge: Results of the MAR-ECO Expedition
Andrey V. Gebruk (Guest Editor)

EDITORIAL

Benthic fauna of the northern Mid-Atlantic Ridge: results of the MAR-ECO expedition
Andrey V. Gebruk; Tom Fenchel; Franz Uiblein

ORIGINAL ARTICLES

Pourtalesiid sea urchins (Echinodermata: Echinoidea) of the northern Mid-Atlantic Ridge
Alexander N. Mironov

Glass sponges (Porifera, Hexactinellida) of the northern Mid-Atlantic Ridge
Konstantin R. Tabachnick; Allen G. Collins

Holothurians (Holothuroidea, Echinodermata) of the northern Mid-Atlantic Ridge collected by the G.O. Sars MAR-ECO expedition with descriptions of four new species
Andrey V. Gebruk

Description of Aega sarsae sp. nov. and redescription of Syscenus atlanticus Kononenko, 1988 (Crustacea, Isopoda, Aegidae) from the Mid-Atlantic Ridge
Angelika Brandt; Hans Georg Andres

Deep-water Ophiuroidea of the northern Atlantic with descriptions of three new species and taxonomic remarks on certain genera and species
Alexander V. Martynov; Nina M. Litvinova

Anthozoa from the northern Mid-Atlantic Ridge and Charlie-Gibbs Fracture Zone
Tina N. Molodtsova; Nadezhda P. Sanamyan; Natalya B. Keller

Asteroid fauna of the northern Mid-Atlantic Ridge with description of a new species Hymenasterides mironovi sp. nov.
Anna B. Dilman

New records of Echiura and Sipuncula in the North Atlantic Ocean, with the description of a new species of Jacobia
Vantsetti V. Murina

SHORT REPORTS

Notes on brachiopods from the North Atlantic
Olga N. Zezina
Approach and methods for sampling of benthic fauna on the 2004 MAR-ECO expedition to the Mid-Atlantic Ridge
Odd Aksel Bergstad; Andrey V. Gebruk