Report on the Scientific Results of the "Michael Sars" North Atlantic Deep-sea Expedition, 1910, Carried Out Under the Auspices of the Norwegian Government and the Superintendence of Sir John Murray and Johan Hjort: pt. 1. Cephalopoda, by C. Chun. Cirripedia, by P. P. C. Hoek. Pteropoda, by K. E. H. Bonnevie. Scyphomedusae, by H. Broch. Pennatulacea, by H. Broch. Hydroida, by H. Broch. Muraenoid larvae, by E. Lea. Pycnogonida, by O. M. Olsen