Hydroids from the Theta, Vema and Yelcho cruises of the Lamont-Doherty geological observatory

CONTENTS Introduction................... 6 List of the Stations................. 6 Taxonomic Report ................ 13 Family Corymorphidae................... 13 Subfamily Branchiocerianthinae............. 13 Branchiocerianthus norvegicus Brattström, 1956........ 13 Family Tubulariidae................ 15 Tubularia spec...................... 15 Family Corynidae................. 15 Coryne pusilla Gaertner, 1774............. 15 Family Bougainvilliidae............... 16 Dicoryne spec................. 16 Hydractinia echinata (Fleming, 1828)........... 17 Leuckartiara octona (Fleming, 1823)........... 17 Leuckartiara abyssi (G. O. Sars, 1874).......... 19 Family Eudendriidae................ 20 Eudendrium laxum Allman, 1877............ 20 Eudendrium rameum (Pallas, 1766)........... 21 Family Haleciidae................. 21 Halecium jaederholmi nov. spec............. 21 *Halecium macrocephalum Allman, 1877.......... 24 *Ophiodissa arborea (Allman, 1888)........... 25 Halecium halecinum (Linnaeus, 1758).......... 25 Halecium muricatum (Ellis & Solander, 1786)........ 27