Four new species of echiuroids, Thalassema sydniense, Arhynchite hiscocki, Anelassorhynchus adelaidensis and Ochetostoma autraliense are described and six other species are listed from Australia. Some anatomical details of Pseudobonellia biuterina Johnston and Tiegs are redescribed and a key to the genera of Australian echiuroids is given.