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Summary
A collection of medusae from between Western Australia and Java has been examined; owing to poor preservation, many specimens were unidentifiable and many more were identifiable only with difficulty, but at least 20 species appear to be present. These are almost all what one would expect to find in this area by analogy with published lists of medusae from neighbouring areas, but one species new to science was found, Euphysora russelli sp. nov. and two other species (Euphysilla pyramidata and Rhysomedusa pomponina) in places a long way from where they had been found previously. E. pyramidata exhibited manubrial budding, which has not so far been recorded in any medusa belonging to the family Tubalariidae.
Specimens of the medusa Calycopsis sp. and of the pelagic hydroid Clytia sp. (the latter epizoic on pteropods), both from the Bass Strait, are compared with similar material in the above collection.