Jellyfish from the Basal Cambrian in South Australia

I WISH to bring to notice a recent find of remarkably well-preserved impressions of jellyfish, animal tracks and certain problematical forms in the basal quartzite of the Cambrian in South Australia. Originally, I found about a dozen impressions, eight of which have since been described¹, four of them possibly having jellyfish affinities. Since that time, Sir Douglas Mawson with a party of students, and still later I myself, collected one hundred or more additional specimens. While many of the forms appear to be jellyfish, others may be algæ and animal tracks.