National Geographic : 1926 Aug
THE NATIONAL GEOGRAPHIC MAGAZINE Copyright National Geographic Society Painting from life by William Crowder DACTYLOMETRA QUINQUECIRRA (Upper); GONIONEMUS MURBACHII (Lower) The two large forms at the top of the picture are known as the speckled-jelly and have a particularly irritant poison. They are Scyphomedusae and, like the Aurelia, start life as indi vidual units. The smaller jellyfishes at the bottom, however, pass through a colony stage, resembling a many-flowered plant, each "flower" being a young jellyfish. These plantlike structures are known as Hydroids.