National Geographic : 1926 Aug
THE NATIONAL GEOGRAPHIC MAGAZINE -'k' Copyright National Geographic Society Painting from life by William Crowder ZYGODACTYLA GROENLANDICA (Upper); SARSIA MIRABILIS (Lower) The extreme tenuousness of many jellyfishes, with respect to their comparatively large size, is one of the marvels of Nature. So delicate in structure are some forms that a touch of the finger is often sufficient to rupture the tissues. Yet they capture and kill for food small crustaceans and fishes much more robustly organized than they. The life histories of the jelly fishes are among the most peculiar of the whole animal kingdom.