Figure 1 in REVIEW Exploring annelids in the age of Enlightenment and beyond: classification and bioluminescence

Figure 1. Plate LXXVIII of Rösel von Rosenhof (1755), showing the 'small water snake with a long tongue-like tentacle' [now Stylaria lacustris (Linnaeus, 1758)]. In subfigures 15–18, the worm is shown free-swimming or caught by the tentacles of an 'orangeyellow polyp with long horn-shaped arms' (the brown hydra, Hydra oligactis Pallas, 1766). Worms in paratomic division, such as that illustrated in subfigure 17, were misinterpreted as the conjunction of individuals for either beneficial or aggressive purposes.