Abstract
This eelworm, only just visible to the naked eye, and quite common in vinegar in all parts of the world, has long been known to zoologists, and indeed was an object of keen interest and discussion to the naturalists of the seventeenth century. Petrus Borellus [3], for instance, enthusiastic over the recent adoption of the microscope for researches in natural history, published in 1656 his “Observationum Microcospicarum Centuria,” in which he leads off with a note “De Vermibus aceti.” In the twelfth edition of the “Systema Naturae” (1767), Linnaeus included a speciesredivivumin that final genus of the Regnum Animale so appropriately namedChaos. This species of animal he says, “Habitat in Aceto & Glutine Bibliopegorum.”.