On the Reactions to Humidity of Peripatopsis Moseleyi (Wood-Mason)

Quantitative studies have been made by previous workers on the reactions to humidity of three classes of terrestrial arthropod. The isopods have been studied by Gunn (1937) and Waloff (1941), the sheep tick by Lees (1948), while a number of insects have been examined in this connexion. The Onycophora have so far escaped attention. From a consideration of the usual habitat of these creatures it appeared likely that a marked humidity reaction might exist. The experiments described below give an account of this reaction, its character and mechanism.