A description is given of a number of observations ahd experiments on the larvae and colonies of Tubularia. The experimental material could best be referred to the species T. larynx Ellis & Solander. Its characters are not wholly consistent with the diagnosis of this species, but the differences which exist are not great enough to warrant the erection of a new species.Liberation of the actinulae takes place more freely in darkness than in light, and there is evidence which suggests that it only occurs in still water or in weak currents.

Summary Houses were surveyed by dust sampling to examine the occurrence and significance of storage mites in rural areas in the U.K. As a part of this project pets’beds were sampled, and it was discovered that not only do they contain storage mites, but that in nearly all instances the classical housedust mite (D. pteronyssinus) was present in significant numbers.