 An exotic species of earthworm "Dendrodrilus rubidus" was also collected in 1929 from a dump near Atlas Cove, and has recently been collected from a variety of habitats including wallows, streams and lakes on Heard Island.The arthropods of Heard Island are comparatively well known with 54 species of mite and tick, one spider and eight springtails recorded.A study over summer at Atlas Cove in 1987/88 showed overall densities of up to 60 000 individual springtails per square metre in soil under stands of "Pringlea antiscorbutica".