A broad survey is given of the occurrence and distribution of microarthropods (and some other animals) in the soil of the following vegetation types in New Guinea: algal communities in the intertidal zone, beach forest, mangrove swamp forest, sago palm swamp, lowland swamp forest, forests on limestone and other sedimentary rocks, pioneer vegetation on barren coral limestone, forests on serpentine and cristalline schists, and montane vegetations.