A survey of the literature on the Danish Entoprocta is given. Descriptions and figures are given of all Entoprocta, viz. 24 species, recorded from Danish waters. Seventeen of these are new to the Danish fauna, and eight are new to science. The members of the Loxosomatidae have been especially studied, and their systematics revised. The two genera Loxosomella and Loxocalyx are united into one under the name of Loxosomella, and this genus and Loxosoma are both divided into two subgenera. Based in part on the new species, the phylogenetic trends within the Loxosomatidae are discussed. Considering the association between all the species described and their hosts, it is concluded that the Loxosomatidae are energy commensals which secure their food by filtering it from the water currents made by their host animals. Observations on the periods of reproduction of the Loxosomatidae seem to show that the majority of the species reproduces all year round.