Starting with a model of real-space bosons as proposed by the present author, by Micnaset al.and others, with bosons the main current carriers aboveTc, an explanation is proposed for the very small entropy at the transition observed by Loramet al., much less thankBIn 2 per carrier. This involves the assumption, made previously, that the bosons move in an impurity band, and takes into account their mutual repulsion and the existence of Anderson localized states in the band.