Temperatures in clumps in the Lagoon Nebula derived from different molecular species. Coloured circles show the kinetic temperatures from para-formaldehyde (annuli) and the rotational temperatures of acetoni-trile (left inner circle) and methyl acetylene (right inner circle). The size of the inner circles corresponds to the approximate beam size of the observations. The grey-scale background image shows the JCMT SCUBA 870 µm dust continuum flux (see Fig. 2).