Cover legend: Ultrastructural transmission electron microscope image of Xenopus laevis retina, with colors overlain to reveal GABAergic (red) and glycinergic (green) amacrine cells with their processes in the inner plexiform layer, as well as glutamatergic (blue) excitatory cell classes, including bipolar cells and ganglion cells. For more information, see the article by Lee et al. in this issue (pages 2121–2128).