We have used Lucifer Yellow for histological tracing of displaced amacrine cells within the ganglion cell layer (GCL) during the embryonic development of the chicken retina. Incubating whole eyes in the dye leads to bright staining of all displaced amacrine cells, whereas ganglion cells and glial cells are not stained. A subpopulation of cells of the inner part of the inner nuclear layer (INL) are also stained (for further details see ref. 13). Kainic acid, which is known to interfere with and kill amacrine cell systems, blocks the staining of these cells fully. This in addition to histological evidence confirms that the LY-stained cells in the GCL are displaced amacrine cells. Of the cells in the GCL, 23% (+/- 3%) are of the displaced amacrine type. Further, we find that the cytoarchitectural arrangement of these cells changes significantly during development.