Abstract
Displaced amacrine cells in the chick retina were observed development. ally by Golgi methods under a light microscope and by elecron microscopy. Cells which were determined developmentally by electron microscopy were identified by section experiments of the optic nerve.
The displaced amacrine cells developed slightly late compared to the ganglion cells. The cells lined the cell bodies in an inner plexiform layer at stages 34 and 35 (about 8 days of incubation). The cell bodies became admixed with ganglion cells at stage 39 (about 13 days of incubation). The Golgi image of the developed displaced amacrine cells resembled one shape of amacrine cells if it was inverted. The special fine features of the cells included the distribution of chromatin granules, with slightly dense attachment to the nuclear envelope. The cytoplasm was rich in volume towards the sclera. Most of the cell organelles except the free ribosomes were distributed in the region eccentrically. These cells remained intact at 10 days postoperatively. Gradually, the cells became influenced secondarily and showed slight morphological changes in the cell organelles. However, the cells never disappeared as demonstrated in ganglion cells at 3 months postoperatively.
