Size classes of ganglion cells in the central yellow field of the pigeon retina.

Ganglion cells in the central yellow field of the pigeon retina were identified by retrograde transport of horseradish peroxidase from the optic tectum. The soma size range was from 5 to 16 micrometers, with the mean at 7.7 micrometers. At least 85% of the cells in the ganglion cell layer are true orthotopic ganglion cells, tightly packed in a non-random array.