Although the retinotectal projection of goldfish has long been known to have a high degree of retinotopic order, the structural basis for this in terms 0f the precise positioning of axonal arbors from neighboring retinal ganglion cells has not been determined. In studying this. a small number of neighboring retinal ganglion cells was selectively labeled by a microinjection of Dil into the retina. Following axoplasmic titansport for several days. the tectum was removed and flat-mounted for fluorescence microscopy. The iniection labeled a small number of axons and their terminal arbors which ranged in size from 108 x 134um to 394