The termination of ipsilaterral and contralateral optic fibers in the lateral geniculate body of Galago crassicaudatus

The lateral geniculate body of Galago crassicaudatus has five layers which have nbeen numbered in a ventrodorsal direction. The layers 1, 2, and 5 are composed of large cells and the layer 3 and 4of small ones. The ratio of crssed and uncrossed fiber is 1:1 Following enucleation of one eye, preterminal and terminal (synaptic)degeneration occurs in layers 2 and 4 ipsilaterally, whereas the contralateral fibers terminate in layers 1 and 5. The third layer recieves a small contribution of crossed and uncrossed fibers. As far as can be judged from lightmicroscopy, the type appears to be in the ration 3:1. Synaptic complexes composed of 2‐3 terminals in close approximation are frequently found.