The retinotectal projections from surgically rounded-up half-eyes in Xenopus

In Xenopus embryos of stage 32 half of one eye anlage was removed and the remaining half was surgically rounded-up. The visuotectal projections through such half-eyes, recorded after metamorphosis, showed in most cases a deformation of the map which corresponded to the deformation imposed on the half-eye at operation. Some eyes gave normal maps and some showed mirror-reduplication.