Spinefreie GABAergic neurons in the visual cortex of the rat were studied with the Golgi-Kopsch-method and immunohistochemical methods against GABA. They show differences of their axonal arborizations, axonal surfaces and of their axonal terminal formations. We found large spinefree neurons, spinefree neurons with strictly axonal fields, spinefree neurons with dense axonal fields, spinefree neurons with axons forming arcades, spinefree neurons with columnar axons and spinefree neurons with clewded axonal terminals.