Allocortex

The allocortex is a part of the cerebral cortex characterized by having fewer cell layers than the isocortex (less than six).

The specific regions of the brain normally described as part of the allocortex are:
 * the olfactory cortex, which mediates olfaction
 * the hippocampus, which mediates limbic input

The allocortex is also referred to as the "heterotypic cortex."