The archicortex is a portion of the cerebral cortex that, together with the paleocortex, develops in association with the olfactory system. The archicortex is phylogenetically older than the neocortex and lacks its layered structure. The embryonic archicortex corresponds to the cortex of the dentate gyrus and hippocampus in mature mammals. It is part of the limbic system and has functions related to emotions and formation of memory. Signals being sent from the limbic lobe to the hippocampal formations go via the archicortex as an intermediate.