The term area Ig2 of Gallay refers to one of two parts of the granular insula reported by some authors in the macaque ( Gallay-1012 ).. Identified by multiple stains, it is located between the other part, area Ig1 of Gallay, and field G. Both parts are distinguished by well-developed external granular layer (II) and internal granular layer (IV). Area Ig2 of Gallay is distinguished from area Ig1 of Gallay by a thicker internal granular layer (IV) and more distinct sublamination of the external pyramidal layer (III) and internal pyramidal layer (V). Other descriptions have not reported subdivision of the granular insula in the macaque ( Mesulam-1984, Paxinos-2009a ). Results of studies of the granular insula in human are also mixed. Area Ig2 of Kurth ( Kurth-2012 ), identified by automated scans of silver-stained sections of the insula, showed a similar stratifications of pyramidal layer (III) compared to area Ig1 of Kurth, but it differed topologically. It was located rostroventrally to Ig2 of Kurth, whereas Ig2 of Gallay was located caudodorsally to Ig1 of Gallay. Subdivision of the granular insula was not reported in a contemporary study of the human ( Morel-2013 ), nor in studies of the rat ( Swanson-2004 ) and mouse ( Hof-2000 ).