 Oesophageal gland or oesophageal pouch is a part of the digestive system of some gastropods.Oesophageal gland or pouch is a common feature in so-called basal gastropod clades, including Patelloidea, Vetigastropoda, Cocculiniformia, Neritimorpha and Neomphalina.The size of oesophageal gland of scaly-foot gastropod "Chrysomallon squamiferum" (family Peltospiridae within Neomphalina) is about two orders of magnitude over the usual size.