 The buccal ganglia are positioned posterior to the pharynx and are linked to each other by a short buccal commissure ventral to the oesophagus.The thin cerebro-buccal connective emerges anteriorly from each buccal ganglion and was not traceable along the entire length.A smaller gastro-oesophageal ganglion lies dorsally to each buccal ganglion and is connected to the latter by a short connective.