Figure 3From: A new sensory organ in “primitive” molluscs (Polyplacophora: Lepidopleurida), and its context in the nervous system of chitonsThe anterior commissure in L. rugatus , showing internal fibre region and peripheral cell bodies. The commissure (brain; com) is the anterior expansion of the oesophageal nerve ring; a cross section shown here extends between the chevrons, with internal neuropil surrounded by dark nuclei. Com, anterior commissure, also bracketed with chevrons; oes, supraoesophagial pouch epithelium; sh, shell.Back to article page