Cellular innervation patterns of the cerebral nerves in Aplysia spp. Schematic outline of somata and their axons projecting into the N1 (A), N2 (B), N3 (C) and Nclc (D). The size and position of the somata are digitalized from camera lucida drawings, the distribution of the axons are averaged over all replicates. CG - cerebral ganglia, N1 - Nervus oralis, N2 - Nervus labialis, N3 - Nervus rhinophoralis, Nclc - Nervus clypei capitis, N. Opt. - Nervus opticus, , PdG - pedal ganglia, PlG - pleural ganglia.