External morphology and nervous system, Peronia verruculata (unit #1), Indonesia, Sulawesi [2127] (UMIZ 00170) A anterior, ventral view B posterior, ventral view, the dotted line shows where the foot normally expands (it was partly cut to illustrate the anus, the peripodial groove, and the female pore) C dorsal gills and papillae D nervous system, dorsal view. Scale bars: 5 mm (A, B), 2 mm (C), 1 mm (D). Abbreviations: a anus, f foot, fo female opening, h hyponotum, lcg left cerebral ganglion, lpg left pedal glanglion, lplg left pleural ganglion, mo male opening, ol oral lobe, ot ocular tentacle, pn pneumostome, ppg peripodial groove, rcg right cerebral ganglion, rpg right pedal glanglion, rplg right pleural ganglion, vg visceral ganglion.