Fig. 1. Schematic drawing of the semi-intact preparation and perfusion dish. During some experiments, the gap in the centre of the dish was perfused with sucrose to reduce efferent traffic in the intestinal nerve; otherwise, all tissues were bathed in saline. AG, albumen gland; CNS, central nervous system; D, distal; DG, digestive gland; HD, hermaphroditic duct; LCe, left cerebral ganglion; OT, ovotestis; P, proximal; RCe, right cerebral ganglion; RPa, right parietal ganglion; SV, seminal vesicle; V, visceral ganglion.