Figure 4

Histological cross-sections of P. cornuta. A: eye and rhinophoral ganglion. B: cerebral and optic ganglia. C: pleural, parietal and fused subintestinal/visceral ganglion. D: pharynx and basal finger. E: buccal ganglion and penial stylet. F: female gonopore and membrane gland. Abbreviations: am, ampulla; ao, aorta; apg, anterior pedal gland; bf, basal finger; bg, buccal ganglion; bst, stylet of basal finger (base); cg, cerebral ganglion; dg, digestive gland; ed, ejaculatory duct; ey, eye; fgo, female gonopore; i, intestine; k, kidney; ltn, labial tentacle nerve; meg, membrane gland; nd, nephroduct; oe, oesophagus; og, optic ganglion; oo, oocyte; osn, osphradial nerve; ot, oral tube; otg, oral tube gland; p, penis; pag, parietal ganglion; pg, pedal ganglion; ph, pharynx; plg, pleural ganglion; pn, pedal nerve; ppd, paraprostatic duct; pr, prostate; ps, penial sheath; pst, penial stylet; r, radula; rhg, rhinophoral ganglion; s, statocyst; sgd, salivary gland duct; sgl, left salivary gland; sgr, right salivary gland; st, stylet of basal finger (tip); subg, subintestinal ganglion; vd, vas deferens; vdp, posterior-leading vas deferens; vg, visceral ganglion; *, gastro-oesophageal ganglion.