Fig. 4

Organization the cerebral ganglion of Crisia eburnea at different levels (TEM). In all pictures, the envelope cells are marked by magenta. a-c Transverse thin sections. a The middle portion of the ganglion is formed by perikarya whose cytoplasm is filled with electron dense vesicles. b The lower portion contains two lateral perikarya that are associated with neurites of lateral weirs. c The lower portion of neuropil. Abbreviations: ac – accessory centriole; bb – basal body; G – Golgi apparatus; cc – central cell; lnp – lower neuropil; lpk – lateral perikaryon; m – mitochondria; mc – muscle cell of the pharynx; nlw – neurites of lateral weirs; pcc – projection of central cell; ph – cells of the pharynx; pk – perikaryon; v – vesicles with dense material