Figure 5. Longitudinal section of the cerebral vesicle in larvae of 12,5 days. neu, tegmental neuropile; if, infundibular cells; lmb, lamellar body; lc, lamellate cells; tc, tectal cells; pmc, primary motor centre; cb, ciliary bulb cells; preinfundibular projection neurones (PPN1-2); in black are pigment cells of frontal eye; R1, R2, R3, rows of photoreceptor cells and associated neurons; (redrawn from Lacalli & Kelly, 2000).