(1) Specimens of the centipede Lithobius variegatus Leach collected from a contaminated deciduous woodland 3 km downwind of a primary smelting works, and a similar but uncontaminated site, were fed ...

Now Lithobius is almost invariably nocturnal, and can only be found in day-time underneath stones and piles of dead leaves. That it is negatively phototactic and positively thigmotactic has been ...

Miss S. D. KING in her note on the oogenesis of Lithobius published in NATURE of July 12, p. 52, says: “Yolk formation is from nucleolar extrusion, of which two phases can be distinguished; first, an ...