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Fig. 2. Weaving pattern of N. succinea upon encountering a trail of
glutathione at an oblique angle. The concentration of glutathione in the
syringe was 10–5 mol l–1, yielding a trail
(gray streak) concentration somewhat less than 10–6 mol
l–1. (A–F) Successive images of the path swum by the
animal (indicated by the broken line in F). The total time between images A
and F was 3 s. The 10 cm calibration applies to all parts.