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On the Visual System of Nautilus Pompilius

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Figure

Fig. 1. Planes in which sections were cut. The upper black rectangle shows the plane of a meridionalsection, the lower black rectangle the plane of a parallel section.
Fig. 2. Optomotor apparatus. The inner glass vessel containing the animal is 25 cm in diameter,which gives the scale.
Fig. 3. Gross dimensions of the eye. (A) Vertical section, (B) horizontal section, (C) view of fundus.In (A) and (B) the arrows indicate the limits of the retina, which is shown black, and the dashed lineshows where the optic stalk was cut.
Fig. 4. Approximate positions on the retina at which the data given in Table 1 were obtained
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