Fig. 17. The effects of position on the reflective patterns seen by observers X, Y and Z (see Fig.15). (A) At a distance of half a squid’s mantle length. F, fluorescent layers; R, ‘red’ stripe; B, ‘blue’ stripe; G, ‘green’ stripes; GP, ‘green’ patches (G and GP only for L. vulgaris). (B) For observers at a distance of 1.5mantlelengths.