Fig. 5
From: Discrete or indiscrete? Redefining the colour polymorphism of the land snail Cepaea nemoralis
Axes of chromatic variation in the shell of C. nemoralis, using avian visual space. Units on x, y and z axes are in JNDs. a and b represent snails from a “Beeston” population sample, with individual points coloured yellow, pink or brown according to human a or Mclust b classification of the shell. Similarly, c and d represent snails from the “Bathhill” sample, with individual points coloured to human c or Mclust d classification of the shell. See also Supplementary Movies 3 to 6
