The actual amount of the variation is very great, ranging from one-sixth of the mean length in the neck to considerably more than a fourth in the hind leg, and this among only fourteen examples which happen to be in a particular museum.
To prove that this is not an isolated case, Professor Milne Edwards also gives a table showing the amount of variation in the museum specimens of six common species of lizards, also taking the head as the standard, so that the comparative variation of each part to the head is given.

In the accompanying diagram (Fig.

2) the variations are exhibited by means of lines of varying length.

It will be understood that, however much the specimens varied in _size_, if they had kept the same _proportions_, the variation line would have been in every case reduced to a point, as in the neck of L.velox which exhibits no variation.

The different proportions of the variation lines for each species may show a distinct mode of variation, or may be merely due to the small and differing number of specimens; for it is certain that whatever amount of variation occurs among a few specimens will be greatly increased when a much larger number of specimens are examined.