FIGURE 3.

Regressions of relative head, tail, and trunk lengths, expressed as percentages of total body length in Agkistrodon conanti. Regression equations are % TL = 13.112–1.789 ln TL (R² = 0.955) for head length; % TL = 17.56–.012 TL (R² = 0.146) for tail length; and %TL = −1.832 + 0.807 TL (R² = 0.999) for trunk length. Note that the relationship for trunk length is essentially isometric