Fig. 4. Stride durations (A), relative stride lengths (B) and velocity (C) for ramp-to-water (filled circles) and water-to-ramp (open squares) sequences. Values are means ± 1 S.E.M. During the individual strides Ramp 2 and 3, the newt is completely out of water; in Water 2 and 3, the newt has all four limbs in the water. The transition between media occurs in strides Ramp 1 and Water 1. Arrows indicate the direction of locomotion.