Figure 3.

Contour plot of F(η, ζ) with straight lines ζ = η superimposed. The dashed line is the line η = ζ². ∗, ■, and ⧫ denote three of the cases discussed in the text: the mature oocyte, the immature oocyte, and the myocyte in overload, respectively. The latter two are such that η > ζ² and thus correspond to saltatory waves. For ∗, η ≪ ζ², and the propagation is continuous.