Vol. 34, No. 116, p. 89-91, Figs 5, 6, and 7

The illustrations and captions for Figures 5, 6, and 7 have been transposed. The illustration above the caption for Figure 5 is in fact Figure 7; the illustration above the caption for Figure 6 is in fact Figure 5; the illustration above the caption for Figure 7 is in fact Figure 6.