Fig. 6. Diagram of the early ns (A) and nf (B) blast cell lineages (non-linear time scale). Cell nomenclature is adapted from C. elegans as described previously (Huang et al., 2002). anterior, a; posterior, p; medial, m; lateral, l; superficial, s; deep, d. The cl.ag. given for each division represents the average of observations drawn from three to five specimens in each case. Numbers correspond to the cells in Fig. 5B.