Fig. 1. The C. elegans hermaphrodite postembryonic M lineage. Times indicated are hours post-hatching at 25°C. (A) The M lineage with all the differentiated cell types (modified from Sulston and Hovitz, 1977). The corresponding stages referred to in the paper are indicated on the right. (B) A schematic lateral view of the M lineage through larval development. D, dorsal; V, ventral; L, left; R, right; A, anterior; P, posterior.