Fig. 5. Cell extensions over ingressing cells. (A) Scanning electron micrograph of the ventral surface of a 28-cell embryo, anterior is to the left. (B) Tracing of A to indicate cell names. The exposed apical surfaces of the ingressing E daughters are tinted. (C) High magnification of the region corresponding to the boxed area in B. The arrow indicates the thin, leading process from an MS descendant.