Fig. 23. Characteristics of lineage 21. (A) Ventral view of the projection of a MARCM clone of lineage 21. (B,C) Thick section projections showing the relationship of the neurite bundles from lineage 21 to features of the Neurotactin scaffold (red) in ventral neuropil. (B,C) Progressively more ventral regions of bundle 21. Bundle 21 converges with bundles 20 and 22 but arcs medially, when compared with the lateral arc of the other two bundles. Numbers identify neurite bundles from other lineages. Diagrams as in Fig. 2. VA, ventral arch. Commissure abbreviations as in Fig. 1.