At stage 40, staining is absent from the notochord, but prominent in lateral line, proctodeum, stomodeum and nasal pits. Goodrich's sketch of fish lateral line . Antibody 2G9 also stains the lateral line Xenopus A. B. C. A. Stage 38 lateral view of anterior end. B. Closer shot of the head stain in the infraorbital lateral line. The more posterior row of stained cells is probably the mandibular line.
Nasal pit is also obvious, even though out of focus.
Axolotl A. B. C. A. Stage 38 nasal pit, dorsal view .