|Description||Slide shows four diagrams demonstrating 'the process of neurulation in Urodeles'.|
Diagrams are labelled 'a' to 'd'.
Diagrams are also numbered but there is no corresponding information about the numbers.
Text below slide reads:
'Fig 8 - The process of neurulation in Urodeles, revealed by movement of intra vitam stain marks placed on the surface of the gastrula in a transverse line across the animal hemisphere. a, Seen from the dorsal side. b, From the right side. c, With the progress and completion of gastrulation, the band of stain marks becomes u-shaped, the arms parallel with one another along the dorsal side, and marking the site of formation of the neural folds (d). (After Goerttler, Arch. Entwmech. cvi, 1925, modified.)'