1. Tectal Beaking refers to the fusion of the midbrain colliculi into a single beak pointing posteriorly and invaginating into the cerebellum

2. The inner germ‐band layer is formed by invagination of cells from a median Blastoporic groove and by cellular proliferations among the invaginating cells and from the median line of the ectoderm immediately caudad of the Blastoporic groove