| Description | Slide shows two microsopic photographs of 'the primordium of brain and optic vesicles of Bombinator, prepared by means of glass needles and hair loops after fixation.'
Bombinator is a European genus of toad.
Photographs are labelled 'a' and 'b'.
Title below image reads 'Fig. 20. a and b. Primordium of brain and optic vesicles of Bombinator, prepared by means of glass needles and hair loops after fixation: a, as seen from above; b, as seen from the right side. (After Spemann, unpublished)'. |