Rat: E16-hor-489 1 = Myencephalon (transition spinal cord,  2 = Wall mesencephalon,  3 = Ear placode,  4 = Otocyst,  5 = Hypothalamus,  6 = Thalamus,  7 = Corpus striatus,  8 = Lateral ventricle,  9 = Ganglion. Rager staining. Horizontal section acquired with a 2.5x objective

http://www.vcbio.science.ru.nl/en/virtuallessons/embryology/rat-E16-hor-489/print/