OTIC AND OPTIC PRIMORDIA IN MAN miles 
completely separated from the neural tube. This separation 
was apparently not so complete in the fifteen-somite embryo of 
Giglio-Tos (’02). 
Fig. 8 A photomicrograph of the twenty-ninth section of the twelve-somite 
embryo H 197 (University of California Coll.). 100. The section passes hori- 
zontally through the hindbrain region. On the right of the figure the whole 
rostrocaudal extent of the otic plate appears with the beginning of the otic pit. 
The relations of the underlying acousticofacial ganglion (ac.fac.gang.) to it and 
to the neural folds are well shown. It will be seen that the neural fold is thinner 
where the ganglion has separated off. 
