A part only of the thickenings are filled with lime granules.
These occur as thickenings and down-growths of the epithelium into the corium.
The olfactory pits are barely indicated as thickenings of the nervous layer of the epiblast.
He saw these thickenings of the fog, he heard their voices, the tapping of their cautious sticks, their shuffling feet as well.
In the new wing, ...