(Chapter ad) Footnote 22:

The 1555 edition adds the following: “The bone of the head numbered eighth [os ethmoidale], compared to a seive or strainer and by some to a sponge, for that reason called h)qmoeide/j and spoggoeide/j and popularly named cristatum, “crested,” appears nowhere in these three plates representing the entire structure of the bones since it occurs only in the inner space of the skull, as shown in the eighth figure of the sixth Chapter at A, B, A. But perhaps, because it forms the septum of the nostrils [os ethmoidale, lamina perpendicularis] outside the space mentioned, one might argue that it is seen to a degree.”