Which preposition to use with hexagonal

in Occurrences 1%

""But there were really curious remains of the old Globe Playhouse, which, though hexagonal in form without, was round within, as circles contain more space than other shapes, and Bees make their cells in hexagons only because that figure best admits of junction.

under Occurrences 1%

In the Turtle the ovary is made up of such cells, spherical at first, but becoming hexagonal under pressure, when they are more closely packed together.

Which preposition to use with  hexagonal