Fundamental patch of Pa, and 1/8 unit cell.
Below: A cubic unit cell of Pa, and the generating unit (framework I minimally spanned), viewed along a threefold axis, and a pair of fundamental patches indicating the reason for the name ‘batwing’.

The generating patch and the
unit cell of Pb

The generating unit for Da and, below,
the portion of the surface inside a
rhombic dodecahedron whose faces
are mirror planes.