1. This is an example of a "wurtzite" type of prolamellar body. Overall, the lattice is an hexagonal prism, and the section has sliced across it at a slight angle so that three successive planes of hexagonal rings are seen, together with two intervening layers of connecting tubules. The two small boxes show tetrahedral units as in the models alongside. The large box is shown at higher magnification at top right (see label 3).
2. This model shows how tetrahedral units in successive planes are connected with the tubules in register.
3. The large box in (1) with hexagonal outlines in two successive layers superimposed in register.
4. Animated views of two successive layers tilting through 90 degrees and then rotating through 60 degrees to show the connections within planes and between planes. (still from movie shown here)

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