Encyclopaedia Britannica, 11th Edition, "Armour Plates" to "Arundel, Earls of"

2. As regards the limbs. Reduction of the ulna from a complete and

distinct bone to a comparatively rudimentary state in which it coalesces more or less firmly with the radius. Reduction of the fibula till nothing but its lower extremity remains. Reduction and final loss of outer pair of digits (second and fifth), with coalescence of the metacarpal and metatarsal bones of the two middle digits to form a cannon-bone. Union of the navicular and cuboid, and sometimes the ectocuneiform bone, of the tarsus.