Orona = Hilly or tuberculate shell; ὄρος, ὠνή.
Orosphæra = Sphere with hilly elevation; ὄρος, σφαῖρα.
Oroscena = Shell with tent-shaped elevations; ὄρος, σκηνή.
In the plate the number is omitted by mistake. The figure is above in the middle.
Oroplegma = Hilly shell of framework; ὄρος, πλέγμα.