Natura - nature
   actualia - actual entities
     Mundus Plinius - physical world
       naturalia - natural bodies
         "Lapideum Regnum" nom. inval. - mineral kingdom
           Class "Fossilia" nom. inval. - Lapides aggregati
             Order "Concreta" - rocks
               Genus "Pumex"
                 1 "Pumex Vegetabilium ater"
                 2 "Pumex Pyritae cinereus"
                 3 "Pumex Terrae cinereus"
                 4 "Pumex Cupri ruber"
                 5 "Pumex Argillae cinereus"