Natura - nature
   actualia - actual entities
     Mundus Plinius - physical world
       naturalia - natural bodies
         "Lapideum Regnum" nom. inval. - mineral kingdom
           Class "Petrae" - stones
             Order "Vitrescentes" - glassy stones
               Genus "Cos"
                 1 "Cos particulis inaequalibus rigidis"
                 2 "Cos particulis aequalibus friabilibus"
                 3 "Cos aquam filtrans"