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 "Stalactites"
                 1 "Stalactites argillae calcareae"
                 2 "Stalactites calcis nitrosae"
                 3 "Stalactites qvartzi"