Natura - nature
   actualia - actual entities
     Mundus Plinius - physical world
       naturalia - natural bodies
         "crystal-kingdom"
           chemical substances
             chemical compounds
               Class carbohydrates [Cn(H2O)n, etc.]
                 Class saccharides
                   1 Class monosaccharides - sugars
                   2 Class disaccharides - sugars
                   3 Class oligosaccharides
                   4 Class polysaccharides