Systema naturæ - nature
   Universum - universe see [unranked] Mundus Plinius
     naturalia - natural bodies
       Regnum Lapideum - mineral kingdom
         Class Fossilia nom. inval. - Lapides aggregati
           Order Concreta - rocks
             Genus Calculus
               1 Calculus salivæ dentium
               1.0 Tartarus dentium see Calculus salivae dentium
               2 Calculus gastrici animalium pecorum
               2.0 Ægagropila see Calculus gastrici animalium pecorum
               3 Calculus Bilis cystidis
               3.0 Calculus felleus see Calculus Bilis cystidis
               4 Calculus urinæ humanæ
               4.0 Calculus nephriticus see Calculus urinae humanae
               5 Calculus urinæ Simiarum, Caprorum &c.
               5.0 Bezoarticus Lapis see Calculus urinae Simiarum, Caprorum &c.
               6 Calculus insecti Astaci
               6.0 Oculi cancrorum see Calculus insecti Astaci
               7 Calculus vermis conchæ - pearl
               7.0 Margarita Linnaeus, 1735 - pearl see Calculus vermis conchae