Typical barnacles, common name of the sedentary crustacean marine animals constituting the subclass Cirripedia, attach to the substrate by means of an exceedingly adhesive cement, produced by a cement gland, and secrete a shell, or carapace, of calcareous (limestone) plates, around themselves. [ http://purl.obolibrary.org/obo/BTO_0002738 ]
This is just here as a test because I lose it