Arenicola marina, commonly called the lugworm or sandworm, is a marine, burrow-dwelling worm. Lugworms ingest
                         sediment while in the burrow, leaving a depression on the surface sand. Once the sediment is stripped of its useful organic
                         content it is expelled, producing the characteristic worm cast found on beaches.

                         The name Arenicola basically means ‘sand-dweller’ – from the Latin arenarius, pertaining to sand, and the suffix –cola meaning
                         dweller or inhabitant.  It was originally named Lumbricus marinus by Linnaeus in 1758, but the generic name was changed to
by Lamarck in 1801. Elford Leach named two species of lugworms in 1816 – Arenicola tinctoria and Arenicola carbonaria.
                         However both of these turned out to be variants of the original Arenicola marina and are not currently accepted names.

                         The term Arenicola was obviously known to Leach and his “Caroline/Carolina” anagrams may have been derived from it. 
                         The letters in Arenicola contain both an ‘e’ and two ‘a’s, encapsulating both ‘Caroline’ and ‘Carolina’ in one word.