“…Populations on sandy and muddy shores have been described by Stephen (1929a), Elmhirst (1931), Pirrie, Bruce & Moore (1932), Rees (1939), Watkin (1942), and Brady (1943). Besides these general surveys, there have been more intensive studies of certain species, such as those of Stephen (1928Stephen ( , 1929aStephen ( , b, 1931Stephen ( , 1932 on the biology of Tellina tenuis and certain other lamellibranchs.…”