The form of these animals differs from all of the 600 types described up until now. They possess the shape of a Beinsdorff still. The head of the tube is a sort of proboscis, the inside of which is filled with fine bristles 1/2000th of a line long.
1564 - 1616
1803 – 1882
1854 – 1900
1942 – 2016
1928 – 2014
1835 – 1910
1869 – 1948
1884 – 1962
1898 – 1963
1929 – 1993
1879 – 1955
1809 – 1865