This species[80] is not more than three inches in length; but there
is another[81] much less common, which is larger, richer in colours,
and altogether a finer species. A specimen which I lately found was
about a foot in length when crawling, and nearly a quarter of an inch
in width. The whole body was divided into distinct segments, which in
this individual were about two hundred and ten in number; though,
according to MM. Audouin and Milne Edwards,[82] they sometimes amount
to nearly five hundred, and the worm has been found two feet in length.
The head is small, terminated by two pairs of very minute antennæ, but
surrounded at what we may call the neck by four pairs of rather long
feelers (tentacular cirri), with a fifth pair which are minute and
rudimentary.
[Illustration: