When
the sea is agitated, the jelly-fish is driven helplessly along. It
cannot choose its path. As its food, however, is everywhere abundant
around it, and it has no business that should lead it in one direction
more than another, there is no great hardship in this.
In this section are included some of the most beautiful, as well as
common of the tribe. The forms of the umbrella are often most lovely,
and present an astonishing variety. As an example of the beauty which
they sometimes display, we may refer to a species which resembles an
exquisitely formed glass-shade, ornamented with a waved and tinted
fringe. The most perfect grace of form, the transparency of the
crystal, and colour as delicate as that of the flower, combine to
render this frail being one of the loveliest of living things.
In another section, locomotion is effected by a modification of
ciliary apparatus. We have a familiar example in the _Beroe_ of our
own seas, a most attractive little being, and a prime favourite with
naturalists, who have described its habits and celebrated its beauty
with enthusiasm.
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