• An ascidian
    An ascidian
  • Chambers's Twentieth Century Dictionary
    • Ascidians a-sid′i-anz a group belonging to the tunicate Mollusca, forming a class of degenerate survivors of ancestral vertebrates, asymmetrical marine animals with a tubular heart and no feet, of a double-mouthed flask shape, found at low-water mark on the sea-beach
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Additional illustrations & photos:

Ascidians Ascidians


Chambers's Twentieth Century Dictionary
Gr. askidion, dim. of askos, a leathern bag, wine-skin.


In literature:

And we learn all about ascidians, too.
"Scientific American Supplement, No. 363, December 16, 1882" by Various
Organ-Forming Substances in the Eggs of Ascidians.
"Taboo and Genetics" by Melvin Moses Knight, Iva Lowther Peters, and Phyllis Mary Blanchard
Many other Ascidians pass their whole life as pelagic creatures.
"Thomas Henry Huxley; A Sketch Of His Life And Work" by P. Chalmers Mitchell
He pointed out also that the "notochord" was confined to the tail of the ascidian larva.
"Form and Function" by E. S. (Edward Stuart) Russell
Ascidians, placental structure, 81.
"On the Genesis of Species" by St. George Mivart
In each of us there slumber all the impressions of all our predecessors, up to the earliest Ascidian.
"'That Very Mab'" by May Kendall and Andrew Lang
This animal seems to have been more like the larvae of the existing marine Ascidians than any other known form.
"Little Masterpieces of Science:" by Various
Male and female reproductive organs exist in each ascidian.
"The New Gresham Encyclopedia. Vol. 1 Part 2" by Various
GOODSIR, Prof., on the affinity of the lancelet to the ascidians, i.
"The Descent of Man and Selection in Relation to Sex" by Charles Darwin
Ascidians, tunicate animals, 46.
"The Biological Problem of To-day" by Oscar Hertwig
Gregarines are essentially parasites of Invertebrates; they are not known to occur in any true Vertebrate although met with in Ascidians.
"Encyclopaedia Britannica, 11th Edition, Volume 12, Slice 5" by Various
A great sensation was caused by the first discovery of a poor relation of the vertebrates among the Ascidians, or Leather-bottle animals.
"Stories of the Universe: Animal Life" by B. Lindsay
By means of this current the ascidian obtains food.
"Elementary Zoology, Second Edition" by Vernon L. Kellogg

In poetry:

To cut men's throats to help them count their votes
Is asinine--nay, worse--ascidian folly;
Blindness like that would scare the mole and bat,
And make the liveliest monkey melancholy.
"How To Not Settle It" by Oliver Wendell Holmes