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RAGAMUFFINS |
Urchins |
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SPATANGUS |
A genus of heart-shaped sea urchins belonging to the
Spatangoidea. |
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ARISTOTLE'S LANTERN |
The five united jaws and accessory ossicles of
certain sea urchins. |
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REGULARIA |
A division of Echini which includes the circular, or
regular, sea urchins. |
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PETALOSTICHA |
An order of Echini, including the irregular sea
urchins, as the spatangoids. See Spatangoid. |
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PLUTEUS |
The free-swimming larva of sea urchins and ophiurans,
having several long stiff processes inclosing calcareous rods. |
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SIPHON |
A tubular organ connected both with the esophagus and the
intestine of certain sea urchins and annelids. |
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FASCIOLE |
A band of minute tubercles, bearing modified spines, on
the shells of spatangoid sea urchins. See Spatangoidea. |
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MICRASTER |
A genus of sea urchins, similar to Spatangus, abounding
in the chalk formation; -- from the starlike disposal of the ambulacral
furrows. |
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PALEECHINOIDEA |
An extinct order of sea urchins found in the
Paleozoic rocks. They had more than twenty vertical rows of plates.
Called also Palaeechini. |
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CLYPEASTROID |
Like or related to the genus Clupeaster; -- applied
to a group of flattened sea urchins, with a rosette of pores on the
upper side. |
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LITHOPHAGOUS |
Eating or destroying stone; -- applied to various
animals which make burrows in stone, as many bivalve mollusks, certain
sponges, annelids, and sea urchins. See Lithodomus. |
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ECHINOIDEA |
The class Echinodermata which includes the sea
urchins. They have a calcareous, usually more or less spheroidal or
disk-shaped, composed of man... |
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SPATANGOIDEA |
An order of irregular sea urchins, usually having
a more or less heart-shaped shell with four or five petal-like
ambulacra above. The mouth is ... |
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ROSETTE |
...y, the
group of five broad ambulacra on the upper side of the spatangoid and
clypeastroid sea urchins. See Illust. of Spicule, and Sand dollar,
... |
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SPHAERIDIUM |
A peculiar sense organ found upon the exterior of most
kinds of sea urchins, and consisting of an oval or sherical head
surmounting a short ped... |
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TANGLE |
...ar to
which are attached swabs, or bundles of frayed rope, or other similar
substances, -- used to capture starfishes, sea urchins, and other
... |