
Halysites (meaning chain coral) is an extinct genus of tabulate coral. Colonies range from less than one to tens of centimeters in diameter, and they fed upon plankton. ...
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http://en.wikipedia.org/wiki/Halysites

• (n.) A genus of Silurian fossil corals; the chain corals. See Chain coral, under Chain.
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http://thinkexist.com/dictionary/meaning/halysites/

extinct genus of corals found as fossils in marine rocks from the Late Ordovician Period to the end of the Silurian Period (458 to 408 million years ...
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http://www.britannica.com/eb/a-z/h/9
Hal`y·si'tes (hăl`ĭ*sī'tēz)
noun [ New Latin , from Greek
'a`lysis a chain.]
(Paleon.) A genus of Silurian fossil corals; the chain corals. See
Chain coral , under
Chain .
Found on
http://www.encyclo.co.uk/webster/H/9
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