Polychaeta is the largest class within Phylum Annelida. This class is primarily composed of Marine worms.
Campbell & Reece. "Biology" Benjamin Cummings. 6th Edition, 661
Miller & Harley. "Zoology" McGraw Hill. 7th Edition, 212-217
Pol`y*chae"ta (?), n. pl. [NL., from Gr. many + hair.] Zool.
One of the two principal groups of Chaetopoda. It includes those that have prominent parapodia and fascicles of setae. See Illust. under Parapodia.
© Webster 1913.
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