A group of annelids, so called because the species composing it have no special organs of respiration.
Producing only asexual individuals, as the eggs of certain annelids.
Having two kinds of young, as certain annelids. a
One of the shieldlike dorsal scales of certain annelids. See Chaetopoda.
A group of chaetopod annelids, including those that are not confined to tubes
