Definitions

Appendage (cirrus) usually with long paired setae on segments of lesser curvature and few setae distally on each articulation of greater curvature. [McLaughlin, 1980]
In cirripeds, appendage where rami of cirrus have setae arranged in linear series along lesser curvature , like a comb (cf. acanthopod, lasiopod). [Moore and McCormick, 1969]