Family: Cirri in 2 marginal, 1 frontoventral files; cirral files straight;
more than 1 frontoventral file extends past middle of body (Illustrated Guide, 1985).
Genus: Elongate, some species with a pronouced head region; body often twistes and flexes during locomotion;
three rows of ventral cirri (2 rows of marginal cirri, 1 row of ventral cirri from Curds, 1982);
frontal & V-shaped transverse cirri; transverse cirri may be very long
extending beyond the posterior (Carey, 1992).
Species:
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