|The family Hancockiidae
includes elongate dendronotaceans with a series of dorso-lateral
lobes or cerata on the notum that split into rosettes of finger-like
processes. The rhinophores are retractile and the oral veil
bears finger-like processes on each side. They feed on hydroids and, in
this unusual family, nematocysts are stored in
the rhinophoral sheaths as well as the cerata. One species is known
from Hawaii in the genus Hancockia.