Complex sentence: Haplodrili (so called by Lankester), often called Archiannelida (Hatschek), is an interesting lowly-organized marine worms, whose affinities are very doubtful (see Chaetopoda).
Split into simpler sentences: Haplodrili (so called by Lankester), often called Archiannelida (Hatschek), is an lowly-organized marine worms. Its affinities are very doubtful (see Chaetopoda).