Slide showing a diagramatical drawing of 'parapodium of a male "heteronereis" of N.pelagica L.x10'. Slide shows a diagramatical drawing of 'parapodium of a male "heteronereis" of N.pelagica L.x10'. The diagram is labelled with the following corresponding key: 'Fig 147 - parapodium of a male "heteronereis" of N.pelagica L.x10 (from Ehlers). a, Notopodial cirrus ; b, Notopodium ; c, Neuropodium with new chaetae ; c', Foliaceous outgrowth ; d, Neuropodial cirrus ; x, y, Foliaceous outgrowths.' Heteronereis - a free-swimming, dimorphic, sexual form of certain species of Nereis. Late 19th to early 20th century