(from Gibson, R. (2002). The invertebrate fauna of New Zealand: Nemertea (ribbon worms).. Jan-89.)
Single pair of short, shallow lateral horizontal cephalic furrows; proboscis unbranched, with outer longitudinal, middle circular and inner longitudinal muscle layers, and one muscle cross; rhynchocoel extending to posterior end of body, its circular muscles not interwoven with adjacent body-wall longitudinal muscles; dorsal fibre core of cerebral ganglia forked only at rear into upper and lower branches; brain lobes with neither distinct outer neurilemma nor neurochord cells; foregut with neither somatic muscles nor subepithelial gland cell zone; longitudinal muscle plate between rhynchocoel and foregut missing; lateral blood vessels developed into a vascular network around foregut; dermis without connective tissue layer separating glandular region from body-wall outer longitudinal musculature; caudal cirrus present; apical organ consisting of three sensory pits; frontal glands present, small and in four groups; eyes absent; excretory system absent; sexes presumed separate.
