FIGURES 2–7. Korotkevitschia pelagica. 2, Oblique section through a in Redescription of Korotkevitschia pelagica (Korotkevitsch, 1961) (Enopla: Hoplonemertea: Cratenemertea), a pelagic nemertean from Antarctica

FIGURES 2–7. Korotkevitschia pelagica. 2, Oblique section through a frontal organ. FO, frontal organ. Cephalic retractor muscles are indicated by arrows. 3, Oblique section to show body diagonal muscles, indicated by arrows. 4, Oblique section through the stomach wall. The stomach protrusion is indicated by the black arrow, the longitudinal fibres around the stomach wall are indicated by white arrows; ST, stomach. 5, Oblique section through the canal of the cerebral organ. The sensory canal is indicated by an arrow, the radial fibres are indicated by arrowheads. BR, brain; CO, cerebral organ. 6, Oblique section through the anterior part of the rhynchodaeum. The circum­rhynchodaeal glands are indicated by an arrow. RD, rhynchodaeum; ST, stomach. 7, Oblique section through the rhynchocoel wall.