FIGURES 15–20. Korotkevitschia pelagica. 15 in Redescription of Korotkevitschia pelagica (Korotkevitsch, 1961) (Enopla: Hoplonemertea: Cratenemertea), a pelagic nemertean from Antarctica

FIGURES 15–20. Korotkevitschia pelagica. 15, Oblique section through the anterior part of stomach to show the mouth opening, indicated by an arrow. ST, stomach. 16, Transverse section through pylorus, indicated by an arrow. IC, intestinal caecum; PR, proboscis. 17, Transverse section through the middle region of the body. Lateral nerve cords are indicated by arrows. IN, intestine. 18, Transverse section through the middle part of the rectum. The mid­dorsal blood vessel is indicated by an arrow. LN, lateral nerve cord, RE, rectum. 19, Transverse section through the posterior part of the rectum showing sphincter of circular muscle (indicated by arrows). PC, posterior commissure of the nerve cords. 20, Transverse section through the testis. A lateral blood vessel is indicated by an arrow. IN, intestine; LN, lateral nerve cord; TE, testis.