Abstract
The adult of Nybelinia surmenicola OKADA in DOLLFUS, 1929 (Cestoda: Trypanorhyncha: Tentaculariidae) is described and illustrated for the first time. The sample was obtained from the stomach of the salmon shark, Lamna ditropis HUBBS et FOLLETT, taken in the Bering Sea. A morphological comparison is briefly made of the cestode specimens in different developmental stages colected from the euphausiids, squid, walleye pollock and salmon shark, and a possible life-history of N. surmenicola is discussed.
