[Diphyllobothrium skriabini sp. n. (Cestoda: Diphyllobothriidae)--a parasite of the bearded seal (Erignathus barbatus Erx.)].

A new species of cestodes is described from the intestine of Erignathus barbatus Erx. The species differs from the other members of the genus in the shape of scolex, the character of strobilation and in many other characters. Data are given on its morphological variability in different waters: the Greenland and East Siberian Seas, the Bering Strait. Two subspecies, D. s. europeum and D. s. asiaticum, are erected. The species is named in honour of Professor A. S. Skriabin, one of the most outstanding workers in the field of helminthology of marine mammals.