Borealia sanamyanae sp. n. ZMMU Op-518. Kurile Islands, Matua Island, living specimen 5 mm in length: A latero-ventral view B dorsal view (fixed) C ventral view (fixed) D jaw, SEM E details of masticatory process of jaw, SEM F details of masticatory process of jaw, light microscopy G radular teeth, posterior part H reproductive system (non-mature), light microscopy. Abbreviations: a anus fgm female gland mass nc continuous notal edge pvd prostatic vas deferens. Scale bars: D = 300 μm; E, G = 30 μm. Photos of living specimens by N.P. Sanamyan, other photos and SEM images by A.V. Martynov.