Chlamylla intermedia (Bergh, 1899). ZMMU Op-480. White Sea, Cape Kartesh, living animal 23 mm in length: A dorsal view B lateral view C ventral view D details of cerata E living animal and its egg masses on a Tubularia stem F jaw, SEM G details of masticatory process of jaw, SEM H radular teeth, posterior part, SEM I reproductive system J details of external penial collar K details of penis inside of penial sheath. Abbreviations: a anus am ampulla nc continuous notal edge p penis pc penial collar (external) pr prostate ps penial sheath vd vas deferens (muscular part). Scale bars: F = 300 μm; G = 30 μm; H = 100 μm. Photos and SEM images by T.A. Korshunova, A.V. Martynov.