Species of the genus Carpocanium and closely related ones.
I-IV) C. obliqua, surface layer of the bottom sediment, Mediterranean Sea, “Vavilov”, station 834 (4 specimens with various formations of the aperture); V) C. amphora, plankton, Indian Ocean “Obj”, 69th sample of suspension; VI) C. cf. diadema, surface layer of the sediment, Mediterranean Sea, “Vavilov”, station 834; VII, VIII) Carpocaniidae gen. sp.: VII) from the same sample as VI); VIII) surface layer of the sediment, Pacific Ocean, “Vityaz”, station 5117.