Revision of the northeast Atlantic bathyal and abyssal Mesogastropoda

Fourth volume of this important series. The families examined are: Cerithiidae, Cerithiopsidae, Triphoridae, Rissoidae, Iravadiidae, Elachsinidae, Aporrhaidae, Hipponicidae, Vanikoridae, Haloceratidae, Capulidae, Velutinidae, Lamellariidae, Ovulidae, Naticidae, Laubierinidae, Ranillidae, Tonnidae and Cassidae. All species are illustrated and described.