Phorculellus Sacco 1897

Sacco 1897. I Molluschi dei terreni terziarii del Piemoute e della Liguria. Pt. XX (Caecidae, Vermetidae, Siliquariidae, Phoridae, Calyptraeidae, Capulidae, Hipponycidae, Neritidae, and Neritopsidae), 65 pp., 5 pls. Pt. XXI (Naricidae, Modulidae, Phasianellidae, Turbinidae, Trochidae, Delphinulidae, Cyclostrematidae, and Tornidae), 64 pp., 4 pls. Pt. XXII (Pleurotomariidae, Scissurellidae, Haliotidae, Fissurellidae, Tecturidae, Patellidae, Oocorythidae, Cyclophoridae, Cyclostomidae Aciculidae, Trun-catellidae, Actaeonidae, Tornatinidae, Scaphandridae, Bullidae, Cylichnidae, Philinidae, Umbrellidae, Pulmonata, Amphineura Scaphopoda), 148 pp., 10 pls. Pt. XXIII (Ostreidae, Anomiidae, and Dimyidae), 66 pp., 11 pls. Pt. XXIV (Pectinidae), 116 pp., 21 pls. 1897: Unpaginated