"* Caecum vitreum var. clarkii Carpenter, 1859 (basionym)" . . . . . "Caecum clarkii is a species of minute sea snail, a marine gastropod mollusk or micromollusk in the family Caecidae."@en . "* Caecum sardinianum de Folin, 1870" . "* Caecum orientale de Folin, 1868 (dubious synonym)" . . "Caecum clarkii"@en . . "* Caecum semitracheum Monterosato, 1884" .