Euthystylus costatus (FOSSIL) Wang, 1980 †
Melanella costellata (P. Dautzenberg& H. Fischer, 1897)
Hypermastus coxi (H.A. Pilsbry, 1899)
Hebeulima crassiceps C.F. Laseron, 1955
Eulima crassiuscula R.W. Dunker, 1887
Hemiliostraca crassula (A. Adams, 1864)
Umbilibalcis crassula P. Bouchet & A. Warén,1986
Leiostraca crassula (J.G. Jeffreys, 1839)
Eulima crossei (Š. Brusina, 1886)
Bessomia crystallina (A.A. Gould, 1846)
Leiostraca crystallina (A. Adams, 1864)
Diacolax cucumariae G. Mandahl-Barth, 1946
Melanella cumingii (A. Adams, 1851)
Melanella cunaeformis (W.L. May, 1911)
Bathycrinicola curta (A. Warén, 1972)
Vitreolina curva (T.A. de M. Monterosato,1874)
Eulima curvata A. Adams, 1861
Melanella cuspidata (C.B. Adams, 1854)
Eulima cylindrata R.B. Watson, 1883
Eulima cylindrica K.H.J. Thiele, 1925
Hypermastus cylindricus (G.B. III Sowerby, 1900)
Sabinella cysticola (F. Koehler & C. Vaney,1925)
Crinolamia dahli P. Bouchet & A. Warén,1979
Strombiformis dalli (FOSSIL) Gardner & T.H. Aldrich,1919 †
Eulimostraca dalmata J. Espinosa & J.A. Ortea,2007
Margineulima danae (FOSSIL) (Tenison Woods, 1879 †)
Eulima danica (FOSSIL) J.P.J. Ravn, 1933 †
Curveulima dautzenbergi (P.M. Pallary, 1900)
Melanella debilis (C.B. Adams, 1861)
Melanella decagyra (J.C. Melvill & R. Standen,1903)
Melanella decipiens (C. Hedley, 1899)
Eulima decussata J.G. Jeffreys, 1839
Eulima definita K.H.J. Thiele, 1925
Gasterosiphon deimatis (F. Koehler & C. Vaney,1903)
Hemiliostraca delicata (H.A. Pilsbry, 1918)