Balcis cetia (FOSSIL) W.P. Woodring, 1970 †
Melanella chariessa (A.E. Verrill, 1884)
Eulima chascanon R.B. Watson, 1883
Sabinella chathamensis P. Bartsch, 1917
Eulima chaunax R.B. Watson, 1883
Nanobalcis cherbonnieri A. Warén, 1990
Niso chevreuxi P. Dautzenberg, 1891
Haliella chilensis P. Bartsch, 1917
Eulima chionea P. Bouchet & A. Warén,1986
Polygireulima chipolana (FOSSIL) (C.J. Maury, 1910 †)
Entocolax chiridotae O.A. Scarlato, 1951
Vitreolina chondrocidaricola A. Warén, B.L. Burch& T.A. Burch, 1984
Margineulima christyi (FOSSIL) (J. Marwick, 1924 †)
Melanella chrysallida (C.B. Adams, 1861)
Apicalia chuni K.H.J. Thiele, 1925
Melanella chydaea (R.B. Watson, 1883)
Eulima chyta R.B. Watson, 1883
Annulobalcis cicatricosa (A. Warén, 1981)
Echiuroidicola cicatricosa A. Warén, 1980
Melanella cifara (P. Bartsch, 1915)
Melanella cinca W.H. Dall, 1927
Eulima cinctella (C.B. Adams, 1864)
Leiostraca cingenda (A. Adams, 1864)
Asterolamia cingulata A. Warén, 1980
Eulima cingulata E. Réquien, 1848
Vitreolina cionella (T.A. de M. Monterosato,1878)
Niso circinata W.H. Dall, 1889
Provermicularia circumcarinata (FOSSIL) (Stoppani, 1858 †)
Leiostraca circumcincta (A. Adams, 1863)
Subularia circumstriata (M.M. Schepman, 1909)
Eulima clara (A. Adams, 1861)
Eulima clara (FOSSIL) B. Wade, 1926 †
Hemiliostraca clarimaculosa (B.K. Raines, 2003)
Leiostraca clavella (A. Adams, 1861)
Melanella clavula (A. Adams, 1861)