Favartia cocosensis B.W. Myers & D'Attilio,1990
Xymene coctor (FOSSIL) J. Marwick, 1948 †
Hadriania coelata (FOSSIL) (F. Dujardin, 1837 †)
Murexsul coffeebayensis M. Lussi, 2010
Hexaplex colei (FOSSIL) K.V.W. Palmer, 1937 †
Siratus colellai (R. Houart, 1999)
Flexopteron collata (FOSSIL) (R.J.L. Guppy, 1873 †)
Favartia collega (FOSSIL) (Boettger, 1906 †)
Dermomurex colombi R. Houart, 2006
Favartia colombi R. Houart & S. Gori, 2011
Ocenebra colorata (FOSSIL) Degrange-Touzin, 1894 †
Siratus coltrorum (E.H. Vokes, 1990)
Favartia coltrorum R. Houart, 2005
Enixotrophon columbarioides (G. Pastorino& F. Scarabino, 2008)
Nassa columbelloides (FOSSIL) B. de Basterot, 1825 †
Plicopurpura columellaris (J.B.P.A. Lamarck, 1816)
Benthoxystus columnarius (C. Hedley & W.L. May,1908)
Habromorula combauti (FOSSIL) Goret & Pons, 2013 †
Xymenella comes (FOSSIL) (P.A. Maxwell, 1992 †)
Carhuaspina comotrana (FOSSIL) DeVries, 2005 †
Naquetia compactus (FOSSIL) (W.M. Gabb, 1873 †)
Murex complytropis (FOSSIL) Author unknown †
Hexaplex conatus (D.F. McMichael, 1964)
Timbellus concavopterus (S. Kosuge, 1980)
Enixotrophon concepcionensis (R. Houart & J. Sellanes,2006)
Ocinebrina concerpta (FOSSIL) (L.M.D. Bellardi, 1873 †)
Concholepas concholepas (J.G. Bruguière, 1789)
Enixotrophon condei (R. Houart, 2003)
Pradoxa confirmata (F. Fernandes & E. Rolán,1990)
Coralliophila confusa S. Kosuge, 1986
Favartia confusa (J.W. Brazier, 1877)
Favartia conleyi R. Houart, 1999
Ecphora conoyensis (FOSSIL) E.J. Petuch, 2004 †
Pterorytis conradi (FOSSIL) W.H. Dall, 1890 †
Morula consanguinea (E.A. Smith, 1890)