Compsodrillia catherina (FOSSIL) W.P. Woodring, 1928 † Jamaica, Saint Thomas
Megasurcula centroamericana (FOSSIL) B.M. Landau, F. Da Silva& S.M. Heitz, 2016 † Venezuela
Naudedrillia cerea R.N. Kilburn, 1988 South Africa, Natal, Durban Bay9,9 mm
Crassispira cerithoidea (P.P. Carpenter, 1857) West Panama16 mm
Viridrillia cervina (P. Bartsch, 1943) South Carolina, Charleston Bump
Crassispira chacei L.G. Hertlein& A.M. Strong, 1951 Sonora, Mexico
Calcatodrillia chamaeleon R.N. Kilburn, 1988 South Africa, Cape20,1 mm
Crassispira chazaliei (P. Dautzenberg, 1900) Panama East51,3 mm
Lioglyphostoma chinenensis (FOSSIL) F.S. MacNeil, 1960 † Okinawa11,4 mm
Knefastia chira (FOSSIL) A.A. Olsson, 1931 † Peru, Chira Valley
Leucosyrinx chloris (FOSSIL) A.A. Olsson, 1922 †
Inquisitor chocolata (E.A. Smith, 1875) China, Zhejiang25 mm
Compsodrillia chowanensis (FOSSIL) Gardner, 1948 † USA, North Carolina, Brunswick
Zonulispira chrysochildosa D.R. Shasky, 1971 Panama19 mm
Comitas chuni (E.C. Von Martens, 1901) Indo-Pacific
Pilsbryspira cinerea (H.C. Weinkauff& W. Kobelt, 1876) Panama East8,3 mm
Monilispira circumcincta G.W. Nowell-Usticke, 1969 Panama East7,7 mm
Leucosyrinx claviforma (S. Kosuge, 1992) Western Australia
Miraclathurella clendenini E.F. Garcia, 2008 Mexico
Leucosyrinx climoi (FOSSIL) P.A. Maxwell, 1988 †
Leucosyrinx clionella W.H. Dall, 1908 Panama Bay
Crassispira coelata (R.B. Hinds, 1843) Panama West18 mm
Pilsbryspira collaris (G.B. I Sowerby, 1834) Costa Rica12,5 mm
Crassispira comasi R. Fernández-Garcés& E. Rolán, 2010 Cuba
Megasurcula condonana (FOSSIL) F.M. Anderson& B. Martin, 1914 † Oregon, Coos bay, Astoria formation32 mm
Crassispira conica (FOSSIL) P.O. Jung, 1965 † Venezuela, Paraguana Peninsula
Crassispira consociata (E.A. Smith, 1877) Angola25 mm
Hindsiclava consors (FOSSIL) (G.B. I Sowerby, 1850 †) Panama, Colón55 mm
Crassispira constricta (FOSSIL) E.W. Vredenburg, 1921 † Myanmar, Magway, Thayetmyo
Crassispira contabulata (FOSSIL) A.E.M. Cossmann, 1889 † France, Paris Basin
Brachytoma convexa (FOSSIL) E.W. Vredenburg, 1921 † Myanmar, Magway, Thayetmyo
Crassispira coracina J.H. McLean& L.H. Poorman, 1971 Costa Rica20 mm
Crassispira cortezi D.R. Shasky& G.B. Campbell, 1964 Panama, Chiriqui Bay19,1 mm
Inquisitor cosibensis (FOSSIL) (M. Yokoyama, 1920 †) Japan, Kanagawa
Inquisitor cotteri (FOSSIL) E.W. Vredenburg, 1921 † Myanmar, Magway, Thayetmyo