Cerithiopsis catenaria J.C. Melvill & R. Standen,1896
Cerithiopsidella caterinae A. Cecalupo & I. Perugia,2014
Cerithiopsis ceac E. Rolán& R. Fernández-Garcés, 2010
Synthopsis cebuensis A. Cecalupo & I. Perugia,2012
Cerithiopsis cerea P.P. Carpenter, 1857
Joculator cereus A. Cecalupo & I. Perugia,2012
Cerithiopsis cerina A. Adams, 1861
Clathropsis cesairei A. Cecalupo & I. Perugia,2014
Tubercliopsis cessicus (C. Hedley, 1906)
Cerithiopsis cesta P. Bartsch, 1911
Horologica chaillei A. Cecalupo & I. Perugia,2017
Cerithiopsilla charcoti (É. Lamy, 1906)
Clathropsis charlesi A. Cecalupo & I. Perugia,2014
Cerithiopsis charlottensis P. Bartsch, 1917
Clathropsis chatenayi Cecalupo & Perugia, 2017
Seila chenui M. Jay & J. Drivas, 2002
Marshallopsis chirlii A. Cecalupo & I. Perugia,2014
Joculator christiaensi M. Jay & J. Drivas, 2002
Lyroseila cincta (F.W. Hutton, 1885)
Joculator cinctus A. Cecalupo & I. Perugia,2012
Cerithiopsis cinereoflava (O.A.L. Mörch, 1876)
Seila cingulata A. Adams, 1861
Seila cingulifera (K.H.J. Thiele, 1930)
Joculator citrinus A. Cecalupo & I. Perugia,2013
Horologica clara A. Cecalupo & I. Perugia,2012
Dizoniopsis clarkii (E. Forbes & S.C.T. Hanley,1851)
Socienna clava (C.F. Laseron, 1951)
Cerithiopsis clavula A. Adams, 1861
Seila clifdenensis (FOSSIL) (C.R. Laws, 1941 †)
Joculator coffeus A. Cecalupo & I. Perugia,2013
Cerithiopsis columna P.P. Carpenter, 1864
Synthopsis columna C.F. Laseron, 1956
Dizoniopsis concatenata (L.F. Conti, 1864)
Joculator conformis A. Cecalupo & I. Perugia,2013
Tubercliopsis conica A. Cecalupo & I. Perugia,2012