Spirocolpus carsoni (FOSSIL) Finlay & J. Marwick,1937 † New Zealand, Canterbury, Waitaki
Turritella caseyi (FOSSIL) McNeil, 1984 † USA, Mississippi
Protoma cathedralis (FOSSIL) (A. Brongniart, 1856 †) France, Aquitaine121 mm
Tropicolpus cavershamensis (FOSSIL) (G.F. Harris, 1897 †) New Zealand, South Island
Turritella ceibana (FOSSIL) Cooke, 1928 † Mexico, Puebla
Turritella cestasensis (FOSSIL) A.E.M. Cossmann& M.A. Peyrot, 1921 † France, Aquitaine
Turritella chancellorensis (FOSSIL) (Oleksyshyn, 1959 †) USA, Maryland, Saint Mary's48 mm
Zeacolpus chattonensis (FOSSIL) J. Marwick, 1929 † New Zealand, Southland, Gore
Sigmesalia chaussyensis (FOSSIL) (A.E.M. Cossmann, 1888 †) France, Paris Basin
Turritella chicoensis (FOSSIL) W.M. Gabb, 1864 † United States, California, Orange
Incatella chilensis (FOSSIL) (Sowerby, 1846 †) Chile, Los Lagos
Turritella chipolana (FOSSIL) W.H. Dall, 1892 † Florida
Turritella chira (FOSSIL) A.A. Olsson, 1928 † Peru, Piura, Sullana
Turritella chordata H.H. Suter, 1908
Turritella chrysotoxa J.R. le B. Tomlin, 1925 South Africa, Natal, Durban Bay16,1 mm
Turritella cingulata G.B. I Sowerby, 1825 Chile, Arica41 mm
Incatella cingulatiformis (FOSSIL) (Möricke, 1896 †) Chile, Coquimbo
Turritella cingulifer (FOSSIL) Sowerby, 1825 †
Turritella cingulifera G.B. I Sowerby, 1825 Philippines, Olango Island18 mm
Turritella cingulifera filiola (FOSSIL) M. Yokoyama, 1928 † Okinawa13 mm
Turritella circumdata (FOSSIL) G.P. Deshayes, 1861 † France, Paris Basin
Colpospira circumligata (J.C. Verco, 1910) South Australia
Mesalia claibornensis (FOSSIL) † Mexico, Nuevo León, China
Turritella clarionensis L.G. Hertlein& A.M. Strong, 1951 Ecuador82 mm
Mesalia clarki (FOSSIL) R.E. Dickerson, 1914 †
Turritella clathratula (FOSSIL) Wood, 1847 † UK, England, East Riding of Yorkshire
Craginia coalvillensis (FOSSIL) (F.B. Meek †) Texas, Grayson County
Turritella cobbani (FOSSIL) Kirkland, 1996 †
Turritella cochlea L.A. Reeve, 1849 West Sahara46 mm
Mesalia cochleata (FOSSIL) (G.B. Brocchi, 1814 †) Spain, Andalusia19 mm
Cristispira cochleiformis (FOSSIL) (W.M. Gabb, 1869 †) Peru, Ica, Pisco
Turritella cochlias (FOSSIL) J.F. Bayan, 1873 † Denmark
Turritella cochliasthetis (FOSSIL) Orbigny, 1852 † France, Aquitaine
Turritella cocoditana (FOSSIL) F. Hodson, 1926 † Colombia, La Guajira, Uribia
Turritella coemansi (FOSSIL) Briart & Cornet, 1887 † Ukraine