Nassarius concinnus (W.L. Powys, 1835) Philippines, Aliguay Island28 mm
Demoulia conglobata (FOSSIL) (G.B. Brocchi, 1814 †) Italy, Emilia35 mm
Nassarius congruus (FOSSIL) (M. Yokoyama, 1926 †) Japan, Shizuoka
Nassarius conoidalis (G.P. Deshayes, 1832) Australia, Dingo Beach26 mm
Nassarius consensus E. Ravenel, 1861 Brazil, Guarapari8,3 mm
Tritia consociata (FOSSIL) (Wood, 1848 †) Belgium19 mm
Tritia conspersa (R.A. Philippi, 1849) Canary Islands13 mm
Nassarius coppingeri (E.A. Smith, 1881) Argentina, Tierra del Fuego9 mm
Nassarius coralligenus (P.M. Pallary, 1900) Spain7 mm
Ilyanassa corbis (FOSSIL) A.A. Olsson, 1967 † USA, Florida, Collier
Nassarius coriolis H.H. Kool, 2009 Philippines, Cebu29,4 mm
Nassaria cornelliana (FOSSIL) A.A. Olsson, 1914 †
Nassarius cornellianus (FOSSIL) A.A. Olsson, 1916 † Florida, Leon County
Tritia corniculum (A.G. Olivi, 1792) Croatia, Istria14,8 mm
Tritia corniculum fasciolatus Y. Hirase, 1936 Canary Islands, Lanzarote15 mm
Tritia corniculum flava (F.P. Marrat, 1877) Slovenia15 mm
Nassaria corollaria K. Fraussen, 2006 Indonesia, Tanimbar Islands26,6 mm
Nassaria coromandelica E.A. Smith, 1894 Somalia48 mm
Nassarius coronatus (J.G. Bruguière, 1789) Philippines, Calituban Island31,2 mm
Nassarius coronulus (A. Adams, 1852) Madagascar, Tulear12 mm
Nassarius corrugatus (FOSSIL) (G.B. Brocchi, 1814 †) France, Normandy9,9 mm
Hebra corticata (A. Adams, 1852) Philippines, Sulu Sea15,3 mm
Hebra corticata lirata (F.P. Marrat, 1874) Philippines, Sulu Sea13,5 mm
Pallacera costata (FOSSIL) (W.M. Gabb, 1873 †) Florida18 mm
Nassarius crassigranosus (FOSSIL) (R. Tate, 1888 †)
Nassaria crassiuscula (FOSSIL) (L.M.D. Bellardi, 1882 †) Spain, Malaga9 mm
Phos crassus R.B. Hinds, 1843 Panama39 mm
Phos crassus clarki (M. Smith, 1944) Peru49 mm
Nassarius crebresulcatus (FOSSIL) (L.M.D. Bellardi, 1882 †) France, Bretagne11,5 mm
Nassarius crebricostatus (M.M. Schepman, 1911) La Reunion Island13 mm
Nassarius crebricostulatus (FOSSIL) (L.M.D. Bellardi, 1882 †) Hungary, Borsodbóta9 mm
Nassarius crematus R.B. Hinds, 1844 Japan, Kochi31 mm
Nassarius crenoliratus (A. Adams, 1852) Philippines, Palawan Island11 mm
Nassarius crenulatus (J.G. Bruguière, 1792) Taiwan32 mm
Reticunassa crenulicostata (T. Shuto, 1969) Philippines, Olango Island6 mm