Tellina crassiplicata W.H. Dall, P. Bartsch& H.A. Rehder, 1938
Macoma crassula (G.P. Deshayes, 1855)
Arcopagia craticula (FOSSIL) Sowerby, 1850 †
Macomopsis crawfordi (G.B. III Sowerby, 1892)
Macomopsis crawfordi ordinaria (G.B. III Sowerby, 1904)
Semelangulus crebrimaculatus (G.B. II Sowerby, 1868)
Tellina cristallina (L. Spengler, 1798)
Tellidora cristata (C.A. Récluz, 1842)
Tellidora cristata (FOSSIL) (Recluz) †
Tellina crosnieri R. von Cosel, 1995
Tellina crucigera (J.B.P.A. Lamarck, 1818)
Moerella ctenota (FOSSIL) Gardner, 1947 †
Arcopagia cuisensis (FOSSIL) Orbigny, 1850 †
Jitlada culter (S.C.T. Hanley, 1844)
Tellina cumingii (S.C.T. Hanley, 1844)
Macoma cuneipyga (O.A. Scarlato, 1981)
Tellina cupressensis (FOSSIL) H.D. Russell & Landes,1937 †
Tellina cuspis S.C.T. Hanley, 1844
Tellina cycladiformis S.C.T. Hanley, 1844
Tellina cygnus S.C.T. Hanley, 1844
Strigilla cyrenoidea (S.C.T. Hanley, 1844)
Tellina dariena (FOSSIL) T.A. Conrad, 1855 †
Tellina decisa (FOSSIL) (J. Marwick, 1931 †)
Moerella declivis (FOSSIL) (T.A. Conrad, 1834 †)
Tellina decumbens (P.P. Carpenter, 1865)
Linearis delicatula (FOSSIL) Warren, 1933 †
Cadella delta (M. Yokoyama, 1922)
Tellina deltoidalis J.B.P.A. Lamarck, 1818
Psammacoma democraciana (FOSSIL) F. Hodson, 1931 †
Angulus democracianus (FOSSIL) F. Hodson, 1931 †
Tellina densestriata R. von Cosel, 1995
Arcopagia denudata (FOSSIL) G.P. Deshayes, 1857 †
Tellina deshayesii S.C.T. Hanley, 1844
Pseudarcopagia detrita (FOSSIL) (Woods 1931) †
Macoma dexioptera R. Baxter, 1977