Manaria thurstoni E.A. Smith, 1906 Bay of Bengal
Latisipho timetus (W.H. Dall, 1919) Aleutian Islands, Unalaska Island
Gemophos tinctus (T.A. Conrad, 1846) Venezuela27 mm
Siphonalia tjibaliungensis (FOSSIL) (K. Martin, 1895 †) Indonesia, Java
Clivipollia tokiae M. Chino & K. Fraussen,2015 Samoa6,9 mm
Cominella tolagaensis (W.F. Ponder, 1968) New Zealand24,6 mm
Prosipho tomlini A.W.B. Powell, 1957 New Zealand
Manaria tongaensis Fraussen & Stahlschmidt,2016
Plicifusus torquatus (A. Petrov, 1982)
Godfreyena torri (J.C. Verco, 1909) Australia, Esperance48 mm
Hesperisternia tortugera (FOSSIL) (A.A. Olsson, 1922 †) Costa Rica
Colus tortuosus (FOSSIL) Harmer, 1914 † UK, England, Suffolk
Gaillea tosaensis (T.A. Okutani& A. Iwahori, 1992) Vietnam10,2 mm
Prodotia townsendi (J.C. Melvill, 1918)
Retimohnia toyamana (R. Tiba, 1981) Japan, Toyama Bay
Cantharus tranquebaricus (J.F. Gmelin, 1791) Thailand, Phuket Island46 mm
Solenosteira transitoria (FOSSIL) E.J. Petuch, 1994 † Florida, Sarasota County13,5 mm
Pisania transsylvanica (FOSSIL) R. Hoernes& M. Auinger, 1884 †
Buccinum trescostatum R. Tiba, 1980 Kurile islands70 mm
Falsitromina tricarinata (A.W.B. Powell, 1951) Norway
Buccinum tricarinatum W.H. Dall, 1877 Aleutian Islands80 mm
Pollia tridentata (M. Tuomey& F.S. Holmes, 1858 ) Florida, Sarasota County27 mm
Engina trifasciata (L.A. Reeve, 1846) Eritrea16 mm
Siphonalia trilica (FOSSIL) Rivera, 1957 †
Siphonalia triton (R.P. Lesson, 1841)
Pisania tritonoides (L.A. Reeve, 1846) Philippines, Olango Island24 mm
Bathyancistrolepis trochoideus (W.H. Dall, 1907) Japan, Wakayama11,1 mm
Siphonalia trochulus (L.A. Reeve, 1843) Japan, Wakayama40 mm
Siphonalia trochulus tokaiensis T. Kira, 1959 Japan, Mikawa bay60 mm
Limatofusus trombinus (W.H. Dall, 1919) Bering Sea, Pribiloff Islands
Aulacofusus trophius (W.H. Dall, 1919) Washington
Volutopsius trophonius W.H. Dall, 1902 Bering Sea100 mm
Truncaria truncata (FOSSIL) (G.P. Deshayes, 1835 †) France, Paris Basin
Caducifer truncatus (R.B. Hinds, 1844) New Caledonia17,6 mm
Buccinum tsubai J.T. Kuroda & T. Kikuchi,1933 Japan, Hyogo59,2 mm