Tentacula, the feelers of snails which inhabit shells.
Tesselated, checkered like a chessboard.
Testacea, the third order of worms, including those which are covered
with a testaceous shell.
Testaceous, consisting of carbonate of lime and animal matter.
Tetragonal, four cornered.
Torose, swelling into knobs or protuberances.
Tortuosity, wreath, flexure.
Tortuous, twisted, wreathed, winding.
Transverse, placed across or crossways. When the breadth of a shell is
greater than its length, it is called transverse.
Trapeziform, shaped like a trapezium.
Trigonal, having three angles.
Truncated, stunted, cut short or abruptly off at the end.
Tubercle, a little knot or pimple.
Tuberculated, knotted, pimpled.
Tuberosities, prominent knots or excrescences.
Tubular, in the shape of a hollow tube.
Tubulate, tubulous or hollow.
Tunicated, coated.
Turbinated, shaped like a top or pear.
Turgid, swollen.