The Conchologist's First Book / A System of Testaceous Malacology, Arranged Expressly for the Use of Schools, in Which the Animals, According to Cuvier, Are Given With the Shells, a Great Number of New Species Added, and the Whole Brought Up, as Accurately as Possible, to the Present Condition of the Science.

by Edgar Allan Poe; Thomas Brown

Tortuosity, flexure.

Tortuous, twisted.

Transverse, crossways.

Trapeziform, shaped like a trapezium.

Trigonal, having three angles.

Truncated, cut short, ending abruptly.

Tubercle, knot or pimple.

Tuberculated, knotted, pimpled.

Tubular, in the shape of a hollow tube.

Tunicated, coated.