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

Subconic, somewhat conical.

Subulate, awl-shaped.

Sulcated, furrowed.

Summit, the tip or apex.

Suture, a hollow line of division in univalves, the spiral line of which separates the wreaths.

T.

Teeth, pointed protuberances within the hinge in bivalves by which the valves are united.

Tentacula, the feelers of snails, which inhabit shells.

Tessellated, chequered like a chess board.

Testacea, that order of animals covered with a testaceous shell. Testaceous, consisting of carbonate of lime and animal matter.