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

Intercostal, placed between the ribs.

Interrupted, divided, separated.

Interstice, space between.

Intortion, turning or twisting.

Involute, without a spire.

Involution, that part which involves another.

Juncture, the joining of the whorl in univalves.

K.

Keel, the longitudinal prominence in the Argonauta.

Keeled, see Carinated.