Jagged, denticulated, uneven, toothed like a saw.
Imbricate, placed like the tiles of a house.
Imperforated, not pierced with a hole, wanting an umbilicus.
Inequilateral, when the anterior and posterior sides make different
angles with the hinge.
Inequivalve, where one valve is more convex than the other, or
dissimilar in other respects, as in the common oyster.
Inarticulate, indistinct, not properly formed.
Incumbent, one lying over the other.
Incurved, } bent inward, crooked.
Incurvated, }
Indented, unequally marked, hollowed.
Inflated, tumid, swollen, as if blown out.
Inflected, bent inward.
Indexed, bent towards each other.
Intercostal, placed between the ribs.
Internode, the space between one knot or joint and another.
Interrupted, divided, separated.
Interstice, space between one part and another, a crevice.
Intortion, the turning or twisting in any particular direction.
Involucre, a covering.
Involution, that part which involves or inwraps another.
Involute, where the exterior lip is turned inward at the margin, as in
the Cypræa.
Isabella-colour, a brownish yellow with a shade of brownish red.
Juncture, the joining of the whorl in univalve shells.