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.