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

Furcated, forked.

Furrow, a trench or hollow.

Fuscated, darkened, obscured.

Fusiform, spindle-shaped, conical, or oval.

G.

Gaping, when the valves do not close.

Geniculate, keeled.

Genus, characters by which they are distinguished from others.

Genera, plural of genus.

Gibbous, bulged.