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

Ochreous, colour of yellow ochre.

Offuscated, darkened, clouded.

Olivaceous, of a greenish olive colour.

Operculum, which closes the aperture of the shell.

Orbicular, circular, round.

Orifice, an opening or perforation.

Ovate, shaped like an egg.

Ovoid, oval.

P.

Papillose, pimple, dotted.