Mollusca

The mollusca are animals with soft bodies, enveloped in a muscular skin, and usually protected by a univalve or bivalve shell. […] The univalve mollusca are encephalous, or furnished with a distinct head; they have eyes and tentacula, and the mouth is armed with jaws.

Turning for a very brief space to animals: on the land there are some hermaphrodites, as land-mollusca and earth-worms; but these all pair.

The amphibious animals are provided with special organs for the sense of smell, although a very delicate sense of smell is likewise met with among the crustacea, such as crabs, mollusca and insects.

Probably frogs, crabs, mollusca, and insects form their chief diet; […]

The löss fauna is largely of terrestrial mollusca, as in America, […]

The gentle slopes are favorable to the growth of various mollusca whose hard parts contribute additional material to the growing limestones.

The mollusca, and testaceous animals in particular, have been considered to be of potency in an amatory sense.

On salt marshes, burrowing crabs, mollusca and annelids undoubtedly assist in aeration of the soil. […] One can, for example, make a study of the algae that occur on the shells of some of the larger mollusca or on barnacles.