Physa: alternatives and connections

A group of Pulmonifera having the eyes at the base of the tentacles, including the common pond snails.

Having the form of a snail shell; spiral; turbinated.

A snail; also, a snail shell; a hodmandod.

A genus of bivalve shells of which one species (D. polymorpha) is often so abundant as to be very troublesome in the fresh waters of E…

A large division of gastropod molluske, including the Pulmonifera and Opisthobranchiata.

Lately produced, gathered, or prepared for market; not stale; not dried or preserved; not wilted, faded, or tainted; in good condition…

Of, pertaining to, or living in, water not salt; as, fresh-water geological deposits; a fresh-water fish; fresh-water mussels.

One of the classes of Mollusca, of great extent. It includes most of the marine spiral shells, and the land and fresh-water snails. Th…

A genus of marine shells; the ear-shells. See Abalone.

A genus of marine univalve shells; the harp shells; -- so called from the form of the shells, and their ornamental ribs.

Shaped like a snail shell; pertaining to the Helicidae, or Snail family.

Any species or marine hydroids, of the genus Hydractinia and allied genera. These hydroids form, by their rootstalks, a firm, chitinou…

An extensive artificial division of gastropod mollusks, including those that breathe by gills, as contrasted with the Pulmonifera.

A genus of fresh-water air-breathing mollusks, abundant in ponds and streams; -- called also pond snail.

Any species of Siphonaria, a genus of limpet-shaped Pulmonifera, living between tides, on rocks.

A genus of elongated bivalve shells, allied to the mussels, and remarkable for their ability to bore holes for shelter, in solid limes…

A genus of small pectinibranch mollusks, having thick spiral shells, abundant between tides on nearly all rocky seacoasts. They feed o…

A genus of spiral gastropod shells, often of large size, characteristic of the lower Silurian rocks.