"Bivalves are those mollusks whose coverings consist of two concave shelly plates or valves united by a hinge."—(Charles Leonard-Stuart, 1911)

Bivalve

"Bivalves are those mollusks whose coverings consist of two concave shelly plates or valves united by…

Shell of a bivalve, those mollusks whose coverings consist of two concave shelly plates or valves.

Bivalve

Shell of a bivalve, those mollusks whose coverings consist of two concave shelly plates or valves.

"Shell of a Bivalve Mollusk, inner surface. ad.a., depression showing the attachment of the anterior adductor muscle; ad.p., posterior adductor muscle; h, hinge with teeth; l, attachments of the ligaments; p, pallial line, marking the attachment of the mantle muscles; s, the pallial sinus, marking the attachment of the retractor muscles of the siphon; u, umbo or beak." — Galloway

Bivalve Mollusk

"Shell of a Bivalve Mollusk, inner surface. ad.a., depression showing the attachment of the anterior…

"Mya arenaria, a burrowing clam. The siphon is represented as fully extended. This is quickly retracted when the animal is disturbed." -Galloway, 1915

Burrowing Clam

"Mya arenaria, a burrowing clam. The siphon is represented as fully extended. This is quickly retracted…

Galatea reclusa is a species of bivalve mollusk in the Donacidae family of bean clams (wedge shells).

Right Valve of Galatea Bivalve

Galatea reclusa is a species of bivalve mollusk in the Donacidae family of bean clams (wedge shells).

"Dorsal View of Gastrochaena. The ventral view shows the dried mantle with pedal perforation." -Whitney, 1911

Dorsal View of Gastrochaena

"Dorsal View of Gastrochaena. The ventral view shows the dried mantle with pedal perforation." -Whitney,…

"Lateral View of Gastrochaena. The ventral view shows the dried mantle with pedal perforation." -Whitney, 1911

Lateral View of Gastrochaena

"Lateral View of Gastrochaena. The ventral view shows the dried mantle with pedal perforation." -Whitney,…

"Ventral View of Gastrochaena. The ventral view shows the dried mantle with pedal perforation." -Whitney, 1911

Ventral View of Gastrochaena

"Ventral View of Gastrochaena. The ventral view shows the dried mantle with pedal perforation." -Whitney,…

"Gnathodon cuneatus. A bivalve mollusk. G. cuneatus is the cuneate clam of Louisiana." -Whitney, 1911

Gnathodon

"Gnathodon cuneatus. A bivalve mollusk. G. cuneatus is the cuneate clam of Louisiana." -Whitney, 1911

pond mussel dissected to show alimentary canal, al c..

Mussel

pond mussel dissected to show alimentary canal, al c..

"Longitudinal Section through a Fresh-water Mussel. a, edge of mantle; b, foot, with position of ganglion indicated; c, gills; d, mouth; e, tentacles or palps; f, posterior adductor muscle; g, anterior adductor; h, head-ganglion; i, ventricle of heart; j, auricle of heart; k, rectum; l, kidney; m, exhalent aperture; n, inhalent aperture." -Vaughan, 1906

Mussel Anatomy

"Longitudinal Section through a Fresh-water Mussel. a, edge of mantle; b, foot, with position of ganglion…

"Mya arenaria, in living position." -Taylor, 1904

Mya arenaria

"Mya arenaria, in living position." -Taylor, 1904

"Mya truncata, in living position." -Taylor, 1904

Mya truncata

"Mya truncata, in living position." -Taylor, 1904

The scallop (Hinnites pusio) is a marine bivalve mollusk from the Pectinidae family.

Scallop

The scallop (Hinnites pusio) is a marine bivalve mollusk from the Pectinidae family.

The Shipworm (Teredo navalis) is a saltwater clam that is known for boring into wooden structures such as ships, piers, and docks.

Shipworm

The Shipworm (Teredo navalis) is a saltwater clam that is known for boring into wooden structures such…