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"Having a sinuous pallial margin and consequent sinuous impression on the shell along the line of attachment of the mantle. Into the sinus thus formed the siphons, which are always developed in these bivalves, can more or less be withdrawn." —Whitney, 1889

Iphigenia Brasiliensis - Sinupalliate Right Valve

"Having a sinuous pallial margin and consequent sinuous impression on the shell along the line of attachment…

"The <em>Panopaea Australis</em> is a large analogous species, found at Port Natal, on the coast of Africa. It buries itself several feet deep i nthe sand. In general form it resembles the long clam, but its siphon projects farther from the shell." &mdash; Goodrich, 1859

Panopaea australis

"The Panopaea Australis is a large analogous species, found at Port Natal, on the coast of…

The Goose Barnacle has a body resembling a clam, attached by a soft, flexible stalk to some solid object.

Barnacle

The Goose Barnacle has a body resembling a clam, attached by a soft, flexible stalk to some solid object.

"An animal of one of the lower orders. It fastens itself to some floating object and becomes glued to it by a secretion of cement, and develops a valved shell."

Barnacle

"An animal of one of the lower orders. It fastens itself to some floating object and becomes glued to…

this is the common round clam of the Atlantic coast found from Texas to Cape Cod. It is frequently seen in eastern markets and much esteemed as food, (Beach, 1909).

Clam

this is the common round clam of the Atlantic coast found from Texas to Cape Cod. It is frequently seen…

Anatomy of a bivalve clam. (ss) respiratory tubes; (aa) muscles by which the shell is closed (b) gills; (h) heart; (o) mouth; (f) foot; (m) cut edge of mantle.

Clam

Anatomy of a bivalve clam. (ss) respiratory tubes; (aa) muscles by which the shell is closed (b) gills;…

<em>Venus mercenaria</em>, the common quahaug or salt-water clam, about three fourths natural size.

Clam

Venus mercenaria, the common quahaug or salt-water clam, about three fourths natural size.

<em>Unio radiatus</em>, a common species of freshwater clam, of New England ponds and streams.

Clam

Unio radiatus, a common species of freshwater clam, of New England ponds and streams.

A common cockle shell.

Cockle

A common cockle shell.

"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

"The Giant Clam, <em>Tridacna gigas</em>, is the largest of known shell-fish, the two valves sometimes weighing five hundred pounds, and the animal from twenty to thirty pounds. It is found along the shores of the Polynesian and Asiatic Islands, where the flesh is eaten raw by the natives." &mdash; Goodrich, 1859

Shells of the great clam

"The Giant Clam, Tridacna gigas, is the largest of known shell-fish, the two valves sometimes…

A clam with hydriods growing upon its shell.

Hydriods

A clam with hydriods growing upon its shell.

A limpet having the shell pileate in form, with rounded apeture, posterior spirally recurved apex, and horseshoe-shpaed muscular impressions.

Foolscap Limpet

A limpet having the shell pileate in form, with rounded apeture, posterior spirally recurved apex, and…

A young lobster cracked his tooth on a clam, learning a hard lesson.

Lobster Lesson

A young lobster cracked his tooth on a clam, learning a hard lesson.

"The shells of the <em>Hippopus maculatus</em> are smaller but are more beatiful, and are used in the manufacture of various ornamental articles, such as inkstands, &c." &mdash; Goodrich, 1859

Hippopus maculatus

"The shells of the Hippopus maculatus are smaller but are more beatiful, and are used in the…

Half an Oyster Shell.

Oyster

Half an Oyster Shell.

"River-Mussel (Anodonta fragilis), North Carolina."-Whitney, 1902

River Mussel

"River-Mussel (Anodonta fragilis), North Carolina."-Whitney, 1902

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.

Limpets are attractive little gasteropods which are left uncovered when the tide is low.

Limpet, Shell

Limpets are attractive little gasteropods which are left uncovered when the tide is low.

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…