This ClipArt gallery includes 49 illustrations of miscellaneous mollusks. Mollusks are animals that usually have shells, although some no longer have the shell, which is mostly seen in the ones with marine movement.

Two ancient mollusks from the Carboniferous Age, the Productus Nebrascensis and the Athyris subtilita.

Ancient Mollusks

Two ancient mollusks from the Carboniferous Age, the Productus Nebrascensis and the Athyris subtilita.

auditory organ of a mollusk. a, auditory nerve; b, outer wall of connective tissue; c, cells with auditory hairs; d, otoliths

Auditory Organ

auditory organ of a mollusk. a, auditory nerve; b, outer wall of connective tissue; c, cells with auditory…

Auditory and equilibrative organs of mollusks.

Auditory Organs of Mollusks

Auditory and equilibrative organs of mollusks.

Diagram to show the mode in which successively formed chambers may completely embrace their predecessors, as in Frondicularia.

Successively Formed Chambers

Diagram to show the mode in which successively formed chambers may completely embrace their predecessors,…

"The <em>Chiton Chilensis</em> has a smooth border; it is found in crevices of rocks under stones, near Valparaiso." &mdash; Goodrich, 1859

Chiton chilensis

"The Chiton Chilensis has a smooth border; it is found in crevices of rocks under stones, near…

Chiton is a peculiar marine mollusk. It is low and flat, creeping like the limpets. But the shell consists of a series of eight pieces overlapping one another from the anterior to the posterior end.

Chiton

Chiton is a peculiar marine mollusk. It is low and flat, creeping like the limpets. But the shell consists…

A dorsal view of a chiton, showing the eight shell plates. Chitons are small to large, primitive marine mollusks in the class Polyplacophora. There are 900 to 1,000 extant species of chitons in the class, which was formerly known as Amphineura. Chitons have a shell which is composed of eight separate shell plates or valves. These plates overlap somewhat at the front and back edges, and yet the plates articulate well with one another. Because of this, although the plates provide good protection for impacts from above, they nonetheless permit the chiton to flex upward when needed for locomotion over uneven surfaces, and also the animal can slowly curl up into a ball when it is dislodged from the underlying surface. The shell plates are surrounded by a structure known as a girdle.

Chiton (Dorsal)

A dorsal view of a chiton, showing the eight shell plates. Chitons are small to large, primitive marine…

A ventral view of a chiton, showing p, foot; o, mouth; kr, oval fringe; and br, the numerous ctenidia. Chitons are small to large, primitive marine mollusks in the class Polyplacophora. There are 900 to 1,000 extant species of chitons in the class, which was formerly known as Amphineura. Chitons have a shell which is composed of eight separate shell plates or valves. These plates overlap somewhat at the front and back edges, and yet the plates articulate well with one another. Because of this, although the plates provide good protection for impacts from above, they nonetheless permit the chiton to flex upward when needed for locomotion over uneven surfaces, and also the animal can slowly curl up into a ball when it is dislodged from the underlying surface. The shell plates are surrounded by a structure known as a girdle.

Chiton (Ventral)

A ventral view of a chiton, showing p, foot; o, mouth; kr, oval fringe; and br, the numerous ctenidia.…

An illustration of a chiton's excretory and reproductive organs. O, Ovary; P, Pericardium; N, Nephridium; r, rectum; and Br, Ctenidia.

Chiton Excretory and Reproductive Organs

An illustration of a chiton's excretory and reproductive organs. O, Ovary; P, Pericardium; N, Nephridium;…

An illustration of a chiton's excretory and reproductive organs. O, Ovary; P, Pericardium; N, Nephridium; r, rectum; Cl, Cloacal or pallial chamber of Neomaniae and Chaetoerma; and Br, Ctenidia.

Chiton Excretory and Reproductive Organs

An illustration of a chiton's excretory and reproductive organs. O, Ovary; P, Pericardium; N, Nephridium;…

An illustration of a chiton's excretory and reproductive organs. O, Ovary; P, Pericardium; N, Nephridium; r, rectum; and Cl, Cloacal or pallial chamber of Neomaniae and Chaetoerma.

Chiton Excretory and Reproductive Organs

An illustration of a chiton's excretory and reproductive organs. O, Ovary; P, Pericardium; N, Nephridium;…

An illustration of a chiton's excretory and reproductive organs. O, Ovary; P, Pericardium; N, Nephridium; r, rectum; and Cl, Cloacal or pallial chamber of Neomaniae and Chaetoerma; Br, Ctenidia; g, External aperture of the gential duct of Chiton; and u, External aperture of nephridium.

Chiton Excretory and Reproductive Organs

An illustration of a chiton's excretory and reproductive organs. O, Ovary; P, Pericardium; N, Nephridium;…

An illustration of the dorsal view of a chiton with the shell removed. Showing b, buccal mass; ov, ovary; od, oviduct; i, coils of intestine; ao, aorta; c' keft testine; and c, ventricle.

Chiton with Shell Removed

An illustration of the dorsal view of a chiton with the shell removed. Showing b, buccal mass; ov, ovary;…

They differ from all other mollusks in having a bilaterally symmetrical covered with a number of seperate overlapping plates or valves, thus exhibiting the nearest approach to the vermiform or articulated type of structure.

Chitonidæ

They differ from all other mollusks in having a bilaterally symmetrical covered with a number of seperate…

"Dentalium: B, the shell of Dentalium Entalis, broken longitudinally, showing the animal in a contracted state. C, the shell, showing the animal advancing out; a and b, the foot, the lobes of which are developed in the form of a corolla; c, a part of the collar of the mantle. E, the animal, magnified, extricated from the shell, with them antle slit along the dorsal and medial line, detached in part from its posterior insertion, and turned aside so as to show the parts enclosed; a, the extremity of the foot, which closes the aperture j, of the collar lm, of the mantle nop; bb, lobes of the fot; c, the foot itself, presenting a depression or a channel, running its whole length; d, the head; e, the cerebral ganglion; f, f, the two sides of the mouth; g, g, the membranes which support the branchiae; gg, ii, the branchiae; pp, qq, the retractor muscles; s, the muscle of insertion; t, the expanded posterior extremity, in which is situated the vent." &mdash; Chambers' Encyclopedia, 1875

Dentalium

"Dentalium: B, the shell of Dentalium Entalis, broken longitudinally, showing the animal in a contracted…

An illustration of a pallial eye and aesthetes of a chiton.

Pallial Eye

An illustration of a pallial eye and aesthetes of a chiton.

Fu'sus is a genus of gastropods, which are allied to the British whelk and American conch, and which include, in F. colosseus, perhaps the largest living gastropod. The shell is fusiform, with a many-whorled spire and a long, straight canal. One species, F. antiguus, is dredged in the seas about Great Britain to be sold in the London markets as food.

Fu'sus

Fu'sus is a genus of gastropods, which are allied to the British whelk and American conch, and which…

The name of a genus of gasteropodous mollusca. These animals are slug-like in appearance, and derive their popular name from the prominent character of the front pair of tentacles, which somewhat resemble the ears of a hare

Sea Hare

The name of a genus of gasteropodous mollusca. These animals are slug-like in appearance, and derive…

Hearing is the perception of certain vibrations of bodies. These vibrations give rise to sound waves. These sound waves come to animals through the air, through water, or throught both air and water. Here we see the auditory organ of a mollusk showing the (a) auditory nerve, (b) the outer wall of connective tissue, (c) cells with auditory hairs, and (d) otolith.

Sense of Hearing

Hearing is the perception of certain vibrations of bodies. These vibrations give rise to sound waves.…

A Jason mollusk from the Reptilian age of the Mesozoic time.

Jason Mollusk

A Jason mollusk from the Reptilian age of the Mesozoic time.

"The Lamp-Shell, <em>Terebratula maxillata, has a smooth convex shell, the animal attached by a peduncle." &mdash; Goodrich, 1859

Lamp-shell

"The Lamp-Shell, Terebratula maxillata, has a smooth convex shell, the animal attached by a peduncle."

A mollusk radiate from the Paleozoic time, Leptaena sericea.

Leptaena Mollusk

A mollusk radiate from the Paleozoic time, Leptaena sericea.

Mactra stultorum, previously sometimes known as Mactra corallina is a species of edible saltwater clam, a marine bivalve mollusk in the family Mactridae, the trough shells.

Right Valve of a Mactra Stultorum

Mactra stultorum, previously sometimes known as Mactra corallina is a species of edible saltwater clam,…

"Ideal mollusc. m., Mouth; g.c., cerebral ganglia; c., edges of mantle skirt; z.g., duct of right lobe of digestive gland; s., pericardial cavity; f., edges of shell-sac; v., ventricle of heart; u., nephridium; an., anus; n., posterior part of the foot; l., opening of nephridium; k., genital aperture; g.ab., abdominal ganglion on visceral loop; g.v., visceral ganglion; z.l., left lobe of digestive gland; p., foot; g.pe., pedal ganglion; g.pl. pleural ganglion." -Thomson, 1916

Mollusc Parts

"Ideal mollusc. m., Mouth; g.c., cerebral ganglia; c., edges of mantle skirt; z.g., duct of right lobe…

"[From left to right:] Cockles, Imperial Volute, Clown Volute, Pholas, Helmet Shell" &mdash; Goodrich, 1859

Mollusca

"[From left to right:] Cockles, Imperial Volute, Clown Volute, Pholas, Helmet Shell" — Goodrich,…

"[From left to right:] Snail-shell and Egg, Ostrea and Spondylus, Carinaria, Vitreous Carinaria." &mdash; Goodrich, 1859

Mollusca

"[From left to right:] Snail-shell and Egg, Ostrea and Spondylus, Carinaria, Vitreous Carinaria." —…

"[From left to right:] Fusus Longissimus, Pearl Oyster and Coral, Volute, Thorny Woodcock." &mdash; Goodrich, 1859

Mollusca

"[From left to right:] Fusus Longissimus, Pearl Oyster and Coral, Volute, Thorny Woodcock." —…

A diagram of a mollusca. Mollusca are soft-bodied animals that are usually protected by an external skeleton or shell composed of carbonate of lime. Labels: 1, Alimentary canal. 2, Heart. 3, Cerebral ganglion. 4, Pedal ganglion. 5, Ganglion of digestive organs and muscles.

Diagram of a Mollusca

A diagram of a mollusca. Mollusca are soft-bodied animals that are usually protected by an external…

In the Mollusca are found the ganglions and connective arrangement, with both sensitive and motor nerves, and on a plan corresponding to the body. Labels: 1, Esophagal ganglions. 2, Cerebral ganglions. , Pedal of locomotive ganglions. 4, Respiratory ganglions.

Diagram of a Type of Mollusca

In the Mollusca are found the ganglions and connective arrangement, with both sensitive and motor nerves,…

An ancient mollusk from the Paleozoic time, Goniatites Marcellensis from the Hamilton group.

Goniatites Mollusk

An ancient mollusk from the Paleozoic time, Goniatites Marcellensis from the Hamilton group.

Bivalves are molluscs belonging to the class Bivalvia. They have two-part shells, and typically both valves are symmetrical along the hinge line. The class has 30,000 species, including scallops, clams, oysters and mussels. Other names for the class include Bivalva, Pelecypoda, and Lamellibranchia.

Right Valve of Mollusk

Bivalves are molluscs belonging to the class Bivalvia. They have two-part shells, and typically both…

An illustration of the right valve of a mollusk. Bivalves are molluscs belonging to the class Bivalvia. They have two-part shells, and typically both valves are symmetrical along the hinge line. The class has 30,000 species, including scallops, clams, oysters and mussels. Other names for the class include Bivalva, Pelecypoda, and Lamellibranchia.

Right Valve of Mollusks

An illustration of the right valve of a mollusk. Bivalves are molluscs belonging to the class Bivalvia.…

"[From left to right:] Shell from Malabar, Large Mussel, Thorned Murex, Large Helmet Shell." &mdash; Goodrich, 1859

Murcidae

"[From left to right:] Shell from Malabar, Large Mussel, Thorned Murex, Large Helmet Shell." —…

A mollusk radiate from the Paleozoic time, Orthis testudinaria.

Orthis Mollusk

A mollusk radiate from the Paleozoic time, Orthis testudinaria.

A mollusk radiate from the Paleozoic time, Orthis occidentalis.

Orthis Mollusk

A mollusk radiate from the Paleozoic time, Orthis occidentalis.

A mollusk radiate from the Paleozoic time, Orthis varica of the Niagara group.

Orthis Mollusk

A mollusk radiate from the Paleozoic time, Orthis varica of the Niagara group.

"Otocyst in a mollusk. n, nerve; ;o, otolith; s.c., sensory cells in wall of otocyst." &mdash; Galloway

Otocyst

"Otocyst in a mollusk. n, nerve; ;o, otolith; s.c., sensory cells in wall of otocyst." — Galloway

Modern Foraminiferal types - Polystomella

Polystomella

Modern Foraminiferal types - Polystomella

A mollusk radiate from the Paleozoic time, Pterinea emacerata from the Niagara group.

Pterinea Mollusk

A mollusk radiate from the Paleozoic time, Pterinea emacerata from the Niagara group.

A mollusk radiate from the Paleozoic time, Raphistoma lenticularis.

Raphistoma Mollusk

A mollusk radiate from the Paleozoic time, Raphistoma lenticularis.

An illustrative view of the dissection of he renal organs of a chiton. "F, foot; L, Edge of the mantle not removed in the front part of the specimen; s.o., Oesophagus; af, anus; gg, Genital duct; go, External opening of the same; eg, Stem of the nephridium leading to no, its external aperture; nk, reflected portion of the nephridial stem; ng, Fine caeca of the nephridium, which are seen ramifying transversely over the whole inner surface of the pedal muscular mass." -Britannica, 1910

Dissection of the Renal Organs of a Chiton

An illustrative view of the dissection of he renal organs of a chiton. "F, foot; L, Edge of the mantle…

A mollusk radiate from the Paleozoic time, Rhynchotreta cuneata from the United States and Great Britain.

Rhynchotreta Mollusk

A mollusk radiate from the Paleozoic time, Rhynchotreta cuneata from the United States and Great Britain.

Modern Foraminiferal types - Rotalia

Rotalia

Modern Foraminiferal types - Rotalia

"The <em>Chiton spinosus</em> is bordered by long, black, aculeted spines; found in the South Seas; length three inches." &mdash; Goodrich, 1859

Chiton spinosus

"The Chiton spinosus is bordered by long, black, aculeted spines; found in the South Seas;…

An ancient mollusk from the Paleozoic time, Spirifer mucronatus.

Sprifer Mollusk

An ancient mollusk from the Paleozoic time, Spirifer mucronatus.

An ancient mollusk from the Carboniferous Age, the Spirifer cameratus.

Spirifer Mollusk

An ancient mollusk from the Carboniferous Age, the Spirifer cameratus.

A mollusk radiate from the Paleozoic time, Strophomena rhomboidalis

Strophomena Mollusk

A mollusk radiate from the Paleozoic time, Strophomena rhomboidalis

A variety of invertebrates from the Tertiary age.

Tertiary Invertebrates

A variety of invertebrates from the Tertiary age.

"It has an aperture at each end; the animal inhabiting it is of a cylindrical form, and inclosed in a sac-like mantle." &mdash; Goodrich, 1859

Elephant's tooth

"It has an aperture at each end; the animal inhabiting it is of a cylindrical form, and inclosed in…