Frogs and snails

Pictorial divider

Frogs and snails

Hermit crab in shell of sea snail.

Hermit Crab

Hermit crab in shell of sea snail.

Parts of a snail shell.

Snail Shell

Parts of a snail shell.

A kind of snail shell; the left-hand shell.

Snail Shell

A kind of snail shell; the left-hand shell.

A kind of snail shell; the flat spiral or discoid shell.

Snail Shell

A kind of snail shell; the flat spiral or discoid shell.

A kind of snail shell; the right -hand shell.

Snail Shell

A kind of snail shell; the right -hand shell.

In this species of pond snail, the aperture of the shell is not closed by an operculum.

Pond Snail

In this species of pond snail, the aperture of the shell is not closed by an operculum.

In this species of pond snail, the aperture of the shell is closed by an operculum.

Pond Snail

In this species of pond snail, the aperture of the shell is closed by an operculum.

In this species of pond snail, the aperture of the shell is closed by an operculum.

Pond Snail

In this species of pond snail, the aperture of the shell is closed by an operculum.

A pond snail creeping. The largest part extending from the shell is the foot.

Pond Snail

A pond snail creeping. The largest part extending from the shell is the foot.

A pond snail creeping. The largest part extending from the shell is the foot. The proboscis is in the center.

Pond Snail

A pond snail creeping. The largest part extending from the shell is the foot. The proboscis is in the…

Variations in a common pond snail.

Pond Snail

Variations in a common pond snail.

Variations in a common pond snail.

Pond Snail

Variations in a common pond snail.

Variations in a common pond snail.

Pond Snail

Variations in a common pond snail.

Variations in a common pond snail.

Pond Snail

Variations in a common pond snail.

Variations in a common pond snail.

Pond Snail

Variations in a common pond snail.

Variations in a common pond snail.

Pond Snail

Variations in a common pond snail.

A large sea snail (Natica); it feeds on clams, etc., boring through their shells.

Sea Snail

A large sea snail (Natica); it feeds on clams, etc., boring through their shells.

A large sea snail (Natica) crawling; showing the very large foot surrounding the shell.

Sea Snail

A large sea snail (Natica) crawling; showing the very large foot surrounding the shell.

Ampullaria, one of the Apple Shells. (o) operculum; (s) respiratory tube.

Apple Shells

Ampullaria, one of the Apple Shells. (o) operculum; (s) respiratory tube.

Slugs are terrestrial gastropods.

Slug

Slugs are terrestrial gastropods.

o - operculum; s - siphon

Whelk

o - operculum; s - siphon

A sea shell.

Natica

A sea shell.

An edible snail. Snails are often seaten as food in many parts of Europe.

Edible Snail

An edible snail. Snails are often seaten as food in many parts of Europe.

Four and twenty tailors went to kill a snail. The best man amongst them durst not touch her tail. She put out her horns, like a Kyloe cow, Run, tailors, run, or she'll kill you all just now.

Four and Twenty Tailors

Four and twenty tailors went to kill a snail. The best man amongst them durst not touch her tail. She…

"Four inches long; found in the European seas." — Goodrich, 1859

Sea-snail

"Four inches long; found in the European seas." — Goodrich, 1859

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

Mollusca

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

"This is furnished with four tentacula, two of which are smaller than the others; at the end of these, which the animal pushes out or draws back like telescopes, are blackish knobs, which are the eyes." — Goodrich, 1859

Common snail

"This is furnished with four tentacula, two of which are smaller than the others; at the end of these,…

"The polished nerita, <em>Nerita polita</em>, is distributed through nearly all tropical seas." &mdash; Goodrich, 1859

Polished nerita

"The polished nerita, Nerita polita, is distributed through nearly all tropical seas." —…

"A genus of land-snails, of the family Helicid&aelig;. Typified by the large agate-shells of Africa."-Whitney, 1902

Agate Shell

"A genus of land-snails, of the family Helicidæ. Typified by the large agate-shells of Africa."-Whitney,…

"The species are numerous, and are chiefly found in the fresh waters of tropical and subtropical countries, many of them being known as apple-shells and idol-shells."-Whitney, 1902

Apple Shell

"The species are numerous, and are chiefly found in the fresh waters of tropical and subtropical countries,…

"Snail is the common name of gasteropodous mollusks. They feed chiefly on vegetable substances, though they are very indiscriminate in their appetite and even devour the dead of their own kind. The mischief which they do to garden crops is well known. Snails delight in warm, moist weather; in dry weather, their chief time of activity is during the night, and they hide themselves by day; but after rain they come forth at any hour in quest of food. At the approach of winter or in very dry weather they close the mouth of the shell with a membrane (epiphragm), formed by the drying of the mucous substance which they secrete, and become inactive and torpid."&mdash;(Charles Leonard-Stuart, 1911)

Snail

"Snail is the common name of gasteropodous mollusks. They feed chiefly on vegetable substances, though…

Scene from the story, "Snail."

Child and Snail

Scene from the story, "Snail."

A type of shell.

Clymenia

A type of shell.

A family of irregular sea urchins, flattened into a discoidal or shield like shape, with a mouth central and furnished with a masticatory apparatus.

Clypeastrid

A family of irregular sea urchins, flattened into a discoidal or shield like shape, with a mouth central…

"Soft unsegmented bodies, bilaterally symmetrical, enveloped by a leathery mantle, which usually develops a hard shell-covering, or external skeleton; a symmetrical nervous system, consisting of several connected nerve bunches, or ganglia. Such is the snail." &mdash; Hinman, 1888

Snail

"Soft unsegmented bodies, bilaterally symmetrical, enveloped by a leathery mantle, which usually develops…

Interior of the ear. There is external to the head a wide-mouthed tube, or ear-trumpet (a), for catching and concentrating the waves of sound. It is movable in many beings, so that they can direct it to the place from which the sound comes. The sound concentrated at the bottom of the ear-tube falls upon a membrane stretched across the channel, like the parchment of an ordinary drum, over the space called the <em>tympanum</em>, or <em>drum of the ear</em> (b), and causes the membrane to vibrate. That its motion may be free, the air contained within the drum has free communication with the external air by the open passage (f), called the <em>eustachian tube</em>, leading to the back of the mouth. A degree of deafness ensues when this tube is obstructed, as in a cold; and a crack, or sudden noise, with immediate return of natural hearing, is, generally experienced when, in the effort of sneezing or otherwise, the obstruction is removed. The vibrations of the membrane of the drum are conveyed further inwards, through the cavity of the drum, by a chain of four bones (not here represented on account of their minuteness), reaching from the centre of the membrane to the <em>oval door</em> or <em>window</em>, leading into the labyrinth (e). The labyrinth, or complex inner compartment of the ear, over which the nerve of hearing is spread as a lining, is full of watery fluid; and, therefore, by the law of fluid pressure, when the force of the moving membrane of the drum, acting through the chain of bones, is made to compress the water, the pressure is felt instantly over the whole cavity. The labyrinth consists of the <em>vestibule</em> (e), the three <em>semicircular canals</em> (c), imbedded in the hard bone, and a winding cavity, called the <em>cochlea</em> (d), like that of a snail-shell, in which fibres, stretched across like harp-strings, constitute the <em>lyra</em>.

Ear

Interior of the ear. There is external to the head a wide-mouthed tube, or ear-trumpet (a), for catching…

A gasteropodous mollusk, differing from the slug in having a large, spiral shell. The species are very numerous, varing somewhat in habits and size, and inhabiting practically all regions where fresh water is obtainable.

Snail

A gasteropodous mollusk, differing from the slug in having a large, spiral shell. The species are very…

Diagram of the mouth of a snail, showing the lingual ribbon. br, brain; c, buccal cavity; co., caelom; g, gullet; j, jaw, against which the radula works; m, mouth; r., radula; r.s., radula sac, in which the radula is renewed as it is worn away in front.

Snail

Diagram of the mouth of a snail, showing the lingual ribbon. br, brain; c, buccal cavity; co., caelom;…

Diagram of a dissection of the reproductive organs of a snail. a.g., albumen gland; c.d., common or hermaphrodite duct; c.g., hermaphrodite gland; d.s., dart sac; f, flagellum; g, genital aperture; m.g., mucous glands; o, oviduct; p, penis; r.s., receptaculum seminis; v.d., vas deferens.

Snail

Diagram of a dissection of the reproductive organs of a snail. a.g., albumen gland; c.d., common or…

A snail shell.

Shell

A snail shell.

A type of seashell.

Boat Shell

A type of seashell.

Helix refers to a genus of snails. They are generally found in cool, damp environments, as they easily suffer from moisture loss.

Helix

Helix refers to a genus of snails. They are generally found in cool, damp environments, as they easily…

A snail approaching bugs swimming at the waters edge.

Snail

A snail approaching bugs swimming at the waters edge.

A snail attempting to rescue an insect at a very slow pace.

Snail Rescue

A snail attempting to rescue an insect at a very slow pace.

"Anatomy of the Snail: a, the mouth; bb, foot; c, anus; dd, lung; e, stomach, covered above by the salivary glands; ff, intestine; g, liver; h, heart; i, aorta; j, gastric artery; l, hepatic artery; k, artery of the foot; mm, abdominal cavity, supplying the place of a cenous sinus; nn, irregular canal in communication with the abdominal cavaty, and carrying the blood to the lung; oo, vessel carrying the blood from the lung to the heart." &mdash; Chambers, 1881

Snail Anatomy

"Anatomy of the Snail: a, the mouth; bb, foot; c, anus; dd, lung; e, stomach, covered above by the salivary…

A long, slender sea shell.

Shell

A long, slender sea shell.

"A front view of a common English house clock with the face taken off, showing the repeating or rack striking movement. Here, M is the hourwheel on the pipeof which the minute-hand is set, N the reversed hour-wheel, and n its pinion, driving the 12-hour wheel H, on whose socket is ficed what is called the snail Y, which belongs to the striking work exclusively. The hammer is raised by the eight pins in the rim of the second wheel in the striking train, in the manner which is obvious." &mdash; Encyclopedia Britanica, 1893

English House Clock

"A front view of a common English house clock with the face taken off, showing the repeating or rack…

A group of carnivorous beetles that mainly feed on snails.

Carrion Beetle

A group of carnivorous beetles that mainly feed on snails.

A group of carnivorous beetles that mainly feed on snails.

Carrion Beetle

A group of carnivorous beetles that mainly feed on snails.

A shell used for games.

Sea Shell

A shell used for games.

A swirl shaped shell.

Shell

A swirl shaped shell.

"Many species hibernate. The land-snails bury themselves in the ground, or conceal themselves under the back of trees, in holes in walls, or even in the stems of large umbelliferous plants. They close the mouth of the shell with a calcareous plate, technically called an epiphragm, which they secrete by means of their mantle, and which is perforated by a small hole to admit the air." &mdash; Encyclopediia Britannica, 1893

Helix Descrtorun

"Many species hibernate. The land-snails bury themselves in the ground, or conceal themselves under…

"Ammonites obtusus." &mdash; Chambers' Encyclopedia, 1875

Ammonite

"Ammonites obtusus." — Chambers' Encyclopedia, 1875

"Ammonites nodosus." &mdash; Chambers' Encyclopedia, 1875

Ammonite

"Ammonites nodosus." — Chambers' Encyclopedia, 1875

In this figure are shown the winding passages of the ear (the labyrinth of the ear). The middle part of it (v) is the vestibule. From this go out on the upper side the semi-circular canals (x,y,z) and on the lower side of the passages of the cochlea (k). The opening into the vestibule (o) is covered by the second drum. Another opening (r) is also covered by a membrane or drum. The cochlea (k) is so called because it is shaped like a snail's shell.

The Cochlea and Passages of the Ear

In this figure are shown the winding passages of the ear (the labyrinth of the ear). The middle part…

The shell of Pyrifusus Newberryi, a species of gastropod.

Pyrifusus Gastropod

The shell of Pyrifusus Newberryi, a species of gastropod.

The interior of the shell of Bulla speciosa, a species of gastropod.

Interior of Bulla Gastropod

The interior of the shell of Bulla speciosa, a species of gastropod.

The exterior of the shell of Bulla speciosa, a species of gastropod.

Exterior of Bulla Gastropod

The exterior of the shell of Bulla speciosa, a species of gastropod.

The shell of Anchura (Drepancheilus) Americana, a species of gastropod.

Anchura Gastropod

The shell of Anchura (Drepancheilus) Americana, a species of gastropod.