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"Agua-Toad (Bufo marinus), a very large and common South American toad, with enormous parotid glands."-Whitney, 1902

Bufo Toad

"Agua-Toad (Bufo marinus), a very large and common South American toad, with enormous parotid glands."-Whitney,…

An amphibian with a toothed upper jaw and subcylindric or little dilated sacral diapopyses.

Cystignathidae

An amphibian with a toothed upper jaw and subcylindric or little dilated sacral diapopyses.

A cluster of frog eggs

Frog Eggs

A cluster of frog eggs

Frog

Frog

Frog

A frog laying on a thick branch.

Frog

A frog laying on a thick branch.

A small frog in from grass.

Frog

A small frog in from grass.

"At their birth they respire by means of gills, and consequently resemble fishes. As they progress in age, they undergo permanent metamorphoses - they acquire lungs and thenceforth an aerial respiration."

Alphabet Frog (Ceratophrys Boiei)

"At their birth they respire by means of gills, and consequently resemble fishes. As they progress in…

"The body of the Edible Frog sometimes attains a length, from the extremity of the muzzle to the end of the hind feet, of six to eight inches."

The Edible Frog

"The body of the Edible Frog sometimes attains a length, from the extremity of the muzzle to the end…

A tree frog perched on many branches.

Tree Frog

A tree frog perched on many branches.

"A genus of anurous amphibians, or tailless batrachians, of the family Discoglossidæ, sometimes made the type of a family Alytidæ."-Whitney, 1902

Nurse Frog

"A genus of anurous amphibians, or tailless batrachians, of the family Discoglossidæ, sometimes…

Commonly known as the horned toad, Douglas's phrynosoma was first discovered in Salt Lake Valley.

Douglas's phrynosoma

Commonly known as the horned toad, Douglas's phrynosoma was first discovered in Salt Lake Valley.

The development of a toad, image 1.

Toad

The development of a toad, image 1.

The development of a toad, image 3.

Toad

The development of a toad, image 3.

The development of a toad, image 4.

Toad

The development of a toad, image 4.

The development of a toad, image 5.

Toad

The development of a toad, image 5.

Toads have thicker skin than frogs.

Toad

Toads have thicker skin than frogs.

A tailless amphibian.

Toad

A tailless amphibian.

An illustration of a California horned toad.

California horned toad

An illustration of a California horned toad.

Toads are similar to frogs but generally are more squat and sedentary.

Common Toad

Toads are similar to frogs but generally are more squat and sedentary.

"It is a harmless animal, though its ungainly appearance has made it the subject of general aversion." — Goodrich, 1859

Common European toad

"It is a harmless animal, though its ungainly appearance has made it the subject of general aversion."…

"Resembles the common toad of Europe in appearance: there are also other foreign species, among which is the accoucheur toad, which not only assists the female in excluding her eggs, but attaches them afterwards to his own hind-legs, where the young are developed until they arrive at the tadpole state, when he visists the water and the escape. This species is common in the vicinity of Paris." — Goodrich, 1859

Natter-jack toad

"Resembles the common toad of Europe in appearance: there are also other foreign species, among which…

<i>Scaphiopus holbrooki</i>. Illustration of the American spadefoot toad, native to Canada, the United States, and Mexico. It is a roundish toad with large, protruding eyes.

Spadefoot Toad

Scaphiopus holbrooki. Illustration of the American spadefoot toad, native to Canada, the United States,…

"Is of a brownish or light ash-color, and is found under logs and the bark of decayed trees." — Goodrich, 1859

Squirrel Tree-toad

"Is of a brownish or light ash-color, and is found under logs and the bark of decayed trees." — Goodrich,…

This toad is oviparous. She lays eggs, and the male piles them upon her back where they develop inside and atop her skin.

Surinam toad

This toad is oviparous. She lays eggs, and the male piles them upon her back where they develop inside…

"At the breeding season the back of the female exhbits a number of small pits; into these pits the male collects the eggs laid by the female in the edge of the water, and presses them down; they are then covered by a natural operculum, and there they are hatched, in the same manner as the free larvae of the other Batrachians." — Goodrich, 1859

Surinam toad

"At the breeding season the back of the female exhbits a number of small pits; into these pits the male…

"When the female has laid her eggs, the male takes them and piles them on her back." Her skin becomes inflamed until the eggs are absorbed into her skin.

Surinam Toad

"When the female has laid her eggs, the male takes them and piles them on her back." Her skin becomes…

"Many cells, but without differentiation into stem and leaf; growing horizontally in spreading shoots or fronds, as the algae, or sea-weeds; fungi, or toad-stools; and the lichens.

Toad-stool

"Many cells, but without differentiation into stem and leaf; growing horizontally in spreading shoots…

A genus of tailless amphibians allied to the frogs, but differing from them in having a thicker and more clumsy body. The hind legs are short and the toes slightly webbed, thus making it impossible to leap with facility.

Toads

A genus of tailless amphibians allied to the frogs, but differing from them in having a thicker and…