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The beaver is distinguished from all other rodents by its flat and scaly tail. Its hind feet are webbed, and with these and its tail it is an expert swimmer. Its incisor teeth are large and uncommonly hard.

Beaver

The beaver is distinguished from all other rodents by its flat and scaly tail. Its hind feet are webbed,…

"The Beaver is a quadruped of the order Rodentia, or gnawers, the only species of its genus. It is very widely distributed, being found in the N. parts of Europe, Asia, and America, nowadays most abundantly in the N. and thinly peopled parts of North America, dwelling in communities on the banks of rivers and lakes."—(Charles Leonard-Stuart, 1911)

Beaver

"The Beaver is a quadruped of the order Rodentia, or gnawers, the only species of its genus. It is very…

Close-up illustration of scalpriform incisor of a beaver. It is "chisel-shaped; having the character of a chisel-tooth; truncate at the end and beveled there to a sharp edge; specifically said of the incisor teeth of rodents, and the similar teeth of a few other mammals." —Whitney, 1889

Scalpriform, Left Lower Incisor of a Beaver

Close-up illustration of scalpriform incisor of a beaver. It is "chisel-shaped; having the character…

A nocturnal, semi-aquatic rodent.

Beavers

A nocturnal, semi-aquatic rodent.

A musk rat.

Desman

A musk rat.

"The closed helmet seen in profile is appropriated to esquires and gentlemen." -Hall, 1862

Closed Helmet Direct

"The closed helmet seen in profile is appropriated to esquires and gentlemen." -Hall, 1862

"The helmet without bars, with the beaver open, standing directly fronting the spectator, denotes a knight." -Hall, 1862

Open Helmet Direct

"The helmet without bars, with the beaver open, standing directly fronting the spectator, denotes a…

"BEAVER. That part of the helmet that defends the sight." -Hall, 1862

Helmet with Beaver

"BEAVER. That part of the helmet that defends the sight." -Hall, 1862

Many animals of the monotremata classification.

Monotremata

Many animals of the monotremata classification.

An animal that looks very strange, like it is pieces together from many other animals.

Platypus

An animal that looks very strange, like it is pieces together from many other animals.

The skeleton of a beaver.(c) cervical region of vertebral column; (d) dorsal region; (b) lumbar region; (s) sacrum; (t) caudal region.

Beaver Skeleton

The skeleton of a beaver.(c) cervical region of vertebral column; (d) dorsal region; (b) lumbar region;…

Skull of the Beaver.

Beaver Skull

Skull of the Beaver.

The totem or emblem of the Huron, a Native American tribe has a beaver on top of a log in the water.

Huron Totem

The totem or emblem of the Huron, a Native American tribe has a beaver on top of a log in the water.

A woodchuck.

Woodchuck

A woodchuck.