A breed of cattle that is commonly known as the world's highest production dairy animal.

Holstein Cow

A breed of cattle that is commonly known as the world's highest production dairy animal.

A Jersey cow, valued for the richness of their milk.

Jersey Cow

A Jersey cow, valued for the richness of their milk.

A small breed of dairy cattle.

Jersey Cow

A small breed of dairy cattle.

A coyote in the desert.

Coyote

A coyote in the desert.

The large reptile, the crocodile.

Crocodile

The large reptile, the crocodile.

"Cast or mold of the interior of the left ventricle of the heart of a deer. Shows that the left ventricular cavity in conical and spiral in its nature."—Pettigrew, 1874

Heart of a Deer

"Cast or mold of the interior of the left ventricle of the heart of a deer. Shows that the left ventricular…

One of the largest deer species.

Red Deer

One of the largest deer species.

"The bones in the extremities of this the fleetest of quadrupeds are inclined very obliquely towards each other, and towards the scapular and iliac bones. This arrangement increases the leverage of the muscular system and confers great rapidity on the moving parts."—Pettigrew, 1874

Skeleton of the Deer

"The bones in the extremities of this the fleetest of quadrupeds are inclined very obliquely towards…

"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." — Chambers' Encyclopedia, 1875

Dentalium

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

A dog

Dog

A dog

An illustration of a dog.

Dog

An illustration of a dog.

An illustration of a dog attempting to climb a wall.

Dog Climbing

An illustration of a dog attempting to climb a wall.

An illustration of a dog wearing boxing gloves and pants.

Dog Wearing Boxing Gloves & Pants

An illustration of a dog wearing boxing gloves and pants.

An illustration of a small dog holding a fan with its tail.

Dog with Fan

An illustration of a small dog holding a fan with its tail.

An illustration of a black and white dog with black spots.

Black Spotted Dog

An illustration of a black and white dog with black spots.

"Bulldog, a variety of the common dog, remarkable for its short, broad muzzle, and the projection of its lower jaw, which causes the lower front teeth to protrude beyond the upper." -Vaughan, 1906

Bulldog

"Bulldog, a variety of the common dog, remarkable for its short, broad muzzle, and the projection of…

"The bull terrier was originally from a cross between the bulldog and the terrier. It is smaller than the bulldog, lively, docile, and very courageous." -Vaughan, 1906

Bull Terrier

"The bull terrier was originally from a cross between the bulldog and the terrier. It is smaller than…

A common breed of dog.

Bull-dog

A common breed of dog.

Two breeds of dog, a fox terrier and a fox-hound.

Fox Terrier and Fox-Hound

Two breeds of dog, a fox terrier and a fox-hound.

An illustration of a grey hound.

Grey Hound

An illustration of a grey hound.

An image of a mastiff and pug, two breeds of dogs.

Mastiff and Pug

An image of a mastiff and pug, two breeds of dogs.

An illustration of a scared dog.

Scared Dog

An illustration of a scared dog.

A large breed of dog from the Italian and Swiss Alps.

St. Bernard

A large breed of dog from the Italian and Swiss Alps.

A breed of dog.

Skye Terrier

A breed of dog.

A wild donkey.

Wild Donkey

A wild donkey.

An example of self-closing pen doors.

Pen Doors

An example of self-closing pen doors.

An illustration of a baby dragon crying.

Baby Dragon Crying

An illustration of a baby dragon crying.

An illustration of a small dragon doodad.

Dragon Doodad

An illustration of a small dragon doodad.

An illustration of a dragon holding a knight and a horse in his claw.

Dragon Holding Knight & Horse in Claw

An illustration of a dragon holding a knight and a horse in his claw.

An illustration of a mother dragon caring for her baby dragons.

Mother Dragon with Baby Dragons

An illustration of a mother dragon caring for her baby dragons.

"The Red-Throated Dragon shows a large membranous expansion (b b) situated between the anterior (d d) and posterior extremities, and supported by the ribs. The dragon by this arrangement can take extensive leaps with perfect safety."—pettigrew, 1874

Red-Throated Dragon

"The Red-Throated Dragon shows a large membranous expansion (b b) situated between the anterior (d d)…

he Mandarin Duck (Aix galericulata), or just Mandarin, is a medium-sized perching duck, closely related to the North American Wood Duck. It is 41-49 cm long with a 65-75 cm wingspan. The adult male is a striking and unmistakable bird. It has a red bill, large white crescent above the eye and reddish face and "whiskers". The breast is purple with two vertical white bars, and the flanks ruddy, with two orange "sails" at the back. The female is similar to female Wood Duck, with a white eye-ring and stripe running back from the eye, but is paler below, has a small white flank stripe, and a pale tip to its bill

Mandarin Duck

he Mandarin Duck (Aix galericulata), or just Mandarin, is a medium-sized perching duck, closely related…

An illustration of a egg sack of a nursehound fish.

Egg Sack of Nursehound

An illustration of a egg sack of a nursehound fish.

Elephants are mammals, and the largest living land animals.

Elephant

Elephants are mammals, and the largest living land animals.

A famous large African Bush Elephant used in the P. T. Barnum circus.

Jumbo

A famous large African Bush Elephant used in the P. T. Barnum circus.

"A portable engine and feed grinder that saves frequent trips to the Grist Mill."—The Federal Digest, 1921

Portable Engine

"A portable engine and feed grinder that saves frequent trips to the Grist Mill."—The Federal…

The European bullhead, Cottus gobio, is a fish of the Cottidae family that is widely distributed in Europe. It is a type of sculpin and has two alternative names: miller's thumb and tommy logge.

European Bullhead

The European bullhead, Cottus gobio, is a fish of the Cottidae family that is widely distributed in…

An illustration of a fish fin.

Fish Fin

An illustration of a fish fin.

"The Flying fish, with wings expanded and elevated in the act of flight. This anomalous and interesting creature is adapted both for swimming and flying. The swimming-tail is consequently retained, and the pectoral fins, which act as wings, are enormously increased in size."—Pettigrew, 1874

Flying Fish

"The Flying fish, with wings expanded and elevated in the act of flight. This anomalous and interesting…

Six fish.

Six Fish

Six fish.

An extreme form of the expanded foot, which is adapted for swimming.

Expanded Foot

An extreme form of the expanded foot, which is adapted for swimming.

The foot of an otter, which is serviceable in and out of the water.

Otter Foot

The foot of an otter, which is serviceable in and out of the water.

The red fox, a small canine known for its cunning.

Red Fox

The red fox, a small canine known for its cunning.

A red fox.

Red Fox

A red fox.

Found in Oueensland and other parts of Australia, this lizard belongs to the family Agamidae. It reaches a length of about thirty-two inches, and receives its name from the presence of a large expansion of skin at either side of the neck. This frill is notched at the edge, has special supporting cartilages, and by means of muscles can be folded or expanded at will. The lizard walks upon its hind limbs, like the extinct Iguanodon, having the fore limbs hanging down. When at bay, it expands the frill to its fullest extent and opens the mouth wide, exposing its teeth. It inhabits sandy districts.

Frilled Lizard

Found in Oueensland and other parts of Australia, this lizard belongs to the family Agamidae. It reaches…

An illustration of a frog ice skating on a lake wearing a hat and jacket.

Frog Ice Skating on Lake

An illustration of a frog ice skating on a lake wearing a hat and jacket.

An illustration of a frog sitting on the bank of a pond and scratching his head.

Frog Sitting on Bank and Scratching Head

An illustration of a frog sitting on the bank of a pond and scratching his head.

An illustration of a frog sitting on the bank of a pond looking out into the water.

Frog Sitting on Bank Looking at Pond

An illustration of a frog sitting on the bank of a pond looking out into the water.

The Gadfly of the sheep lays its eggs in the nostrils of the sheep. There, the maggots hatch and live in the frontal sinuses until fully grown, they then drop to the ground and bury themselves. After pupation, they emerge as flies. This illustration is natural size and shows a Gadfly larvae.

Gadfly of Sheep

The Gadfly of the sheep lays its eggs in the nostrils of the sheep. There, the maggots hatch and live…

Also known as a Solan Goose (Sula bassana), the Gannet is a large marine bird which nests in scattered localities in most parts of the world. Its specific name refers to the fact that it has long been a denizen of Bass Rock -- a famous craggy islet on the coast of England. This bird also nests on Bird Rock in the gulf of St. Lawrence, and other species exist in the tropics. It belongs to the same sub-order as the cormorant, and may be recognized by the fact that, as in the latter, all four toes are united by a web. 

Its bill is long, strong, and compressed to a point. In adult life, the plumage is white, save for the black primaries and a buff patch on the head or neck; the young are dusky, and do not acquire the white plumage until their sixth year. Their nests contain only one egg.

Gannet

Also known as a Solan Goose (Sula bassana), the Gannet is a large marine bird which nests in scattered…

A small group of fairly uniform animals which live among Rotifers and Protozoa at the bottom of ponds and marshes.

Gastrotricha

A small group of fairly uniform animals which live among Rotifers and Protozoa at the bottom of ponds…

A gecko is a small, four-footed member of the lizard family Geckonidae. Geckos are widely distributed throughout the world, inhabiting primarily warm countries. They are usually dull in color; the eyes are without movable lids; the tail is brittle; while the feet of most species are remarkable for their adhesive digits, which enable the animal to not only climb on smooth surfaces, but even to run along ceilings and back downward. The geckos are insect-eaters and are harmless to man.

Gecko

A gecko is a small, four-footed member of the lizard family Geckonidae. Geckos are widely distributed…

Gepyrea is a name formerly given to a class of worms which included three families: (1) Priapulidae; (2) Sipunculidae; (3) Echiuridae. The three families have little in common, and the class Gephyrea has ceased to exist in strict systematic zoology. This illustration shows and example from each of the three families: (1) Priapulus caudatus; (2) Sipunculus nudus; (3) Echiurus Pallasi.

Gephyrea

Gepyrea is a name formerly given to a class of worms which included three families: (1) Priapulidae;…

An African mammal and the tallest of all land-living animal species.

Giraffe

An African mammal and the tallest of all land-living animal species.

An illustration of a young girl watching a bird in a small tree.

Girl Looking at Bird in Tree

An illustration of a young girl watching a bird in a small tree.

An illustration of a young girl wearing a bonnet kneeling down beside and petting a small lamb.

Young Girl Kneeling & Petting Lamb

An illustration of a young girl wearing a bonnet kneeling down beside and petting a small lamb.

An illustration of a young girl holding an umbrella with a dog following behind holding a pail in its mouth.

Girl with Umbrella & Dog in Rainstorm

An illustration of a young girl holding an umbrella with a dog following behind holding a pail in its…

"Goad-spur, 13th or 14th century. A spur without a rowel and having a single more or less blunt point. In the early middle ages this was the common form in Europe." -Whitney, 1911

Goad-Spur

"Goad-spur, 13th or 14th century. A spur without a rowel and having a single more or less blunt point.…

The Angora goat is named for the region in Turkey where it is from and is known for its long coat.

Angora Goat

The Angora goat is named for the region in Turkey where it is from and is known for its long coat.

A breed of domestic goat.

Angora Goat

A breed of domestic goat.