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Amphipoda include over 7000 described species of small, shrimp-like crustaceans. Most amphipods are marine, although a few live in freshwater or are terrestrial.

Amphipod

Amphipoda include over 7000 described species of small, shrimp-like crustaceans. Most amphipods are…

A May fly. So called because however long they may live in the larva state, in their perfect form they exist only for a few hours to a few days, taking no food, but only propagating and then dying.

Day Fly

A May fly. So called because however long they may live in the larva state, in their perfect form they…

The official seal of the U.S. state of Alabama in 1889.

Alabama

The official seal of the U.S. state of Alabama in 1889.

The official seal of the U.S. state of Arkansas in 1889.

Arkansas

The official seal of the U.S. state of Arkansas in 1889.

The official seal of the U.S. state of California in 1889.

California

The official seal of the U.S. state of California in 1889.

The official seal of the U.S. state of Colorado in 1889.

Colorado

The official seal of the U.S. state of Colorado in 1889.

The official seal of the U.S. state of Connecticut in 1889.

Connecticut

The official seal of the U.S. state of Connecticut in 1889.

The official seal of the U.S. state of Delaware in 1889.

Delaware

The official seal of the U.S. state of Delaware in 1889.

The official seal of the U.S. state of Florida in 1889.

Florida

The official seal of the U.S. state of Florida in 1889.

The official seal of the U.S. state of Georgia in 1889.

Georgia

The official seal of the U.S. state of Georgia in 1889.

The official seal of the U.S. state of Illinois in 1889.

Illinois

The official seal of the U.S. state of Illinois in 1889.

The official seal of the U.S. state of Indiana in 1889.

Indiana

The official seal of the U.S. state of Indiana in 1889.

The official seal of the U.S. state of Iowa in 1889.

Iowa

The official seal of the U.S. state of Iowa in 1889.

The official seal of the U.S. state of Kansas in 1889.

Kansas

The official seal of the U.S. state of Kansas in 1889.

The official seal of the U.S. state of Kentucky in 1889.

Kentucky

The official seal of the U.S. state of Kentucky in 1889.

The official seal of the U.S. state of Louisiana in 1889.

Louisiana

The official seal of the U.S. state of Louisiana in 1889.

The official seal of the U.S. state of Maine in 1889.

Maine

The official seal of the U.S. state of Maine in 1889.

The official seal of the U.S. state of Maryland in 1889.

Maryland

The official seal of the U.S. state of Maryland in 1889.

The official seal of the U.S. state of Massachusetts in 1889.

Massachusetts

The official seal of the U.S. state of Massachusetts in 1889.

The official seal of the U.S. state of Michigan in 1889.

Michigan

The official seal of the U.S. state of Michigan in 1889.

The official seal of the U.S. state of Minnesota in 1889.

Minnesota

The official seal of the U.S. state of Minnesota in 1889.

The official seal of the U.S. state of Missouri in 1889.

Missouri

The official seal of the U.S. state of Missouri in 1889.

The official seal of the U.S. state of Nebraska in 1889.

Nebraska

The official seal of the U.S. state of Nebraska in 1889.

The official seal of the U.S. state of New Hampshire in 1889.

New Hampshire

The official seal of the U.S. state of New Hampshire in 1889.

The official seal of the U.S. state of New Jersey in 1889.

New Jersey

The official seal of the U.S. state of New Jersey in 1889.

The official seal of the U.S. state of New York in 1889.

New York

The official seal of the U.S. state of New York in 1889.

The official seal of the U.S. state of North Carolina in 1889.

North Carolina

The official seal of the U.S. state of North Carolina in 1889.

The official seal of the U.S. state of Ohio in 1889. Motto: Imperium in Imperio.

Ohio

The official seal of the U.S. state of Ohio in 1889. Motto: Imperium in Imperio.

The official seal of the U.S. state of Oregon in 1889.

Oregon

The official seal of the U.S. state of Oregon in 1889.

The official seal of the U.S. state of Pennsylvania in 1889.

Pennsylvania

The official seal of the U.S. state of Pennsylvania in 1889.

The official seal of the U.S. state of Rhode Island in 1889.

Rhode Island

The official seal of the U.S. state of Rhode Island in 1889.

The official seal of the U.S. state of South Carolina in 1889.

South Carolina

The official seal of the U.S. state of South Carolina in 1889.

The official seal of the U.S. state of Tennessee in 1889.

Tennessee

The official seal of the U.S. state of Tennessee in 1889.

The official seal of the U.S. state of Texas in 1889.

Texas

The official seal of the U.S. state of Texas in 1889.

The official seal of the U.S. state of Vermont in 1889.

Vermont

The official seal of the U.S. state of Vermont in 1889.

The official seal of the U.S. state of Virginia in 1889.

Virginia

The official seal of the U.S. state of Virginia in 1889.

The official seal of the U.S. state of West Virginia in 1889.

West Virginia

The official seal of the U.S. state of West Virginia in 1889.

The official seal of the U.S. state of Wisconsin in 1889.

Wisconsin

The official seal of the U.S. state of Wisconsin in 1889.

The official home of the President of the United States of America.

White House and Trees

The official home of the President of the United States of America.

A bridge which may be drawn up or let down to admit or hinder communication, or to leave a transverse passage free.

Draw Bridge

A bridge which may be drawn up or let down to admit or hinder communication, or to leave a transverse…

"A genus of insects, the type of a very numerous family, which forms the order Parasita or Auoplura. The body is flattened, almost transparent; the segments both of the thorax and abdomen very distinct; the mouth is small and tubular, enclosing a sucker; there are no wings; the legs are short, and are terminated by a claw adapted for taking hold of hairs or feathers. The eyes are simple, one or two on each side of the head. All the species are small, and live parasitically, on human beings, terrestrial mammalia, and birds." — Chambers, 1881

Magnified Louse

"A genus of insects, the type of a very numerous family, which forms the order Parasita or Auoplura.…

"The Chinese lower orders live much in tents. They are ordinarily of matting. These people are clever in their construction, and make them of great size, and with considerable comfort." — Chambers, 1881

Chinese Tent

"The Chinese lower orders live much in tents. They are ordinarily of matting. These people are clever…

An asymetrical fish that live sup to 200m below the surface.

Common Plaice

An asymetrical fish that live sup to 200m below the surface.

"Nocturnal moths, with the organs of the mouth in many cases so atrophied as to be unfit for use. These live but a few days, during which the male sees the female and the latter deposits her eggs." — Encyclopedia Britanica; 1893

Bombycina

"Nocturnal moths, with the organs of the mouth in many cases so atrophied as to be unfit for use. These…

"Nocturnal moths, with the organs of the mouth in many cases so atrophied as to be unfit for use. These live but a few days, during which the male sees the female and the latter deposits her eggs." — Encyclopedia Britanica; 1893

Bombycina

"Nocturnal moths, with the organs of the mouth in many cases so atrophied as to be unfit for use. These…

"Nocturnal moths, with the organs of the mouth in many cases so atrophied as to be unfit for use. These live but a few days, during which the male sees the female and the latter deposits her eggs." — Encyclopedia Britanica; 1893

Bombycina

"Nocturnal moths, with the organs of the mouth in many cases so atrophied as to be unfit for use. These…

"Nocturnal moths, with the organs of the mouth in many cases so atrophied as to be unfit for use. These live but a few days, during which the male sees the female and the latter deposits her eggs." — Encyclopedia Britanica; 1893

Bombycina

"Nocturnal moths, with the organs of the mouth in many cases so atrophied as to be unfit for use. These…

A fish with a blunt snout and fins free of spines. Color is uniformly blueish above without dark bands or black on the vertical fins, and silvery or golden on the sides.

Common Pompano

A fish with a blunt snout and fins free of spines. Color is uniformly blueish above without dark bands…

A rodent that live sunderground on prairies. They are about a foot long, very stout, squat, paunchy form with low ears and ver short tail.

Prairie Dogs

A rodent that live sunderground on prairies. They are about a foot long, very stout, squat, paunchy…

Dytiscus Harminieri, a genus of predatory, diving beetles that usually live in wetlands and ponds.

Great Diving Beetle

Dytiscus Harminieri, a genus of predatory, diving beetles that usually live in wetlands and ponds.

Dytiscus Harminieri, a genus of predatory, diving beetles that usually live in wetlands and ponds.

Great Diving Beetle

Dytiscus Harminieri, a genus of predatory, diving beetles that usually live in wetlands and ponds.

"The instrument is supported on a strong tripod, fitted with levelling screws; to this tripod is fixed the azimuth circle and a long vertical steel axis. Fitting on this axis is a hollow axis which carries on its uper end a short transverse horizontal axis. This latter carries the telescope, which, supported at the center of its length, is free to rotate in a vertical plane. The telescope is thus mounted excentrically with respect to the vertical axis around which it revolves." — Encyclopedia Britannica, 1893

Zenith Telescope

"The instrument is supported on a strong tripod, fitted with levelling screws; to this tripod is fixed…

A musical instrument consisting essentially of one or more graduated sets of smll free reeds of metal, which are sounded by streams of air set in motion by a bellows, and controlled from a keyboard like tha of a pianoforte.

Reed Organ

A musical instrument consisting essentially of one or more graduated sets of smll free reeds of metal,…

"Muscular cells of medusae (Lizzia). The uppermost is a purely muscular cell from the sub-umbrella; the two lower are epidermo-muscular cells from the base of a tentacle; the upstanding nucloated portion forms part of the epidermal mosaic on the free surface of the body." — Encyclopedia Britannica, 1893

Muscular Cells

"Muscular cells of medusae (Lizzia). The uppermost is a purely muscular cell from the sub-umbrella;…

"A, a hydriform person giving rise to medusiform persons by budding from the margin of the disc; B, free swimming medusa (Steenstrupia of Forbes) detached from the same, with manubrial genitalia (Anthomedusae) and only one tentacle." — Encyclopedia Britannica, 1893

Corymorpha

"A, a hydriform person giving rise to medusiform persons by budding from the margin of the disc; B,…

"Diagram of a colony of Campanularia, showing four forms of persons. A, portion of a fixed colony; a, hydriform person; b, bud-bearing hydriform person (blastostyle); B, free-swimming colony, being sexless medusiform person (blastoscheme of Allmen), with modified medusiform persons budding from its radiating canals, as sporosacs." — Encyclopedia Britannica, 1893

Campanularia

"Diagram of a colony of Campanularia, showing four forms of persons. A, portion of a fixed colony; a,…

"a, the osseous septum grooved for the passage of the cochlear nerve b, which terminates by a free end inside the chamber c, along the floor of which it lies for a short distance; d, d are the two layers of the membranous septum. Lying in contact with the end of the nerve is the enlarged extremity of a rod e, which is connected in a flail-like manner by the hinge f to another rod, which is fixed at g." — Chambers' Encyclopedia, 1875

Auditory Nerve

"a, the osseous septum grooved for the passage of the cochlear nerve b, which terminates by a free end…

"A glass tube about 33 inches in length, open at one end, is completely filled with mercury, and being firmly closed by the thumb, is inverted and placed vertically in a cup containing mercury. When the thumb is removed, the mercury sinks in the tube till it stands, generally, about 30 inches above the level of the mercury in the cup, leaving in the upper part a space free of air, which receiveds the name of the Torricellian vacuum." — Chambers' Encyclopedia, 1875

Barometer

"A glass tube about 33 inches in length, open at one end, is completely filled with mercury, and being…

"Four stages in the development of the trilobite Agnostus nudus. A, Youngest stage with no mesosomatic somites; B and C, stages with two mesosomatic somites between the prosomatic and telsonic carapaces; D, adult condition, still with only two free mesosomatic somites." — The Encyclopedia Britannica, 1910

Agnostus Nudus

"Four stages in the development of the trilobite Agnostus nudus. A, Youngest stage with no mesosomatic…

"Five stages in the development of the trilobite Sao hirsuta. A, Youngest stage. B, Older stage with distinct pygidial carapace. C, Stage with two free mesosomatic somites between the prosomatic and telsonic carapaces. D, Stage with seven free intermediate somites. E, Stage with twelve free somites; the telsonic carapace has not increased in size. a, Lateral eye. g, So-called facial "suture" (not really a suture). p, Telsonic carapace." — The Encyclopedia Britannica, 1910

Sao Hirsuto

"Five stages in the development of the trilobite Sao hirsuta. A, Youngest stage. B, Older stage with…