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A type of Ganoid fish. Ganoid is an order of fishes included seven living genera, whose members are all found in fresh water. The members of these genera are distinguished from their nearest allies, the teleosteans, or bony fish, by the presence of a spiral valve in the intestine, the fact that the tail is frequently heterocercal or unequally lobed, the skeleton often, at least in part, cartilaginous, and the skin furnished with bony scales or scutes (ganoid scales). This particular species is a Bow-fin.

Amia Occidentalis

A type of Ganoid fish. Ganoid is an order of fishes included seven living genera, whose members are…

A type of Ganoid fish. This particular species is a Reed fish.

Calamoichthys Calabaricus

A type of Ganoid fish. This particular species is a Reed fish.

Chara vulgaris, a modern lime-secreting alga, growing in fresh water. An important marl and limestone former.

Chara Vulgaris

Chara vulgaris, a modern lime-secreting alga, growing in fresh water. An important marl and limestone…

Chara vulgaris, a recent calcareous alga (fresh water); sport-vessel with corona. This is frequently found in great numbers in fresh-water limestones, showing their mode of origin.

Chara Vulgaris

Chara vulgaris, a recent calcareous alga (fresh water); sport-vessel with corona. This is frequently…

"The Grayling is a genus of fresh-water fishes in the salmon family, distinguished from trout, etc., by the smaller mouth and teeth, and by the long, many-rayed dorsal fin. The genus is represented by five species inhabiting clear streams in North America, Europe and Asia."—(Charles Leonard-Stuart, 1911)

Grayling

"The Grayling is a genus of fresh-water fishes in the salmon family, distinguished from trout, etc.,…

A type of Ganoid fish. This particular species is a gar-pike.

Lepidosteus Occeus

A type of Ganoid fish. This particular species is a gar-pike.

The medicinal leech is a leech used in bloodletting. It lives in fresh water, and is common in Germany, Bohemia, and Russia. Its diet consists of the blood of vertebrates, to which the leech attaches itself by its suckers. Of these, one is posterior and imperforate, the other anterior, with the mouth in the center. Within the mouth lie three triangular tooth-plates, by means of which a small triradiate incision is made in the skin of the animal attacked. This done, the leech proceeds to fill its crop, which extends almost from end to end of the body, and has eleven lateral pockets. When these have become distended with blood, the leech drops from its temporary host, and the slow process of digestion begins. Leeches usually move by attaching alternately the anterior and posterior suckers, somewhat after the fashion of a 'looping caterpillar', but they can also swim by movements of the whole body. The eggs are laid in cocoons in damp earth.

Medicinal Leech

The medicinal leech is a leech used in bloodletting. It lives in fresh water, and is common in Germany,…

A type of Ganoid fish. This particular species is a Spoonbill.

Polyodon Osseus

A type of Ganoid fish. This particular species is a Spoonbill.

A type of Ganoid fish. This particular species is a Reed fish.

Polypterus Bichir

A type of Ganoid fish. This particular species is a Reed fish.

A type of Ganoid fish.This particular species is a Shovel-beak.

Scaphirhynchus Platyrhynchus

A type of Ganoid fish.This particular species is a Shovel-beak.

"Trout is a term applied generally to various species of fishes belonging to the salmon family. The best-known species, and that which par excellence receives the name, is the common trout, a fish which inhabits clear and running streams. The average weight of the common trout is from three-fourths to one pound. "—(Charles Leonard-Stuart, 1911)

Common River Trout

"Trout is a term applied generally to various species of fishes belonging to the salmon family. The…