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"A division of thallogenous chlorophyllous cryptograms found in the most part in the sea or in freshwater."-Whitney, 1902

Algae

"A division of thallogenous chlorophyllous cryptograms found in the most part in the sea or in freshwater."-Whitney,…

"a genus of algae. P.nivalis (red-snow) appears on the surface of snow, tinging extensive tracts in the Arctic regions or amongst the Alps, in an incredibly short space of time, with a deep crimson. This plant may be regarded a s one of the simplest forms of vegetation." -Marshall

Protococcus Algae

"a genus of algae. P.nivalis (red-snow) appears on the surface of snow, tinging extensive tracts in…

Amoeba are one-celled organisms of the Kingdom Protista

Amoeba

Amoeba are one-celled organisms of the Kingdom Protista

Small plant of Chondrus crispus, Carrageen Moss; the spots represent the fructification, consisting of numerous tetraspores in bunches in the substance of the plant.

Chondrus Crispus

Small plant of Chondrus crispus, Carrageen Moss; the spots represent the fructification, consisting…

Two of the tetraspores from the Chondrus crispus.

Chondrus Crispus Tetraspores

Two of the tetraspores from the Chondrus crispus.

The growing end of a branching Conferva (Cladophora glomerata), showing how, by a kind of budding growth, a new cell is formed by a cross partition separating the newer tip from the older part below; also, how the branches arise.

Conferva

The growing end of a branching Conferva (Cladophora glomerata), showing how, by a kind of budding growth,…

Coralline Rock is a type of rock formed by the death of layers of Coralline algae. It is visually quite bright like the algae, and is often desired as aquarium decoration. Since it is formed from the dead algae, it contains some nutrients and calcium carbonate, which has allowed it to be used in some building structures.

Coralline

Coralline Rock is a type of rock formed by the death of layers of Coralline algae. It is visually quite…

Section through a conceptacle of Delesseria Leprieurei, showing the spores, which are single specialized cells, two or three in a row.

Delesseria Lepriuerei

Section through a conceptacle of Delesseria Leprieurei, showing the spores, which are single specialized…

A major group of eukaryotic algae, one of the most common type of phytoplankton. Most diatoms are unicelular, although some form chains or simple colonies.

Diatom

A major group of eukaryotic algae, one of the most common type of phytoplankton. Most diatoms are unicelular,…

Diatoms are a major group of eukaryotic algae. The individuals are joined in a zigzag band.

Diatoms

Diatoms are a major group of eukaryotic algae. The individuals are joined in a zigzag band.

Magnified section through a fertile conceptacle of Rockweed, showing the large spores in the midst of threads of cells.

Fertile Conceptacle of Rockweed

Magnified section through a fertile conceptacle of Rockweed, showing the large spores in the midst of…

"In general, fungi are low plants which do not contain chlorophyll, in contrast with the algae, which do." — Beach, 1909

Fungi

"In general, fungi are low plants which do not contain chlorophyll, in contrast with the algae, which…

Globigerina, a type of foraminiferan, has a kind of chalk-like shell.

Globigerina

Globigerina, a type of foraminiferan, has a kind of chalk-like shell.

Halimeda tuna, a lime-secreting green alga from the modern sea; attached to rocks.

Halimeda Tuna

Halimeda tuna, a lime-secreting green alga from the modern sea; attached to rocks.

Oarweed or Tangle (Laminaria digitata) is a species of kelp common to the British Isles and Northeast America.

Oarweed

Oarweed or Tangle (Laminaria digitata) is a species of kelp common to the British Isles and Northeast…

Oarweed or Kelp (Laminaria longicruris) is a species of kelp common to Northeast America.

Oarweed

Oarweed or Kelp (Laminaria longicruris) is a species of kelp common to Northeast America.

"Liteocircus annularis. cent. caps, central capsule; ext. caps. pr, extra-capsular protoplasm; int. cap. pr, intra-capsular protoplasm; nu, nucleus; psd, pseudopods; skel, skeleton; z, cells of zooxanthella." -Parker, 1900

L. Annularis

"Liteocircus annularis. cent. caps, central capsule; ext. caps. pr, extra-capsular protoplasm; int.…

Laminaria saccharina belongs to the group Laminariæ, a group of algæ belonging to the Phæosporeæ, a subdivision of the Phæosphyceæ, or brown seaweeds. The propagative cells are always swarm-spores of similar form and size; and these are produced in unilocular sporangia. The thallus has a stalk, often of considerable thickness, which is attached below to rocks or other substratum by means of rootlike growth, and ends above in a flat lamina, which may be divided or undivided.

Laminaria Saccharina

Laminaria saccharina belongs to the group Laminariæ, a group of algæ belonging to the Phæosporeæ,…

Similar section of a sterile conceptacle, containing slender antheridia.

Marine Algae of New England

Similar section of a sterile conceptacle, containing slender antheridia.

Mosses can withstand a variety of temperatures. They grow on rocks or plant life.

Moss

Mosses can withstand a variety of temperatures. They grow on rocks or plant life.

Pandorina, a one-celled, fresh water form, is a genus of green algae composed of 8, 16, or sometimes 32 cells, held together at their bases to form a globular colony surrounded by mucilage. The cells are ovoid or slightly narrowed at one end to appear keystone- or pear-shaped.

Pandorina

Pandorina, a one-celled, fresh water form, is a genus of green algae composed of 8, 16, or sometimes…

Paramecium are one-celled organisms. They are elliptical in shape and active swimmers.

Paramecium

Paramecium are one-celled organisms. They are elliptical in shape and active swimmers.

Paramecium are one-celled organisms. They are elliptical in shape and active swimmers.

Paramecium

Paramecium are one-celled organisms. They are elliptical in shape and active swimmers.

"Hydra viridis, the freshwater polyp. The animal is attached to the stem of a plant, and is represented with the base of attachment uppermost; the mouth, not actually seen in the drawing, is at the lower extremity of the body, surrounded by the circle tentacles." — Encyclopaedia Britannica Company, 1910

Freshwater Polyp

"Hydra viridis, the freshwater polyp. The animal is attached to the stem of a plant, and is represented…

A genus of single-celled algae often forming a yellowish-green stratum on trees' damp walls, and in shallow pools.

Protococcus

A genus of single-celled algae often forming a yellowish-green stratum on trees' damp walls, and in…

Upper end of a Rockweed, Fucus vesiculosus.

Rockweed

Upper end of a Rockweed, Fucus vesiculosus.

Agarum Turneri, Sea Colander, so called from the perforations with which the frond, as it grows, becomes riddled.

Sea Colander

Agarum Turneri, Sea Colander, so called from the perforations with which the frond, as it grows, becomes…

Volvox is one of the best-known chlorophytes, a division of green algae, and is the most developed in a series of genera that form spherical colonies. This mature Volvox colony is composed of numerous flagellate cells.

Volvox

Volvox is one of the best-known chlorophytes, a division of green algae, and is the most developed in…

The vorticella is an interesting protozoan. It is found on submerged stems and leaves in stagnant water, sometimes appearing like a delicate white fringe.

Vorticella

The vorticella is an interesting protozoan. It is found on submerged stems and leaves in stagnant water,…