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"Fig. 1, Monads; 2, Forms assumed by the Ameoba; 3, Flask Animalcules, Enchelis; 4, Actinophrys sol; 5, Euglena viridis ; 6, Gonium pectorale; 7, Trachelias anas ; 8, Paramecium aurelia ; 9, Navicula; 10, Vibrie Spirillum; 11, Vorticella Stentor" — Goodrich, 1859

Forms of the animalcules, magnified

"Fig. 1, Monads; 2, Forms assumed by the Ameoba; 3, Flask Animalcules, Enchelis; 4, Actinophrys sol;…

Modern Foraminiferal types - Calcarina

Calcarina

Modern Foraminiferal types - Calcarina

"Enchylis pupa. The typical genus of the family Encheliyidae, with simply ciliate terminal mouth, as in E. farcimen." -Whitney, 1911

Ciliate

"Enchylis pupa. The typical genus of the family Encheliyidae, with simply ciliate terminal mouth, as…

An illustration of the formation of the Cyclospora Cayetanensis egg-cell.

Formation of Cyclospora Cayetanensis Egg-cell

An illustration of the formation of the Cyclospora Cayetanensis egg-cell.

An illustration of the formation of the Cyclospora Cayetanensis egg-cell.

Formation of Cyclospora Cayetanensis Egg-cell

An illustration of the formation of the Cyclospora Cayetanensis egg-cell.

An illustration of the formation of the Cyclospora Cayetanensis egg-cell.

Formation of Cyclospora Cayetanensis Egg-cell

An illustration of the formation of the Cyclospora Cayetanensis egg-cell.

An illustration of the formation of the CCyclospora Cayetanensis spermatozooids

Formation of Cyclospora Cayetanensis Spermatozooids

An illustration of the formation of the CCyclospora Cayetanensis spermatozooids

An illustration of the growth of a Cyclospora Cayetanensis Spore in the nucleus.

Growth of Cyclospora Cayetanensis Spore in Nucleus

An illustration of the growth of a Cyclospora Cayetanensis Spore in the nucleus.

An illustration of the growth of spores of a Cyclospora Cayetanensis.

Formation of Cyclospora Cayetanensis Spores

An illustration of the growth of spores of a Cyclospora Cayetanensis.

An illustration of the growth of spores of a Cyclospora Cayetanensis.

Formation of Cyclospora Cayetanensis Spores

An illustration of the growth of spores of a Cyclospora Cayetanensis.

An illustration of the fertilization of the egg by the spermatozooids of a Cyclospora Cayetanensis.

Fertilization of Cyclospora Cayetanensis

An illustration of the fertilization of the egg by the spermatozooids of a Cyclospora Cayetanensis.

An illustration of the fusion of egg and sperm-nuclei of a Cyclospora Cayetanensis.

Fusion of Egg and Sperm-nuclei of Cyclospora Cayetanensis

An illustration of the fusion of egg and sperm-nuclei of a Cyclospora Cayetanensis.

An illustration of the formation of capsules about two sporoblasts of Cyclospora Cayetanensis.

Formation of Capsules about the Two Sporoblasts

An illustration of the formation of capsules about two sporoblasts of Cyclospora Cayetanensis.

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…

Modern Foraminiferal types - Globigerina.

Globigerina

Modern Foraminiferal types - Globigerina.

Gregarina is a parasitic protozoan. They live in the alimentary canal of crayfish, and certain insects.

Gregarina

Gregarina is a parasitic protozoan. They live in the alimentary canal of crayfish, and certain insects.

Gregarina is a parasitic protozoan. Stage 2 in the conjugation and spore forming.

Gregarina

Gregarina is a parasitic protozoan. Stage 2 in the conjugation and spore forming.

Gregarina is a parasitic protozoan. Stage 3 in the conjugation and spore forming.

Gregarina

Gregarina is a parasitic protozoan. Stage 3 in the conjugation and spore forming.

Infusoria is an obsolete collective term for minute aquatic creatures like ciliates, euglenoids, protozoa, and unicellular algae that exist in freshwater ponds. In modern formal classifications the microorganisms previously included in the Infusoria are mostly assigned to the Kingdom Protista.

Infusoria

Infusoria is an obsolete collective term for minute aquatic creatures like ciliates, euglenoids, protozoa,…

Modern Foraminiferal types - Orbulina.

Orbulina

Modern Foraminiferal types - Orbulina.

Paramecia (Slipper Animalcule), also known as Lady Slippers, due to their appearance, are a group of unicellular ciliate protozoa. Paramecia aurelia, a ciliate infusorian, (c) cilia; (c.v.) pulsating vacuoles; (f) food particles; (g) fullet; (m) buccal groove; (n) nucleus.

Paramecia

Paramecia (Slipper Animalcule), also known as Lady Slippers, due to their appearance, are a group of…

Modern Foraminiferal types - Polystomella

Polystomella

Modern Foraminiferal types - Polystomella

A modern Radiolarian, showing the skeletal structure of silica and the extended fleshy threads or pseudopodia.

Radiolarian

A modern Radiolarian, showing the skeletal structure of silica and the extended fleshy threads or pseudopodia.

<em>Heliosphaera echinoides</em>, a modern Radiolarian.

Radiolarian

Heliosphaera echinoides, a modern Radiolarian.

Modern Foraminiferal types - Rotalia

Rotalia

Modern Foraminiferal types - Rotalia

"A glace at a piece of common sponge will show that its surface is everywhere perforated with an infinite number of minute holes, among which a considerable number of large openings are scattered. When a sponge is examined in a living state, a rapid stream of water may be observed issuing constantly from these larger orifices." &mdash; Goodrich, 1859

Living sponge, magnified

"A glace at a piece of common sponge will show that its surface is everywhere perforated with an infinite…

An illustration of the liberation of Cyclospora Cayetanensis spores.

Liberation of Spores

An illustration of the liberation of Cyclospora Cayetanensis spores.

Vorticella is a protozoan. Except for when young, it is usually found attached to dead leaves or sticks throughout its life. This shows free-swimming individuals conjugating with a large, stalked individual.

Vorticella

Vorticella is a protozoan. Except for when young, it is usually found attached to dead leaves or sticks…

"Vorticella. 1. Structure. N., Macronucleus; n., micronucleus; c.v., contractile vacuole; m., mouth; f.v., food vacuole; v., vestibule. 2. Encysted individual. 3. Division. 4. Separation of a free-swimming unit--the result of a division. 5. Formation of eight minute units (mg.). 6. Conjugation of microzooid (mg.) with one normal size." -Thomson, 1916

Vorticella

"Vorticella. 1. Structure. N., Macronucleus; n., micronucleus; c.v., contractile vacuole; m., mouth;…

"A, Vorticella, a stalked ciliate Infusorian; I, contracted; 2, extended. f, food "vacuoles"; g, gullet; m, contractile fibre (muscular); n, nucleus; o, mouth, surrounded by ciliated disc; p.v., pulsating vacuole; s, stalk. B, a colonial type similar to Vorticella." -Galloway, 1915

Vorticella

"A, Vorticella, a stalked ciliate Infusorian; I, contracted; 2, extended. f, food "vacuoles"; g, gullet;…

"Vorticella. A, B, living specimens in different positions; C, optical section; D1, D2, diagrams illustrating coiling of stalk; E1, E2, two stages in binary fission; E3, free zooid; F1, F2, division into mega- and microzooids; G1, G2, conjugation; H1, multiple fission of encysted form; H2, H3, development of spores; ax. f, axial fibre; cort, cortex; cu, cuticle; c. vac, contractile vacuole; d, disc; gull, gullet; m, microzooid; mth, mouth; nu, meganucleus; per, peristome." -Parker, 1900

Vorticella

"Vorticella. A, B, living specimens in different positions; C, optical section; D1, D2, diagrams illustrating…

An illustration of the division of a zygote of Cyclospora Cayetanensis into two sporoblasts.

Division of Zygote

An illustration of the division of a zygote of Cyclospora Cayetanensis into two sporoblasts.