"A Skeleton of a young colony of <em>Tubipora purpurea</em>. st, stolon; p, platform. B, Diagrammatic longitudinal section of a corallite, showing two platforms, p, and simple and cup-shaped tabulae, t." &mdash;Encyclopedia Britannica, 1910

Colony of Tubipora Purpurea

"A Skeleton of a young colony of Tubipora purpurea. st, stolon; p, platform. B, Diagrammatic…

An illustration depicting the arrival of the Walloon settlers on Long Island.

Landing of the Walloons

An illustration depicting the arrival of the Walloon settlers on Long Island.

An illustration of a young George Washington trekking through the wilderness.

Washington's Journey

An illustration of a young George Washington trekking through the wilderness.

The nests of social (or republican) weaver birds, which live in colonies.

Nests of Sociable Weavers

The nests of social (or republican) weaver birds, which live in colonies.

"A, Zoanthid colony, showing the expanded zooids. B, Diagram showing the arrangement of mesenteries in a young Zoanthid. C, Diagram showing the arrangement of mesenteries in an adult Zoanthid. 1, 2, 3, 4, Edwardsian mesenteries." &mdash; The Encyclopedia Britannica, 1910

Zoanthid Colony

"A, Zoanthid colony, showing the expanded zooids. B, Diagram showing the arrangement of mesenteries…

"A. Mixed Zoogloea found as a pellicle on the surface of vegetable infusions &c; it consists of various forms, and contains cocci (a) and rodlets, in series (b and C), &c. B. Egg-shaped mass of zoogloea of <em>Beggiatoa roseo-persicina</em> (<em>Bacterium rubescens</em> of Lankester); the gelatinous swollen walls of the large crowded cocci are fused into a common gelatinous envelope. C. Reticulate zoogloea of the same. D, E, H. Colonies of <em>Myconostoc</em> enveloped in diffluent matrix. F. Branched fruticose zoogfoea of <em>Cladothrix</em>. G. Zoogloea of <em>Bacterium merismopediodes</em>, Zopf, containing cocci arranged in tablets." &mdash; Encyclopediia Britannica, 1910

Types of Zoogloea

"A. Mixed Zoogloea found as a pellicle on the surface of vegetable infusions &c; it consists of various…