The-Outline-of-Science-Vol.-1

PROTECTIVE RESEMBLANCE BETWEEN A SMALL SPIDER (to the left) AND AN ANT (to the right)

As ants are much dreaded, it is probably profitable to the spider to be like an ant. It will be noted that the spider has four pairs of legs and no feelers, whereas the ant has three pairs of legs and a pair of feelers.

The Outline of Science, Vol. 1 (of 4) A Plain Story Simply Told

J. Arthur Thomson, 1922 (Source: gutenberg.org)

AN INTRICATE COLONY OF OPEN-SEA ANIMALS (Physophora Hydrostatica) RELATED TO THE PORTUGUESE MAN-OF-WAR

There is great division of labor in the colony. At the top are floating and swimming “persons”; the long ones below are offensive “persons” bearing batteries of stinging cells; in the middle zone there are nutritive, reproductive, and other “persons.” The color of the colony is a fine translucent blue. Swimmers and bathers are often badly stung by this strange animal and its relatives.