its construction is curiously adapted to its necessities. The body is enclosed in a bivalve, transparent shell, which, when examined by the microscope, appears like fine network. On each side of the head is a strong, transparent, jointed area, forked, and terminating in several branches; which enables it to move in any direction, by waving it as a bird does its wings.

The genus (miscue, popularly called Wood.. louse, contains but few species. They are found in houses, gardens, and under the bark of decayed trees. It is too well known to need a description of its figure. The Armadillo is sometimes used in medicine; and, when alarmed, has (lie faculty of rolling itself UI) into the form of a brown pea; the scales of its back sliding over one another, like those of the quadruped of the same name.

The Oniscus aquaticus is found in pools, small rivulets, especially springs, and sonictimes in the sea. llhey are good swimmers, and differ from those that inhabit the land, by bringing forth their young alive.

The foreign species of the genus Scolopendra,
or Centipede, are formidable insects, inflicting
a very painful wound. They infest many
parts of Asia, Africa, and South America;
and, as they often creep into houses, the in
habitants