Chapter VII: APTEROUS Have no wings, as the spiders

13. The sixth and last class of animals consists of WORMS, or vermes. These are slow of motion, and have soft and fleshy bodies. Some of them have hard internal parts, and others have crustaceous coverings. In some of the species eyes and ears are very perceptible, whilst others appear to enjoy only the senses of taste and touch. Many have no distinct head, and most of them are destitute of feet. They are, in general, so tenacious of life, that parts which have been destroyed will be re-produced: These animals are principally distinguished from those of the other classes by having tentacula, or feelers.

14. Some late writers have divided the worms into three or more distinct classes; but the Linnæan division is into five ORDERS.

ORDERS OF VERMES, OR WORMS.