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 matter leave the body at any particular place? Trace movement of the food particles.

Draw the paramecium.

Which has more permanent parts, the ameba or paramecium? Name two anatomical similarities and three differences; four functional similarities and three differences.

The ameba belongs in the class of protozoans called Rhizopoda "root footed."

Other classes of Protozoans are the Infusorians, which have many waving cilia (Fig. 17) or one whip-like flagellum (Fig. 18), and the Foraminifers which possess a calcareous shell pierced with holes. Much chalky limestone has been formed of their shells. These and the radiolarians, which have flinty shells (Fig. 19), are often placed in the class rhizopoda. To which class does the paramecium belong?

Protozoans furnish a large amount of food to the higher animals.

To the Teacher. If plant, animal, and human biology are to be given in one year as planned, and full time allowed for practical work, the portions of the text in small type, as Chapter III, may be omitted or merely read and discussed. Any two of the three parts forming the course may be used for a year's course by using all of the text and spending more time on practical and field work.