122 
ANIMAL ACTIVITIES. 
One of the Infusoria found in infusions of vegetable 
matter is the Paramecium , or slipper-animalcule (Fig. 
107). This may be found and stud¬ 
ied very easily. Where a compound 
microscope is available the follow¬ 
ing exercise may be used. 
Laboratory Exercise. Examine 
in a watch-glass by using a low 
power of the microscope a few 
drops of stagnant water known to 
contain Infusoria. 
1. Does the Paramecium have a 
definite shape ? Is it bilateral ? Is 
the Amoeba bilateral ? 
2. Place a few drops of water 
containing the slipper-animalcule 
on a slide with a few fibres of cot¬ 
ton and examine with a higher 
power of the microscope. Is the 
body divided into parts or cells ? 
3. Do you see the movement of 
cilia ? On what part of the body 
are they situated ? 
4. Do you find a groove sur¬ 
rounded by cilia ? 
a mouth ? 
a nucleus ? 
Are there any contractile vacuoles ? 
Feed the animal with bits of indigo, 
the blue particles go ? 
Summary of Drawings. ( a ) A sketch of several 
animals as they appear when viewed with a low power 
of the microscope. 
( b ) Sketch of a single animal showing as many parts 
as you have seen. 
In the Paramecium the activities of life are carried 
on much as they are in the Amoeba. There is, how¬ 
ever, a greater specialization of parts, especially the 
Fig. 106.— Vorticella 
( magnified ). A , ex¬ 
tended ; 3, contract¬ 
ed; C, in fission. 
Do you find 
Do you find 
Where do 
