164 Practical Zoology. 



that at one place there is a bulging out of the ectosarc, some- 

 times forming a long projection called a pseudopod. The granu- 

 lar endosarc then flows into this projection, and by repetition of 

 this process the whole amoeba moves forward. Is there any 

 part that can be called the head ? Does it move constantly in 

 any one direction? Make sketches at intervals to show the 

 changes in form. 



5. Feeding. It may be discovered that occasionally an amoeba 

 ingulfs a particle with which it comes in contact. This is its 

 mode of eating, for it has no mouth. Does it show choice in 

 what it thus takes in ? Is there any refuse of digestion ? If so, 

 where and how does it leave the body ? 



6. Feeling. Does the amoeba ever appear to feel an object 

 against which it presses ? Does it avoid obstacles ? What evi- 

 dences as to its having a sense of touch ? 



7. Reproduction. Can you find an amoeba that is dividing 

 into two parts? This is its simple mode of reproducing, and is 

 called division or fission. If possible, find out how long it takes 

 to complete the division. Make sketches to show the process 

 of division. 



PARAMECIUM, THE SLIPPER ANIMALCULE. 



Paramecia are often found in water containing decaying ani- 

 mal or vegetable matter. If a white film forms on the sur- 

 face of such water, look through the sides of the jar, and there 

 may often be discovered tiny white particles moving actively 

 about. Mount a drop of this water, with a little of the scum, 

 and examine with a low power of the microscope, say a two- 

 thirds or one-fourth inch objective. Small oval or elliptical 

 bodies may be seen swimming around at a lively rate. These 

 are paramecia. Find one that is fenced in by surrounding 

 matter, or prepare another mount ; a few threads of cotton often 

 serve well as a "corral." With a higher power, one fifth or 

 one sixth, examine a paramecium, whose movements are thus 

 restricted. Note: 



