244 



INTRODUCTION TO GENERAL SCIENCE 



Fungi. 



Fungi and their Mode of Life. 



Ferns, Mosses, Liverworts, Lichens, Algae, 



Mushrooms. 

 The Mushroom. 

 Fungi. 



Lichens, Liverworts, and Mosses. 

 The Relation of Fungi to Other Plants. 



177. PROTOZOA AND AMCEB^B 



The protozoa are the smallest of the microscopic animals, 

 and the best known of them are the amcebce. These are 

 about one one-hundredth of an inch in diameter and consist, 

 like other protozoa, of a single cell composed of protoplasm. 



The amoebae move from place to place by means of flow- 

 ing and contracting. They feed by absorption ; that is, they 

 surround their food, and leave the undesired particles as they 

 move on. Water is also absorbed in the same way. Thus 

 the amcebse grow by the accumulation of food. 



Reproduction is effected by the central part, or nucleus, 

 dividing into two separate parts; the whole animal then 

 elongates and separates between the two nuclei. Then there 

 are two amoebae. 

 References : 



1. 1407:158-159. 



2. 1501:10-11. 



3. 1503:179-186. 



a. 1504:1-22. , 



6. 1504:305. 



c. 1505:10-16. 



d. 1508:116-119. 

 c. 1509:4-9. 



/. 1510:9-11. 



g. 1512:286-306. 



The Amoeba. 

 The Amoeba. 

 Protozoa. 

 Amoeba. 



A List of Protozoa. 

 Protozoa One-celled Animals. 

 Activities of One-celled Animals. 

 A Simple Type of Animal. 

 Irritability, Assimilation, and Reproduc- 

 tion in Amoeba. 

 Protozoa. 



