186 ZOOLOGY 



ness." This disease carries off more than fifty thousand natives yearly, 

 and many Europeans have succumbed to it. 



Classification of Protozoa 



The following are the principal classes of Protozoa, examples of which we have 

 seen or read about : 



Class I. Rhizopoda (Gk. = root footed). Having no fixed form, with pseudopodia. 

 Either naked as Amoeba or building limy (Foraminifera) or glasslike skeletons 

 (Radiolaria) . 



Class II. Infusoria {in infusions). Usually active ciliated Protozoa. Examples, 

 Paramaecium, Vorticella. 



Class III. Sporozoa (spore animals). Usually parasitic and non-active. Exam- 

 ple, Plasmodium malariee. 



Refehence Books 



for the pupil 



Davison, Practical Zoology, pp. 178-184. American Book Company. 

 Herrick, Text-book in General Zoology, Chaps. II, V. American Book Company. 

 Jordan, Kellogg, and Heath. Animal Studies, Chap. III. D. Appleton and Com- 

 pany. 



FOR THE TEACHER 



Dodge, General Zoology, pages 54-65. American Book Company. 



Calkins, G. N., The Protozoa. The Macmillan Company. 



Linville and Kelly, General Zoology, Chap. XXI. Ginn and Company. 



Parker. T. J., Lessons in Elementary Biology. The Macmillan Company. 



Sedgwick and Wilson, General Biology. H. Holt and Company, 



Wilson, E. B., The Cell in Developtnent and Inheritance. The Macmillan Company, 



