ONE-CELLED ANIMALS— PHYLUM PROTOZOA 107 



Class B. Mastigophora (Gr. mastix, whip; refers to the flagellum; and 

 phera, bear). 

 Genus 1. Euglena (Gr. eu, good; glene, pupil of the eye; refers 

 to the fact that this animal has a small eyespot near the point 

 where the flagellum joins the body), 

 species a. viridis (L. viridis, green). 

 Genus 2. Trypanosoma (Gr. trypanon, auger; soma, body; refers 

 to the auger-like body that these animals possess), 

 species a. gambiense {Gambia, a political subdivision of Africa 



where this species is found), 

 species b. brucei (named in honor of James Bruce, Scottish 

 traveler and scientist, who showed that sleeping sickness of 

 domestic animals in Africa was caused by this species). 

 Genus 3. Leishmania (Sir Wm. Leishman, a British surgeon), 

 species a. donovani (Edward Donovan, English pharmacist). 

 Genus 4. Trichomonas (Gr. tricJw, hair; and L. monas, a unit), 

 species a. vaginalis (L. vagina, a sheath; refers to human 

 vagina). 

 Genus 5. Giardia (Alfred Giard, French biologist). 



species a. lamblia (William Lambl, a Bohemian physician). 

 Class C. Ciliata (L. cilium, eyelid; the cilia on some forms resemble 

 the hairs on the eyelid). 

 Genus 1. Paramecium (Gr. paramekes, oblong; refers to body 

 shape of this genus), 

 species a. caudatum (L. caudata, having a tail; refers to the 

 pointed posterior). 

 Class D. Sporozoa (Gr. spora, seed; soon, animal; spore-producing 

 animals). 

 Genus 1. Plasmodium (Gr. plasma, formed or moulded; has come 

 to refer to the viscous material of a cell ; eidos, like ; applied 

 to organisms that change their form during their life cycle), 

 species a. vivax (L. vivax, long lived or vivacious ; refers to the 

 long life and vigor of these animals in the human body). 



REVIEW QUESTIONS 



1. What is the distinguishing characteristic of the class Sarcodina? 



2. Describe locomotion in the amoeba. 



3. Can you reason out any advantages of amoeboid movement among the white 

 blood cells of the human body? 



4. Describe the method of digestion in the amoeba. 



5. List the products that enter and leave the amoeba through diffusion. 



6. What is the function of the contractile vacuole? 



7. The amoeba grows most rapidly at a temperature of about 68 degrees. 

 Would you expect reproduction to be most rapid at this temperature also? Explain. 



