INFECTIOUS DISEASES AND MICROBES, ETC. 259 



Protozoa. Dysentery and tropical abscess of the 

 liver are due to Amcebce, 1 and in India a fatal dis- 

 ease (surra), which attacks horses, mules, and camels, 

 is caused by one of the Flagellata. 1 



1 See Dr. A. B. Griffiths' book, The Physiology of the Inverte- 

 brata (Reeve and Co.). 



