596 



FAMILY: TRYPANOSOMID^ 



some, like T. rotatorium, is a parasite of the edible frog, Rana esculenta. 

 and lias been described under a variety of names owing to the fact that 

 the blood form changes considerably during the course of an infection. 



2 "^-^^^r,.^ 



9 



Fig. 241. 



,000). 



-TrypiDiosonia inopinatum OF the Frog (; 

 (After Franca, 1915.) 



1. Fully-grown form {T. undulans). 2-3. Forms of intermediate- size {T. clegam). 



4-G. Typical small forms {T. inopinatum). 7-10. Cultural forms. 



It was originally named T. inopinatum by its discoverers in Algiers, then 

 other stages were named T. undulans and T. elegans by Franga and Athias 

 (1906) in Portugal, and what is probably the same form in R. tigrina, 

 T.hendersoni by Patton (1908c) in India. Observations by Brumpt (1906c) 

 and Fran9a (1909, 19116, 1915), who followed the infection in frogs from 

 its beginning, conclusively demonstrated that all these forms are merely 

 stages of development of one and the same organism (Fig. 241). 



