56 
C. H. MARTIN AND MURIEL ROBERTSON. 
parasites, we have obtained some really trustworthy data as 
to the course run by new infections of these forms. 
Text-fig. 3. 
Trichomonas Ebert lii, showing three free flagella, mem- 
brane flagellum, blepharoplast, cytostome, nucleus, chromatic 
blocks, chromatic line, and axostyle. 
Until, of course, the whole life cycles of these animals are 
known, the breaking up of the complex series of forms 
inhabiting the caeca of fowls into good species is a matter of 
great difficulty. However, it must be remembered that the 
