FURTHER OBSERVATIONS ON CJ10AL PARASITES OF FOWLS. 55 
below, we feel that we are justified in publishing the results 
obtained for the following reasons : 
(1) Our preparations were always made from the wall of 
the cavity containing the parasite, and not simply from the 
content of the cavity. Owing, we believe, largely to this 
fact, we have not only obtained a far more complete series of 
Text-fig. 2. 
Trichomonas gall inarum, showing four free flagella, mem- 
brane flagellum, blepliaroplast, cytostome, nucleus, chromatic 
blocks, and chromatic line. 
division of the active forms that seems to have fallen to the 
lot of the earlier workers on similar forms, but we have also 
got an interesting series of new stages which must, we are 
convinced, play an important part in the final construction of 
the life-cycle of these forms. 
(2) Owing to the ease with which it is possible to obtain 
newly hatched chicks and keep them free from all animal 
