FURTHER OBSERVATIONS OX C2ECAL PARASITES OF FOWLS. 53 
Further Observations on the Csecal Parasites of 
Fowls, with Some Reference to the Rectal 
Fauna of other Vertebrates. 
PART I. 
By 
C. H. Alaifin. H.A., 
Demonstrator of Zoology at Glasgow University, 
And 
H 11 riel Robertson, 
Junior Assistant to the Professor of Protozoology in the 
LAnversity of London. 
With Plates 10-14 and 4 Text-figures. 
Table of Contents. 
page 
1. General Introduction . . .53 
2. The Caeca of Fowls . . . .60 
3. Methods . . . .61 
4. Chilomastix gallinaruin . . .63 
5. Trichomonas gallinarum . .66 
6. Trichomonas Eherthi .70 
7. Trichomastix gallinarum . .74 
8. Explanation of the Plates . . . .78 
1. General Introduction. 
During the last two years we have been engaged in some 
work on the caecal parasites of the fowl, and although we do 
not feel that our work is complete, we have decided to 
publish some of the results we have obtained. 
In recent years there seems to us to have been a tendency 
to regard the life-cycle of parasitic flagellates as a subject on 
VOL. 57, PART 1. NEW SERIES. 5 
