78 
C. H, MARTIN AND MURIEL ROBERTSON. 
We have been able to observe the transition between the 
active elongate form and the resting stage in life on a warm 
stage. 
It will be obvious from the account of the dividing resting 
form given above that it is possible in these cases for the 
animals to acquire new free flagella as stiff outgrowths from 
the blepharoplast, a method which, as we have already seen, 
is adopted by the dividing individuals in acquiring their two 
new free flagella. In addition to this process we have met with 
a number of remarkable swathed forms, which we are inclined 
to interpret as indicating a process of outgrowth of united 
flagella along the surface of the cytoplasm. Some of the 
successive stages, which we are inclined to explain on this 
hypothesis, 1 are shown in PL 14, figs. 67-71. 
It is only necessary now to refer to such forms as that 
figured in PL 14, fig. 72. Here, again, as in the analogous 
forms figured (Pl. 13, figs. 49-52) for Tri chomonas Eberthi, 
we possibly have to do with the process of conjugation coupled 
with a loss of the flagellar apparatus. But here, again, we 
have no definite evidence to offer in support of this view. 
8. EXPLANATION OF PLATES 10-14, 
Illustrating the paper by Mr. C. H. Martin and Miss 
Muriel Bobertson upon “ The Csecal Parasites of Fowls,” 
Part I. 
[The outlines of all figures were drawn with a camera under Zeiss 
comp. oc. 12 and 2 mm. apocliromat., with long tube at table level. 
For the study of the detail Zeiss’s 1*5 apocliromat. with their 
achromatic condenser Ap. 130 was used.] 
PLATE 10. 
Figs. 1-10. — Chilomastix gallinarum. 
Fig. 1. — Active Chilomastix gallinarum, showing four free 
flagella, blepharoplast, nucleus, pharynx and ingested bacteria. 
1 These stages might be regarded as stages in the absorption of the 
flagella ; but we have observed the loss of the flagella in the living form 
on more than one occasion without any indication of these appearances. 
