BY T. H. JOHNSTON AND J. B. CLELAND. 485 



wards the other end, and then bending around sharply to 

 form a narrowed tail bent in upon the body. The surround- 

 ing capsule was easily recognisable in some forms. The 

 affected red cells were slightly distorted, and their nuclei 

 pushed to one side and elongated. The longest parasite was 

 20-5 /i X .i-o to 1-7//.. The length varied from 13-20-5 /x, 

 the breadth in the widest portion of the organisms being 

 about 4 /x. The staining of the body was a more or less deep 

 blue, and, by Giemsa's stain, the chromatin presented dif- 

 ferent appearances in different specimens. In one, for 

 instance, the body, as far as the bend, was occupied by broad, 

 reticulated, chromatiu-like bands surrounded at the peri- 

 pliery of tlie animal by the blue protoplasm. In another speci- 

 men, the chromatin staining appeared as masses of purplish 

 granules on a deep blue base, one mass occupying the broad 

 end, another in the centre, and a few granules the bend. 



In addition to these adult stages of the parasite, numerous 

 early forms were seen, which were more or less spherical, 

 and varied in size from 4-7x4'5/x. These bodies occupied 

 various positions in the host-cell, sometimes being between 

 the nucleus and the side of the cell, sometimes jvist at or 

 beyond one end of the host-nucleus, sometimes right on one 

 end of the host-cell and pushing the nucleus to the other end. 

 In one cell, two of these bodies were seen, spherical in shape, 

 of about 35 /i diameter, and occupying positions at opposite 

 ends of the host-nucleus. In the earlier stages, these bodies 

 may appear as a deep purple ring, with a clear centre, con- 

 taining some minute purple specks, or they may be evenly 

 stained (a deep blue), or they may appear as a deep blue, 

 peripheral, thick ring with a pale blue interior containing 

 minute purple specks. In one film, a number of free, slightly 

 curved forms were detected. These were 9 ji. in length, and 

 about 2 jj. in l)teadtli, possessing a blunt anterior end, the 

 body generally tapering posteriorly for a little distance, and 

 then becoming rapidly narrowed to end in a thin tail. 



