33i 
After about an hour, agglutination of the free parasites was 
observed. They joined themselves together by their posterior, 
sharper, somewhat granular ends. Two, four, or six parasites came 
together in clumps in this way. Contractions occurred from side to 
side, causing the parasites to bend. Two days after the fresh 
preparations were made, the agglutinated groups of drepanidia were 
observed still, the individuals being rather granular and stumpy and 
actively motile, but they did not undergo any further change. 
Three forms of drepanidia were observed, a small form (Plate 
XXVIII, fig. 74) which will be described in stained preparations, a 
medium form (Plates XXVIII and XXIX, figs. 82, 68, 69) (the common 
form), and a very large form (Plate XXIX, fig. 86). These large 
drepanidia often contained large yellowish, highly refractile granules, 
which varied in si/.e and number in different parasites. There were 
from one to about one hundred of these globules in each parasite 
(Plate XXIX, figs. 84, 85, 89, 90. 91. 92). These highly refractile 
granules were situated for the most part around the nucleus. In some 
of these parasites small dancing granules were seen at the more 
slender end. 
Stained Specimens. 
The following description is based on the examination of dried 
and stained films. 
The nucleus of the host-cell was displaced (Plate XXVIII, fig. 59 ) 
but not injured ; the cytoplasm, however, suffers severely since the 
parasite seems literally to tunnel about within the limits of the cell. 
Many corpuscles were found in which the contents seemed to have 
been devoured, leaving them looking like wrinkled empty sacks 
(Plate XXVIII, fig. 67). Such sacks could be seen with the drepanidia 
present, or leaving, or gone. Two and three parasites were sometimes 
seen in one blood corpuscle. The drepanidia were not only present in 
erythrocytes but were also occasionally found in leucocytes. 
As already noted there were three principal forms of drepanidia ; 
a large form, a medium form, and a slender form. The medium form 
was the most common (Plate XXIX, figs. 81, 82), and was from 15 to 
18/1 long and from 5 to 6/1 wide. It had a fine granular striated 
protoplasm, which sometimes contained coarse red granules, and 
sometimes not. Some specimens had a few (four) granules at the 
anterior end of the body, and some had a straight blue line running 
