319 
The body measures iSp by 13/z, and the free flagellum was 45/x long 
The blepharoplast is of the usual structure with the usual clear space 
about it, and from it extends the nucleus as a band rip wide and gp 
long. 
In Plate XXVI, fig. 14, is shown a round form with the flagellum 
cast of. The cytoplasm is coarsely granular and the blepharoplast 
which is of the usual structure is situated near the edge of the body. 
The nucleus adjoins the blepharoplast on one side. The diameter 
of the organism is 22 p. The nucleus is about 3*3/^ in diameter. 
A division, probably the first of a round form, is seen in Plate 
XXVI. fig. 15. The dividing parasite measures 19 p by 13/x. A group of 
16 parasites is shown in Plate XXVI, fig. 18; each of these cells 
measures about y$p in diameter. Other small parasites, probably 
representing parasites of a third division (Plate XXVI, figs. 16 and 17), 
have a diameter from 4*4/* to 6 ' 6 p. Plate XXVI, fig. 15, is a division 
of forms with two blepharoplasts and two nuclei. Such parasites were 
frequently seen. Occasionally round cells are found with multiple 
nuclei and blepharoplasts, but with the cytoplasm undivided 
(Plate XXVI, fig. 19). Such cells were from 11 to 22// in diameter. 
The small round cell now develops a flagellum from the 
blepharoplast, and the body elongates in one axis (Plate XXVI, 
fig. 20). This parasite measures 6 6/x by 5'5/U., and has a free flagellum 
22'8/i long. The blepharoplast is 0‘8 by 0*3 P, and is Vip from the 
edge. The nucleus is rip, by r6 p. 
The next stage in the development is the formation of herpeto- 
monas-like forms (Plate XXVI. fig. 21). These have a body length of 
from 9/x to 22p, divided as followsPosterior granule (see below) 
to posterior extremity o’^p to 4’4 /a, posterior granule to nucleus 4 2 
to io/i, length of nucleus 2 to 4’4/x, nucleus to blepharoplast (when 
blepharoplast is anterior) V 2 p, length of blepharoplast o 5 to o S/a, 
blepharoplast to the anterior extremity 2*2//. to 5*5/*. The flagellum 
is from iop to 25 p. The width of the body is i'2p. 
The body is narrow, tapering at both ends to a fine point. 
There is no undulating membrane (Bouet 6 describes one as being 
present). There are from 4 to 16 vacuoles lying between the 
posterior granule and the blepharoplast. The blepharoplast of the 
usual granular type lies either at one side of the nucleus or slightly 
anterior to it. From it the flagellum arises and runs through the 
