120 
more marked than between it and the 'long' form. These latta, 
that is to say, a trypanosome possessing a flagellum of more than i 
few fi in lengtli, were not seen in cattle, and were only found m 
inoculated guinea-pigs and rats. In these animals they mwsured 
from 25 to 31/i in length, and could, on the whole, be clearly separated 
into the two arbitrary classes, * male ' and ' female,' the former being 
thinner, staining more homogeneously pink, the nucleus elongated, 
and the protoplasm free from granules ; the latter stouter throughout 
the whole length, the nucleus oval, and the protoplasm taking a bhf 
tint and often containing granules. The flagellum measured froi 
5 to iifi, and continued from an undulating membrane which was not 
always so evident as in the larger of the ‘stumpy’ forms Tit 
blepharoplast is fairly prominent, rounded or oval, and com^ 
situated some little distance from the posterior extremity. whichW 
assumes most frequently a rather finely tapering point. Theme 
of these forms varied between 1-5 and dividing forms beings 
muc as 3 5/i across. Wiiile we refrain from the use of the expressKf. 
ree nagcllum,’ there appears little doubt that in the bigeroftk 
ong ^ orms, such a structure, free of cytoplasm, does exist. In the 
g" stumpy and the short ‘ long,’ which cannot be cicarl)' 
separate . the cytoplasm is unquestionably continued for a certain 
istance anterior to what we would regard as the normal extremit}' 
flacTp]! ° w^here body, undulating membrane and 
which fV impossible to determine thepoin'at 
which this prolongation ceases. 
local anW pr'eparations the corpuscular displacement a 
mLrescon. tP pass out of the field of* 
amonest the naturally, less coramo# 
bod°rand th readily retarded by tit* 
different from P displacement they produce is marktiS;' 
noted to nrodne. ^ I corpuscles. Neither form was e^tr 
containing T. vivax^ ' catherine-wheel ’ effect seen m blood 
the visit of NovcmK^° niake permanent slides from our donkev durii^ 
-aminele shde?he h?' 'a' 
naturally-infected do U previous to the death of a 
y ntected donkey at Ruwe, ,n the Congo to the North of thr 
