Trypanosome Diseases of Domestic Armmals in Uganda. 181 
Table I.— Trypanosoma nanum. 
In microns. 
No. of 2 Method of Method of 
expt Animal, fixin stainin 
a 8 g- Average Maximum Minimum 
length. length. length. 
503 Ox Osmic acid Giemsa UBIES) 15:0 11°0 
983 é . 13 ‘1 140 12-0 
698 Goat ‘ a 13 °9 16 ‘0 13-0 
698 F ie x 15 °2 16-0 12°0 
882 5 . ss 12°9 15:0 APE) 
883 ss ; 133 15:0 11°0 
1691 * :. . it 1337 16:0 12°0 
16:0 | 11°0 
13 °6 
The average length of 7. nanwm corresponds closely with that of 
T. pecorum, which was 13°3 microns. The question arises as to whether it 
would not be better for the sake of simplicity to include, for the present at 
least, this species in that of 7. pecorwm. If the morphology is the same, if 
the important domestic animals are susceptible to both, if the geographical 
distribution is the same, and if the carrier 1s found to be the same, there 
seems little need of separating the two under different names. 
Lreadth.— At the widest part from 1:5 to 2°5 microns. 
Shape.— Much the same as 7’. pecorum, but perhaps slightly narrower, due 
to the less development of the undulating membrane (Plate 14). 
Contents of Cell—aAs a rule homogeneous. 
Nucleus.—Oval and situated about the middle of the body. 
Micronucleus—Small and rounded, and situated near the posterior 
extremity. 
Undulating Membrane.—Perhaps a little narrower and simpler than in 
T. pecorum. It was thought to be applied more closely to the body and less 
thrown into folds than in that species. 
Flagellum.—there is no free flagellum. 
