1911. ] Trypanosoma gambiense 7 Glossina palpalis. 519 
Figs. 8—13 represent what we consider to be the normal reproductive or developing 
‘type found throughout the intestine during the whole period of development. It is to 
‘be noted that this form is longer and broader than the normal broad form ; the proto- 
plasm is clear, and stains readily and evenly, and this cell looks normal. The nucleus 
is compact and situated nearer the posterior extremity than the anterior. The 
micronucleus is small and round, lying at some distance from the elongated posterior 
extremity. Many dividing forms of this type can be seen. In our opinion, this is the 
common multiplying form, and from it arises an infinite variety of degenerating forms. 
x 2000. 
Fie. 14.—Part of a mass of 7'rypanosoma gambiense from the mid-gut. 
This figure is given in order to try to convey some idea of the enormous proliferation 
of trypanosomes which takes place in the intestine of Glossina palpalis. Throughout the 
whole length of the alimentary canal, from the proventriculus to the proctodeum, this 
condition is frequently seen, and in the living condition presents an extraordinary 
spectacle. Looked at through the wall of the intestine the matted masses are seen in 
active movement, swaying about and wriggling in every direction. They do not appear 
to be attached to the wall of the intestine, but move about freely, and when the 
intestinal wall is burst pour out in countless numbers. The trypanosomes evidently 
belong to the type figured in the preceding sketch, called the normal reproductive type. 
