H 



FIG. 12.7. Various forms of multiplication in Trypanosoma lewisi from the blood 

 of the rat. A, Trypanosome of the ordinary type ; B, small form resulting 

 from division ; C, stage in equal binary fission ; the nuclei have divided and 

 two flagella arc present, but division of the body is beginning, and is indicated 

 by a lighter streak down the middle of the body ; I), final stage of binary 

 fission, which is complete except for a bridge of protoplasm, much drawu 

 out, connecting the hinder ends of the two sister-trypanosomes ; E, form 

 with hinder end drawn out (longocaudense type), the result of binary fission 

 as seen in the last figure ; F, unequal binary fission of a large trypanosome ; 

 O, H, continued fission of the same type ; in G a parent and three daughter- 

 individuals, in H a parent and seven daughter-individuals, can be distin- 

 guished ; the parent-individual in each case is marked by the possession of 

 a flagellum of the full normal length, while the daughter-individuals, formed 

 by successive divisions, have flagella varying in length ; /, a small form, 

 similar to B, but with the kinetonucleus in front of the trophonucleus ; J, 

 binary fission of a form similar to / ; K, further division of a similar form 

 producing a rosette of seven individuals still connected together. From 

 preparations made by Dr. J. D. Thomson ; magnified 2,000 diameters. 



