THE LEUCOCYTOZOA 



257 



VI. Multiplication and Reproduction 



(a) Asexual Multiplication or Schizogony. — The multiplication 

 of Leucocytozoa by the asexual method, or schizogony, is fairly 

 well known. The parasites encyst in different tissues, where 

 nuclear fragmentation occurs, resulting in the production of a 

 number of small, daughter forms, known as merozoites. The 

 schizogony of L. cams (fig. 4, a) and L. musculi (fig. 4, c) takes 





-■*.".■ ■ v± 





Fig. 4. — Schizogony of Leucocytozoa. 



/, L. cants (after Christophers). Schizogony in bone marrow. Merozoites arranged at periphery of cyst 

 b L. »u,ns{Hepatozo6n perniciosum) (after .Miller). Schizogony in liver. .Merozoites at the poles of 

 the cyst. Much resuiual protoplasm, c, L. musc-uh (after Porter). Schizogony in bone marrow. 

 Merozoites in groups of two. 



place in the bone marrow, that of L. funambuli and L. leporis in 

 the lung, while the liver is the seat of multiplication of L. muris 

 (fig. 4, b). The encysted schizonts vary in size : those of L. canis 

 are very large, while those of L. funambuli are very small, and 

 are apt to be overlooked in the lung preparations. 



The schizonts, or sporulating cells, are oval, refractile bodies, 

 usually with a somewhat thick wall. The protoplasm of all 

 Leucocytozoon schizonts is evenly distributed at first, and eacn 



17 



