MICROSPORIDIA — PARASITIC IN MOSQUITOES 



159 



peripheral region of the host cell where the spore formation has 

 not yet taken place. The nucleus, in most cases, stains deeply 

 without showing any particular details, but appears as a compact 

 rounded mass (figs. 1, 2). The schizonts grow at the expense 

 of the reserve material of the host cell. 



The schizont multiples by either binary fission or multiple divi- 

 sion. The nucleus assumes an irregularly coiled thread form 

 (fig. 3), divides into two (figs. 5, 6), and completes the division 

 (figs. 7, 8, 9). The body elongates and divides into two, each 

 containing a single nucleus (figs. 8, 9), Frequently the further 

 division of the two daughter nuclei takes place without being 

 accompanied by the separation of the protoplasm. There are 

 thus formed tetranucleate or octonucleate schizonts (figs. 11, 

 14), which give rise to four or eight uninucleate daughter schiz- 



JOURNAL OF MORPHOLOGY, VOL. 35, NO. 1 



