436 



whole process could not be followed out. In some instances 4 fragments, 

 each with a single vesicular nucleus, were seen within a single compart- 

 ment or cyst: in another there were 7 smaller fragments, one of which 

 contained two nuclei and was apparently dividing (Figs. 3 and 4). In 

 these it would seem as if the whole body of the sporont had broken up 

 as a preliminary to spore-formation. In others again there were irregular 

 masses of protoplasm containing many nuclei (Fig. 5), or a single mass 

 of this nature, representing the original sporont (Fig. 6). In these 

 multinucleate forms the majority of the nuclei were generally solid in 

 appearance, but among them were often one or two vesicular nuclei, 

 possibly representing the rudiments of developing spores. 



The closely packed mass of cysts in this infection points undoubtedly 

 to. a stage of schizogony preceding that of sporulation. The possibility 

 that some of the forms just described (e. g. Figs. 3 and 4] were stages 

 in the former cycle cannot be excluded. A priori, however, it would 

 seem more probable that they belong to the process of spore-formation, 

 as the great majority of the parasites were at the end of this phase. 



2. Myxklium mackici, n. sp. 



The material in this instance was sent home from India by Capt. 

 J. Percival Mackie, I. M. S., and was obtained in the Bombay 



F\g. 7. 



10 



/f'/ 



\ 





Fig. 7. Mijxidium mackici (above) in contact with cells of a renal tubule. 



Bacteriological Laboratory. It consisted in three slides bearing mounted 

 sections of the kidney of the tortoise, Trioiiij.r gdngeticus. Mackie noted 

 the presence of paratites in the urinary tubules, and these were identified 

 by Woodcock as a species of myxidium. Mackie recorded in a note 



