PHYSIOLOGICAL ACTIVITIES OF THE PROTOZOA 



95 



This so-called endogenous budding is perhaps the forerunner of the 

 curious method of spore formation, or, better, budding, which occurs 

 in one group of the sporozoa, the neosporidia. Here the individual 

 continues to live while forming buds, as in acineta, within its proto- 

 plasm. Such buds, known as pansporoblasts, then form peculiar 

 thread-bearing spores, the entire substance of the bud being used in 



Fig. 33 



Ephelota butschliana, a budding inilividual witli five daughter buds. .V, niaoronucleus, wliicli 

 forms a hrancliiiiff organ connectetl througiiout. (.\fter Callvins.) 



tiie formation of the spores, and the.se small bundles of spores are 

 carried about by the grandmother organism until its protoplasm is 

 loaded with them, and until it appears like a huge cyst filled with 

 spores (see Fig. i\\, p. 14.')). These organisms are frecjuent parasites 

 on fish, where they may l)e the cause of costly epidemics. 



Budding, furthermore, is fre(|uently a.ssociated with tiie process of 

 conjugation; the mother cell, loaded with chromatin granules in the 



