SOME OBSERVATIONS ON ACINETARIA. 381 
showed any trace of budding. Suspecting the presence of a 
parasite, I placed some of the infected forms in a deep watch- 
glass, and I was able to follow all the stages in the life cycle 
of the parasite in the living form. 
Trxt-FIGURE 10.—Scheme of life-history of Tachyblaston 
ephelotensis. (Zeiss 4 mm. apochr., comp. oc. 4.) A. Internal 
parasitic form. B. Ciliated bud. C. Recently fixed ciliated bud. 
D. Later stage of fixed bud showing stalk. EK. So-called “ Acine- 
topsis’’ stage. F. Two free tentacled buds creeping up the stalk 
of the Ephelota. 
In order to avoid recapitulation, a diagram of the life cycle 
of the parasite is shown in text-fig. 10. The internal parasite 
gives rise by division to ciliated spores. These, after a short 
