THE INTESTINAL PROTOZOA OF FROGS AND TOADS, O47 
Fig. 92.—An oocyst (undeveloped) from small intestine of frog. 
Fig. 93.—The same oocyst twenty hours later. It contains now 
four sporoblasts and a residuum. 
Fig, 94.—A single sporoblast, more highly enlarged. 
Fig 95.—The same, twenty-one hours later. 
Fig. 96.—The same—now becoming a spore—seven hours later. 
Fig. 97.—The same—now a fully formed spore—thirty-six hours 
later. Two sporozoites and a sporal residuum are seen inside the 
“ pseudo-navicella ”’-like spore. 
