168 



JULIAN S. HUXLEY. 



threads, and larger, chromatic granules here and there. It 

 always looks denser than in the unencysted forms. 



The nuclei in what I take to be the earlier cysts are much 

 like those described for the second trophic phase, except that 

 they stain a little deeper, and that tiie nucleoli do not pro- 

 ject so far out from the surface (text-fig. 5). In the next 



Text-fig. 5. 



A cyst found in the gut. The nuclei are not actually touching, 

 but very near to each other. The cyst-wall is very thick in 

 this specimen. 



stage (fig. 16) the nuclei, bounded only by a very thin mem- 

 brane, stain quite deeply, as they are almost filled with 

 chromatic granules of various sizes. The nucleolus is still 

 in contact with the cytoplasm, but its outer surface is now 

 flush with that of the nucleus. This outer border of the 

 nucleolus is made up of rows of minute vacuoles, while the 



