296 C. CLIFFORD DOBELL. 
According to Drzewiecki (’03) most remarkable nuclear 
phenomena occur in Monocystis. In the vegetative period 
of development the nucleus is said to undergo complete frag- 
mentation into chromidia. A new nucleus is then gradually 
Trxt-FiG. 13. 
Anchorina sagittata, a gregarine. The protoplasm is filled 
with ‘* chromatophile granules” (chromidia). (After Cecconi, 
05.) 
built up from new chromidia, which make their appearance in 
the cytoplasm—the first-formed chromidia disappearing (text- 
fig. 14). Drzewiecki (’07) has lately described a similar pheno- 
menon in Stomatophora, introducing new terms into his 
TExt-FIG. 14. 
Posterior end of a gregarine, Stomatophora coronata. The 
original nucleus (N.) has broken up, and a new nucleus (N’.) 
is in process of formation from chromidia in the cytoplasm (?). 
(After Drzewiecki, ’07.) 
description (‘‘nucleolids,’ ‘chromatogens,” etc.). His 
account is based entirely on the study of fixed and stained 
specimens—in the second paper, on the study of a single 
preparation stained by Heidenhain’s method! The results 
have been regarded with some scepticism already (e.g. by 
