480 TRANSACTIONS OF THE CANADIAN INSTITUTE. [VoL. VI. 
SUMMARY. 
1. In Leggtatoa alba and B. mirabilis there is no differentiation of the 
cytoplasm, as Biitschli finds, into a central body and a peripheral layer 
The centrally placed portion of the cytoplasm contains, in the well- 
nourished fresh cell, a number of sulphur droplets, and frequently the 
cytoplasm between the droplets may be more condensed than at the 
periphery of the cell, but usually both portions stain equally deeply. 
2. The compounds of “ masked” iron and organic phosphorus are 
uniformly and equally diffused throughout the cytoplasm in the threads 
of BL. alba and in 4. mzrabilis, and the organic phosphorus is found uni- 
formly distributed in those cells which contain unshrunken cytoplasm. 
When granules which stain with hematoxylin occur, they are found to 
contain “masked ” iron and organic phosphorus. 
3. In the “spirilla,” in the “comma” forms and in the “cocci,” the cyto- 
plasm shows characters like the cytoplasm of the threads, but there are, 
in addition, granules which give slight reactions for “masked” iron 
and organic phosphorus, and which, therefore, are constituted of a sub- 
stance analogous to chromatin. 
4. There is, in all these forms, no specialized chromatin-holding struc- 
ture in the shape of a nucleus of any kind. 
Ss 
