Phyllophora Brodiæi and Actinococcus subcutaneus. 31 
one to two weeks numerous spores were set free, and the 
plants were then removed. The water in the vessels was 
now and then renewed and the slides cleaned with caution, 
diatoms, Cyanophyceæ and other Algæ being removed so 
far as possible. 
The spores newly set free are globular naked cells (fig. 
16 A) 7—9 x in diameter, mostly 7—8 w, containing a large 
SQ 
Sisson Où 
E 
Fig. 15. Germlings from tetraspores of Phyllophora Brodiwi sown in the 
beginning of December 1925. A—B, 3'/2 months old, °”/s 1926. C—F, 
6'/2 months old, *°/s 1926. G, 7 months old, */7 1926. E, optical vertical 
section. A, C—F, 350:1. B, 410:1. G, 560: 1. 
chromatophore, a hyaline, feebly refractive body, probably 
the nucleus, and a great number of small refractive grains. 
A month later (January 11th) numerous spores had sur- 
rounded themselves with a membrane and were divided 
by a vertical wall into two cells, more rarely into three. In 
most cases the bodies had not changed shape but were a 
little enlarged in circumference; only a few of them were 
