1 1 6 Bristol . — - Life-history and Cytology of Chlorochytrium grande. 
happens that a cell provided with one long projection may also possess one 
or more small conical papillae. In a few cases, one of which is shown in 
Text-fig. i. Zoogonidangia with variations in thickening of the wall, x 330. A, surface 
view of specimen showing lobes of chloroplast : B, do., showing depression in cytoplasm at a due to 
internal cellulose projection from the cell- wall ; C-H, various cases showing distribution of sculptur- 
ing ; 1 and j, sections showing internal thickenings of cell-wall. p. pectic layer ; c. cellulose layer. 
Text-fig. 1, 1, the whole internal surface is raised into projections of 
varying sizes. 
The unequal thickenings of the pectic layer of the wall produce 
