CELLS AND THE ORGANISM § 41 
branched above, and the branchlets are 
Fig. 5.—Hydrurus fetidus. I.—General character of the 
plant. I1.—One of the tips of the branches highly magni- 
fied showing the cells of which the plant is built up. The 
protoplasmic bodies are embedded in a common jelly 
formed by the swelling up of the walls or membranes, but 
the innermost layer forms a sharply defined skin round 
each protoplast. 
“hairy” or villous. The lower part forms 
