Protoplasm in Coenocytic Hyphae . 497 
contents into a side branch, or when a rapid stream forces 
itself upon and merges into a slower one. I shall, however, 
content myself at this time by saying that these appearances 
are such as would be produced by a viscous fluid, holding 
Woodcut 9. 
Fig. 2. A long vacuole is pushing forward into dense protoplasm, followed by 
highly vacuolated protoplasm. 
Fig. 5. Hypha with axial stream of protoplasm, and a peripheral return current 
of non- vacuolated protoplasm. 
drops of a less viscous fluid, when forced through tubes of like 
construction to the mycelial filaments. When, for instance, 
the stream impinges squarely upon the angle of a wall 
