562 ON THE TUBERCULAR SWELLINGS ON THE ROOTS OE VICIA FABA. 
infecting hypha clearly arises from a brilliant point, around which the growth 
of the cell-wall of the root-hair is affected, causing distortions. L '4. 
Fig. 14. Hypha passing through the cell-wall, showing the curious trumpet-shaped 
widening where the passage is effected. L/2. 
Figs. 15, 16, and 17. Ultimate branches of the hyphse in the cells of the tubercle, at 
the commencement of the budding process. The curious Y and V-shaped 
gemmules are well seen in fig. 17. The haustorium-like branches in 
figs. 15 and 16 are very like the incipient spores of an ZJstilago {e.g., de 
Bary, fig. 82, p. 189), but they do not become spores, and in many cases 
seem to give off the gemmules. (J/4.) 
Fig. 18. Part of a section of a last year’s tubercle—very thin, and treated with dilute 
ammonia—showing that the remains of the mycelium are still there, 
though obscured by the dense aggregation of gemmules. (E/4.) 
