96 Magnus. — Some Species of Genus Urophlyctis. 
Fig. 9. Apex of the host-cell ( u ) showing the vesicle from which originate 
the mycelial threads. One mycelial thread is shown attached to the cell-wall. 
Figs. 10-13. Conjugating cells. The male conjugating cells are modified 
from special mycelial threads with long internodes, which frequently branch out 
from the male cells. They conjugate with the female cells through narrow 
fertilization-channels. X390. 
Figs. 14-16. Urophlyctis pulposa (Wallr.), Schroet., on Chenopoditim. 
Fig. 14. Large parenchymatous cells of Chenopodium rubrum (Karlsbad, 
Bohemia) in which the parasite grows ; next to unchanged parenchymatous cells 
which remain small. The walls of the neighbouring infected cells are pierced 
in a sieve-like manner, and the mycelial threads may be seen passing through the 
pores from one cell to the other. At a a young parenchymatous cell is shown, 
into which, in the young state, the mycelial threads of Urophlyctis pulposa hav 
entered through the pores in the cell-wall. The cell is beginning to swell ; the 
mycelial threads have as yet formed no conjugating cells. X420. 
Figs. 15-16. Cells in which Urophlyctis pulposa has developed, showing the 
sieve-like perforated walls. x 207. 
Figs. 17-31. Urophlyctis leproides (Trab.) P. Magn., on Beta vulgaris , var. 
rapacea , from Rouiba in Algiers. 
Figs. 17-23. Transverse sections of the galls showing the cysts. 
Fig. 17 shows several cysts connected together by channels which arise from 
the cysts. The latter are shown also in Figs. 19-21. Figs. 22 and 23 exhibit the 
separate long connecting channels of the cysts of the galls. Fig. 18 shows these 
in part cut in transverse section. (Figs. 17-20, x 111 ; Figs. 18, 19, and 22, 
x 162 ; Figs. 21-23, x 420.) 
Figs. 24-32. Conjugating cells formed from mycelial threads. 
In Figs. 24, 28, and 29 are shown the threads which give rise only to male 
fertilizing cells with long intermediately segmented cells, which branch out from 
the fertilizing cells. Figs. 25-27 show the fertilization-channels. Figs. 29 and 33 
show at r the remains of the carrying threads of the female receptive cells. 
In Figs. 32 and 33 the male cells have become divided, x 420. 
