35° BOTANICAL GAZETTE [MAY 
vary, and the variation is accompanied by striking variations in 
the staining reactions, sometimes the end of the projection 
appearing as a dense, deeply staining knob in which scarcely any 
structure can be distinguished, and sometimes staining faintly 
and —- beautifully the cytoplasmic reticulum. In fact, the 
haustorium behaves like a gland cell, during 
the period of accumulation staining more and 
more deeply, then discharging, and during the 
following period of exhaustion staining faintly 
until the active period begins again. In jig. 7 
; the haustoria are discharging, the granules (g) 
coming undoubtedly from the haustoria. The 
appearance of the haustoria during the period 
of exhaustion following the discharge is shown 
in fig. 3,h 
That the contents of the jacket cells are 
strongly attracted toward the haustoria is easily 
Fic. 3.—Zamia Seen during the entire period of accumulation. 
foridana. Period of In figs. r, g, and 6 the protoplasm is anew 
exhaustion; 4, Baus streaming toward the 
toria; 4’, tangential 
sections of the swollen haustoria, and in Jig. coos 
endsof haustoria which is often the case, even the 
might be mistaken for 
nucleus appears to be 
' drawn out toward the 
cells; s,starch-contain- haustorium. During the 
ing cells outside jacket; period of exhaustion 
a walls of ( fg. 3) no such streaming 
of the protoplasm or dis- J oS 
tortion of the nuclei was observed. Fic. 4.—Zamia flort- 
In no case was there any indication of #4 eee 
the passage of nuclei or nucleoli from the asda much drawn out; 
jacket cells into the egg, and in no case did 4, peripheral portion of 
we find a jacket cell without a nucleus. egg; % jacket ¢ fer 
However, that material is probably drawn — aa sasceuueaed 
from the nuclei as well as from the cytoplasm ~ 
may be seen by comparing the nuclei of figs. 7 and 6 with those 
of fig. 3, the former showing the active condition and the latter 
the exhausted condition following the discharge. 
