Fig. 
Fig. 
Fig. 
Fig. 
Fig, 
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PuateE VII. 
One side of the vascular loop in a haustorium attached to a root of 
Alangium Lamarckii. This shows one of the bundles in the 
transitional region with its endodermis (e), the interrupted 
zone (i.z.) and the vascular loop below it, the upper ending 
of the collapsed layer (c./.) and the upper part of the disinte- 
erated nucleus (n°. 
Part of the same further magnified. The bast is shown under the 
endodermis (e) and contains the callus-plate of a sieve tube 
(s.t.), The isolated rows of vessels in the interrupted zone have 
lost their markings excepting a few in the outermost vessels, 
and have become filled with a yellow gummy mass. Their 
downward branching into white-walled, pitted vessels is well 
seen, as well as the thin-walled parenchyma between them. 
Part of the interrupted zone in a haustorium fixed on a root of 
Capparis horrida. Here the disintegration of the vessels has 
proceeded centrifugally and only the outer ones retain any 
of their markings. The vessels in the outer, latest formed 
row (0) retain their white walls and are indistinguishable from 
those of the main axis. All the rest are yellow. 
One of the caps of clear yellow substance shown at the end of the } 
host’s cortical wings (as at xin fig. 2 of Plate V) further 
magnified. It is evident that this clear yellow substance is 
made up of broken-down cells of the haustorium, apparently 
compressed by the host’s bark (6) below. 
A portion of the haustorium shown in fig. 7 of Plate VI, further 
magnified. Note the cork, hypoderm (hk) and the lignified, 
pitted cells below it. 
