c. A. BARBER. ao 
developed. It is divided into an upper, broader part with 
distinct lumen and a lower, narrow portion, while the tissues 
between it and the host’s root are traversed by a distinct duct. 
Cork 1s much commoner in Cansjera haustoria and lenti- 
cels are irequent. A laver of tissue below the epidermis or 
cork remains smaller ceiled and has peculiar contents which 
persist in the form of drops. Such a hypodermai tissue 1s 
absent from Santalum. Sclerotic pitted cells are found in the 
cortex. In piace of the calcium oxalate crystals found in 
Santalum there are similar crystals of calcium carbonate. 
The cortical folds soon cease to grow round the root of 
the host and become thickened instead. They are thus usually 
short and thick, and do not envelope much of the host’s cir- 
cumference. In advanced stages the folds are small and func- 
tionless. The folds in Santalum continue to grow round the 
root attacked for a considerable time and distance, and there 
is no secondary growth in thickness. In Cansjera a small group 
of cells in the end of the fold become thick-walled, pitted and 
lignified: there is nothing of the kind in Santalum. The col- 
lapsed layers terminate upwards more or less as in Santalum, 
but, downwards, they end at a point half-way between the 
edge of the fold and the side of the sucker. Taking into con- 
sideration the shortness of the folds, the result of this is that 
the collapsed layers are much more erect and frequently ver- 
tical. With secondary thickening they soon become vertical, 
if not so before, then converge downwards and finally lie 
almost in one line pointing towards each other. There is a 
similar movement in Santalum, but, even in the extreme case 
figured in Sant. I, Plate IX, the collapsed layers are far from 
this position. These layers in old Cansjyera haustoria dwindle 
into insignificance. 
The inner cortex is separated in Cansjera into two more 
or less distinct parts at the time of penetration: an upper and 
outer where the cells become filled with starch and remain 
equal-sided, and an inner and lower where the cells are proto- 
plasmic, become elongated and take part in the formation of 
