360 Willis.—The Sources and Distribution of the 
The tapering is especially shown in the last 400 miles at the northern end 
of New Zealand, where the endemics actually fall below the wides. When 
plotted into curves, as in Fig. 7, it is clear that these families exactly 
reverse the behaviour of the northern families just dealt with. 
Fig. 7. 
In Gramineae and one or two other families, there are quite a number 
of wides beginning at the North Cape and ending somewhere to the south, 
e. g. Paspalum scrobicnlatum ranges as far as East Cape, P. Digitaria as far 
