Clarke. — Natural JiC(/iou.9 in U'cstn-)) Australia 
129 
(b) Kivev forest — along- the river beds in (a). 
(e) Mangrove forest — along the coast line. 
(d) Northern scdero])hyl]ous woodlands — in the north-west eorner 
of (a). 
(e) Littoral forest — a narrow coastal stri]) particularly marked 
near the Prince Regent River. 
(f) Grasslands — ])lains of the Lennard, IMay, 
^leda, and Isdell rivers. 
(g) Pindan (low sclero])hylloiis woodland) characteristic of the 
south-west part f)f the Kimberley, east of Proome. 
Of these the River, .Mangrove, and Littoral forest cover small 
areas and can hardly be sai I to constitute' natural regions, but the 
savannah woodlands, northe n sclero])hyl!ons ayooi Mauds, grasslands, 
and ])indan should be useful guides. 
It is suggested that in the Kimberley tlie following regions may 
be recognised: — 
I. ‘). Fitzroy Frr/iou. This area is essentially coni])osed of 
Pevnuf-tMrboiiiferous rocks. However, a very large ])art is covered 
with a superficial layer of alluvial material brought down by the 
Pitzroy River and its tributaries. Thus the fertile flats bordering 
on the Pitzroy and lesser streams (Gardner’s “grasslands”) differ 
markedly from the sandier pindan country, which soiitliwards merges 
gradually into the samlridges of the Canning Region and northwards 
into tlie foothills of the Na])ier and other ranges. Ijike the Canning 
region, from which it is distinguished by its greatc'r rainfall, its 
eastern limit is unknown. 
In normal years there is sufficient surface water in the form of 
“billabongs,” etc., f(n- pastoral requirements. The region also has 
artesian Avater, being on the northern edge of the “Desert” basin 
(IVfaitland, 1019 c., flg- b), but its artesian supplies have Ixuni only 
slightly explored. 
This i-egion carries large cattle runs, but is also marked by the 
Department of the North-West as suited for tropical agriculture, and 
has for some years been systematically prospected for ])etroleum Avith 
ffiirly satisfactory resTilts. 
II. North Kimhcricy licgion. The greater part of this region, 
Avhich is vNidly described by Haston (1922), is occuifled by sandstones 
and l)asic igneous rocks, either later Pre-Cambrian or LoAA'er Cam- 
brian in age (Maitland, 1910 a.. Geological Map; Wade, 1924, p. 14 
and Geological Map)- There is, hoAVCAmr, a southern fringe of 
ancient crystalline rocks, in AA'hich in 1884 AV^as made the first im- 
