62 TlMEHRI. 
well embedded, winding with the line of the water ; 
and as we stepped from the boat, a female iguana was 
caught with its tail out of the ground, intent on burrow- 
ing to lay its eggs. Some tracks of acuri {Dasyprocta 
agati) were noticed in a few places in the forest. Besides 
a dozen or so of birds, mostly black Ibis, the only other 
animal seen was a small yawarri, [Didelphys philander?) 
I was afterwards told that game was to be had, but that 
it had become so shy from being much disturbed, that 
dogs were necessary to turn it up. 
During the last three or four days of our journey the 
Hevea was not met with, though I was informed that it 
extends very considerably higher along the banks of the 
river. But time would not permit further ascent. The 
Indians here too know it just as well as those lower 
down, and recognised my dried specimens. Their 
habits are however so migratory that this alone would 
be insufficient proof of its occupying the district 
As far as I could gather, it is spread from the mouth 
of the Essequibo, where it is common on the banks and 
in the creeks to points high up on the same river and 
on the Mazaruni. It probably also occupies the lower 
regions of the Cuyuni. On another occasion I found 
it far in the interior on the Potaro River. It was not 
seen by me on the Corentyne. Judging from my own ob- 
servation, and from the analogous case of H. brasilinsis, 
it appears chiefly to inhabit the alluvium along the shores 
of the rivers and creeks ; yet I was informed that it is 
not strictly confined to this kind of ground. 
From the falls we returned to Kalacoon, where we 
packed the plants, and the next day came back to 
