164 MR. G. F. BENNETT ON ORNITHORHYNCBUS. _ [Mar. 6, 
the burrow for another 4 feet, I came to another chamber on the right- 
hand side, which was 9 inches wide, 15 long, and 5 inches high; the 
burrow still continued for 2 feet more, when the final chamber 
was reached. This had an entrance about 10 inches wide; the 
chamber measured 17 inches long, 10 inches wide, and 6 inches high ; 
but there was no sign of any nest in it, nor any thing to indicate that 
it had been inhabited for that purpose at any time, although the 
surface of the top appeared to be smooth and hard, as if the animal 
Fig. 2. 





























































































































































































































Sketch of burrow of Ornithorhynchus, laid open November 19th. 
had been rubbing upon it. I then found and opened another burrow, 
which showed indications of being inhabited. The size of the entrance 
was 23 to 4 inches, and ran very circuitously. I then excavated 
this burrow to about 20 feet (having passed a small unfinished chamber 
on the left about 4 feet from the entrance,-which is shown in the 
sketch, fig. 2; at every foot the burrow was rising up the bank), 
when I came upon a chamber on the right-hand side measuring 8 
inches high, 10 inches wide, and 16 incheslong. I then dug on for 
about 2 feet mere, when I came upon another chamber on the right- 

