What lie does Jack tell the others at the assembly in Lord of the Flies?

In Chapter Seven of William Golding's Lord of
the Flies, Jack and Ralph continue up the mountain with Roger lagging
behind.  Crawling along, they see the beast, "A creature that bulged."  It was "sitting
asleep with its head between it knees."  But, when the wind blows, the creature seems to
lift its head, "holding toward them the ruin of a face." The three boys flee in
terror.

When they return to where Piggy and the others are,
Ralph assures Piggy that they have seen the beast with "teeth...and big black eyes."  He
continues saying that they will not fight it as the creature is too big.  But, it is
near where the fire was as though preventing them from being rescued.  Again Jack and
Ralph vie for the leadership as Ralph takes the conch from Jack and Jack interrupts
him:

I've
called an assembly...because of a lot of things.  First, you know now, we've seen the
beast.  We crawled up.  We were only a few feet away.  The beast sat up and looked at
us.  I don't know what it does. We don't even know what it
is.

Then, after some of the
boys say things like "The beast comes out of the sea--" and "Out of the dar," Jack lies
by declaring, "The beast is a hunter," when he has just said that he does not know what
the beast does.