Defining if an NPC killed is a certain NPC?

[MGCLegend]

I am trying to check whether the player kills a certain npc

I am not sure where to start besides something like this:

function KillCheck( victim, inflictor, attacker )
    if ( attacker:Quest() == "Slay a wild beast" && victim != attacker ) then
       QuestComplete(attacker, 1)
    end
	if( attacker:Quest() == "Slay a mythical beast" && victim == "npc_carnophage")then
		QuestComplete(attacker, 3)
	end
end
hook.Add("OnNPCKilled","KillCounter", KillCheck)

The line in question:

if( attacker:Quest() == "Slay a mythical beast" && victim == "npc_carnophage")then

Is there a way to check the victim's ent class instead of this? Because I'm sure this doesn't work.

Thanks in advance and sorry for my frequent most likely stupid posts...

*Cough* Found it myself....sorry.