With those back ridges it looks like a cross between a blue tongue and a dragon!
Could be a Burn's dragon (
http://reptilesofaustralia.com/lizar....WCE74DJh1E4): the image is of a mature male, and it says the female and immatures are very different- but similar head shape and scales.
Or a Nobbi dragon:
http://reptilesofaustralia.com/lizar...m#.WCE8qDJh1E4
- Dean
PS: my post crossed with Nath2099's: my new vote is for the Cunningham's skink.