I finally got around to having a look at these. I agree with Geckphotographer but attempted to go a little further…
1. Major Skink (Bellatorias frerei)
2. Bar-sided Forest Skink (Eulamprus tenuis)
3. Murray's Skink (Eulamprus murrayi)
4. Rose's Shade Skink (Saproscincus rosei)
5. Yellow-bellied Water Skink (Eulamprus heatwolei)
6. Eastern Water Skink (Eulamprus quoyii)
Photo 2: There were three possibilities based on distribution. E. quoyii ruled out due to upper margin of dark dorsolateral stripe, leaving E. martini and E. tenuis. The lizard in the photo lacks heavy labial barring and dark chin and throat marking. The dark dorsolateral band is continuous anteriorly only and then breaks up into columns. These do not continue onto the base of the base of the tail. All of which you expect in E.martini. The dead give away is the lower laterals on the body beneath the dark stripe/blocks. In E martini this is grey with white and black spotting. In E. tenuis, the area is pale grey with a light reticulum of black overlaid, sometimes giving the of pale spotting or flecking.
Photo 4: I eliminated S. challengeri on the same basis. The choice of S. rosei over S. spectabilis was based on the dorsolateral markings. The skink shown has a continuous narrow dorsolateral line from the nape backwards, which becomes broader and reddish brown over the hips and onto the tail.
