[Oztrich Boy]

I could just as easily assume, with equal merit, that those skulls are simply a mix of simian and human skulls and none of them are a "link" to something else.

Then you should be able to point to two adjacent skulls: one ape, one human - Between them would be the "missing link"

If you can't find such a postioning then there is no obvious ape-human gap, just a continium.

[Tamar1973]

Then you should be able to point to two adjacent skulls: one ape, one human - Between them would be the "missing link".

That is simply an assumption on your part, which doesn't match up with the facts.