Koen, that may have linked to your start page rather than the page with the plant (I've noticed the viewer is a bit quirky that way).
I only had a couple of minutes to look at it, so I'm not completely sure, but f you mean the plant on 68r, it might be Smilax aspera. It doesn't look like acanthus, which is what one might expect with a name like Acantina. It's not a great representation of Smilax either (which is why I'm not sure of the ID), but it's closer to Smilax than Acanthus.
I only had a couple of minutes to look at it, so I'm not completely sure, but f you mean the plant on 68r, it might be Smilax aspera. It doesn't look like acanthus, which is what one might expect with a name like Acantina. It's not a great representation of Smilax either (which is why I'm not sure of the ID), but it's closer to Smilax than Acanthus.