They, like gastropods and bivalves, are molluscs.  
The similarities between the eyes of this class and those of humans is an example of convergent evolution.  Among the most intelligent invertebrates, they have tentacles around their mouths and often have reduced or absent shells.  They, like gastropods and bivalves, are molluscs.  For ten points, name this class which includes the extinct ammonites, the chambered Nautilus, squid, and octopi.
The similarities between the eyes of this class and those of humans is an example of convergent evolution.  
Cephalopods (SEF-a-lo-pods or KEF-a-lo-pods)