Going into the "view list of species" section of the generator and clicking on a species brings up their species profile, and at the bottom of the page you have the "previous species" arrow and the "next species" arrow.

"Previous species" button doesn't seem to do anything at all.
"Next species" button launches you to the Zolnixi page regardless of what species you were viewing (and does nothing if you're viewing the Zolnixi page.)

Thanks. Fixed.