That would be the ones, yes. Except that when it was mentioned, that was the defining. Unless one is so dim-witted that they have to be told the same information over and over and over and over and over and over and over again before it sinks into their skull.
He's also the same professor who stated in no uncertain terms that the works took place on our world, in the distant past, with all of his descriptions very clearly taking place in northwestern Europe. So sure, such an educated person who put tons of thought into his world would be all "fuck it, dey's all kinds of racial archetypes jus so I don't piss off Biomega in the future, lulz. I jus won't mention it cause, yanno, even tho I spend 20 pages describin' a single blade of grass, I'd leave sumfin like that out."