FOUND IT!
Anthropogenie - Ernst Haeckel
https://archive.org/details/bub_gb_bWRvMI1b_i8C
It's on page 527/780
Oh so I had the wrong author. Nice work!
Showed up as page 556 of 816 to me for some reason.
Did you grab the PDF? That's the version I got. I think I tried to grab the epub, but it was all weird.
I was paging through the version on the webpage. I'd love to see that chapter in an English translation.
(post is archived)