First of all, I love seeing your posts come up in my feed. I had pretty much stopped coming on tumblr, but after following you I come on quite a bit more. So I’m not really sure if I am thanking you or not actually.
Anyway, I don’t know a whole lot about this, and apologies if you have already posted it! The only information I have is that it came from the Manly Palmer Hall collection of alchemical manuscripts (1500-1825). I wish the scan was a bit better, but still a pretty cool depiction.
It looks like this illustration is from a book of Italian occult and alchemical works associated with Alessandro Cagliostro, who was quite the personage in Pre-Revolutionary France.
The Embryonic Development of the Face. Ernst Haeckel. The Evolution of Man. Vol. 1. 1905 ed.