"All my griefs to this are jolly,
Naught so damned as melancholy."
-- Robert Burton
from The Anatomy of Melancholy
Biologist John Zachary Young was born March 18, 1907. He wrote The Anatomy of the Nervous System of Octopus vulgaris in 1971, which the above illustration is not from. I couldn’t find any pictures from it, so this is from Ernest Haeckel.