It’s not what you think. Jules Worms was a French artist who lived from 1832 to 1914. Both of the below images by him were recently added to the 19th century timeline (2nd half), and both are a bit quirky:

1860—Paris, France: Jules Worms depicts a somewhat villainous-looking trombonist in Le cabaret du Lapin-Blanc, an art work published in the periodical L’Illustration (see above image; public domain) (Vol. 36, 1860, p. 403).

1877—Paris, France: Artist Jules Worms depicts an ensemble of musicians with animal heads for the cover the piano score of La Lutte Artistique (“The Artistic Struggle”), a quadrille by E. Marie. The trombonist has what appears to be the head of a rooster. The conductor, of course, is represented by a monkey (see above image; public domain) (source: Library of Congress).