Near the end of the movie, Sergeant Allan fires 7 shots from a single-action pistol without reloading.
The man in the white suit who delivered the chrysalises is killed by the Moth Lady. Later, when his body is taken indoors, he is wearing a gray suit instead of white.
During the first morgue scene the corpse, who's feet are visible, keeps wiggling his toes.
When the person who was attacked is brought in a carriage to the police inspector and the professor, he moans. The police inspector says "I think he's still alive" even though he clearly sees that he is alive.