1924年。レビリョ教授の世界動物実験室が脚光を浴びた数年後、最新の研究成果を披露するため、教授が戻ってきた。レビリョ研究所は動物の進化に貢献し、生き物を直立させるための実験に取り組んでいる。そのため「レビリョラマ」と題するショーを、現在の研究所の本部である進化パレスで行うことにした。

1924. Years after the acclaimed Universal Animalarium of Professor Revillod, the professor has returned to present his latest work.

1924. Anos depois do aclamado Animalário Universal do professor Revillod, ele retorna para apresentar seus novos trabalhos.

Written in an appealing style and with a social and moral backdrop, this novel is full of intrigue and action with a psychological depth, as well as excellent descriptions and dialogue.