Education
He studied several groups of marine animals, especially the Crustacea, in particular the Caprellidae.
He studied several groups of marine animals, especially the Crustacea, in particular the Caprellidae.
He worked as an assistant at Stazione Zoologica in Naples. Mayer is especially known for his systematizing of histological techniques. He also wrote the treatise Zoomikrotechnik in 1920.
He was a student of Ernst Haeckel.