Gustav J%C3%A4ger (naturalist)
Gustav Jger was a German naturalist and hygienist.
He was born at the historic Pfarrhaus in the village of Brg, Neuenstadt am Kocher in Wrttemberg. After studying medicine at Tbingen, he became a teacher of zoology at Vienna. In 1868, he was appointed professor of zoology at the academy of Hohenheim, and subsequently he became teacher of zoology and anthropology at Stuttgart polytechnic and professor of physiology at the veterinary school. In 1884 he abandoned teaching and started practice as a physician in Stuttgart. He wrote various works on biological subjects, including Die Darwinsche Theorie und ihre Stellung zu Moral und Religion , Lehrbuch der allgemeinen Zoologie .
Source: Wikipedia