Mollison was born in
Stuttgart to Scottish copper engraver James and his wife Emma from
Reutlingen. His father died in 1875, and he was raised in Germany. He studied medicine at
Freiburg with a dissertation on scarlet fever in 1898. He then practiced in Frankfurt am Main and in 1902 he went to study under
Theodor Boveri in Würzburg. In 1904, he joined an expedition into German East Africa where he collected and described a tree hyrax as
Dendrohyrax terricola (now a subspecies of
Dendrohyrax validus). He worked at the Anthropological Institute in Zurich from 1905 working under
Rudolf Martin. He was habilitated in 1910 with a work on the proportions of primate bodies. In 1918, he joined the
University of Wroclaw and succeeded
Hermann Klaatsch in 1921. In 1926, he succeeded Martin at
LMU Munich and became a director of the anthropological collections in Munich and worked there until his retirement in 1939 but continued as emeritus until 1944. == Anthropology contributions ==