Biologist. Brother of Arthur James Balfour. Specialised in comparative embryology. Studied natural sciences at the University of Cambridge, 1870–3; from 1874, fellow, Trinity College, Cambridge, where he directed a morphological laboratory. Appointed lecturer on animal morphology, University of Cambridge, 1876; professor, 1882.
Sources: Alum. Cantab. ODNB. (See the bibliography for full references to sources)