1856-1861. The Kharkoff Lycée--Bogomoloff and Socialism-- Atheism--Natural History studies--Private lodgings-- Private lessons in histology from Professor Tschelkoff --A borrowed microscope--First article--Italian opera-- The gold medal 28 CHAPTER VIII An early love--A schoolfellow's sister--A pretty sister-in-law 35 CHAPTER IX 1862. Journey to Germany--Leipzig, Würzburg--A hasty return 37 CHAPTER X 1863. Kharkoff University--Physiology--The Vorticella-- Controversy with Kühne--_The Origin of Species_-- Gastrotricha--University degree 40 CHAPTER XI 1864-1866. Heligoland--Giessen Congress--Leuckart--Visit to Leo Metchnikoff at Geneva--Socialist gatherings-- Metchnikoff's discovery appropriated by Leuckart--Naples --Kovalevsky--Comparative embryology--Embryonic layers-- Bakounine and Setchénoff--Cholera at Naples--Göttingen-- Anatomical studies--Munich; von Siebold--Music--Return to Naples--Intracellular digestion 43 CHAPTER XII 1867-1868. Petersburg--Baer Prize--Return home--Friendship with Cienkovsky--Odessa--Naturalists' Congress at Petersburg--Departure from Odessa--Zoological Lecturer's Chair at Petersburg--Messina--Enforced rest--Reggio-- Naples--Controversy with Kovalevsky--Visit to the B. family--Mlle. Fédorovitch--Educational questions-- Difficulties of life in Petersburg 58 CHAPTER XIII 1868-1873. Slight illness--Engagement to Mlle. Fédorovitch-- Marriage--Illness of the bride--Pecuniary difficulties --Spezzia--Montreux--Work in Petersburg University--The Riviera--Coelomata and Acoelomata--St. Vaast--Panassovka --Madeira--Mertens--Teneriffe--Return to Odessa--Bad news, hurried journey to Madeira--Death of his wife (1872)-- Return through Spain--Attempted suicide--Ephemeridæ 65 CHAPTER XIV 1874. Anthropological expedition to the Kalmuk steppes-- Affection of the eyes--Second expedition to the steppes-- The eggs of the _Geophilus_ 82 CHAPTER XV 1875. Studies on childhood--The family in the upper flat-- Lessons in zoology--Second marriage--Private life--Visit and death of Lvovna Nevahovna--Conjugal affection 86 CHAPTER XVI