After receiving his medical doctorate, he participated as a physician and naturalist aboard the yacht Princesse Alice to the Canary Islands, Madeira, Cape Verde and the Azores (1901-02).
During the following year, he performed similar roles as part of the Créqui Montfort et Sénéchal de la Grange mission in South America.
Afterwards, he was appointed chef des travaux de parasitologie to the faculty of medicine in Paris, and in 1926 he became a professor in the school of malariology at the university.
[2][3] In 1924 he named several genera of parasites that affected large mammals (Khalilia, Paraquilonia, Buissonia, Henryella).
[4] In 1923, with Émile Brumpt and Maurice Langeron, he founded the journal Les Annales de Parasitologie humaine et comparée.