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ABSTRACT WE regret to learn of the death of PROF. FREDERIC HOUSSAY, professor of zoology at the Sorbonne since 1904, and dean of the faculty of science since 1919. Houssay's first piece

of work, done under the direction of Lacaze Duthiers, was on the operculum and pedal glands of gastropod molluscs, and he presented this as a thesis for his doctorate in 1884. The same year

he left for Persia as a member of the Dieulafoy mission, and returned in 1886. Soon afterwards he began a series of studies in vertebrate embryology, of which perhaps the best known is his

contribution to the discussion on the vertebral nature of the skull (1890). After following the development of the skull of axolotl, he supported the view that the skull is segmental and

represents ten segments. Houssay next turned to the study of dynamical morphology, and published on this subject two important works, “La forme et la vie”(1900) and “Morphologie dynamique”

(1910). He devoted special attention to the functional significance of the form of the body, tail, and fins of fishes, studying the movements in relation to form and stability, and he

published the main results in 1912 (“Forme, puissance, et stabilite des pois-sons”). Almost his last work was a continuation of the same line-a study of the flight of birds and the form of

their wings, for which he made detailed measurements of 238 skeletons. We join with our French colleagues in regretting the loss of an ingenious worker and a courteous colleague. ARTICLE PDF

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[Obituaries]. _Nature_ 106, 701 (1921). https://doi.org/10.1038/106701a0 Download citation * Published: 01 January 1921 * Issue Date: 27 January 1921 * DOI: https://doi.org/10.1038/106701a0

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