Academic staff of the University of Toulouse

Félix Dujardin (5 April 1801 – 8 April 1860) was a French biologist born in Tours. He is remembered for his research on protozoans and other invertebrates.

Dominique Clos (25 May 1821, Sorèze – 19 August 1908) was a French physician and botanist.
He studied medicine and sciences in Toulouse and Paris, obtaining his medical degree in 1845 and his PhD in natural sciences in 1848. In 1853 he succeeded Alfred Moquin-Tandon as professor of botany at the University of Toulouse, maintaining this position until his retirement in 1889. At Toulouse, he made major contributions to its botanical garden and herbarium. From 1881 to 1908, he was a correspondent-member of the Académie des sciences.
He was the author of numerous works on descriptive botany, plant teratology, phytogeography and agricultural botany. As a taxonomist, he described many species from various plant families. Taxa with the specific epithet of closianus are named in his honor' an example being Astragalus closianus.

Étienne Jacques Marie Raymond Céstan (6 April 1872, Gaillac – 1934) was a French neurologist.
From 1892 he studied medicine in Paris, and was subsequently a hospital interne and a student of Édouard Brissaud at the Salpêtrière. In 1899 he received his medical doctorate, and was chosen by Fulgence Raymond to be chef de clinique at the Salpêtrière. In 1903 he was put in charge of the histopathology laboratory, and during the following year, he obtained his agrégation. Soon afterwards, he moved to Toulouse, where in 1913 he attained the chair of psychiatry. At this position he conducted research on the development of cerebrospinal fluid and the effects of intra-ventricular injection.

Édouard Benjamin Baillaud (14 February 1848 – 8 July 1934) was a French astronomer.

Jean Louis Armand de Quatrefages de Bréau (10 February 1810 – 12 January 1892) was a French biologist.