Léon Joseph Henry Humblot (1852–1914) was a French naturalist and botanical collector. He worked as a gardener for the Muséum national d’histoire naturelle in Paris, then in 1878 embarked on a research trip to Madagascar, where he set up an experimental garden and collected orchid species. In 1884 he entered the Comoros Islands as part of a geographical survey conducted by the natural history museum. In 1885 he procured the signature of a treaty with the Sultan of Bambao, thus establishing a basis for a “Grande Comore protectorate”. During the following year, the French had overall rule of the Comoros (Grande Comore, Anjouan, Mayotte and Moheli islands) .
Although he mainly collected botanical specimens, he also collected snails on the islands and these were identified by Arthur Morelet, who published two papers on the results (Morelet, 1886, 1888). He named three species after him: Otopoma humbloti Morelet, 1886 (fig. 4); Ennea humbloti Morelet, 1886 (fig. 2); Bulimus humbloti Morelet, 1888.
Morelet A. 1886. Malacologie des Comores (4e article). Récolte de M. Humblot à la Grande Comore. Journal de Conchyliologie 33:288–301.
Morelet A. 1888. Malacologie des Comores (Cinquième article). Deuxième voyage de M. Humblot. Journal de Conchyliologie 35:281–291.
 Léon Humblot à la Grande Comore
Arthur Morelet (1809–1892) started his malacological career with a privately funded collecting trip to Portugal (Morelet, 1845). He visited the natural history museum in Lisbon, which he described as “je ne sais trop dans quels termes en parler; un Français aurait mauvaise grâce à critiquer la pauvreté de cet établissement (…) est plutôt un musée de parade qu’une collection scientifique”. So he clearly was not impressed at all with the state of affairs in natural history. Nevertheless he also met with “M. Frédéric Wolwich, directeur du jardin botanique de Lisbonne, [who] a mis généreusement à ma disposition les matériaux qu’il avait recueillis dans les environs de cette capitale”. He named a freshwater mussel after him, Unio wolwichi.
In 1867 he published a large paper on molluscs from Angola collected by “Dr Friederich Welwitsch” and dedicated several new species to him.
These seemingly unrelated persons appeared to be one and the same when I looked up biographical data of the latter. Friedrich Martin Josef Welwitsch (1806–1872) was born in Austria and studied medicine and botany in Vienna. He worked a few years as physician but abandoned in 1839 the medical profession altogether. With the financial aid of a Württemberg botanical association Welwitsch travelled to Portugal where he became the director of the botanical gardens. His claim to fame came when with the further support of the Portuguese agent of the Württemberg botanical society he did research on the Canary Islands, on Madeira, and, in the interest of the Portuguese government, from 1853 in Angola, then a Portuguese colony. After eight strenuous years of exploring and collecting, Welwitsch returned to Portugal in 1861. Because of better working conditions, he went to London in 1863. There, he worked at first at the Natural History Museum and later at the Kew Gardens, categorising and cataloguing its enormous collection.
Apparently Morelet and Welwitsch kept in contact after they met in Lisbon, and Welwitsch trusted to him the malacological collection he made during his stay in Angola. This is still an important paper about the Angolan non-marine fauna.
Morelet A. 1845. Description des mollusques terrestres et fluviatiles du Portugal. Paris: Baillière, i–vii + 1–415.
Morelet A. 1867. Voyage du Dr Friederich Welwitsch exécuté par ordre du Gouvernement Portugais dans les royaumes d’Angola et de Benguella (Afrique équinoxiale). Mollusques terrestres et fluviatiles. Paris/London/New York: Baillière et fils, 1–102.