Paul Gervais was a renowned French paleontologist and entomologist, and a professor of zoology at the Sorbonne. He also had a medical degree. Gervais produced a supplemental volume of illustrations for a zoology encyclopedia in 1844 called Atlas de Zoologie : ou Collection de 100 Planches. Its 100 plates include 250 illustrations of observed but little-known species. See a selection of these beautiful illustrations at BibliOdyssey.