ABSTRACT Paul Gervais (1816–1879) developed an obvious interest for paleohistological researches during the latest phase of his career at the National Museum of Natural History, in Paris (Laboratory of Comparative Anatomy) and produced a collection of thin sections of extant and fossil eggshells, teeth and bone, although he did not published much on the subject. Current curatorial efforts have unveiled remains of this collection which is presented and assessed herewith.