This digital collection consists of three monographs: two volumes of Histoire naturelle des mammifères (Volumes IX and X of Alfred Grandidier's Histoire Physique, Naturelle et Politique de Madagascar) and Jean Baptiste Audebert's Histoire Naturelle des Singes et des Makis. Each volume contains full color or black/white illustrations of lemurs in their natural forest habitats by artists such as J.G. Keulemans, and A. Jobin. These items were generously loaned by the Lemur Conservation Foundation to University of South Florida Tampa Library for digitization to make publicly available online.