Jean-Henri FABRE (1823-1915). Autograph manuscript, Class of Mammals; 5 1/2 pages in-fol. Complete chapter intended for a Zoology textbook, successively studying: division of vertebrates into classes; coat, suckling, varieties of form; adaptation of teeth to the animal's diet; herbivores and carnivores; disposition of enamel and ivory in the molars of herbivores; disposition of enamel and ivory in the molars of carnivores; ratelier of the Wolf; ratelier of the Horse; division of mammals into orders.